View Single Post
Old 9th Nov 2018, 1:00 pm   #4
John M0GLN
Octode
 
John M0GLN's Avatar
 
Join Date: Jan 2004
Location: Southport, Merseyside, UK.
Posts: 1,156
Default Re: Any info on 10.5V grid bias battery?

Looking in a 1930-31 'Northern Radio and Cycle Supplies' catalogue, there are listings for a few giving higher voltages than 9.5V, Grosvenor has a range up to 24V in 3V steps, Siemens up to 16.5V in 1.5V steps and Ever Ready and Pertrix 15V in 1.5V steps, unfortunately no pictures of the grid bias ones only the HT batteries.

John
John M0GLN is offline