Anyone ever us a 6AF6G as a power indicator? - diyAudio
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Old 19th June 2003, 04:23 PM   #1
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Default Anyone ever us a 6AF6G as a power indicator?

I'm was thinking about using a 6AF6G as either a power on or output indicator. Anyone ever done this or have any suggestions on how to go about wiring it either way?
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Old 19th June 2003, 04:48 PM   #2
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Tape recorder schematics should show how to wire up 'magic eye' type tubes. The amp at the centre of the following forum discussion also had an indicator tube wired up as a volume indicator - although it uses an EM80 the 6AF6G would use a similar circuit.

A new fashion tube design!
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Old 19th June 2003, 05:57 PM   #3
Joel is offline Joel  United States
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6AF6 is a dual indicator. Kind of a waste to use one as a fancy pilot light...

Can I suggest that you use it to indicate signal voltage (after the volume controls). The idea would be to have 2 volume pots, left and right channels, and they could be perfectly balanced by using the visual indicator.

Joel
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Old 19th June 2003, 06:11 PM   #4
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Sound like a great idea Joel. I build a Foreplay pre that has left and right volume pots. I'm not new to electronics but I am a tube newbie. In the process of building my first amp - a dual chassis direct coupled 2A3 rig.
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Old 19th June 2003, 09:47 PM   #5
dhaen is offline dhaen  Europe
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Hi,

I totally agree with Joel!
You may as well have it as a level indicator AND it will be a power indicator too!
The schematic'll be childsplay.

Cheers,
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Old 20th June 2003, 09:34 AM   #6
SHiFTY is offline SHiFTY  New Zealand
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I am currently building one EM81 into a stereo design- I am hoping that only using it in one channel won't affect the sound...

I got it tested on a valve tester- looks COOL!

Is your 2A3 the "loftin-white" one by any chance? I think that is a great sounding amp... I built it a while back but prefer to be able to mess around with my tube settings so cap-coupling is the way I have gone.
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Old 20th June 2003, 01:08 PM   #7
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Quote:
Originally posted by ShiFtY
...is your 2A3 the "loftin-white" one by any chance? I think that is a great sounding amp...
It is a modified Loftin-White. I'm putting up a few web pages with lots of pics and the schematic. I'll post the URL when it's done.
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