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Old 24th October 2006, 10:43 AM   #1
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Default Got my 6BG6GA's last night

After hearing SY speak a while back about the 6BG6GA's he was using in some of his amps I was moved to order a matched quad of them and (4) of the put together adapters. Very nice tube indeed and the price is well within anyones means. The site I purchased them from claims they ran them on 500 VDC plate and I think 450 VDC screen. I believe they are rated at 35 watts.

Could I try these in my Quicksilvers that run about 478 plate and run 50mA each thru them? That would be about 24 watts?

Thoughts?
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Old 24th October 2006, 11:31 AM   #2
SY is offline SY  United States
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That should work, but check the plate-to-plate impedance of the transformer. At that operating point, these work better with 6600 than 4000 ohms.
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Old 25th October 2006, 12:06 AM   #3
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I'm looking at about 4300
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Old 25th October 2006, 12:08 AM   #4
SY is offline SY  United States
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It'll work well in pentode, but that's a bit low for UL or triode.
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Old 25th October 2006, 12:58 AM   #5
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Sorry if you think this is inappropriate, but I bought the same tubes on SY's recommendation and still am hemming and hawwing about how to use them.

My most recent idea is the following, a 6EJ7/6SN7 Aikido, the idea being that it'll be relatively easy to implement since I think I can cram 2 of the small pentodes into the 1st tube position on one of the Group Buy octal PCB's, plus I already have these tubes. Gain is a little low, only about 30 by my calc, but will it have the oomph to drive these tubes?
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Old 25th October 2006, 10:53 AM   #6
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You may want to put this in the Aikido thread where it will be seen and enjoyed. Nice idea well worth trying. I would love to try it but I don't have any 6EJ7's.

I probably just shot the price of that tube up an ebay.
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Old 25th October 2006, 07:16 PM   #7
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Quote:
Originally posted by burnedfingers
I probably just shot the price of that tube up an ebay.
OK by me, I bought my lifetime supply a while ago.
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Old 3rd November 2006, 03:04 AM   #8
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One thing I don't really understand about these hormone enhanced 6BG6GAs is whether thaey are really high perveyance sweep tubes or 6L6GCs in disguise with a top hat? Is the screen grid high gain like in a sweeo tube? I was thinking of dropping a pair of these in my 6CD6GA enhanced triode SE amp after I have it up and running for a while. From the sweep tube specs it looks like I would be better off using it in standard triode strapped mode due to the higher screen voltage rating, though I would have to completely retune the bias circuit to match the higher sensitivity. I bought a dozen - the price was too low to resist.
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Old 3rd November 2006, 03:09 AM   #9
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These are much more like 6L6GC. In fact, probably identical. The guts and the way they performed in two amps I used them in seem to ape the 7027As that I used to use back in the day.

They are definitely NOT high perveance sweep tubes.
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Old 3rd November 2006, 08:09 AM   #10
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Hi, make a "search" in DIY archives and you'll see that 6L6, 807, 6BG6 are the from the same juice . The bottle may differ , the plate , the cap , the pinnout too , but all of these are the 30'
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