|
Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
|
Thread Tools |
11th Sep 2019, 8:48 pm | #1 |
Heptode
Join Date: May 2015
Location: Chatham, Kent, UK.
Posts: 965
|
BSX20 whisker short
Hi just found a bsx20 this is a npn silicon with short emitter to case the colector is int conected to case so the tr is s/c c to e . 12volt between e and case - to e cleared sc prob temp fix this is in a Howes dfd4 counter that i built many years ago it was working yesterday Mick
|
11th Sep 2019, 9:07 pm | #2 |
Dekatron
Join Date: Jan 2003
Location: Bradford on Avon, Wiltshire, UK.
Posts: 3,310
|
Re: BSX20 whisker short
I’ve a couple of NOS ones I can send you if you like, or at least the CV equivalent.
__________________
"Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly." |
11th Sep 2019, 9:08 pm | #3 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,009
|
Re: BSX20 whisker short
Thanks for the heads-up!
I've got a load of TO5-cased CV7343 (BCY30-equivalent) transistors here, all produced by the Texas Instruments plant in Bedford in the 1960s - I've been happy to use them for generic duty in things like relay-drivers, but is this wise?? |
11th Sep 2019, 9:34 pm | #4 |
Heptode
Join Date: May 2015
Location: Chatham, Kent, UK.
Posts: 965
|
Re: BSX20 whisker short
Hi thanks fitted bc 109 seems to work ok only used as a pre amp for local osc in 2.3 to 3.3 mhz will take you up on offer if needed thanks again Mick
|
11th Sep 2019, 11:42 pm | #5 |
Dekatron
Join Date: Jun 2016
Location: London, UK.
Posts: 3,687
|
Re: BSX20 whisker short
2n2369 is same part. CPC still sell new ones for £0.44 a go!
Quite worrying to hear of tin whiskers in them though! |
12th Sep 2019, 11:24 am | #6 |
Rest in Peace
Join Date: Sep 2008
Location: Solihull, West Midlands, UK.
Posts: 4,872
|
Re: BSX20 whisker short
2.3mhz must need a really big antenna!
|
12th Sep 2019, 12:15 pm | #7 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,970
|
Re: BSX20 whisker short
It may not be a tin whisker of course. There may have been a different manufacturing fault which has finally 'gone bad'.
|