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previous: Joseph Futral Thanks for the 7199 info. This is p... -- 11/20/1999 5:55 PM

Re: Alamo amp

11/20/1999 10:53 PM
Farrow	Re: Alamo amp Joe, the extra taps on the primary of your OT are ultralinear taps. This is a special OT that is designed to reduce distortion and provide a cleaner signal. Basically you feed the B+ in the center tap, and the plates hook up to the start and finish windings. The screens of the output valves hook up to the UL taps, which are usually wound 40% in from either end of the winding. There was (might still be) a massive thread involving this idea here on AMPAGE... Look for it first, then call Ken Gilbert. He's the resident UL guru (by default.) Many 70's Fender amps used UL outputs, so did some Marshalls (Bass amps mostly I can't remember...) and possibly Magnatones, too. Since it is a bass amp, it's not a bad idea - you can get cleaner output at low frequencies. As for the 7199, it's mostly used as a cathodyne phase inverter and a voltage amp. for same. I'd plug the thing into a bass cab and listen to it before I went monkeying around with it. Our bass player uses a stock '73 Marshall Super Bass 100W and it sounds AMAZING. Farrow http://surf.to/pharaohamps http://www.skybolt6.com

11/20/1999 10:53 PM

Farrow

Re: Alamo amp

Joe, the extra taps on the primary of your OT are ultralinear taps. This is a special OT that is designed to reduce distortion and provide a cleaner signal. Basically you feed the B+ in the center tap, and the plates hook up to the start and finish windings. The screens of the output valves hook up to the UL taps, which are usually wound 40% in from either end of the winding. There was (might still be) a massive thread involving this idea here on AMPAGE... Look for it first, then call Ken Gilbert. He's the resident UL guru (by default.) Many 70's Fender amps used UL outputs, so did some Marshalls (Bass amps mostly I can't remember...) and possibly Magnatones, too. Since it is a bass amp, it's not a bad idea - you can get cleaner output at low frequencies.

As for the 7199, it's mostly used as a cathodyne phase inverter and a voltage amp. for same.

I'd plug the thing into a bass cab and listen to it before I went monkeying around with it. Our bass player uses a stock '73 Marshall Super Bass 100W and it sounds AMAZING.

Farrow
http://surf.to/pharaohamps
http://www.skybolt6.com

Replies:

Joseph Futral Thanks for the info. I did plug it ... -- 11/21/1999 3:12 AM