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Old 1st March 2008, 04:57 PM   #1
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Default 6BG6GA adapter instructions needed

I put the instructions for making the 6BG6GA adapters away for safe keeping and now I cannot remember where Must be a senior moment

Anyone got a spare copy?
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Old 1st March 2008, 05:19 PM   #2
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Maybe:
http://www.vacuumtubes.com/6BG6.html

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Old 1st March 2008, 05:45 PM   #3
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That doesn't help ....no info
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Old 1st March 2008, 06:18 PM   #4
pchw is offline pchw  United States
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Use the forum to PM me your email addy, I will scan my copy for you.
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Old 2nd March 2008, 08:47 PM   #5
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Thanks Fred
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Old 3rd January 2009, 11:59 AM   #6
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Default Another 6BG6GA question

I would like to wire in 6BG6GA's permanent in a stereo 70 I have.

Would it be permissible to use the pin #6 a a tie point to wire in the high voltage plate wire?
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Old 3rd January 2009, 12:05 PM   #7
SY is offline SY  United States
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It should be. Usually, if a pin shouldn't be used, the base chart will say something like "IC" (internal connection) rather than "NC" (no connection). Now, since that pin is right next to the grid pin, you should take some precaution to avoid arcs.
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Old 3rd January 2009, 12:18 PM   #8
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Quote:
Now, since that pin is right next to the grid pin, you should take some precaution to avoid arcs.
Then I shouldn't use it for fear of arcs?
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Old 3rd January 2009, 12:51 PM   #9
SY is offline SY  United States
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Depends. If you make sure that the pins are bent back away from one another, avoid points, and insulate with heat shrink (all easy measures), you'll be fine. This isn't kilovolts, it's about 500V. If you have any qualms, then use a terminal strip.
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Old 3rd January 2009, 03:11 PM   #10
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Quote:
Originally posted by SY
Depends. If you make sure that the pins are bent back away from one another, avoid points, and insulate with heat shrink (all easy measures), you'll be fine. This isn't kilovolts, it's about 500V. If you have any qualms, then use a terminal strip.
hey SY,
I'd say it is a bit more than 500V. The plate will have signal AC on it. So B+ plus positive plate swing. IIRC my back-ov-the-envelope calculations for a St.70 that is around 350V or so at full power. 800 V is a peak, and to that we'd add bias and the negative g1 voltage applied by signal. Probably another 100V or so...so we are indeed near 1 kV...heh-heh-heh
cheers,
Douglas
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