Jul 17, 2013 #1 T tomasz1000 Newbie level 6 Joined Jul 2, 2012 Messages 11 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location Poland Activity points 1,371 If you do, please tell me what fT you measured vs what anode voltage.
Aug 29, 2013 #2 J jiripolivka Advanced Member level 5 Joined May 21, 2010 Messages 2,831 Helped 832 Reputation 1,662 Reaction score 803 Trophy points 1,393 Location Santa Barbara Activity points 22,010 I have not tested ECC83 at a high frequency but ECC 81 being similar can oscillate at more than 500 MHz. I never tried to vary the anode voltage, so you should run a test.
I have not tested ECC83 at a high frequency but ECC 81 being similar can oscillate at more than 500 MHz. I never tried to vary the anode voltage, so you should run a test.
Aug 29, 2013 #3 A albbg Advanced Member level 4 Joined Nov 7, 2009 Messages 1,307 Helped 448 Reputation 898 Reaction score 409 Trophy points 1,363 Location Italy Activity points 9,957 It seems spice models of many tubes (also ECC83) are available at the following link: https://www.vcu.edu/csbc/bnfo601/Paul_amp_designs/Koren_Tubes.inc You can simulate the frequency behaviour. However I didn't try these models and I don't if they work properly
It seems spice models of many tubes (also ECC83) are available at the following link: https://www.vcu.edu/csbc/bnfo601/Paul_amp_designs/Koren_Tubes.inc You can simulate the frequency behaviour. However I didn't try these models and I don't if they work properly