Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Close, but not quite. True, the G3 is brought out to Pin 8 in the 6JB6,
and that socket pin IS grounded in the T-4....
However, in the 6GJ5 G3 is brought internally to the cathode Pin _3_.
There is NO connection to Pin 8 in the 6GJ5. Simple! :-)
The tube manuals all say Pin 8 is "IC" for Internal Connection, but
after looking at many 6GJ5s of various brands, I have yet to find one
with anything connected to Pin 8. There may be one, but so far....
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>
EP Swynar wrote:
"EP Swynar" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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On Sunday 20th January, Garey wrote...
"...Bottom line is, the 6GJ5 works just fine in the T/TR-4(any) with the
same caveats as the 6JB6, i.e., not ALL brands work well..."
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Hi Garey,
Many thanks for that FB note...
However, I must say, I still remain skeptical and confused (both!) by the
notion of employing a 6GJ5 tube as a direct replacement for the 6JB6 in the
T4X transmitter...
Specifically, because pin #8 in the rig is directly connected to ground, and
in the 6GJ5 the suppressor grid is connected directly to the cathode
internally AND both the cathode & suppressor come out at pin #8 in that
tube, wouldn't you effectively have the finals in constant "key down" mode
with the substitutes plugged in...? As well, you'd have no cathode/"plate"
current meter readings, either --- correct?
What have I missed here...?
I dearly DO want to be a believer, but there must be some Missourian
doubting Thomas deep within me! Hi Hi. That, or my proverbial enquiring mind
just "NEEDS to know"...
~73~ Eddy VE3CUI - VE3XZ
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