7 May 2021
- 16:1616:16, 7 May 2021 diff hist +9 1A7 Replaces D and E
11 April 2021
- 13:5513:55, 11 April 2021 diff hist +34 TU-50 It's a signal generator AND a calibration fixture :)
5 April 2021
- 08:5308:53, 5 April 2021 diff hist −2 m 1A5 common-mode details
- 08:4408:44, 5 April 2021 diff hist +24 m 1A7 Replaces Type E
4 April 2021
- 19:4819:48, 4 April 2021 diff hist +77 1A7 shortest product life
- 19:3919:39, 4 April 2021 diff hist +194 1A6 Specs and circuitry
- 19:3519:35, 4 April 2021 diff hist 0 1A7 8393 not 7586
15 March 2021
- 13:2813:28, 15 March 2021 diff hist +498 Delay line Reverse Termination
- 13:0413:04, 15 March 2021 diff hist +1 m 585 No edit summary
6 March 2021
- 08:5608:56, 6 March 2021 diff hist 0 T5330 Fix table - P2 part was labeled "P1" and vice versa. New version matches 1966 catalog.
2 March 2021
- 08:0008:00, 2 March 2021 diff hist +33 P6032 Fix manual link. Still kind of wrong, please fix.
- 07:5407:54, 2 March 2021 diff hist 0 N File:070-327.pdf No edit summary
1 March 2021
- 14:5014:50, 1 March 2021 diff hist −6 m D Early production not "some production"
- 14:4614:46, 1 March 2021 diff hist −21 D Remove picture of Type CA plugin misnamed as Type D.
22 February 2021
- 18:4218:42, 22 February 2021 diff hist −4 m W No edit summary
- 18:4018:40, 22 February 2021 diff hist −22 m Z No edit summary
- 17:0417:04, 22 February 2021 diff hist +4 m H No edit summary
- 16:5816:58, 22 February 2021 diff hist +20 m E No edit summary
- 16:5516:55, 22 February 2021 diff hist +20 D No edit summary
- 16:5416:54, 22 February 2021 diff hist +8 m D No edit summary
- 16:5316:53, 22 February 2021 diff hist −19 m D No edit summary
- 16:5216:52, 22 February 2021 diff hist +1 D No edit summary
- 16:5116:51, 22 February 2021 diff hist +192 D D was superseded first by W, then 1A6.
- 14:1614:16, 22 February 2021 diff hist +6 m W No edit summary
- 14:0414:04, 22 February 2021 diff hist +3 m W No edit summary
- 12:5312:53, 22 February 2021 diff hist +88 8056 157-0099-00 selection procedure exceeds tube max ratings!
- 10:3710:37, 22 February 2021 diff hist +145 W late production uses JFETs not 8056 Nuvistors
- 10:3510:35, 22 February 2021 diff hist +66 Nuvistor 8056 used in more things
- 10:3510:35, 22 February 2021 diff hist +6 m 8056 not used in late W
21 February 2021
- 16:2416:24, 21 February 2021 diff hist +46 8056 Also used in 1S1, early 3S3, and 3T4
12 January 2021
- 09:0209:02, 12 January 2021 diff hist +43 1S1 Add my repair notes in case it helps others fix theirs.
- 08:5908:59, 12 January 2021 diff hist +52 N File:David-Wise-1S1-Repair-Notes.txt My 1S1 repair saga. Hope it gives clues for others. current
5 January 2021
- 14:4714:47, 5 January 2021 diff hist +8 500 Series plug-in interface Add instrument type to photo caption
- 12:2712:27, 5 January 2021 diff hist −1 500 Series plug-in interface "1-series" not "1A-series" for consistency elsewhere
25 October 2020
- 13:4713:47, 25 October 2020 diff hist +219 N File:535-545-Ceramic-Strip-Flashover.zip Type 535-545 scopes, ceramic strip locations with the most risk of silver migration and arcing, and my attempt at a countermeasure. Text file plus photos. Put where you think best. Regards, Dave Wise. CC-BY-SA 4.0 . current
25 February 2020
- 15:0215:02, 25 February 2020 diff hist −13 m CK512AX remove redundant word
5 January 2019
- 21:2821:28, 5 January 2019 diff hist +41 m P6023 Add 1MOhm category since it is meant for use with a 1-meg input.
- 21:2621:26, 5 January 2019 diff hist +135 P6023 This probe is meant for use in pairs on a differential amp
20 December 2018
- 10:2510:25, 20 December 2018 diff hist 0 m T5032 spelling
24 October 2018
- 07:2507:25, 24 October 2018 diff hist +41 m G 53G has five tubes
29 December 2015
- 14:3914:39, 29 December 2015 diff hist +43 2N2207 No edit summary
22 December 2012
- 20:3720:37, 22 December 2012 diff hist +95 m 7313 Correct bandwidth
16 May 2011
- 14:3214:32, 16 May 2011 diff hist +1 m 1S1 No edit summary
- 14:2914:29, 16 May 2011 diff hist −40 m 1L5 No edit summary
- 14:2514:25, 16 May 2011 diff hist +19 m 1M1 fix date tag
- 14:2314:23, 16 May 2011 diff hist +71 m 1M1 TU-2, EP-53
- 14:2114:21, 16 May 2011 diff hist 0 m 1M1 bracket oops
- 14:2014:20, 16 May 2011 diff hist +1 m C No edit summary
- 14:1914:19, 16 May 2011 diff hist +19 m CA No edit summary
- 14:1714:17, 16 May 2011 diff hist +4 m E "5xxA" -> "A-suffix"