Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: dude on May 06, 2019, 07:06:14 pm

Title: Hammond AO43 chassis
Post by: dude 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

Title: Re: Hammond AO43 chassis
Post by: sluckey 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:

Title: Re: Hammond AO43 chassis
Post by: dude 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?

Title: Re: Hammond AO43 chassis
Post by: PRR 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.