duders -
both of my turn tables are putting out a lot of feed back when i listen to the stereo at medium to higher volumes. when i close the dust cover it goes away, but comes back when volume is turned up. is this something that happens to tts when they are too close to speakers or when the speakers aren't pushed infront of them far enough or what? keep in mind that i'm very new to this field and it very well might be something dumb that i'm doing.
-alvo

The dust covers are acting like giant antennas when their up picking up all sorts of airborne vibrations transmitting them to the table and then through the cartridge. Try removing the dust covers from the table completely when their in use and see what happens.

One other thing to be very careful of is placing turntables to close to a speaker. They do not like heavy vibrations caused by speakers. There are many threads here on isolation boxes. Do a quick search and it should give you a little bit of insight. Good luck and let us know how it turns out

for listening i've moved the speakers out about three feet in each direction, but that puts them in the way of general living so i slide them back when i'm finished. i'd love to post a picture but i need to get a card reader, maybe i'll go do that now. thanks for the mention of isolation boxes, i would have never thought to search for them as i've never heard of them. :thmbsp:

http://img.photobucket.com/albums/1003/bigdan/problem.jpg as you can see, they might be a little close, but before now i never thought that was a problem, the other side has about two feet of clearance.

Yes, the turntable must be isolated both from airborne vibrations (as grumpy stated) and vibrations that can make their way from the floor, up through any support that the table is on, through the turntable itself, and to the stylus.

As a test to see if the vibrations are from the floor, you can carefully lift the table while it is playing and if the feedback goes away, you have your answer.

The stylus and cart. don't care where the vibrations come from whether from the grooves or elsewhere, they will pass them along to the next stage of the amp. chain just the same.

Doug

I love that picture. It could have been taken in the seventies what with the vintage TV and everything. A picture of my place would be very similar :^)

Doug

I wouldn't be surprised if your problems aren't magnified by having the tables on top of the TV, which is probably fairly flimsy, and so resonant. You might help things alot by putting a heavy board or stone platform on top of the TV. Suspended subchasis tables may sound better on lightweight platforms, but mass isolated tables need firm heavy platforms.
I'd also make sure you are tracking at the higher end of the range for your cartridges.

Anything shaped like a box, say a dustcover or a TV will resonate like a speaker box. Put two phone books under one of the tables to see if the TV cabinet is resonating. A dedicated cabinet under your tables full of records will usually do the trick.
The only dustcover I know of that will not color the sound is the one on the SP 10 Technics which is large and very heavy and resonates at 5 HZ. Other than that they need to come off if the table is exposed to high bass spl.

Thanks,
Ron-C

wow, i thought i was doing good by bringing out that old tv to use as a table, its perhaps the most solid feeling peice in the basement. i just graduated from college this fall so i've moved home temporarily, when i move out again i'll set it up right. thank you all.

As some of you know I have been having a few issues getting back into the vinyl thing. Anything from broken TT's arriving in the mail, to TT hum, and to be honest just plain not really being happy with the 'sound". I do have a working Techniques belt drive TT that I have been using initially, and I had a laundry list of complaints(in me head) regarding the whole experience. That is.....untill I came across this thread. To make this short I went home....and...A. did some rudementary speaker movement/placement as in moved them fowards a little more(I already had the forward from the front of the amp) & a few inches wider Then...B. removed the dustcover during playback. Botta Boom Batta Bing.....What a freaking difference. It sounds really good, maybe this Technics TT isn't a piece of crap after all. Man, I'm 41 and haven't owned a piece of vinyl since the late 80's......sorry, but I just couldn't sit on my hands and let you guys have all of the fun, plus I'm always looking for something audio to obsess about. :nutz:

Thanx again for knowing your shit AKers...... :thmbsp:

The easiest way to stay with vinyl is to pick up the SL1200 MKII, new or used these take most of the pain out of spinning. SL1200 Mk parts are dirt cheap because over 3.5 million of these have been sold. Tone arms are like $70.00, spindle assemblies $30.00, etc. If you pick one up used or abused they are cheap to fix and most importantly modify.
Since the basic performance is so high with excellent speed stability and very high S/N ratio, the battle is won before it starts. The adjustable arm hight as the table plays, invented by JVC on their QL series tables by the way, is a big plus as are the high quality controls and the feel they have.
Just my .02 worth!

Thanks,
Ron-C

for thouse of you who love vinal and would like to keep those tunes, try some audio resotration software made by DC6. The CD you will burn them to will hold a whole completer record, both sides in an uncompressed .wav format, leaving you with a mirror image of what the orginal sounded like. Why go to all of this trouble? Listen to the same music on a CD (if you can find it) and then listen to it from a cleaned up piece of vinal. You can draw your own conclusion from there...