2. amps-preamps
  3. 153166-2199

Installed bulk foil resistors in phono amp

I installed four of these Vishay Z-Foil (TX2575) in my phono preamp - the loading and series input resistors on the first triode. Considerable improvement in clarity, image stability and perception of speed. Highly recommended upgrade. PartsConnexion. 4 for $65.

128x128noromance
atmasphere's avatar
atmasphere
11,800 posts
 
Good. What's the input tube?
gs5556
1,234 posts
 
I agree, it’s a very significant upgrade to lower resistor noise and inductance . I removed the resistors in the signal path in my Levinson 20.6’s and replaced them with Vishay VAR foils. 
noromance's avatar
noromance OP
9,769 posts
 
@atmasphere Shuguang Black 12AX7LS. Beats my Telefunkens.
atmasphere's avatar
atmasphere
11,800 posts
 
Yes, I've heard good things about that tube.
A 10K grid stop resistor will give you considerably more RFI protection.
noromance's avatar
noromance OP
9,769 posts
 
I've never really had any issues with RFI. Would the higher resistance not attenuate the signal? Or is it negligible compared to the input resistance of the tube? I see there is a 47k on the grid of the next stage. I'd repace a lot more but it's a very fiddly amp to work on.
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