I bought 3A slow blow fuses at O’Reillys auto parts in a pack of 3 or 5? Using in my 800b. Then found original 3.2 amp but saw no reason to change out. Auto parts stores should have.
Well it happened again. I purchased a Fisher FM 100b that had no output. After recapping the mpx and replacing the death cap and replacing bad tubes it is playing. Can cap seems fine. I am waiting on my order from mouser to continue. Thanks Dave for the great thread on yours, I am following your...
Fairly new quad of Tung-Sol 7591’s bias at 323, 332, 319, 317. I’ll take it. AM , FM, Tape Monitor, and auxiliary working. Need to change mpx capacitors. I think I’ll just sit here all day. Thanks you guys.
We have power and music. Tube bias is all over the place now ( tubes provided with purchase) but AM work and auxiliary streaming. Fine tuning to be done but finally I’m feeling relieved. Thanks for the help especially Dave and Larry. You guys help keep Fisher alive.
This is without power tubes. I think all is good. I will check voltages and install power tubes and slowly bring it up tomorrow. I appreciate you and Larry’s help. This is the first unit I bought that wasn’t working. I’m ready but I don’t want to hurt anything.
Ok I had disconnected Can Cap 101 and 102 at all connections. Checked with a DVM and both Cans good. Removed all extra solder and reconnected all wiring. I went ahead and put in 2 new diodes CR3 and CR4. UF4007-E3/73 as I had 6 left over. Now with everything reconnected the bulb ( 200watt GE...
Ok Insulated Can Capacitor ( c102 ) is now disconnected from everything but still in the chassis. Measuring from the positive lug to all ground lugs it measures 213-214uf. Does this mean the capacitor is good or could it still be shorted?
Larry I appreciate your help yesterday. I sure hope you’re right and it’s just the first can because it’s the easiest to replace. Between cutting down dead pine trees and cleaning them up ( 22 dead pines because of the drought) I have to sneak in time to fix the 800b. But my wife can haul trees...