ptrickamp222
New member
- Joined
- Aug 22, 2007
- Messages
- 879
Had to repair the bias pot. Rewire the bias to the hot side of the standby. Removed the wire from the 220k to the rectifier and installed from the 220K bias to the Hot side of the standby. Install a NOS .68 Mustard on V2 cathode. Installed screen & bias resistor's on the power sockets. Blew / shorted one of the .22's off the PT secondary to the filter cans. The big silver cans on the board. Some amps have them removed or not in the circuit. Cannot find .22 electrolytic's but Metro had all the parts and I used Xicon .22uF / 630Vdc caps......Nice, dollar apiece and way better than a electrolytic can. Also bought F&T filter caps but left them out till needed. The Daly's check and sound fine so far. Amp very quiet. Turn on with both volumes up and no noise or static, popping etc. That way I have them and do not have to wait to play this thang!!!! I bought it all original and the bias pot went....ordered and fixed that. Played it for half an hour and when shutting down it just fizzeled out....quit working:bug Found the Shorted .22 Can. Removed and fired up and did a voltage check and all was well:lol Ordered again the parts....just fixed and rebiased the Mullard Xf2's. Took Pic's..........:applaude The 71' is on top and the 72' on the bottom. Marshall cab has 2x12 Celestion Heritage 20 watters and 07' R9 from Vic