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Thanks a lot! I don't know how to repay you for your help

Yes. I’m asking about C cap

Yes ”but the O/P coupling cap should be replaced and increased in value”

I should write this at the beginning that I will use Ampex for home listening. I am using a SET tube amplifier, therefore I will not use the balanced XLR output. In my case, omitting the output transformer makes perfect sense. I am also thinking about installing separate RCA sockets so that...

It will be best if I compare the B repro version with the C version, properly calibrated of course. It is worth omitting the output transformer via the headphone output. I have read that there is a significant improvement. I will also install the input Lundahl transformer in the repro card...

Many users prefer the sound of version B. I wonder why? Maybe because the B version of the card has a slight lack of high frequencies and sounds nicer? Or maybe the rest of the electronics (apart from the reproduce card) decide about the sound?

Thanks again for your help. I have one more question. Can I use reproduce B cards with C transport and electronics? I think that I need to make some modifications to the B repro cards. From what I can see in the diagram, just add an R32 trimmer and replace the R1 1K resistor with 220 Ohm...

Thank you very much for the answer. I read all your Ampex threads and actually I was waited for your post :) I have a few more questions. Can heads from 440B be used with 440C preamp and vice versa? Does anyone manufacture heads for Ampex in this days (Flux Magnetics, Saki, …)?

I'm more interested in whether the 440B transport electronics will work with the 440C preamps. I mean the right connections and voltages.

I have the Ampex 440B transport (4020271-9) in perfect condition with no heads and electronics. A friend of mine has 440C electronics and a head stack for sale from an old Ampex as spare parts in very good condition. Will my 440B transport work with electronics and heads from 440c? Will any...