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So close to being restored completely. Bell Sound Division 2418 TwR Stereo Tube Amp. Leave a comment
I’ve been working on this amp for a while now. Every foil 0.05 mf total of 8 were bad. Replaced with sprague orange drops.
Can cap C1 a 40/40 mf 350vdc was also bad. Replaced with a 50/50 mf 500vdc.
Can cap C2 20/20/150 mf 350/350/50 vdc was shot replace with a 150mf 250vdc. I haven’t replaced the 2 20 mf sections yet. I don’t have the right caps. They are bad Tom reading 39-33 mf.
Replaced volume pot and re wired leads to it.
All tubes are excellent all 12AX7s from the same 10 pack ge box form 76. 6v6gts all Ken rad black glass. Rectifier 6CA4 is used but strong. All tested for shorts / gas / micromhos with my TV-7 completed with all accessories and documentation. Fully restored.
Have spent hours cleaning it.
Currently, the replacement of the caps has fix a ton of issues. Distortion/Phase issues between channels.
The only issue right now is the left and right Channels are not balanced when pot is in the center and volume is at 50%. The left channel is about 33% higher than the right, turning the balance knob from 12 o’clock to 2-3 o’clock lines both channels up smack dab on top of each other. I was thinking it was an issue when I rewired the pots. However, I can’t rule that out until I replace the can cap with the 2 20 mf 350vdc.