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Hi, I own a technics sp10MKII with the crushed volcanic rock base and ep100 tonarm I have used a few different cartridges and currently using a Fulton Diamond. Here is what happends when i dont use the table for a few weeks them play some records it sound wonderfull after a handfull of records the table sounds hard on edge etc...I have adjusted the electronic break so it does not rub
which to me didnt do to much. I also put some 30 weight oil in to lube the bearing everything works like it should.? is there something i have missed. Is there something wrong with my TT
Thanks for your help
Lawrence
Follow Ups:
nt
Thanks guys for the suggestions I will try a strobe disk to make sure the speed is not changing ..the fisher has been rebuilt and the line stage sounds wonderfull no problems there
I am using the little project black box and a dynavector silver stepup before the stage both the fisher phono and the project black box do the same thing....if you should have any other thoughts please give me an email
Lawrenceused-hifi@comcast.net
My guess is you have only one turntable,one phono stage.There was a suggestion the problem may be the electronics which follow the turntable.The preamp,phono preamp.
Have you tried using another turntable(even a cheapie)to find-out whether the problem occurs irrespective of which turntable is used?
My system is very sensitive to warm-up,the unfolding of which manifests as bursts of roughness,cloudiness,lack of bass.
After the warm-up has taken place,these effects clear away completely and in their place step the opposite qualities smooth natural sound,clarity,and great bass.
Try a different turntable or phono preamp,just to rule out suspects.
If everything else checks out OK you could double-check the phono cable assembly. If you have another one try and compare the two.
Regards, Richard
I have EXACTLY your setup- same table, same base, same arm, I presume same power supply.Something is wrong, that's pretty clear. As to why the sound should degrade- I have to say I have never heard that one before. Can you provide some details, such as how long this takes to happen, is that always consistent, etc. Have you used any test discs to check parameters?
Jonathan
Hello Yes it happends everytime i use the TT if i let it sit for awhile say a few weeks and then play some music it will sound wonderfull then after say 3 records the sound goes down the toilet it gets thin hard sounding with what seems a loss of bass fullness ..I have not used any test disks to check.... honestly i dont think that a test disk would tell me anything but i can clearly hear the degration
Lawrence
Most report the opposite, in that the sound improves after a few sides - due to the lubrication settling down with the TT moving.So I would point the finger firmly at the electronics - either of the TT, or the phonostage/preamp...
The TT speed can be verified by an LED strobe that can be build from any number of recipes on t'internet - this will give a better picture of real speed stability.
I would at the very least recap the fisher, and check all the carbon composition resistors against the colour banded value - most will have likely drifted, some by a long way. They should be replaced - at this point, it makes sense to ensure that matched pairs are used for each channel to minimise initial imbalance.
Should there be a stability problem with the TT, then o the same checks on its power supply/controller circuitry - if there are any electronics, the caps and resistors will most likely be well past thier sell-by date.
Have fun
Owen
this is an orignal TT that was in my friends freds house he used it in his recording studio and to test his friend MR Fultons new cartridges etc..looking at the lighted speed indicator it looks very stable
Lawrence
Rick
Rick
...How is your setup? Do you have anything else to compare your vintage cartridges on/to?That 'aint a horrible arm and it is a certainly a good deck.
--
Al G
Born To Tinker!
I have used many different cartridges on this deck they all sound great like i stated but when i spin a few the sound degrades does not matter what cartridge i have on the arm.. :(Any other ideas??
Lawrence
Is it vintage? Has it been recapped?Need more info...
--
Al G
Born To Tinker!
AL for a preamp i am using a dynavector silver step up into my fisher 400cx2 preamp
Many things can cause a vintage tube preamp to act the way you describe.Old wax sealed paper coupling caps (or any 40 year old cap really) can go leaky once warmed up. Marginal 12AX7's? I have experienced your symptoms (sounded ok for a side or two then sucked!) with an Eico HF-85. It was cured through a re-cap job (the tubes tested super). Some of the carbon comp resistors in the phono section were replaced also.
It helped the fidelity all around.
--
Al G
Born To Tinker!
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