On Tue, 17 Jul 2007, kk4tr wrote:
Well Guys the Problem was easier than I thought it would be. It seems that when the last person to put the PTO in the R 388 Got everything right EXCEPT lining up the endstop portion of the dial train with the Pto!!! I used a frequency counter as was suggested by one of the guys and discovered that the PTO output was correct just a bit off (2.75mhz to 3.75 mhz) . I just loosened the dial knob on the front side of the PTO turned it 1 turn clock wise and I now have the proper positioning of the of the frequency display on the slide rule readout. All that is left to do is center up the round khz dial and then do an alignment. I want to take this opportunity to thank all the guys especially John and Don and all the others for the valuable advice. Without it I think the radio would still be in the corner gathering dust while I tried to figure out what the next step would be. Thanks very much guys for the help.
Even though there is an R-390 and 390A in the rack, I consistently use my R-388 as my 'daily driver'... a couple of years ago the PTO developed a shorted bypass cap, so I took the opportunity to have the front panel and dial drum re-done by Howard Mills while I got the PTO on the bench and made it happy again. When I re-assembled the radio, I got the Oldham coupler 180 degrees out of phase, and instead of stopping to figure out what was wrong, just slid the dial pointer over to 'correct' the error and put 'er all back together again... of course the mechanical stops took over at the very high end, losing that last bit of travel, and the low end had no stops at all, endangering the PTO... this also slightly misaligns the whole rest of the radio.
So I futzed that back into correct alignment without having to R&R the front panel again... still, it was an easy mistake to do.
Congrats on getting the Old Girl back in tip-top shape - what a great radio it is! I've had mine for over 25 years...
Cheers John KB6SCO DM09fg ______________________________________________________________ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
