Yes - I noticed they were selected as well but, like you say, we don't know the criteria. New 2N3053s have a range of 50 to 250 for hFE so I suppose it's a crap-shoot as to what one gets.
Thanks,
Barry - N4BUQ
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On 2/3/2024 1:11 PM, n4buq wrote:
I have three transistors with which I can use to test for Q32143:
I am late joining this thread, and although I have look at the previous
posts in this thread my remarks may already have come up.
Note that Q32143 and Q3220 are shown on 7704A change sheet M32489, dated
17May1978, as selected parts. The selection criteria are not shown on
the change sheet, but, in my experience, the most common selection
criterion for Tek and HP selected transistors is hFE.
--
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
