Whoops made a typo: should read 4644.999 Khz. crystal. John
VK2IFT From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of John Brown Sent: Tuesday, 5 June 2012 2:32 PM To: Drake List Subject: [Drakelist] Crystal Folks, I am in the process of restoring an R-4C and I am having difficulty getting the Carrier Oscillator stable. It seems to drift from about 400hz below 4645khz up to 450Hz above and anywhere in between over time. It really should stabilise quickly +/- 50Hz after turn on. The power supply to the oscillator is clean and stable. The oscillator is part of the "mode" switch assembly and would have to be removed to get to the electronics. So I guess the drift issue could be attributed to any of the components and /or the crystal. So before I commit to pulling this assembly apart I am wondering if there is a possible supplier for the 4654.999 crystal? I figure if I am going to do this I should at least have a replacement crystal in hand. Any ideas on a crystal source? Thanks John VK2IFT
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