If one is set to use only tubes, then it is fine. It works. But again, it requires an extra 6.3V winding just for the ECL82, because of the need fot elevated heaters. Personally? Not for me 🙂
If you look closely at the 6X5's 6.3VAc supply, you will see the voltage divider, which is the 68K and 100K resistors and goes to the cathode of the 100V zener diode. The ECL82's heaters are parallel to the 6X5 ones. I modified that PS using one 6005 pentode and one 6C4 single triode ( I have many in stock ). It's a good tube-adjustable PS and can be used in many tube preamplifiers that need around 300VDC.
As I said, I have nothing against that circuit. But I prefer solid state for power supplies.
The Aikido noval pcb is finally ready.
After checking the Aikido noval revision A manual, I have noticed that the plate resistors using any tube from the list must be from 1K to 80K. Below the schematic, where there is the part list, there is no resistor ( depending on the tube type) higher than 2K. Isn't it strange? Any info or explanation will be more than welcome.
Please check the attached PDF manual.
Thanks a lot in advance.
Please check the attached PDF manual.
Thanks a lot in advance.
The column labelled Rp in the internal plate resistance of the specific tube not one of the resistors external to the tube. Rk is the column for R2/R4 or R8/R11 which are the cathode resistors.