Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: JKRamsey1991 on August 05, 2018, 08:19:05 pm

Title: Transformer Question
Post by: JKRamsey1991 on August 05, 2018, 08:19:05 pm

I have an output transformer that was given to me. It is a Weber 40 watt with 4K impedance. I was thinking of using it in a new 2 6V6 build. If I use it in this build, what impedances would the taps in effect be with the 6V6s? The transformer has 2, 4 and 8 ohm taps.

Title: Re: Transformer Question
Post by: sluckey on August 05, 2018, 08:28:12 pm

Call the secondary taps 4, 8, and 16.

Title: Re: Transformer Question
Post by: JKRamsey1991 on August 05, 2018, 08:29:40 pm

Quote from: sluckey on August 05, 2018, 08:28:12 pm

Call the secondary taps 4, 8, and 16.

Thanks Sluckey! That’s what I thought was the case but wanted to make sure I didn’t have it backwards!

Title: Re: Transformer Question
Post by: shooter on August 05, 2018, 09:47:22 pm

Quote

what impedances would the taps in effect be with the 6V6s?

tube chart I checked;
285plate 8k eff plate2plate
although 250plate = 10k
when you land your Plate volts and tube current, then you might decide to play around n see what's best for you

Title: Re: Transformer Question
Post by: JKRamsey1991 on August 06, 2018, 08:08:37 am

Plate voltage will be higher as I will be using a deluxe reverb power transformer. I just wanted a safe baseline so I wouldn’t kill the OT or the tubes.