![]() (too late, I'm afraid) but I'd like to answer questions helpfully, if I can. I'm relatively "new" here, and I don't want to piss any body off. I guess the biggest risk in buying one is that you would get the AA568 circuit with the ill-fated hybrid bias circuit (and different power transformer with higher voltages throughout). I admit that I wanted to see pictures of a '67 Bandmaster reverb, because I don't believe one exists. So the Bandmaster Reverb is a Super Reverb in a head cabinet. It's a tough question, and in the end my personal belief is an amp, (or anything else) is worth whatever someone will pay for it. Features Fender Bandmaster and Bandmaster Reverb, 40 Watts Physically, parts were designed to look similar to original factory units (where possible). The big question these days is the amp worth more in "original" condition, or 'repaired" into something usable? ![]() Coupling caps can go bad and also will affect tone. It's important to change electrolytic filter caps, and they may not affect tone, but electrolytic cathode bypass caps "may" affect gain stage and tone particularly. Coupling caps usually only get replaced if they're leaking.I have to edit my post. Original electrolytic caps or coupling caps (or both)? Original electrolytic caps need to be replaced regardless of tone. The BMR would sing more happy up loud with the recto tube, but the BMs bottom end was a good deal tighter, so in the end as always its comes down to what your playin style and ears want ! swapping in a 5AR4 recto in place of the 5U4GB would get you up to 38 watts. My 67 BM with good outputs(7581s) and biased at 29 ma will top 40 watts rms, the last BMR I had on my test rig could only muster 33 watts RMS with the same tubes. The BMR parts wise other than the recitfier tube and the PT with a 5 volt winding shows just about the same voltage ( by the schematic) on the plates of the output tubes as the non-verb BM, yet the BMR preamp tubes by what the schematic shows printed on it only shows 230 volts at the 12ax7s, while the BM shows 260, yet none of the resistors that would need to be different to make this happen are different! I will tell you one thing, other than the effect of the rectifier tube at high volumes in the BMR producing sag you sure can not judge the difference in sound between these two amps by just the schematics!
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |