09-12-2018, 09:32 PM
Your original post seemed to suggest that you wanted to make a PCB.
David's advice is good.
I assume you're aware that ECL86 is relatively rare and expensive now. If you don't already have them, the PCL86 is much more readily available. All you need to do is supply 13.3V for the heaters, or possibly do a 300mA series heater chain for all the valves fed from a 33V secondary. If you can manage a secondary at or not far above 13.3V you can series wire the ECC83 heaters to make 12.6V and use a small ressitor to drop the voltage.
David's advice is good.
I assume you're aware that ECL86 is relatively rare and expensive now. If you don't already have them, the PCL86 is much more readily available. All you need to do is supply 13.3V for the heaters, or possibly do a 300mA series heater chain for all the valves fed from a 33V secondary. If you can manage a secondary at or not far above 13.3V you can series wire the ECC83 heaters to make 12.6V and use a small ressitor to drop the voltage.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
