Bellari RP 503

[Bow]

I am picking up a Bellari RP503 to mess with.

I have been see references to modifications to these on the internet, but I have yet to see that actual mods listed anywhere.

Does anyone happen to know the mods, or where to find them?

Thanks

 

[Bow]

Update:

I recieved the Bellari RP503 Tube Channel Pre.

It has a SovTek 12AX7LPS running 137V on the plates (measured by me).... not to bad at all...

I ordered some upgraded op Amps to replace the ROHM BA4560s...

Here is what my Old Rack sounded like with the Behringer VX-2000 Ultra Voice Pro:

This is the Rack with the STOCK Bellari RP503 Installed:

And Finally the Bellari RP503 after I modified it. I dropped in National Semiconductor LM4562s (U3, U4, U5) and LME49720s (U1, U2)... and swapped the tube to a JAN GE 5751...:

I realize there is quite a bit of Hiss, I had a cieling fan going and I turned off the noise gate.

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