Perhaps the transformer screws are loose and when you turn it upside down the chassis no longer vibrates in sympathy with the transformer.
Dennis AE6C On Wed, Apr 14, 2010 at 3:49 PM, Garey Barrell <[email protected]> wrote: > Probably a bad solder joint on the filter cap. > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs > <www.k4oah.com> > > > > Charles Ring wrote: > >> My 2-C, which I bought new in 1968, suddenly developed a very loud buzz >> which is there, unchanging, no matter what position any controls are in. >> Suspecting the main filter cap, I took the bottom cover off and turned the >> receiver upside down, turned it on and the buzz was gone. I could not >> provoke it to come back. So I reassembled it and it worked fine for a few >> days, but now the loud buzz is back. I'd expect a bad electrolytic to stay >> bad. Is there a known cause for this behaviour? I have the manual with >> schematic. >> >> 73 de W3NU >> >> >> >> > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist >
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