Topband: Computer noise

[Bill Cromwell]

Hi,

One solution is to use batteries. Charge the batteries while you are 
*NOT* using the radios and noisy power supplies won't interfere (unplug 
those rascals). I am using a combination of batteries and old fashioned 
'iron' chargers. There is no power line crud conducted into my radios 
and no switcher RFI. I began the "all battery" practice when I started 
NDB hunting and 630 meter listening. Lower powered transmitters can last 
a while on battery operation too.

For high output transmitters - well you are on your own. Batteries do 
not seem practical for 1500 watt amplifiers plus the exciter. For 
receive use they are helpful.

73,

Bill  KU8H

On 11/26/19 12:50 PM, Michael Walker wrote:
> I have now tossed all my Amateur switching supplies (almost). The older
> they got, the noisier they got.
> 
> The last one to go was the Alinco DM-330V.   I really liked this as a bench
> supply, but its time has come.
> 
> It was bad on 160M and even bad on 6M.  I replaced it with an old iron
> Astron RS70 that I had lying around and that cleared that up.  Birdies all
> gone.
> 
> However, I did get a 30A SolidState Powerwerx from the office to test and I
> have to admit is is pretty quiet on HF.
> 
> If you really want to be sure, limit you switching supplies and/or have a
> good listen to them.
> 
> Mike va3mw
> 
> 
> 
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