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Thump noise on the lead in on warped LPs

Hello friends
I have a Mitchell Tecodeck, with a upgraded Garrot Bros P77 cartridge.
I have moved appartments, which means I can turn up the volume a bit, but not that much!!
I have had a bit of a promble, a lot of my mint LP,s were purchased with shwink plastic, and a lot comes with a slight warp(Which I guess is normal)
I have played all above with no prombles, but now seem to have a "Thump" on the lead in track, when the cartridge,arrive to the top, but when the cartridge drops down from a very slight warp, it makes a Thump??, untill, half way thought 1st track, where it settles down
Hopimg some can help
Regards
David
daveyonthecoast

Showing 2 responses by jameswei

jameswei
883 posts
 
I would try to fix the warp.

There used to be devices to fix warps. One remedy used to be to gently heat the vinyl between two sheets of glass in an oven. (Done carefully!)

I have a ring clamp on my VPI turntable which is heavy enough to flatten most warps.

Question: If this thump did not occur before your move, what has changed? Did you change any of your tonearm settings, like stylus pressure? Is the turntable support still level?
jameswei
883 posts
 
It is possible for a cartridge suspension to fail spontaneously after some period of use.

I don't know much about the Garrot Bros P770, but have you looked to see if the cartridge sinks too close to the vinyl?

I assume you would notice if the cartridge body were actually hitting the record, but a faulty suspension could result in poor tracking ability and cause the thump you are hearing even without the cartridge hitting the vinyl.

Do you have another cartridge to try?
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