Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on September 23, 2012, 05:57:45 am
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I've just seen that is possible to find 6L6GC to 807 converters
(http://thumbs2.ebaystatic.com/d/l225/m/msCnVzaFbpFF6oV3tPIiJLQ.jpg)
(http://i45.servimg.com/u/f45/17/15/35/59/807_s_10.jpg)
I've done a bit of research and find some example of the use of this converters
all about HiFi use
Is this kind of adapter useful also in standard 6L6GC devoted guitar amps ?
K
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One potential problem is the 807's 300-volt screen rating, which would likely be exceeded in most amplifiers using 6L6GC's.
Another possible problem is the overall height of the adapter + 807 + insulated top cap.
Other than those issues, it should work fine . . . :icon_biggrin:
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I have used 807's in a bassman clone and in an ampeg clone. They sound great and never give any problems. One amp is running 500+ volts on the plates and close to the on the screens. They work well.
Ernie
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I've just seen that is possible to find 6L6GC to 807 converters
(http://thumbs2.ebaystatic.com/d/l225/m/msCnVzaFbpFF6oV3tPIiJLQ.jpg)
They look like someone's home-brewed piece of t-rubble
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That one were just on the first photo I was able to link
There are others that are more or less professionally build
(http://t3.gstatic.com/images?q=tbn:ANd9GcRVsOMmIMH6tt0FX8X904s93FawFMIcal4Nj7SpMMXaJK26HcZ7)
(http://worthopedia.s3.amazonaws.com/images/thumbnails2/1/0410/13/1_524818a0b88ad831b5127ca0924af58a.jpg)
(http://t2.gstatic.com/images?q=tbn:ANd9GcR9yQnl0QiQyQIezojpxIHP5cfx0mA9Xs3qtUMBdEoBHapKcuI-)
(http://t0.gstatic.com/images?q=tbn:ANd9GcS6dSsxJ5TCUqoZ9LPyJyH2_KiaQpFO75eWufNQmTe4PC7GRgJVOQ)
(http://t0.gstatic.com/images?q=tbn:ANd9GcRKgzuDfUA5ctuU37IEwH0yB1Ha7qfNNRtA-FNtcS3fXRmqPM-YphI6CC6n)
K
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The 807 is taller than most 6L6GC's, even more so once you add the converter base and top-cap.
I'd worry about having room to clear the speaker in some amps, and I definitely wouldn't want to mount them upside-down, as in most Fender amps.
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807 is rated 25W Pdiss, significantly less than 6L6GC's claim of 35W.
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if height is problem, consider the sylvania 5933/807W - they're about 3/8" taller than a GE 6L6GC. caveat: you'll need about another 1/2" clearance for the plate cap itself.
--DL
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807 is rated 25W Pdiss, significantly less than 6L6GC's claim of 35W.
yes, they'll melt in a 6L6GC amp in same bias conditions. tune bias to push down power dissipation? B+ rises tho when you reduce idle current... pembroke corgi chasing it's phantom tail?
IMO, the 807 adapters are a waste of time unless you're going to sub in amp equipped with 6L6G/GA/GB/WGB.
--DL
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Many Thanks to All for answering
K