Tube Amp Archive

Hello. I am trawling around for possible upgrades to my builds. I have just finished my Ampmaker N5X 5w single end amp. Great sounding Marshallish amp, but, as i have it full out at all times with the VVR controlling the WAF (Wife acceptance factor), it is a bit noisy and prone to the vagaries of th...

Will try as above, but found culprit in another place: the new TAD preamp tube was too high in gain, so the distortion made the sound too loose for my taste. Much better control now, tighter. Thanks

Thank You. Great help from everyone. Will put in a smaller resistor and do the maths. I just change it back If I don't like it. Again thanks.

It is 13,2. I am having trouble with different math formulas on the web. I end up with dissipation between 9,77 and 11,2. Maybe not much of a difference. all the math is telling me that I should have a 220 or 230r cathode resistor, and that would give a dissipation of 54-57-60 which presumably would...

Cathode current is at 49mA, screen at 4,25. Plate current is 45mA, dissipation at 9,77. B+ seems to be 245. I Get confused, as per ampmakers instructions, cath. Current is 49, but measuring at pin 8 gives 228v, divided by 270 gives 84. Which is which??

Great advice. Will try not to fry the transformer. Might try to up the dissipation a little bit to 12w approximately. Hope that goes well. Any other advice is welcome. Thanks.

Hi. I am new here, but on my third build. I need some help, as I don`t understand electrics very much. My last build is an Ampmaker N5X 5w. I went directly for the EL34 option (TAD EL34B-STR) and put in a 270r resistor for the cathode. The Cathode cap is 47uf. Dissipation is 9,4w. Amp sounds good, b...