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Fender Musicmaster bass amplifier schematics???

7/2/2000 3:35 AM
fopoman Fender Musicmaster bass amplifier schematics???
Has anyone seen these...  
7/2/2000 4:18 AM

Yes there are two versions of that amp. The early one has 6AQ5 outputs and the later version has 6V6* output tubes. Other than that they are pretty much the same. There is a schematic for the 6V6* version on the Fender Amp Field guide (and a photo of my amp) the url is at least I think that's right.  
They are nice little 12Watt amps, at least for guitar, they suck as a bass amp. It uses a small transformer for the phase inverter, that's why there is only one preamp tube. I had a stock CTS speaker in mine that was awful so I put a 10" speaker in it to brighten it up a little.  
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7/2/2000 4:29 PM
Thanks for the info, it's a smaller 12 watt amp.Any more info would be appreciated.  
7/2/2000 4:52 PM

Yes Nathan, both versions are 12 watts. Most of the info about these amps is on the Fender Field Guide.  
7/3/2000 4:58 PM

There's only two differences between the early and late version:  
1: the power tubes--but the 6AQ5 uses the same support circuitry, so it's just a matter of figuring out the pinout.  
2: the power switching arrangement--the early model uses a switch on the back of either the volume or tone control (I forget which, and it's not here at "work" with me...) where the later model has a Champ style slide switch over by the pilot lamp  
C ya,  
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