cartridge output level


Hi all,
This is Marco from Italy, I have a question about how a cart output level relates to volume knob position.

Let me explain: my VdH colibri is rated .45mv@5.7cm/sec, it goes into the mc phono stage of an hovland hp100 tube preamp, no complaints for the sound but the preamp volume knob is often in the 3 o'clock position, and anything below 12 is not enough.

Now this preamp phono stage is quiet enough up to 1 o'clock, above that the tube noise is audible, not to a level to ruin the listening pleasure, but is there.

I would like to be able to play with the volume knob between 10 and 2, the question is, if i could get a new cart, how do I know the correct output level to achieve that goal? I wouldn't want to end up not being able to go beyond 9 o'clock either.

Also, is there a difference in output level at 5.7cm/sec as per VdH spec compared to 5cm/sec of other manufacturers?

I know the simple answer is to try other carts in my setup, but unfortunately that is not an option here.

Any advice for a suitable cart is very much appreciated, I listen to jazz 60%, classical 30%, pop/rock 10%, I like lively dynamic sound with huge soundstage but not dry or too bright.

Thank you all,
Marco
cptaz

Showing 4 responses by viridian

Marco, check the gain of your phono stage and plug the values into this computer:

http://www.kabusa.com/frameset.htm?/index.htm

Go to the left hand side of the page and click on "cartridge gain computer".

My guess is that you will need 1mv to 2mv.

Best,
Marty
Marco, it's really a pickle, 63db of gain is more than enough gain for a cartridge of that output. The line stage gain of 14db is on the high side for a modern design as well. It would not seem that you should need to advance the gain control to 3 o'clock. Are you absolutely sure that the built in SUT is actually in the circuit? Lower impedance loading would give you less, not more output, so this is probably not the answer either. It may be time to drop Hovland an e-mail and see if they have any insight.
Rlawry, I think that you are reading the gain of the preamp incorrectly, he is getting 46db from the phono, 17db from the transformer (total phono gain 63db) and an additional 14db from the linestage, for a total preamp gain through the phono input of 77db. Plenty of output to drive the power amp with this cartridge, I shoud think.
Those Van Den Hul cartridges are bespoke anyway, why not contact the man himself, explain the situation and ask if your cartridge can be rebuilt with a higher output? If you like the thing it probably would be less expensive than buying a new cartridge that you might not like.