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I'll try the TAD and sound a little muddy, a little too big, not for me. I'lll try also the Svetlana C logo, but with that bias current are really hot. I'll still search for Nos tubes with a acceptable price

to my taste, the best that i have tried are weber thames, also with marshall. I have tried also a cab with vintage greenback, but i don't love it with hiwatt, g12h are not bad. There is also weber fc12 that are inspired by fane crescendo, sound really good for soloing very dark sounding, big, for so...

I have finally read all those post on that thread and so... I will experiment !

Great! I know that also big tube PA System of tens of thousands Watts for their shows!

I have used it under a DR103 and sounds good , also tried a DR103 into single G12H 30w cone and sound good also at high volume

Thank you :) I saw this layout on this forum http://home.comcast.net/~going2spain/hiwatt/CP103_preamp.pdf i saw that it's based on Pete Townshend Early Cp103 present in the MKHuss' site gallery, what's the better ssounding from this and the early 70 schemes of Mkhuss CP103? :) the schemes seem to be...

Someone have a CP103 layout?

Who is King's Ransom?

Thank you

I would imagine it would be possible to wire a direct in to the power section, but....why do you ask? Are you trying to tandem guitar or bass amps or really use a 100w tube amp for PA? Even the Grateful Dead gave up on valve powered PA Systems ;) . Dave eheheh :) i want to try a fender bassman pre ...

Is it poissble to mod an Hiwatt DR103 to use it how Slave PA only?

The life is hard many times...

TedB plesase with 1M linear pot whats the range of the Grid Voltage that you can set? It run linear from -38 to -45 or almost to -45 at starting rotate the pot? Thank you, Daniele

i'll test it with the TAD EL34B STR to experiment something new

Thank you :) So i measured plate volt. = 420V plate current for each tube= 36/37 mA grid negative voltage = -35.2 the bias current would be 0,7 x25 /420 = 41 mA or it's good as i have measured? Top values obtained with voltage selector in 245V, here we are we have 230v at the walls. I repetead it wi...