I've used an Astron RS-35M power supply for about 25 years, that's what I used
when I got my K3-100 #3449. A few weeks ago, the K3 began to shut down in
transmit25 watts seemed to be the magic number...below 25 watts, OK; above
25, dial lights flicker (no error message or High Current
Same thing happened here with that power supply and K3/100.
Couldn't keep the K3 from tripping starting at about 50 watts.
Now using the Astron SS-30 with no problems.
73,
Tony W7GO
On 3/23/2011 5:40 PM, Hunsdon Cary III wrote:
I've used an Astron RS-35M power supply for about 25 years, that's
H,
Have you done the TX Gain Calibration lately? If not, that may be a
first step. Beyond that, I can only guess, and given the information
that I have, that guess may be wrong.
73,
Don W3FPR
On 3/23/2011 8:40 PM, Hunsdon Cary III wrote:
I've used an Astron RS-35M power supply for about
Howdy, H.
Have you checked what your PSU is doing when you try to tx at more than 25W?
Cycle round the options available by poking the DISP METER button and find
the one that monitors your voltage input (it will be about 0.3v below your PSU
voltage because of a protection diode). Watch what
Have you checked what your PSU is doing when you try to tx at more
than 25W?
Check the Astron supply carefully. The RS-35 is a linear supply and
it is susceptible to failure of one/more of the pass transistors over
time, failure of one/more of the rectifier diodes, aging of the current
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