Those St Petersburg Svetlana/SED 6550's haven't been available for some time. I replaced mine with Tung Sol 6550's. Gold Lion KT88's get the job done as well and seem to be well received by most folks. However I haven't heard these tubes with your amps.
Tubes to replace stock in Quad II Forty's amps?
Have a pair of Quad II Forty amps and have decided to retube them in an effort to get rid of some intermittent hums and pops. Great sounding , want to them to sound even better.
I have ruled out GEC 's and such , as money is sort of an issue. Svet's, SED, EH, KT88's , KT90's? Etc.. Ideas. Also, will the brand of rectifier tube(5U4G) make difference in overall sonics?
Lastly, will the input tubes 6SH7 matter in the picture.I been told to suspect these as a source of pops and spitting noises on rare occasion.
Thanks, again. I am new to the world of tubes.
I have ruled out GEC 's and such , as money is sort of an issue. Svet's, SED, EH, KT88's , KT90's? Etc.. Ideas. Also, will the brand of rectifier tube(5U4G) make difference in overall sonics?
Lastly, will the input tubes 6SH7 matter in the picture.I been told to suspect these as a source of pops and spitting noises on rare occasion.
Thanks, again. I am new to the world of tubes.