ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

previous: Carl Gigun Luckily there's no one and only "Co... -- 10/1/2004 12:32 PM

Re: Should speaker impedance be halved when using 6L6s i

10/1/2004 3:34 PM
Mick	Re: Should speaker impedance be halved when using 6L6s i Hey all, What Carl said is correct. There is no absolute output impedance for vacuum tubes at least for what we are after as guitar players. The recommended plate impedance that a manufacturer suggests is a "best case" trade-off between output power and distortion. Varying the load impedance that the tube sees within a reasonable amount will affect distortion content but may not hurt output power too much. You need to looks at the load vs. distortion charts for a particular tube. The RCA Radiotron Designer's Handbook has some good info on this. Mick

10/1/2004 3:34 PM

Mick

Re: Should speaker impedance be halved when using 6L6s i

Hey all,

What Carl said is correct. There is no absolute output impedance for vacuum tubes at least for what we are after as guitar players. The recommended plate impedance that a manufacturer suggests is a "best case" trade-off between output power and distortion. Varying the load impedance that the tube sees within a reasonable amount will affect distortion content but may not hurt output power too much. You need to looks at the load vs. distortion charts for a particular tube. The RCA Radiotron Designer's Handbook has some good info on this.

Mick