vintage tube amp, what's the expected load?

Tubes Asylum

Questions about tubes and gear that glows. FAQ

hello fellow inmates.
i have a vintage guitar tube amp "Custom Kraft". 8 inch speaker, but no impedance designation. no schematic. i read on this site that:
"here's a quick and dirty "easy" way which is accurate enough
measure the resistance between the terminals with an ohm meter
multiply it by 1,25
this is close to the impedance "
but the amp is 40 years old and I don't want to assume that it has the correct, original speaker in it.
So, how do I determine what load the OT is expecting?
thanks!
p.s amp has 3 tubes (12au6, 35w4, 50c5)

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Topic - vintage tube amp, what's the expected load? - tequila_mockingbird 14:32:00 09/24/06 (4)

If you want to be anal:) - Russ57 17:28:48 09/24/06 (3)

Re: If you want to be anal:) - tequila_mockingbird 04:35:21 09/25/06 (2)

Power Transformer - Triode_Kingdom 12:08:21 09/26/06 (1)

knack for buying dangerous amps - tequila_mockingbird 12:07:41 10/04/06 (0)

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