[R-390] R390-A questions

[Cecil Acuff]

Well it sounds like one of the split gears was not tightened properly and 
has slipped far enough to allow it to unmesh loosing it's tension and 
dropping the springs out. (there should be two).  Now it is out of sync.

As far as having to rezero between bands yes that is fairly normal because 
of the aging of the crystals in the crystal deck.  There is no padder to 
correct the frequency of the crystals just to peak the output.  The 
important thing is that each band falls within the adjustment range of the 
zero adjust...if one or more does not the crystal should have been 
replaced...

Sounds like the Pro should get the radio back to get the gear train back in 
sync on the Mhz tuning.  For what you were probably charged you should not 
be having that problem...

Just my 2 cents worth...

Cecil Acuff
WB5VCE
----- Original Message ----- 
From: "Bob Young" <youngbob53 at msn.com>
To: <r-390 at mailman.qth.net>
Sent: Wednesday, July 26, 2006 7:56 PM
Subject: [R-390] R390-A questions


>I just acquired an 390-A, which was done over by an expert, On the third 
>time going through the bands I felt something happen to the feel of the the 
>megacycle change knob, like something came loose. To make a long story 
>short (after a few days) I found that one of the little springs that hold 
>the two large gears together immediately inside the radio had come loose 
>and had fallen out. I found it and reinstalled it but now the first two 
>bands do not work correctly unless the megacycle change knob is tuned lower 
>than the click stop (or whatever you call it). The feel of the knob is 
>definitely not right especially when I go from 1 to 2 megacycles, there are 
>two distinct clicks. A few of the other bands also sometimes need to be 
>fooled with (megacycle change knob rocked back and forth etc.) to come in 
>right. It seems to me that the space where the springs are in between the 
>two gears comes too close together at a certain point and this is when the 
>spring falls out. Does this indicate worn parts? Also is this a major 
>undertaking like it seems it would be?
> A few other questions, is it normal to have rezero the dial between bands 
> with a newly aligned radio? And also is it normal to hear sideband 
> artifacts on strong locals as far away as 10 khz on either side of the 
> station with a 400' antenna no matter which selectivity position is used 
> or was this thing knocked back out of alignment? Thanks,
>
> Bob
> Millbury, Ma
>
>
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390