[R-390] Newbie looking for Calibration Instrument(s) feedback...
Tom M.
courir26 at yahoo.com
Sun Mar 3 20:18:35 EST 2019
David, one more thing.
While operating the receiver, slightly move the MHz change knob while watching the S meter. If the signal improves while you rock the knob back and forth, it could benefit from alignment (on that set of bands). Check each band. If there is no improvement when you rock the Mhz knob, then it's probably pretty good already. This doesn't mean the tubes are good naturally, but points to good mechanical alignment.
Tom
On Sunday, March 3, 2019, 6:16:20 AM CST, R. David Eagle via R-390 <r-390 at mailman.qth.net> wrote:
Hello all,
I have come to the realization that I should try to calibrate my Motorola R-390a since it probably is in desperate need of it. Reading through all of the manuals, it doesn't appear to be too difficult BUT I am lacking some of the necessary equipment to get it done.
I have been looking for a decent signal generator that will work good without spending a ton of money. I have been looking around on Ebay and turn up everything from the Heathkit IG-102's to some new popular Chinese models.
My question to the group - Can I get away with the Heathkits for calibration or is there another popular one that gets the job done?
Thanks again for all the help?
Dave
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