Quote:
Originally Posted by maninashed
Thanks lads, Ed, I've got a mains tx that will put 450 or so on the anodes, the 807 will take a high voltage. What I need most of all, is the biasing arrangement using a standard type mains tx, ie 450-0-450 6.3 5.0, I'm aware that the concord used a standard tx but the centre tap was lifted from ground to give the bias for the 807. Terry, if you could send me the schematic for that amp I would appreciate it, I can pm you with contact details. Many thanks.
Bill
|
You might might need to ensure a decent bias regulation if deriving -Ve the bias supply from the centre tap of the HT transformer as the HT current draw will vary a lot with push pull O/P as the valves swing between low and high current draw.
Hope this is of some use.
Lawrence.