Impala Sal
New member
Hi all,
This is my first post here. I am repairing my son's Bogner 101B amplifier. It was blowing the 5 amp fuse immediately when you turn on the amplifier. First thing is I tested the EL34 tubes just to make sure one was not shorted, but reading up on the amp the 1 amp fuse would have probably blown first since that is on the B+ rail going to the output tubes. We installed a new 5 amp fuse, left the EL34's out, and I plugged in the amp into a dim bulb tester which basically is a 60 watt light bulb in series with what ever is plugged into it and limits the current to about a 1/2 amp. Turned on the amp and the 60 watt bulb lit up at full brightness so there is a dead short somewhere. We pulled the chassis out and five of the 56uf/450v electrolytic filter capacitors in the B+ supply were swollen and a 15,000uf/25v capacitor was so swollen it was about to burst. I told my son, lets replace the capacitors before we go any further and see if that takes care of the short. I'll test the capacitors when I unsolder them. You can see how swollen they are in the attached picture.
Anyway, my question is this, since I didn't pull out the printed circuit board from the chassis yet, does anyone know if the capacitors wires are radial lead or snap in type leads?
Sal
This is my first post here. I am repairing my son's Bogner 101B amplifier. It was blowing the 5 amp fuse immediately when you turn on the amplifier. First thing is I tested the EL34 tubes just to make sure one was not shorted, but reading up on the amp the 1 amp fuse would have probably blown first since that is on the B+ rail going to the output tubes. We installed a new 5 amp fuse, left the EL34's out, and I plugged in the amp into a dim bulb tester which basically is a 60 watt light bulb in series with what ever is plugged into it and limits the current to about a 1/2 amp. Turned on the amp and the 60 watt bulb lit up at full brightness so there is a dead short somewhere. We pulled the chassis out and five of the 56uf/450v electrolytic filter capacitors in the B+ supply were swollen and a 15,000uf/25v capacitor was so swollen it was about to burst. I told my son, lets replace the capacitors before we go any further and see if that takes care of the short. I'll test the capacitors when I unsolder them. You can see how swollen they are in the attached picture.
Anyway, my question is this, since I didn't pull out the printed circuit board from the chassis yet, does anyone know if the capacitors wires are radial lead or snap in type leads?
Sal
