2. amps-preamps
  3. 1341462107

Mastersound Compact 845 with Pvsane 845T

I own a Mastersound Compact 845 and Mastersound PH5 Pre Amp and orderd two Pvsane 845 T Valves.I was advised by the valve supplier that they would work ok as they were the top of 845 range of valves.I was then advised by my dealer that a mod had to be done to the Cathode Resistor on the Compact 845 to take account of the voltage increase.Otherwise the uit could in the future fail.Any body out there using the 845 T in the compact without modification to the resistor should be aware of this .Any comments welcome
patal

Showing 3 responses by brf

brf
1,715 posts
 
Why doesn't someone simply ask Mastersound to provide the Compact 845's operating specs for the 845 tube???? I know of a couple of Mastersound owners who use the Shuguang 845B tube which has the same operating specs as the Psvane 845.

Is the Mastersound Compact 845 shipped with standard Chinese 845 from Shuguang?
brf
1,715 posts
 
The Pvsane 845T is manufactured to the Amperex/RCA 845 standard with a rated filament current of 3.25A at 10V. If your amp uses "standard" 845 tubes, the Pvsane should be drop in replacements. What tubes are in the amp now?
brf
1,715 posts
 
I agree with everything that Phil wrote especially about new caps. I recapped my 845 amp with both teflon V-Caps which once broken in, offer the amp more speed and transparency. I also tried Mundorf M-CAP Supreme Silver / Gold & Oil caps which offer a very organic rich sound without sacrificing transparency. Two different excellent sounding caps, but in the end I kept the Mundorfs.
More to discover