Re: Telpro C561
Hi!
Replacement PSU and AF Panel design for the OP Chris Field's Telpro C561 now complete and ready to send for manufacturing!
I'll post the Gerber files once I've had confirmation from the OP that it's the correct size!
I've laid it out using original Bradford components, so hopefully everything will fit OK!
Chris Williams
PS!
I made provision on this board for both revisions of the PCL82 Audio Circuit that Decca used in their Bradford chassis, as I am of the opinion that running the pentode anode of the PCL82 direct from the main 300 V h.t. line is far too much for this valve, so included provision for both the main h.t. feed resistor R82 (1k8 9W fusible), the main decoupler C84 (33uF 400V), and the additional screen-grid/triode anode decoupling components R83 (4k7, 1W) and C83 (4uF 400V).
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It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!
Last edited by Chris55000; 10th Apr 2021 at 10:37 pm.
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