On Thursday, 29 August 2019 17:56:39 UTC+1, Paul Drahn wrote:
On 8/29/2019 5:16 AM, wrote:
On Wednesday, August 28, 2019 at 11:55:29 AM UTC-4, Phil Hobbs wrote:

Probably intended for a 67 V B battery.

'Ideal' B+ voltage is determined by the specific tube installed.

I built a two tube radio about 20 years ago using 01A tubes. I put 5
regular 9 volt batteries in series to give 45 volts for the radio.
Worked fine.

You know you can plug the 9 volt batteries + to - using the connectors
on top?

Paul

Not a bad idea. They'd last ages too.


NT