So, the amplifiers at work for our balance that was built in the mid 1940's are run by vacuum tubes. No big deal in that they give a decent amplification of the analog signal to the motors that drive the balance. Problem is, the tubes are getting harder and harder to find. I have a source through a music store for a couple of them that are the same as electric guitar amps. However, one in particular is only available as Russian Surplus. Add to that the fact that the motors used in this beast haven't been made for years and are no longer available. We tried to get a shop to rewind them but the answer was NO from several shops.
So part of the problem is availability of replacement tubes, part of the problem is availability of replacement motors and part of the problem is finding someone who can actually work on the amps. I am tired of dealing with them myself. the old boss was good with them but he is gone now and I am the person that has the most knowledge of them around here now. SCARY!
Sorry, just venting. Did I mention that the room the balance is in is temperature stabilized? Being Texas, it is stabilized at a "warm" temperature so any prolonged troubleshooting involves a profuse amount of sweat. I now offend myself!
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