2. amps-preamps
  3. 1229094117

Preamp gain question

I am unable to turn up my CJ PV 10 pre amp up past 9 o"clock. Could the gain be lowered by using different tubes? I have considered using rca attenuators which are advertised to take it down by 10db but I am not sure if this is the way to go.
Also, I am using a Goldring 1042 mm cart (6.5mV output) Would going to a lo mc cart allow me to utilize more of the preamp gain control?

I guess I am trying to find out where my mismatch is occuring.

Everything sounds great but I have no control over low volumes.
zenblaster

Showing 2 responses by eldartford

eldartford
4,262 posts
 
Magfan...All volume control pots these days are log taper. Linear would give ridiculous results. Actually, Log taper is a poor substitute for Audio taper which was used in the good old days. Evidently the low demand for Audio taper pots caused manufacturers to discontinue them.
eldartford
4,262 posts
 
Of course the real problem is too much gain in the phono preamp stage. Attenuation should be done there, not at the output. Some preamps can have their gain easily adjusted with a jumper. If your preamp does not have jumper provision for gain adjustment it can probably be accomplished with a resistor change in the circuitry. Contact CJ.
More to discover