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Wave Corrector Users • View topic - New man has trouble with volume and hum
Page 1 of 2

New man has trouble with volume and hum

PostPosted: Mon Mar 17, 2008 10:58 pm
by Andy Parrett
Just got started and I've gone successfully through from start to CD, but I have 2 queries, and whilst the volume one has been discussed here before, I don't feel confident (as a 'plug and play' sort of person) that I've got an answer from it.
ie 1) My line-in volume level is set at zero, yet I still get 'overload'. Not all the time, but there's no latitude at all in the vol. control. Should I get a pre-amp with a vol. control? (The one I bought - £15 - said it was designed specifically for the purpose I'm using it) If so, I'm puzzled that the only one I can find on the web means ordering from the USA (www.phonopreamps.com) - not, of course that that's a serious problem as they are supplied for 240v. Should I alternatively (or additionally) buy the soundcard people are generally recommending - the Audiophile 2496 (the one I have is whatever came with this Dell PC - it says 'SoundMAX digital audio')

Q2) I'm getting hum which shows up at between -18 and -25 on the WC volume meters (greater when I have my main amp switched on for the purpose of connecting the earth from the turntable - do I need to do this?). Apart from the hum sound itself, it means that WC can't find any breaks between tracks and I've put them in manually. How can I get rid of it? (Is it the pre-amp again - I've tried 2 different turntables)

Any advice gratefully received!

Andy

PostPosted: Tue Mar 18, 2008 12:53 am
by Glenn
Hi Andy;

I'm not sure how you would be getting any signal into your soundcard if the line-in volume is set to zero. Isn't that the same as mute? More than likely somebody else will have a better explanation. I don't think it matters which card you use; the 2496 is a good card and it might solve your problem, but you're really splitting hairs in terms of sonic performance.

As for the hum, it is usually caused by either the absence of a ground path or by too many. Have you tried lifting the table's ground lead from the amp and connecting it to the preamp? A simpler approach if it's available is to connect the soundcard line-in to the amp's monitor loop (line out). If your table is connected to it then presumably it already has a phono stage.

Glenn

PostPosted: Wed Mar 19, 2008 7:00 pm
by Andy Parrett

PostPosted: Wed Mar 19, 2008 10:08 pm
by Ray Bell

PostPosted: Thu Mar 20, 2008 1:38 am
by Glenn

PostPosted: Thu Mar 20, 2008 10:30 am
by Derek

PostPosted: Thu Mar 20, 2008 8:47 pm
by Andy Parrett

PostPosted: Fri Mar 21, 2008 6:11 am
by citguy

PostPosted: Fri Mar 21, 2008 9:46 am
by Derek

PostPosted: Fri Mar 21, 2008 4:22 pm
by Glenn
Hi Andy;

The link you provided above didn't reveal anything, but a search for 'hayley preamp' brought up the ebay site that retails the preamp you're using. First of all, I find the lack of a grounding post highly suspicious. I'm not aware of ANY record player setup that can be connected without a ground lead. My guess is this model is intended for a table that has the ground lead integral with the signal ground. So try this: Lift the phono ground from the HK (you shouldn't be using it for ground if you're not using it for signal, anyway) and touch it to the exposed metal sleeve of the rca jack on the preamp (this will effectively couple the 2 grounds). If this removes the hum, then you have 2 options: Either rig the preamp with a ground post, or buy a new preamp that comes with one (such as the Behringer PP400). If this doesn't work, then send it back to Lurch and stick with the HK tape-out connection; it's guaranteed to work.

Glenn

PostPosted: Fri Mar 21, 2008 6:06 pm
by citguy
Hi Glenn. The link I provided in the 2:11 pm message does work and allows a download of the manual for Andys Harmon. The Harmon does provide a ground connection for the turntable according to the manual.
Stan

PostPosted: Fri Mar 21, 2008 11:16 pm
by Andy Parrett
Thank you, Stan, Glenn, Ray & Derek
I'll mull your ideas and suggestions over the weekend. As it's a public holiday on Monday in the UK - and I've taken Tuesday off as well, I should have time to sort this out!
Happy Easter!
Andy

PostPosted: Mon Mar 24, 2008 9:19 pm
by Andy Parrett
Well, it looks as though the answer is simply to use the Harmon/Kardon amplifier!

As suggested, I have tried Turntable to phono on the amp and then tape-out to line-in on the computer. It worked fine with no hum at all, plus the volume problem was also improved. I have also connected my cassette tape unit to the amp (using the AUX sockets) and that has worked OK too (using the same amp to pc arrangement). I have produced two (to me) quite acceptable CDs as a result.

So what is the point of a separate pre-amp? Should that give a better quality signal in some way? I have found the Behringer PP400 and supplier - it's not at all expensive - but would it make any difference?

Otherwise, it seems to me that I just need an external hard drive for my computer (these files are big!) and some Avery labels for printing inserts for CD jewel cases.

Many thanks for your help.
Andy

PostPosted: Mon Mar 24, 2008 10:42 pm
by Glenn

PostPosted: Tue Mar 25, 2008 8:28 pm
by Andy Parrett