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Searched all over for copy of whatever manuals might have been available but cannot find anything.

Astron RSM Manual

April 26, As for illuminating the meter, that is a piece of cake. You can login to do that! How to contact Icom America Technical Support: Icom America does answer their telephone for support calls.

Instead, contact your nearest service center! The rs3-5m way to find out is to try it I guess.

If you have grounds on your radio equipment at other places like the antenna, tower, coax you are creating two earthing ground return paths of different capacity and with ever so slight differences in potential. I have seen this happen with a substation where we have this gigantic buried ground mesh.

I had called Astron but mmanual were not very helpful, only saying “it depends” and not offering any rationale.

Astron VS-35M Variable DC Power Supply gets an upgraded MOSFET over-voltage circuit

Contact the site with comments or questions. May 18, Also checked negative side of DC output: April 27, If you can’t find the schematic of the RSM, let me know. These free programs can be found on this page: Dragging up an old topic.


Checked earth safety ground to chassis resistance: If you want to join us and get repairing help please sign in or sign up by completing a simple electrical test or write your question to the Message board without registration. July 31, I provided my serial number and they were able to tell me it was manufactured in May serial: Had a typo above corrected in red.

So, if you do not have any other sort of ground connection on the device you can safety bond the negative return to the earth ground. Not too much in there but you can never have too much info. There are also Battery “BB” versions of the power supply.

While the Astron Linear PS designs have manyal through the years — largely due to changes in electronic components RoHS, obsolescence, etc.

Is this the correct site? Because the ground conductors are also of different gauges wire size the DC return current from the radio is now also going to be trying to share the connection through the earth ground system.

Astroh some new radio amateurs English is a second language, and can better understand some electronics concepts and repairs via video YouTube instruction or pictorial ashron.

Now I’m hoping that older units were built better and this one will last me a good long while. The schematic is really all you need. Also some files are djvu so you need djvu viewer to open them. We’ll see you in a couple of weeks it’s that deep of a bench. There is no preview for this item! If you are not familiar with electronics, do not attempt to repair!


Picked up a used RSM. New to Ham Radio?

Astrpn, do not make a copy of the downloaded manual and do not offer to sell it, just use personally to repair defective appliance! Powered by SMF 1. The only other related thread I found so far is: As for manuals, I wasn’t aware they had one or why a person would need one.

I’m thinking maybe the Astron should be set that way too if iCOM designed their “system” that way. I also thought maybe my meter lights were burned out, as some have noted, but on further searching found that since my unit has a fixed power cord, it’s likely older and never had meter illumination.

The LEDs can be attached many ways, including a hot glue gun. You could suffer a fatal electrical shock!

Maybe I need to try someone else there. Looking for other manual?

Astron VSM DC power supply

If this is something astrin a radio or a piece of industrial process equipment where there are distributed connections to the earthing system then it can introduce problems. I found that site and referenced it above also. It appears you have a handle on operating the unit, even to the point of correcting meter errors. August 14, ,