Good impedance match for Precision Fidelity C-7AR

Almarg,
The speakers are Joseph Audio RM-25iii (86.5dB), Grace 707/Grado Sig 8MX cart(4.5mV) and the amp is a Michaelson & Austin TVA-1 (100Kohm input), Grover Huffman IC's between PF and TVA-1 amp with AntiCable speaker cable. The pots on the PF are noisy, and are original circa '81 vintage; is it possible the dual potentiometers have deteriorated and now present substantial resistance in their rotation?

Viridian/Georgelofi,
I have the Rothwell attenuators, and while they do provide more rotation on the volume control, they also take away some of the high and low frequencies. It does act more like a gain problem, but the VC may also be a culprit. The next step may be to check the Alps VC's out thoroughly. Thank you for replying.

Ghosthouse,
Thanks for replying. I will try using them on the inputs in varying places. I appreciate the suggestion about Harrison Labs attenuators, and I may try those, also. It may be that the gain needs to be lowered in the tube stage before the passive stage, and output.

Almarg,
Thank you very much for your excellent reply, and especially for taking the time to do the measurements. I will definitely try cleaning the pots before I consider replacing them. The Grado Sig 8MX can also be replaced with a lower output cartridge, and fortunately there good choices available at a reasonable price. I really do appreciate people like you taking the time to share your knowledge with thoughtful answers, as that is what keeps this community of audio enthusiasts going. Thanks again, and I will let you all know what I find out in the coming days.

Follow-Up:

After checking, there was one large high voltage capacitor which was leaking a small amount, and, after replacing and breaking in the replacement for a few hours, the PF is back in fine operation once again. Thank you to everyone who contributed to the discussion, I appreciate your very helpful comments and efforts.

Pix4work