[fyi] new verified Hot Tubes Clone posted at gaussmarkov.net

[johngreene]

Okay...now I think I measured it correctly...I get about 3.6 mA consumption from the Hot Tubes, versus about 1.6 mA from a Tone Bender Mk 3 I happened to have lying around (same battery for both).  I put the DMM between one of the battery terminals and the circuit proper.

I currently have a 1M pot on it for the gain, just because I didn't have a 2M on hand...I don't know if that would make a difference at all.

Chris

Cool, a carbon-zinc 9 volt battery, which has the shortest life, is rated at 400 mAhours. So, the Hot Tubes should get around 400/3.6(say 4) = 100 hours. So the only question would be what is the current draw with signal present, but so far it looks like it would last a reasonably long time on a 9 volt battery.

--john