Heathkit AG7 Audio Geneator

[engels]

I'm using one and the power tube have something invisible shaking inside of the bulb, not sure if that's normal - I've thought about changing it. Does anybody have an idea what tubes are inside this thing? The labelled ones are only 6J7 and 6X5, there's total of 6 tubes.

[kevinkr]

Check on bama (boatanchor archive) and see if there is a manual there for it. http://bama.sbc.edu It's not specifically listed so the only place it might be would be in the schematic and spec section of early heathkit products at the beginning of the heath page. Some of these manuals require the deja vu plugin and I don't have it installed, so I didn't go any further.

[Tom Bavis]

AG-8 is there - may be close.

[engels]

unfortunately, there's no AG7 manual on the net.
Also, compared to AG8, AG7 has twice more tubes (6) and costed more.

[kevinkr]

Try A.G. Tannenbaum for a manual - you'll have to pay for it, but it is likely they have it.

[engels]

ugh... I've paid about $35 for it and it works. Do I need to waste another $15-20 to see the schematics? I've thought maybe someone knows what tubes it uses, then I can work out the rest myself.

[Colt45]

I've looked at all the usual suspects, and can't find anything apart from the fact that exists.

if it works, wtf do you need a schematic for? wait until it breaks..

[kevinkr]

Originally posted by Colt45
I've looked at all the usual suspects, and can't find anything apart from the fact that exists.

if it works, wtf do you need a schematic for? wait until it breaks..

Then once it is broken and you are desperate, you'll either have to junk it or possibly spend a whole lot more money to get the information you need to fix it. Better to find the information now - before you need it.

Eventually it is likely you will run across someone who has the information you seek. Have you checked Tannenbaum or eBay?

IMO $35 was a pretty reasonable price for a decent generator, spending a little on a schematic doesn't seem that unreasonable to me.

Another bunch of Heathkit resources, all without the AG-7 unfortunately:

http://www.vintage-radio.info/heathkit/index.htm

http://www.heathkit-museum.com/hvmtest.shtml

There are some forums that specialize in old heathkit gear, try joining one of these..

The AG-7 apparently is a bit obscure...

[anatech]

Hi engels,
I have bought from A.G. Tannenbaum before and they do supply first rate manuals. At least you will be getting all the information including the stuff on how to align your instrument.

I'd buy it, you can't always get your information free.

-Chris

[keithgreenhalgh]

Do you still need to know what tubes are in a heathkit ag7 ? I have one and I will let you know if you still need the info,