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#12
October 13th 06, 05:48 PM
posted to rec.radio.amateur.boatanchors
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SP-600 Rebuilding Experiences
Richard Knoppow wrote: "K3HVG" wrote in message ... I had to change 100% of the micas from a BC-669D. Also, micas in some ART-13s have also gone bad, some near impossible to get to. I don't think many of these components were ever even dreamed of to go this long! On the other hand, my SX-28, apparently in use almost continuously since is was purchased, is still humming (no pun intended!!). Hope I can get away with not doing the RF section...? Worst B/Bs I ever saw were in a National NC-125. They looked like they just dropped out of a bag of spoiled mussels. I suspect the environment has something to do with it. For instance, the BB's in my SP-600 were pretty awful but I found one in a General Radio 1001A signal generatror that looked brand new. I replaced it on general principles but it tested good. -- --- Richard Knoppow Los Angeles, CA, USA I had a SP-600-JX-14 several years ago that came from a Western Electric monitoring station on the east coast. It came with a SPC-10 and a speaker panel. I had been on continuously for 24/7 for many, many years other than for retubing and check-ups. It had "ALL" the original black tubulars. None were split nor leaky. I used it for a couple more years then sold it. I have had twenty SP-600's pass through my hands over the years, most of those black tubulars or gray ones were leaky and/or split open. The enviroment in which it was in and either in use or sitting turned off would also make a difference. In recent years the silver micas are now showing up bad, probably due to silver migration. The avc chain on the SP-600's at this point in time should be looked at closely. Many of them are bad. YMMV |
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