1 August 2017
- 17:3317:33, 1 August 2017 diff hist 0 m 1L5 correct discontinuation year based on price list from 1972 new products catalog
- 17:2717:27, 1 August 2017 diff hist −8 m 1S2 correct discontinuation year based on price list from 1972 new products catalog
- 17:2717:27, 1 August 2017 diff hist −8 m T correct discontinuation year based on price list from 1972 new products catalog
- 17:2617:26, 1 August 2017 diff hist −8 m Q correct discontinuation year based on price list from 1972 new products catalog
- 17:2617:26, 1 August 2017 diff hist −8 m M correct discontinuation year based on price list from 1972 new products catalog
- 17:2517:25, 1 August 2017 diff hist −8 m L correct discontinuation year based on price list from 1972 new products catalog
- 16:2616:26, 1 August 2017 diff hist 0 m CA Discontinued 1973
- 16:2516:25, 1 August 2017 diff hist +1 m CA I was wrong, CA was longest-lived, period. Got information from Price List at end of 1972 New Products mini-catalog.
- 15:4315:43, 1 August 2017 diff hist −3 m 1S1 Remove extraneous "to"
- 15:4115:41, 1 August 2017 diff hist +29 m 1S1 Add designer
13 June 2017
- 12:4312:43, 13 June 2017 diff hist 0 m 132 93 ohm termination for max bandwidth, not 50 ohm
1 February 2016
- 18:2418:24, 1 February 2016 diff hist −11 Nuvistor Remove 6EW6, not a Nuvistor
- 18:2418:24, 1 February 2016 diff hist +4 m 7587 Add link
- 18:2318:23, 1 February 2016 diff hist −3 6EW6 Miniature not Nuvistor
- 18:2018:20, 1 February 2016 diff hist +9 m 7586 Used by 1A5
- 18:2018:20, 1 February 2016 diff hist +28 m 6CW4 6CW4 used by 1A7
- 18:1218:12, 1 February 2016 diff hist +12 m 7586 453 uses 8393, 8393 is 13V not 12V
- 18:1018:10, 1 February 2016 diff hist +12 8393 8393 used by 1A7
- 18:0918:09, 1 February 2016 diff hist +62 7586 1A7 uses 8393 not 7586