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In Reply to: RE: Atma-sphere M-50 history posted by Ralph on May 23, 2012 at 12:04:35
Strange on the covers - I have had two pair of M-50s and both came to me with the vents as seen in the photos.
At least that is something I can fix.
Anything I should look for in particular that might indicate an upgrade to M-60 Mk 1 status?
If its got the toriod you will see it when you correct the cover. There will also be a mounting bolt head visible on one of the power supply side panels.
They look to still be M-50s, as they have the Sub-Tronics transformers. I guess I need to have a talk with the guy that sold them to me.
It does, however, look like someone has been under the hood as some of the caps look to have been replaced at one point.
The other block has an additional dark blue cap (bottom right one).
That would at least explain why the covers were on the wrong way.
I would consider sending them in for a checkup and possible upgrade, except that I am not willing to ship (they are in too nice shape). As much as I try, there is no more "handle with care" by any of the shippers.
They actually work well now and are stable, so I will probably keep them going this way as long as I can.
Ralph - ever come to the Philly area?
Look great...thanks for the pic....i gess i misset them before
In the bottom photo, I see that the older method of mounting the meter is used. This can result in the meter becoming inaccurate if the mounting is over-tightened. The meter should appear to be a little loose in the front panel. If not, loosen the nuts on the backside to make it so. A drop of locktight or fingernail polish will keep them from moving.
It does look like a cap got replaced in the output section. Otherwise the condition looks great!
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