RT503 HELp PLEAAAAASEEEE EASY NOOBISH QUESTION

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raed666

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Hi, I have randall RT503H And would really appreciate your help on this, What is the preamp tubes schematics for this head, I want to use the power amp section with an external preamp, bypassing the head's preamp section using the 4 cable method, the thing is i need to know whcih of the 5 preamp tubes are the phase inverter and the FX preamp tubes, just to remove the other 3 tubes for the Ch.1,Ch.2,Ch.3,,,just not to end up with dead preamp tubes in the head (will this also may hurt my amp)?? Much Thanks!!!!!!
 
You dont need to use the 4CM or frig around with the tubes to bypass the preamp and use it as a power am just run the output of your preamp into the loop return and you'll be good to go, Ive used my RM4 through a bunch of different amps this way.
-MP-
 
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