[JRC] JST-245 with PSU fault

[Bob Spooner]

Charles,

Have you contacted Universal Radio for the service manual? (I would suggest
telephone rather than email.) They used to be available through them. I read
a message a while ago that said that the switching supplies or the power
amps were prone to damage, and I think that there even were some mods for
power supply transient suppression floating around. It looks like the CW
filters have been discontinued based on Universal Radio's web site:

http://www.universal-radio.com/catalog/hamhf/1550.html

(Of course, you can also use the bandwidth control.) I don't know an
alternate source for filters. I've never seen them listed on ebay, although
I haven't looked very often.

73,
Bob  AD3K

                            Robert L. Spooner
                     Registered Professional Engineer
                       Associate Research Engineer
                  Intelligent Control Systems Department

         Applied Research Laboratory        Phone: (814) 863-4120
         The Pennsylvania State University  FAX:   (814) 863-7841
         P. O. Box 30
         State College, PA 16804-0030       rls19 at psu.edu

-----Original Message-----
From: jrc-bounces at mailman.qth.net [mailto:jrc-bounces at mailman.qth.net] On
Behalf Of Charles H. Brain
Sent: Friday, August 20, 2004 10:52 AM
To: jrc at mailman.qth.net
Subject: [JRC] JST-245 with PSU fault


Hello All,

I recently obtained a couple of JST-245s one working and the other with a
PSU fault. I don't suppose anyone has any ideas as to what is likely to have
gone  wrong! There 
appears to be no cct diagram for the PSU in the user manual I have.

I would also like to get hold of a service manual for this radio and some CW
filters. Does anyone know of a source of suitable filters either JRC or
other makes?

Thanks in hope

- Charles

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