While I had the tape board out, I performed other maintenance steps that I felt might make the warbly treble note problem go away. Cuz it is easy, swap the 6V6es and see if it follows the tube. I'd love too find some Transonics cheap. I flip older stereos, cameras, and other audio equipment. That cab looks like pine? I went in to that particular goodwill and there was nothing of value on the shelves. Replaced filter caps and ended up just rebuilding the main board.
They may have archives of old schematics. It has to be one of the best single-ended amps i've ever heard. It appears that I see a '65 date code on yours. Is the fading out trem most likely due to leaking caps? These were hand made back ni the day, with parts assembled on 2 or 3 seperate plates of metal. I recently picked up an M88 1957 model of the Rickenbacker amp.
I was going to recover it but people have told me if your sell it,, keep vintage. I'm looking for a schematic. This amp isn't as loud as the Bronco, but it seems to stay a bit cleaner with a bit less flabby bottom end. My '69 Bronco seems to max around 8. Does anyone know where I can get a schematic for this amp? Mine has the tone control plus the 6v6 12ax where the m8 has a dual 6v6 tube setup.
If it is noisy, I flip the plug. Drew up a schematic but would appreciate input from anyone willing to look it over. Otherwise, there should be one around somewhere, those amps aren't as rare as you would think, there are a ton of them in circulation though few in use, they are sorta obsolete , so I'm sure more than one person has blueprinted them. Does your Rickenbacker have a real quick curve on the volume and tone pots where almost all of the action is within a small portion of the throw? Some flip at swap meets, others on ebay or yard sales. You can see the knotholes staining through the silver tolex on mine.
Seems I have one of the first versions of the M88. B-9A The first B-Series were mid-sixties amplifiers. The grill cloth appears to be orignal even though the reverse side of the grill cloth is very similar to Fender grill cloth except it is brown and gold instead of silver and black found on Fender amps. Original black industrial crinkle paint - dusty from storage. They may have archives of old schematics. I want to return this amp to it's original circuit. Its a very warm sounding amp, almost tube like.
Sounds great, works great and is very loud. Maybe that's not true or maybe the chassis was left over and the amp wasn't finished until '65 assuming the speaker is original. It also looks like just the cathode bypass cap has been replaced. Here's a few pics to give you a taste of what 17 hrs of work will accomplish. I couldn't find one on the net I'm sure you did the same. You remember how constant current helped in the case of bootstrap? There are so many flippers out there that I can't even break even at it. It fades in and out.
Sold as-is due its vintage nature. I still need to open it up. I suppose a search of Schematic Heaven would answer that for me. It sounds great and is a little bit louder than I expected. M-16 Supersonic Predecessor of the 1960's B-16, here is a superb example of this 40-watter in tweed clothing: These were used by country artist , here with his Blue Boys in a well-known picture. ~1M or more so will replace those too and go from there. So you have too many friends in your neighbourhood? I see that they have schematics available for download on the site, and the M88 isn't there.