<?xml version="1.0" encoding="UTF-8"?>
<!-- generator="wordpress.com" -->
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"><url><loc>https://robs-old-computers.com/collection/vt100/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/03/img_20240330_135945.jpg</image:loc><image:title>VT100</image:title><image:caption>VT100</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/03/h7831-output-connector-marked-up.jpg</image:loc><image:title>H7831 Output Connector - Marked Up</image:title><image:caption>00100001</image:caption></image:image><lastmod>2026-04-03T10:25:34+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2026/03/30/vt100-video-display-failed-flyback-transformer/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2026/03/img_20260314_192433118.jpg</image:loc><image:title>Ringing Tester</image:title><image:caption>Ringing Tester</image:caption></image:image><lastmod>2026-04-03T10:11:44+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/wish-list/</loc><lastmod>2026-04-03T10:08:13+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2024/04/28/vt100-external-video-fixed/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/04/vt100-after-dc012-replacement-1.jpg</image:loc><image:title>vt100-after-dc012-replacement-1</image:title><image:caption>External Video on VT100 Using a Video Converter After Replacing the DC012</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/04/vt100-black-violet-flyback-winding-ring-test.png</image:loc><image:title>VT100 Black-Violet Flyback Winding Ring Test</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/04/vt101-black-violet-flyback-winding-ring-test.png</image:loc><image:title>VT101 Black-Violet Flyback Winding Ring Test</image:title><image:caption>VT101 Black-Violet Flyback Winding Ring Test</image:caption></image:image><lastmod>2026-03-14T19:12:40+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/olivetti-m24/olivetti-m24-no-2/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251103_212256778_hdr.jpg</image:loc><image:title>IMG_20251103_212256778_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251102_134314906_hdr-e1762091717756.jpg</image:loc><image:title>IMG_20251102_134314906_HDR</image:title><image:caption>Olivetti M24 Running Sokoban</image:caption></image:image><lastmod>2025-11-15T17:22:10+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/collection/olivetti-m24/olivetti-m24-no-1/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251109_173331481_hdr.jpg</image:loc><image:title>Olivetti M24 (No. 1)</image:title><image:caption>Olivetti M24 (No. 1)</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251109_173610796_hdr.jpg</image:loc><image:title>Olivetti M24 (No. 1) Motherboard</image:title><image:caption>Olivetti M24 (No. 1) Motherboard</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251109_173424176_hdr.jpg</image:loc><image:title>Olivetti M24 (No. 1) Fox Research Network Card</image:title><image:caption>Olivetti M24 (No. 1) Fox Research Network Card</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251109_173632737_hdr.jpg</image:loc><image:title>Olivetti M24 (No. 1) Backup Battery</image:title><image:caption>Olivetti M24 (No. 1) Backup Battery</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251109_173146151_hdr.jpg</image:loc><image:title>Olivetti M24 (No. 1)</image:title><image:caption>Olivetti M24 (No. 1)</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251109_173445957.jpg</image:loc><image:title>Olivetti M24 (No. 1) Fox Research Network Card</image:title><image:caption>Olivetti M24 (No. 1) Fox Research Network Card</image:caption></image:image><lastmod>2025-11-15T17:21:48+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/collection/olivetti-m24/</loc><lastmod>2025-11-15T17:21:28+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/collection/</loc><lastmod>2025-11-09T17:57:36+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2025/11/09/olivetti-m24-power-supply-failure/</loc><lastmod>2025-11-09T16:54:47+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2025/11/09/olivetti-m24-ank-2462-keyboard/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251108_204724848_hdr.jpg</image:loc><image:title>IMG_20251108_204724848_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_235340749_hdr.jpg</image:loc><image:title>IMG_20251105_235340749_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_184614121_hdr.jpg</image:loc><image:title>IMG_20251105_184614121_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_170728832_hdr.jpg</image:loc><image:title>IMG_20251105_170728832_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_165758759_hdr.jpg</image:loc><image:title>IMG_20251105_165758759_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_163611754_hdr.jpg</image:loc><image:title>IMG_20251105_163611754_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_152154503_hdr.jpg</image:loc><image:title>IMG_20251105_152154503_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_155039256_hdr.jpg</image:loc><image:title>IMG_20251105_155039256_HDR</image:title><image:caption>Broken Lug Glued Back</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_153812378_hdr.jpg</image:loc><image:title>IMG_20251105_153812378_HDR</image:title><image:caption>Broken Lug</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/11/img_20251105_153705864_hdr.jpg</image:loc><image:title>IMG_20251105_153705864_HDR</image:title></image:image><lastmod>2025-11-09T16:52:23+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/rainbow-100a/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/11/img_20241116_173019.jpg</image:loc><image:title>IMG_20241116_173019</image:title><image:caption>Rainbow System Board with Floppy Disk Controller for RX50</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/11/img_20241116_170508.jpg</image:loc><image:title>IMG_20241116_170508</image:title><image:caption>The clean interior of the Rainbow</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/11/img_20241116_170305.jpg</image:loc><image:title>IMG_20241116_170305</image:title><image:caption>VR201 with some dirt and paint marks</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/11/img_20241116_170234.jpg</image:loc><image:title>IMG_20241116_170234</image:title><image:caption>VR201 with cataracts</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/11/img_20241116_170202.jpg</image:loc><image:title>IMG_20241116_170202</image:title><image:caption>Rainbow 100A as Received Minus the Floor Stand</image:caption></image:image><lastmod>2025-09-12T05:54:00+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/collection/decstation-220/</loc><lastmod>2025-09-12T05:28:51+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2022/11/20/dec-rainbow-h7842-power-supply-failure/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2022/11/img_20221120_165913.jpg</image:loc><image:title>img_20221120_165913</image:title><image:caption>Failed Diode from H7842 Power Supply</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2022/11/img_20221120_165850.jpg</image:loc><image:title>img_20221120_165850</image:title><image:caption>Failed transistor from H7842 Power Supply</image:caption></image:image><lastmod>2025-09-07T11:06:09+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2023/06/29/h7842-finally-fixed/</loc><lastmod>2025-09-07T11:05:43+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2025/07/29/rainbow-100a-restoration/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250729_082602856.jpg</image:loc><image:title>IMG_20250729_082602856</image:title><image:caption>Rainbow 100A</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250729_211935106.jpg</image:loc><image:title>IMG_20250729_211935106</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250729_220026917.jpg</image:loc><image:title>IMG_20250729_220026917</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20241130_105431.jpg</image:loc><image:title>IMG_20241130_105431</image:title><image:caption>00100000</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20241201_080516.jpg</image:loc><image:title>IMG_20241201_080516</image:title><image:caption>00100000</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20241116_170202.jpg</image:loc><image:title>IMG_20241116_170202</image:title><image:caption>Rainbow 100A as Received Minus the Floor Stand</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250725_184615292_hdr-marked-up.jpg</image:loc><image:title>IMG_20250725_184615292_HDR Marked up</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250725_131758072_hdr.jpg</image:loc><image:title>IMG_20250725_131758072_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250725_134614262_hdr.jpg</image:loc><image:title>IMG_20250725_134614262_HDR</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/07/img_20250725_113446004.jpg</image:loc><image:title>IMG_20250725_113446004</image:title></image:image><lastmod>2025-09-07T11:05:21+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/projects/mu5/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/05/mu5-from-christine-burns.jpg</image:loc><image:title>MU5 from Christine Burns</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2017/07/mu5con1.gif</image:loc><image:title>mu5con1</image:title></image:image><lastmod>2025-05-26T12:12:47+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/projects/mu5/muss/muss-on-membrain-mb7700/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/05/membrain-from-keith-smith-2.jpg</image:loc><image:title>Membrain from Keith Smith-2</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2025/05/membrain-from-keith-smith-1.jpg</image:loc><image:title>Membrain from Keith Smith-1</image:title></image:image><lastmod>2026-03-03T21:09:30+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2024/10/09/vt101-on-display-at-reading-museum/</loc><lastmod>2024-10-09T18:30:10+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/vt101/</loc><lastmod>2024-06-08T10:04:12+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/collection/vt102/</loc><lastmod>2024-06-08T09:08:34+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2017/07/15/decstation-5000240/</loc><lastmod>2024-04-28T21:20:48+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/07/19/decstation-5000240-progress/</loc><lastmod>2024-04-28T21:20:36+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/08/27/decstation-5000-model-240-h7878-power-supply-failure/</loc><lastmod>2024-04-28T21:20:29+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/08/28/decstation-5000-model-240-h7878-possible-fault-found/</loc><lastmod>2024-04-28T21:20:18+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/09/17/decstation-5000-model-240-psu-failing-under-moderate-load/</loc><lastmod>2024-04-28T21:20:09+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/10/01/decstation-5000-model-240-psu-fixed/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2017/10/h7878-parts-replaced1.jpg</image:loc><image:title>H7878 Parts Replaced</image:title></image:image><lastmod>2024-04-28T21:20:00+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/10/13/decstation-5000240-running-ultrix/</loc><lastmod>2024-04-28T21:19:51+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/01/01/update-on-h7826-power-supply-repair/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2017/12/h7826-primary.png</image:loc><image:title>H7826-Primary</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2017/12/5019572.png</image:loc><image:title>5019572 Schematic</image:title><image:caption>Courtesy of Matt Burke, http://9track.net//</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2017/12/50-19530.png</image:loc><image:title>50-19530</image:title></image:image><lastmod>2024-04-28T21:19:39+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/10/23/corroded-h7826-power-supply/</loc><lastmod>2024-04-28T21:19:31+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/09/23/h7826-power-supply-repaired/</loc><lastmod>2024-04-28T21:19:21+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/10/07/decstation-5000-240-with-the-turbochannel-extender/</loc><lastmod>2024-04-28T21:17:56+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2023/10/01/vt100-ram-fault/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2023/10/img_20231001_214709.jpg</image:loc><image:title>img_20231001_214709</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2023/10/h7831-output-connector-marked-up.jpg</image:loc><image:title>h7831-output-connector-marked-up</image:title></image:image><lastmod>2025-08-06T19:45:16+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2023/11/19/vt100-keyboard-constant-clicking-fault/</loc><lastmod>2024-04-28T06:01:06+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/vaxmate/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2024/04/battery-replacement.jpg</image:loc><image:title>battery-replacement</image:title><image:caption>VAXmate Battery Replacement</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-lk250-keyboard-cable.jpg</image:loc><image:title>VAXmate LK250 Keyboard Cable</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-lk250-keyboard-cable-connectors.jpg</image:loc><image:title>VAXmate LK250 Keyboard Cable Connectors</image:title></image:image><lastmod>2024-04-07T09:14:16+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2022/02/10/pdp-11-24-progress/</loc><lastmod>2022-02-12T22:59:29+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2021/10/10/dec-legacy-2021-windermere-9th-10th-october/</loc><lastmod>2021-10-10T21:59:54+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2021/09/20/vaxstation-3520/</loc><lastmod>2021-09-20T22:30:24+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2021/05/02/decstation-220-progress-and-failure/</loc><lastmod>2021-05-03T09:00:28+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2021/01/23/bad-dssi-rf72-hard-disk/</loc><lastmod>2021-01-24T14:17:16+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2021/01/01/kda50-and-some-sdi-disks/</loc><lastmod>2021-01-01T21:43:13+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/05/12/vaxmate-flyback-transformer/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/05/flyback-bad-ringing.png</image:loc><image:title>Flyback Bad Ringing</image:title><image:caption>Poor ringing from the flyback transformer</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/05/flyback-good-ringing.png</image:loc><image:title>Flyback Good Ringing</image:title><image:caption>Good ringing from the flyback transformer</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/05/monitor-flyback-transformer-marked-1.jpg</image:loc><image:title>Flyback Transformer</image:title><image:caption>VAXmate flyback transformer from the monitor board with pins numbered</image:caption></image:image><lastmod>2020-05-12T21:45:13+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/05/10/microvax-3100-model-95-power-supply/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/05/20200510_122901.jpg</image:loc><image:title>MicroVAX 3100 Model 95</image:title><image:caption>Showing 32MB of installed memory</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/05/20200510_123013.jpg</image:loc><image:title>MicroVAX 3100 Model 95</image:title><image:caption>From the front with RX33 and TZ30</image:caption></image:image><lastmod>2020-05-10T21:54:43+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/04/18/vaxmate-h7270-psu-fixed-but-no-video/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/04/h7270-secondary-side.png</image:loc><image:title>H7270 Secondary Side</image:title><image:caption>H720 Secondary Side</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/04/h7270-control-pulse-width-modulator-1.png</image:loc><image:title>H7270 Primary Side</image:title><image:caption>H7270 Primary Side</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/04/vaxmate-video-board-replaced-parts.jpg</image:loc><image:title>VAXmate Monitor Board - Replaced Parts</image:title><image:caption>VAXmate Monitor Board With Replaced Capacitors Marked</image:caption></image:image><lastmod>2020-04-18T11:11:47+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/03/28/further-analysis-of-the-vaxmate-h7270-psu-failure/</loc><lastmod>2020-04-18T10:37:53+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/01/12/possible-cause-of-vaxmate-h7270-psu-failure/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/01/h7270-transformer-p1-ringing-test.png</image:loc><image:title>H7270 Transformer P1 Ringing Test</image:title><image:caption>H7270 Transformer P1 Ringing Test</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/01/h7270-transformer.jpg</image:loc><image:title>H7270 Transformer</image:title></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/01/h7270-fault-primary.png</image:loc><image:title>H7270 Fault Primary</image:title><image:caption>CH1: Vcc for NE555 and Vref for UC3842
CH2: Base of switching transistor Q1
CH3: Gate of SCR D19 which shuts down on overcurrent
CH4: Current sense resistor (R13)</image:caption></image:image><lastmod>2020-04-18T10:37:18+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2019/12/31/vaxmate-psu-h7270-failure/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-psu-primary-side-labelled.jpg</image:loc><image:title>H7270 Primary Side - Components Labelled</image:title><image:caption>VAXmate H7270 Power Supply - Primary Side With Parts Labelled</image:caption></image:image><lastmod>2020-04-18T10:36:37+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/04/06/partial-re-cap-of-h7109-c-psu-for-a-vaxstation-4000-vlc/</loc><lastmod>2020-04-06T21:17:59+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/04/04/memory-for-a-decstation-2100/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/04/50-19464-02-memory-module.jpg</image:loc><image:title>50-19464-02 Memory Module</image:title><image:caption>50-19464-02 Memory Module</image:caption></image:image><lastmod>2020-04-04T12:23:25+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2020/03/29/h7874-power-supply/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2020/03/12v-output-board.png</image:loc><image:title>12V Output Board</image:title><image:caption>H7874 Power Supply - 12V Output Board</image:caption></image:image><lastmod>2020-03-29T15:41:56+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/decstation-5000-model-240/</loc><lastmod>2019-12-31T08:28:16+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2019/12/21/vaxmate/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-with-some-boards-removed.jpg</image:loc><image:title>VAXmate With Some Boards Removed</image:title><image:caption>VAXmate with some boards removed.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-with-cover-off.jpg</image:loc><image:title>VAXmate With Cover Off</image:title><image:caption>VAXmate with the cover taken off</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-video-board.jpg</image:loc><image:title>VAXmate Video Board</image:title><image:caption>VAXmate video board</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-system-board.jpg</image:loc><image:title>VAXmate IO Board</image:title><image:caption>VAXmate IO board</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-psu.jpg</image:loc><image:title>VAXmate H7270 PSU</image:title><image:caption>VAXmate H7270 power supply</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-from-the-side-with-boards-and-floppy-drive-removed.jpg</image:loc><image:title>VAXmate From The Side With Boards and Floppy Drive Removed</image:title><image:caption>VAXmate from the side with boards and floppy disk drive removed. The two wires at the bottom left are for the front power LED</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-from-behind-with-some-boards-removed.jpg</image:loc><image:title>VAXmate From Behind With Some Boards Removed</image:title><image:caption>VAXmate with some boards removed. Floppy disk drive connections on the left.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-from-above-with-cover-off.jpg</image:loc><image:title>VAXmate From Above With Cover Off</image:title><image:caption>VAXmate from above with the cover off. The two black wires going to a header on the left hand board are for the speaker.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-floppy-disk-drive-from-the-side.jpg</image:loc><image:title>VAXmate Floppy Disk Drive From The Side</image:title><image:caption>VAXmate floppy disk drive. The rubber bumpers have deteriorated and left a bit of a mess on the board.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/12/vaxmate-floppy-disk-drive-connections.jpg</image:loc><image:title>VAXmate Floppy Disk Drive Connections</image:title><image:caption>VAXmate floppy disk drive connections and speaker connection</image:caption></image:image><lastmod>2022-01-10T19:22:56+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/projects/mu5/muss/muss-restoration/</loc><lastmod>2019-09-08T09:43:40+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2019/05/02/musl-compiler-builds-a-simple-mu5-program/</loc><lastmod>2019-05-03T08:19:03+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2019/03/17/teletype-model-33-asr-ribbon-feed/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2019/03/detached-feed-pawl-spring.jpg</image:loc><image:title>OLYMPUS DIGITAL CAMERA</image:title><image:caption>OLYMPUS DIGITAL CAMERA</image:caption></image:image><lastmod>2019-03-17T19:53:00+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/08/12/flocoder-flip-now-processes-its-own-source/</loc><lastmod>2018-08-12T12:05:24+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/projects/mu5/muss/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/05/muss_tape.jpg</image:loc><image:title>MUSS Source Tape</image:title><image:caption>Tape recovered by Delwyn Holroyd at The National Museum of Computing. Copyright Delwyn Holroyd, reproduced with permission</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/05/muss-tape.jpg</image:loc><image:title>MUSS Tape</image:title><image:caption>Brian Tompsett's Tapes with MUSS Source Code. Copyright Brian Tompsett, with permission</image:caption></image:image><lastmod>2025-05-07T14:13:25+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2018/07/30/flocoder-flip-progress/</loc><lastmod>2018-07-30T19:03:41+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/07/03/muss-source-code-now-available/</loc><lastmod>2018-07-03T19:06:02+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/05/12/flocoder/</loc><lastmod>2018-05-12T20:54:34+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/05/03/muss-source-code/</loc><lastmod>2021-11-01T20:07:18+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/05/07/muss-github-project/</loc><lastmod>2018-05-12T13:56:54+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/projects/mu5/mu5-pictures/</loc><lastmod>2018-05-02T20:23:33+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/projects/mu5/mu5-manuals/</loc><lastmod>2018-05-02T20:23:09+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2018/03/17/another-dec-rainbow-100/</loc><lastmod>2019-02-06T21:07:58+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2018/02/26/more-leaking-batteries/</loc><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/02/386sx-board.jpg</image:loc><image:title>386SX Board</image:title><image:caption>386SX motherboard with an ALI chipset. Note the leaking battery.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/02/386sx-board-with-leaking-battery.jpg</image:loc><image:title>386SX Board With Leaking Battery</image:title><image:caption>Leaking battery on 386SX board</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/02/386-board-with-battery-removed.jpg</image:loc><image:title>386 Board With Battery Removed</image:title><image:caption>386SX board with leaking battery removed</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/02/286-board.jpg</image:loc><image:title>286 Board</image:title><image:caption>286 Motherboard with Headland HT-12 Chipset. Note the leaking battery.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/02/286-board-with-leaking-battery.jpg</image:loc><image:title>286 Board With Leaking Battery</image:title><image:caption>Leaking battery on 286 Motherboard.</image:caption></image:image><image:image><image:loc>https://robs-old-computers.com/wp-content/uploads/2018/02/286-board-with-battery-removed.jpg</image:loc><image:title>286 Board With Battery Removed</image:title><image:caption>286 Motherboard with leaking battery removed.</image:caption></image:image><lastmod>2018-02-26T23:16:39+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/vaxstation-3100-model-40/</loc><lastmod>2017-12-16T08:44:11+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2017/11/05/repair-progress-on-the-h7826-power-supply/</loc><lastmod>2017-11-05T17:07:21+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/10/29/imaging-rd51-from-a-dec-rainbow-100-model-b/</loc><lastmod>2021-10-11T18:20:53+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/10/17/booting-vaxen-from-the-network/</loc><lastmod>2017-10-17T20:54:46+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/08/26/decstation-220-monitor-sense-circuit-problem/</loc><lastmod>2017-08-27T09:27:36+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/collection/vaxstation-4000-model-60/</loc><lastmod>2017-08-20T08:52:16+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2017/08/19/decstation-220-faulty-parts-found/</loc><lastmod>2017-08-19T19:02:54+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/08/13/decstation-220-update/</loc><lastmod>2017-08-13T19:28:23+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/07/31/decstation-220-now-getting-corrupted-video/</loc><lastmod>2017-07-31T20:38:45+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2017/07/27/decstation-220/</loc><lastmod>2017-07-30T07:57:14+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/projects/mu5/building-and-running-the-mu5-emulator/</loc><lastmod>2017-07-10T18:58:43+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/projects/</loc><lastmod>2017-07-06T06:19:15+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2017/07/05/rejuvenating-this-site/</loc><lastmod>2017-07-05T19:03:02+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/blog/</loc><lastmod>2017-07-05T18:14:18+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://robs-old-computers.com/2012/07/31/retrochallenge-2012-designated-router-4/</loc><lastmod>2013-04-08T20:39:08+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2012/07/29/retrochallenge-2012-refactoring/</loc><lastmod>2012-07-29T19:37:10+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2012/07/07/retrochallenge-2012-adjacency-staying-up-2/</loc><lastmod>2012-07-07T07:16:15+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2012/07/04/retrochallenge-2012-adjacency-up-5/</loc><lastmod>2012-07-04T20:40:35+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2012/07/02/retrochallenge-2012-getting-started/</loc><lastmod>2012-07-02T18:50:25+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2008/03/03/current-activity/</loc><lastmod>2013-06-13T23:08:27+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2007/09/01/getting-a-decserver-200mc-working/</loc><lastmod>2022-11-03T13:38:42+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2007/07/11/resetting-the-system-password-on-a-vaxstation-4000-vlc/</loc><lastmod>2007-07-11T21:19:03+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2007/06/17/headless-vaxstation/</loc><lastmod>2018-05-05T15:44:01+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2007/05/27/copying-vms-backup-and-text-files-from-cd-rom/</loc><lastmod>2007-05-27T10:16:49+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2007/05/13/my-introduction-to-retro-computing/</loc><lastmod>2007-05-13T21:08:46+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com/2007/05/13/migrating-from-intuit-quicken-to-microsoft-money/</loc><lastmod>2007-05-13T19:27:53+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://robs-old-computers.com</loc><changefreq>daily</changefreq><priority>1.0</priority><lastmod>2026-04-03T10:25:34+00:00</lastmod></url></urlset>
