Re: EF91.....According to the 11th edition of the Avo Valve Data Manual the anode switch setting for the EF91 is 100 volts and the screen switch setting is LF, there's a link to the manual below, it might take a while to upload.....Then scroll down to.......Test Data For Receiving And Small Transmitting Valves......The settings for the two panel tester are given in the columns headed.....AVT Data......The listings start with the OZ4 valve, the EF91 valve is listed on page 75 of that section.
It'll be worth saving that manual.
Hope this helps.
Lawrence.
It'll be worth saving that manual.
Hope this helps.
Lawrence.
