Re: ECC81 with broken glass envelope meets 2 x LND150 transistors
Here's the results from a simple test circuit with sine wave input
DC voltage measurements.
Anode resistor 100KΩ
Cathode resistor 2.2KΩ
HT supply - 200.3
Anode voltage - 161.2
Voltage drop across anode load - 39.1 = 0.39mA
Input 500Hz sine 0.62Vp-p 0.22Vrms (47KΩ grid stopper)
Output (at 0.022µF 400v coupling cap) 19.33Vp-p 6.64Vrms
|