Don't know if the problem is my Scott LK72-b or

Posted by RSF (A) on March 1, 2015 at 13:27:09

my Ortofon 2M Blue stylus. I didn't know whether to post this in the vinyl or vintage asylum so I posted in both. In the last few weeks I noticed when I play a record the bass isn't what it once was. Everything else sounds fine, It's just the bass. I keep the tone controls flat and I always had enough bass. I now have to have the bass control at 2 o'clock to get the same output. This only happens when I play a record. When I play the FM tuner or cd player the bass is normal. That tells me that amp section, line stage, and tone controls are okay. I thought it may be the tubes in the phono stage, but it isn't. I have several sets of 12ax7's and I tried them all and got the same results. I have a spare 2M Blue cartridge body (no stylus, just the body) and I switched it with the one on the arm. Same results, so I know thats not the problem. I adjusted the vta and that didn't help either. It can get a little chilly in my room. Right now its 52 degrees. I spoke to a couple of people about that and they said the cold temp could affect the suspension on the stylus and once it warms up everything will get back to normal. If that's the case why doesn't this happen every winter. I've had stereos in the same room for over 25 years and this is the first time this has ever happened. Is it possible the the cold temps permanently damaged the suspension and the stylus should be replaced (the cartridge is a little less than 2 years old with about 300 hours) or is there something going on in the phono stage (the amp was fully restored about 4 1/2 years ago) other than the tubes? Could it be a weak cap or a faulty resistor? If I knew it was the stylus I would just buy a new one and be done with it. If I knew of a reliable tech in the Philadelphia area I would let him take a look. With my luck I would replace the stylus and amp would be the problem or I would take it to a tech and he would tell me the amp is fine and it must be the stylus. I don't know what to do. Any help will be greatly appreciated. Thanks.

Bob

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Topic - Don't know if the problem is my Scott LK72-b or - RSF 13:27:09 03/01/15 (11)

RE: Don't know if the problem is my Scott LK72-b or - dadbar 20:32:54 03/02/15 (0)

My worry is your vinyl - Ripple 05:37:03 03/02/15 (0)

Harry Weisfield and other gave you a pretty good answer on another forum. link - viridian 18:01:53 03/01/15 (2)

RE: Harry Weisfield and other gave you a pretty good answer on another forum. link - RSF 19:57:59 03/01/15 (1)

No actually, just like you, rubber ages.... - viridian 20:25:00 03/01/15 (0)

How many hours on the tubes in the phono section of the Scott? /nt\ - Opus 33 1/3 14:55:05 03/01/15 (1)

RE: How many hours on the tubes in the phono section of the Scott? /nt\ - RSF 16:40:53 03/01/15 (0)

RE: Don't know if the problem is my Scott LK72-b or - John Elison 14:29:20 03/01/15 (3)

RE: Don't know if the problem is my Scott LK72-b or - RSF 17:15:10 03/01/15 (1)

RE: Don't know if the problem is my Scott LK72-b or - John Elison 18:26:35 03/01/15 (0)

RE: Don't know if the problem is my Scott LK72-b or - RSF 17:09:10 03/01/15 (0)

Don't know if the problem is my Scott LK72-b or

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