There are two ways to do it if you want the amp to really get the full benefit of the balanced source:
The first is with a high quality input transformer, which can convert from balanced to single-ended. Jensen is an excellent source for that.
The second is that it happens that any SET can properly receive a balanced signal, and while its reception won't be balanced by definition, it certainly can be differential by definition and so can process both phases of the signal. This is a very minor modification- the hardest part about it is sorting out where to install the XLR connector. The mod won't change the character of the amplifier.
The technique is simple- a coupling capacitor is used to couple the other half of the balanced signal (pin 3, if pin 2 is tied to the grid) into the cathode of the input tube. If the cathode circuit employs a cathode bypass capacitor, that cap will be the coupling cap. If the circuit does not, it has to be added. It really is that simple and works quite well- I've been doing it for years with a set of type 45-based amps.
Refer this to a technician and they will have no troubles doing the hookup.
The first is with a high quality input transformer, which can convert from balanced to single-ended. Jensen is an excellent source for that.
The second is that it happens that any SET can properly receive a balanced signal, and while its reception won't be balanced by definition, it certainly can be differential by definition and so can process both phases of the signal. This is a very minor modification- the hardest part about it is sorting out where to install the XLR connector. The mod won't change the character of the amplifier.
The technique is simple- a coupling capacitor is used to couple the other half of the balanced signal (pin 3, if pin 2 is tied to the grid) into the cathode of the input tube. If the cathode circuit employs a cathode bypass capacitor, that cap will be the coupling cap. If the circuit does not, it has to be added. It really is that simple and works quite well- I've been doing it for years with a set of type 45-based amps.
Refer this to a technician and they will have no troubles doing the hookup.