[Milsurplus] Harris RF-590A & R-2368/URR Problems

[Peter Gottlieb]

It's odd that BITE passes as a signal is injected for some of those tests.  Are 
you absolutely sure there is a problem?  Band conditions lately have been 
horrible lately and I can't pick up WWV or CHU either.  In the evening can you 
pick up the annoying JT signalling on 5357 USB?  I really doubt anything on your 
power line made it through the power supply to take something out and if a 
tantalum cap were shorted the BITE wouldn't pass.  I've fixed a number of these 
receivers and have a 590A myself.  I don't remember the internal connectors, 
maybe SMB?  Where are you located?

Peter
KB2VTL

On 3/17/2017 5:27 PM, john wrote:
> Just wondering; if there are any Owner's/Users, of these Radios, who might 
> have some 'Trouble Shooting Ideas' for me.
>
> Please allow me to describe the Issue(s); and see what you think or might 
> recommend as a 'starting Point'?
>
> The Issue(s); are Low, Low,  Sensitivity in both Radios...........both Used to 
> work very well and had a very high degree of Sensitivity.  Both Radios Pass 
> the 'Bite' Self Testing on Power Up and there are no 'error Codes'. Prior 
> Functioning of Radios had Signals,  World Wide,  from a 8' Antenna Wire stuck 
> in a Antenna Input Jack.
>
> I have never had these Radios connected to any type of outdoor Antenna.  Only 
> a short piece of wire inserted into the Antenna Input.  Radios have not been 
> operated in any High RF Field; since I have owned them.  They have; however; 
> been continually plugged into AC Line Power when 'Off'.
>
> Very few B.C. Stations are now heard; and those I can pull; quite weak.  Can't 
> pull WWV @ 5mc.; 10mc  WWV very weak.  Not much on 20 meters, 40 meters, or 75 
> meters.
>
> I was going to try and by pass the built in pre-selector.  Thought I had a 
> 'Jumper' for that.  Turned out; I did not; at least not the Right Size.  (does 
> anybody know what size and Type the Internal Coax runs are, in the Radio; 
> between sub Chassis?  (what connectors)?? In any event; I replaced one 
> pre-selector with a Brand new one out of the Package.  No improvement; as far 
> as Sensitivity is concerned.
>
> So; the Question is:  what could possibly be affecting TWO Radios, (that used 
> to work just fine);........Sensitivity wise;  when the only thing they have 
> been doing is plugged into AC Power and mostly turned off?
>
> Batteries on the Control Board do not seem to be leaking.
>
> I do not have ready access to Test Equipment; at my present location.  I can 
> say; that I have tried to use a Millen Grid Dip meter as a Signal source; and 
> it is hard to get a Signal into the Radio using the G.D. Meter as an 
> Oscillator; from 5 ft. away.  So; these Radios; you might say; are basically 
> 'Dead'....................
>
> Does anyone have any Ideas or experience similar to Mine; with these Radios?
>
> I am beginning to wonder if they might have swallowed some sort of Voltage 
> Spike off of the AC Line; that went into the Radios; even though AC Power 
> switch was 'Off'?
>
> I see where there is some sort  'Relay' in the Front  End Input Filter on 
> these Sets; but I only figured that is for Antenna Input Over Load?  Besides; 
> I think this Relay is suppose to 'Self Check' at every power up; and as I 
> related;  Both Radios pass all 'Bite' Testing.
>
> Any Help or Suggestions much Appreciated.
>
> Thank you.
>
> John
>
> ARS K9JII
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