![]() There are several versions of the Bandmaster Reverb circuit:īandmaster Reverb Valve / Tube Compliments On top of this it deviates from the traditional Bandmaster reverb formula in its use of a hybrid preamp section which utilises 12ax7 tube power alongside a DSP section. It is however largely a different amp as it models the blackface variants of the Bandmaster and adds reverb. The amp was reissued in 2009 as the Band-Master VM (Vintage Modified series), and features many of the characteristics of the original. Power was increased from 40 to 70 watts/ RMS Line Out jack, hum balance pot and an ultra linear output transformer were added in 1977. Master volume models with "pull boost" tone circuit, a Mid control knob for the Normal channel and a tailless amp decal were introduced in 1976. Some later Bandmaster Reverbs also added a 3-band EQ on the Normal channel and a bright switch but this was uncommon across all models. This was complemented by the added functionality of a master volume and a push/pull boost. These changes increased the headroom of the amp and brought it more inline with the non-reverb versions. The output transformer was connected as ultra linear to the power tubes and larger filter caps where used. These series amps offer the designations AA768, AA568, AA1069 and TFL5005.Ī revised model was introduced in 1977 that increased power output to 70 watts. The revised circuit also places the gain stage within the reverb recovery circuit which causes the amp to break up earlier. This resulted in the Bandmaster Reverb having reduced power over the standard model and increased sag and power amp break up. Fender introduced the amplifier with a 5U4GB rectifier tube rather than the diode rectifier found in the previous Blackface Bandmaster. The first version of the Fender Bandmaster Reverb was introduced in 1968 as a Silverface Bandmaster that offered reverb on the vibrato channel. The Bandmaster Reverb was produced in both a 40 watt and 70 watt tube variant, before being reissued as a vintage modified amplifier. It was introduced in 1968 and was discontinued in 1980. It was primarily a Silverface Bandmaster piggyback 'head' with the addition of reverb and vibrato and a modified circuit that shared more similarities with other Fender amplifiers. The Fender Bandmaster Reverb was a tube amplifier made by Fender. No wonder the customer was complaining of weak bass response! Also, some of the caps are 50+ years old, one has sprung a leak (The yellow one), and the paper one has a dimple on the end of the cap that would have soon turned into a leak, and a failed power supply. ** Someone, who did repair work on this at some point in time, replaced the first two (main) power supply filter capacitors with a value that is half of what’s spec’d. This one has old (and failing) electrolytic caps, some kind of extra choke (see last photo below) hacked-into the chassis (even though the choke is not doing anything, as it’s shorted by a wire) wonder what the history on this amp is? In any case, after replacing the electrolytic caps, installing a new, properly-grounded, AC power cord (for safety), and possibly changing the bias circuit from bias-balance-adjust to bias-adjust, I bet this will sound fantastic! ![]() They are a nice amp, 40W, 2 6L6 with tube-driven Reverb and tremelo, what’s not too like? □ I have seen a number of them come through the shop here. Silverface Bandmaster Reverb in the shop! These amps are kind of off the radar of many guitar players. ![]()
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