Quote:
Originally Posted by OldTechFan96
Thanks wme_bill. I will try a pair of BF256s as they are available locally.
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A point worth mentioning is that BF256 pin designations seem not always to conform to the datasheets. When I built a 'Mini-Mod pantry transmitter' a while back, which used a BF256, initially the Min-Mod wouldn't work. I suspected the BF256 connections were wrong, and looking into it further, it became more of a conundrum.
At pics 1 & 2 below, I've attached a couple of bits of info that I drew up at the time.
A transistor tester won't come to your rescue - leastways, not if it's a Peak Atlas DCA55.
The displays which mine showed are below at pics 3,4,&5:
1) 'It's a JFET'. Well I knew that already.
2) 'Drain and Source not identified'. Huh?
3) 'Gate identified'. (Allegedly).
Ho hum...
Good luck with the 'scope refurb.