Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: plexi50 on October 05, 2015, 12:55:21 pm

Title: Gibson GA2 RVT Speaker Impedance
Post by: plexi50 on October 05, 2015, 12:55:21 pm

Does anyone know the output transformer speaker impedance?
I can find no info on speaker or transformer impedance. Schematic does not show it either.

Title: Re: Gibson GA2 RVT Speaker Impedance
Post by: DummyLoad on October 05, 2015, 01:38:58 pm

if amp was equipped with a single speaker, then very likely 8 ohm.


measure OT to be sure.


https://www.youtube.com/watch?v=Yzo3A-NywSs (https://www.youtube.com/watch?v=Yzo3A-NywSs)


--pete

Title: Re: Gibson GA2 RVT Speaker Impedance
Post by: plexi50 on October 05, 2015, 08:39:10 pm

The amp did have a single 15" speaker and i was thinking 8 0hms. But have to be sure. Very interesting video on transformers. Thanks much.

Title: Re: Gibson GA2 RVT Speaker Impedance
Post by: uki on October 09, 2015, 10:46:25 pm

Quote from: DummyLoad on October 05, 2015, 01:38:58 pm

if amp was equipped with a single speaker, then very likely 8 ohm.


measure OT to be sure.


http://www.youtube.com/watch?v=Yzo3A-NywSs (http://www.youtube.com/watch?v=Yzo3A-NywSs)


--pete

That is a very good video about transformers, I've seen it before, this guy gives some good advices and hints !