Distorted Reverb - Fix or Replace?
Restored an early 210 Sixty Five (with 12AX7 PI), all working except reverb is harsh and distorted sounding. Anyone know a fix, or should I just replace the tank? I think the one in there now is original, but if not...have we determined what tank is the correct replacement - 4FB3A1B or 8 or 9BB2A1B?
Music Man 112RD sixty-five
Two OLP MM4 Silhouettes with Lace Sensors
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6 years 9 monthsMember for
10 years 9 monthsMember for
10 years 9 monthsGot the MOD 4FB3A1B, Problem Solved
Received and installed the new MOD 4FB3A1B tank last night, it is indeed the correct tank for the Sixty-Five amp. Looks to be solidly built, and sounds great at all settings. No harshness, no-over-the top sproing, just plenty of warm reverb wash. Highly recommended.
Music Man 112RD sixty-five
Two OLP MM4 Silhouettes with Lace Sensors
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6 years 9 monthsMember for
10 years 9 monthsMusic Man 112RD sixty-five
Two OLP MM4 Silhouettes with Lace Sensors
Member for
6 years 9 monthsMore on the RD 50 Reverb
Yes, you are correct the RD50 uses the 8BB2A1B and I still have the original tank in my 110RD fifty. It’s a medium delay, I have experimented with a long delay 8BB3A1B, I could not get that exact MOD tank so I bought a 8BB3C1B and with a little soldering I grounded the input to make it a 8BB3A1B. It sounded really good but I have yet to put it in the combo for long term use. FYI the unmodified 8BB3C1B hums loudly in the RD50 due to the incorrect grounding.
Member for
10 years 9 monthsMusic Man 112RD sixty-five
Two OLP MM4 Silhouettes with Lace Sensors
Member for
6 years 9 monthsMember for
10 years 9 monthsMusic Man 112RD sixty-five
Two OLP MM4 Silhouettes with Lace Sensors
Member for
6 years 9 monthsMore on the RD/RP100 tanks.
Earlier this year I bought a “barn find” RD100 head (1981, 6L6 tubes) missing the reverb tank. The screw holes in the cabinet matched a short tank so I decided to fit a MOD 8FB3A1B tank. I found that this tank was also not available so I got a 8FB3C1B tank and grounded the input jack again with a little soldering. The short-tank long delay tank worked beautifully with the RD100 head. This is a viable alternative to the longer 4FB3A1B tank if the original had a short tank.
Member for
10 years 9 monthsSpeaking of Barn Finds
My friends accuse me of running a Home for Wayward Amps and Guitars...and they may not be wrong!
Picked up a nasty, beat-up, dead HD 130 Reverb head a few years back, transformer wires disconnected, no tubes, a real mess.
Turned out someone had removed the insulating board under the main circuit board, so it would short out immediately on power up!
Made a new insulating board, recapped, changed some out of spec components, and retubed. It biased right up and sounded great. Did a full cosmetic cleanup including new repro logo badges from a member of this site.
Came out pretty good I think...
Member for
10 years 9 months
Reverb Tank
I have replaced the reverb tanks on most of my Music Man amps with MOD brand tanks from Amplified parts. If you have the original tank the code should be stamped on it. The difference is night and day.