[Elecraft] ASTRON RS-20A

[Floyd Sense]

In my experience with switching supplies, the problem has been not with
"hash" but rather with discrete unstable signals that show themselves on 160
meters and down into the broadcast band.  I wonder how the MFJ supply is in
that respect.  If you don't have the 160 module in your K2, maybe you can
listen to an AM broadcast receiver in the same room while the supply is
turned on.  My Alinco DM-330MV has a knob on the front labeled "noise
offset".  When you run into one of these unwanted signals, you can turn the
knob slightly and the signal shifts  frequency, eliminating the
interference.   I'm not sure why the current switching supply vendors have
not seen fit to completely eliminate the interference problem - it's
certainly doable.  My old Icom 765 transceiver uses an internal switching
supply and there's not a trace of interference anywhere.

K8AC


----- Original Message ----- 
From: "KXBill" <KXB-1@cox.net>
To: <elecraft@mailman.qth.net>
Sent: Friday, December 05, 2003 2:22 PM
Subject: Re: [Elecraft] ASTRON RS-20A


> Thought I would toss this in for what ever it's worth.  I have several
> Astrons that have taken the back seat for the MFJ 4225MV...They advertise
> this PS as having "No Hash" and I must say, I can not detect any on the
> bands I operate on. I wanted a small, lightweight PS for traveling, thus
the
> reason for the purchase.  I now use the MFJ for all the DC rigs in the
> shack.  Seems to work fine, and I hope, will last a long time.  They now
> offer a smaller PS, <3 amps. Great for traveling qrp operations.
>      I am not a fan of MFJ, however, in this particular case, their
product
> met my needs and I am a happy camper.  What else could I ask for?
> Cheers too all.
> Bill_Harriss_w7kxb_85206
>
>