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Hoffman Amps Forum image Author Topic: Hammond AO43 chassis  (Read 2059 times)

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Offline dude

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Hammond AO43 chassis
« on: May 06, 2019, 07:06:14 pm »
Can someone tell me what the secondary is on the OT in that chassis, took two EL84’s. I think it’s 8 ohms but maybe it ran two 8 ohm spk. and it’s 4.
al
If it ain't broke, don't fix it.

Offline sluckey

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Re: Hammond AO43 chassis
« Reply #1 on: May 06, 2019, 07:17:06 pm »
Save this with all your other important computer stuff. Might come in handy. Maybe even right now.   :icon_biggrin:
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline dude

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Re: Hammond AO43 chassis
« Reply #2 on: May 06, 2019, 08:08:48 pm »
Thanks, ran two 16 ohms, it’s 8 ohm sec. what’s that other spk, a tweeter? If so, does that affect the sec impedance?
« Last Edit: May 06, 2019, 08:11:21 pm by dude »
If it ain't broke, don't fix it.

Offline PRR

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Re: Hammond AO43 chassis
« Reply #3 on: May 06, 2019, 08:24:06 pm »
> tweeter? If so, does that affect the sec impedance?

Whatever it is, it has a 1.5uFd cap in series. 1.5uFd won't come down to 8 Ohms until 13KHz, far beyond what you care about.

 


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