Looking forward to that, as well as test results and listening impressions. Don’t forget to tell what the output transformer impedance is that you used. I asked in post #4; have I missed your reply?
Sounds a lot like some of the test equipment I sold. From R&S & HP.
A lot of that here to standards labs & the military. 👍
he suggested to use 6n6/6H6 as input tube and two 6E5P Russian tubes do drive one GM70 but without any further details.
It make sense to use the GM70 better sound than 845, Russian military quality at $30 each, not commercial Chinese quality at $500 and last a long life.
I would suggest12SN7GT + 6AU5GT(in Triode) as successfull used by Kara Schaffe.
Best Luck.
It make sense to use the GM70 better sound than 845, Russian military quality at $30 each, not commercial Chinese quality at $500 and last a long life.
I would suggest12SN7GT + 6AU5GT(in Triode) as successfull used by Kara Schaffe.
Best Luck.
I bought 300b a long time ago and not expensive - 300b JJ Electronic
http://www.audiodesignguide.com/my/845se.html
The main schematic,but instead of 6SL7 - E55L and load for E55L also transformer, instead of 845 - GM70
transistors high voltage regulator for 1040V,300V,150V
The sound is very good
http://www.audiodesignguide.com/my/845se.html
The main schematic,but instead of 6SL7 - E55L and load for E55L also transformer, instead of 845 - GM70
transistors high voltage regulator for 1040V,300V,150V
The sound is very good
