Hello , I have been having some trouble with rfi and strange impulse noise on RX I have traced it down to a bad power supply . I will be replacing this power supply with another to power my Orion II
Is the power supply in question a switching power supply? Hard to believe a linear pass element type supply would be generating birdies. 73, Don Jones KO7i Arlington, WA Hello , I have been having so
The 35 amp linear Astron supplies used a floating output so they could be used with either positive or negative ground applications. For our use, the negative post of the Astron should be grounded to
Gentlemen - 1) How I know if RF from my Omni VII was causing problems with my Astron RS-35M linear type power supply ? Would it show up as an anomalous readout on one or both meters? What if I had th
1ST CHECK YOUR AC OUTLET GROUND IT MUST HAVE GOOD CONNECTION 2ND. MEASURE FROM THE -13.8V TERMINAL TO CHASSIS, IF NO DIRECT CONNECTION, RUN A PIECE OF WIRE FROM -13.8V TERMINAL TO CHASSIS. __________
The power cable will need to be unplugged from the radio in order for the second part of the check to be meaningful. Phil C. Sr. k4dpk _______________________________________________ TenTec mailing l
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 21 Nov 2010 19:06:09 -0600
Probably as a voltage change, on the internal meter or an external meter. But the time constant may to so short it won't show on a meter. What if I had the model Yes. With a voltmeter in hand, unhook
You do not want to ground loop the Astron 35 Amp supply. Thus, the factory has the negative isolated from the chassis, and it should remain so!!! Granted it is an old design, but read below to see wh
Stuart, I respectfully suggest you consider getting on the horn with Astron to let them know they didn't know what the heck they were talking about. _______________________________________________ Te
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 22 Nov 2010 22:28:43 -0600
The failing in vintage Astron supplies is that the emitter resistors have too little voltage drop to force decent sharing so the transistor with the highest current gain gets most of the load. When i
I would like to return to the original question... What is the "best" power supply for the purpose ? If Astron supplies are not everything they could be... what is? == James -K8JHR == Last I noticed
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 23 Nov 2010 05:16:12 -0600
Most linear supplies come with lousy efficiency, partly from the need for that voltage drop to achieve decent current sharing. Except for my shack supply that uses MOSFETs for regulation. They share
I have been using an Astron 35M for all my shack 12 volt power since 1988. This supply has been on continuously since 1988 except for when I power down and disconnect during lightning storms. The sup
Don't know if Astron supplies are "everything they could be", but have been using the same VS-50M for 23 years now, with no problems until just a couple of weeks ago when the power on/off switch fina
I have had good luck with a cheap Tripp-Lite 25 Amp linear supply I bought at a local surplus shop years ago. Essentially, any reasonably well regulated supply with 13.6 V at 20 -25 A will work fine.
Thanks, guys. I have a RS-35M now, and it work well - AND I am planning on buying a second supply, so these comments are very timely for me. I use the shortest length heavy duty cables between the su