RIAA double cancellation

[Michael_L]

On another slower posting forum, someone replied to a question I had about routing my phono through a jolida then passing it to the phono jacks of my carver preamp/tuner. My question said I had noise, loss of soundstange, imaging and tonal drop off on both the high and low ends of the spetrum.... Would doing as I have done cause this problem and could it introduce intermitent static into the setup?

[hagtech]

Well, you don't want to pump your signal through two phonostages. Sort of makes the other questions irrelevant. Is it you need more gain?

Is the Jolida a phonostage?

jh

[silmaauki]

Not that I could claim that I am an expert on this issue. Don't take my words as a fact.

You did not mention which model the Jolida is and does it go through the phonostage or not on it as well. Anyway the signal which is supposed to be input for any phonostage is very (very) weak compared to the standard signal level between other audio equipment. If you amp this signal (I belive the Jolida is not passive preamp) and only after that pass it to the phonostage the level of the signal could be much too high.

Even if the Jolida would be passive (thus it would not amplify the signal) it would still at least add some capasitance, which could lead to 'malfunctioning' of the whole system.

The generic hint with any phonostage is that keep it as close to the turntable as possible. And do not put anything extra in between those units. You would not gain anything - you would only loose.

[Michael_L]

The Jolida is a JD 9A. It is an active tube phono preamp. The signal from there then goes to a Carver Tuner/Preamp into the Phono jacks there. I was told that this might indeed double the RIAA cancellation, and that I should plug the output of the Jolida into an auxillary on the Carver. I have the Jolida set up to match the specs of the MC XYZ Yatra Cartridge at 100 Ohms and the low level of 800 milivolts for the preamp of the carver. Originally I thought it would have been high voltage or 1.9 volts but this was way too loud and clearly the wrong answer.

[rjm]

This is a forum for DIY, not a general audio support forum. It is not the place to ask how to set up your Jolida preamp correctly.

Connect the Jolida to the AUX input of the Carver, then configure the gain of the Jolida (use either MC high/MC low) to get the desired sensitivity.

/R

[Michael_L]

I did just that it works great, BUT would that not be me doing it myself? I could see if I had said, "Um yeah I had this tech at my house and he did this and that and is this correct?"

Obviously with my threads being moderated by moderators, it did warrant a posting as a valid diy question or do it yourself posting, and being that I am "NEW" to the analogue scene, I figured I would see what other do it yourselfers would do in my particular situation.

For anyone else running into this problem having a moving coil cartridge that is not compatible with a phono stage preamp that is built in to their preamp, when you build your system, if you opt to buy a seperate phono stage preamp, make sure you plug it into the auxillary inputs on your reciever. If you do not you do in effect double your noise cancellation resulting in an undesirable loss of not only noise but pure signal as well. Also be sure to match your preamp voltage accordingly as phonostage preamps require lower amounts of voltage and most auxillary inputs require higher amounts of voltage.

I am now having a great time spinning the vinyl on the Oracle Mk5 with the Graham 1.5t tone arm and the Yatra cartridge doing their thing.