[R-390] R390-A questions

[Bob Young]

I think you and Barry hit the nail on the head. Is this as simple as 
aligning the two gears with each other and then tightening the proper clamp, 
or maybe trial and error, or is this a skilled procedure in which you really 
have to know what you are doing? I am a neophyte when it comes to these 
radios, there are two springs incidently and one does not seem to be in the 
best of shape, are these readily available? thanks

Bob


>From: "Cecil Acuff" <chacuff at cableone.net>
>To: "Bob Young" <youngbob53 at msn.com>, <r-390 at mailman.qth.net>
>Subject: Re: [R-390] R390-A questions
>Date: Wed, 26 Jul 2006 23:02:55 -0500
>
>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
>>
>>
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