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RE: Full Monkey amps

Posted by Thorsten (M) on November 14, 2010 at 07:41:23

In Reply to: Full Monkey amps posted by Frihed89 on November 14, 2010 at 03:38:57:

Hi,

A 300B "Monkey" is not a big deal, a 211 and 6S33 one can also be done. I'd not try an 845 one, unless running the 845 at low voltage.

The reason there are few "Monkeys" other than 2A3 or 45 out there is that where only build by a small circle of people, who mostly had very efficient speakers and fancies these lower power tubes more.

In many ways the DRD and "Full Monkey" are the same, actually the DRD could be called a "halve monkey".

The name comes BTW from the old "Monkey on a stick" toy and a "full monkey" simply uses a single resistor chain to which all cathodes are returned, the key is to remove the need for the driver cathode bypass capacitor.

Hence any DC Coupled or DRD circuit can be fully monkeyed up...

With a 211 Monkey Amp you can easily drive any Monkey Coffin, while 2A3 & 45 Monkey's are usually limited to their natural habitat, horn speakers. I heard 45 monkeys on AER/Hedlund horns. Not bad at all.

Ciao T
Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

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