Ron, AC7AC, wrote
It's not a sign of a low quality supply at all, but merely one that has a
transformer in it.
I had major problems with power supplies here a expensive kenwood switch
mode and a not so expensive samlex switch mode gave me magnetic interference
+ a lot of rf interference
Thanks for the info Tom it was a SEC 1223 but i no longer have the ps.
Mick M1MGD K2#4785 K1#1532
G-qrp 11355Arci 12343
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Hi Ed,
It's a Radio Shack 13.5 volt, 1-amp supply. I was using it mainly
for receive and test transmitting, up to about 2 or 3 watts, for
which it worked great with the K1.
For what it's worth, the supply has a good long cord, two of them
actually, about 6 feet of cord from the outlet
Switchers are a different story. And you remind us all the high quality
doesn't necessarily go with high price. That's why I still use a big,
clunky ol' linear supply sitting under my desk. Got enough noise on the
bands already G
Ron AC7AC
-Original Message-
I had major problems with
Well I was too quick when I said I was done.
I've got a problem in my K2 that is really noticable in CW, although
it is there in all modes. When tuning a CW or plain carrier signal,
instead of getting just a single pure tone, there is a second tone in
there modulating with the original
Stephanie Maks wrote:
I've got a problem in my K2 that is really noticable in CW, although it
is there in all modes. When tuning a CW or plain carrier signal,
instead of getting just a single pure tone, there is a second tone in
there modulating with the original one. It makes the CW
That is curious, have you looked at the list archive? I did a quick look and
there are a number of hits that make reference to L30 and magnetic coupling.
Are you doing this on a power supply or a battery?
I think the vco shielding mod also addresses this issue.
Good luck,
was REAL careful
putting the replacement in. Works like a chemp now.
Roger, W1EM
Subject: [Elecraft] Spoke too soon... K2 problem
Well I was too quick when I said I was done.
I've got a problem in my K2 that is really noticable in CW, although
it is there in all modes. When tuning a CW or plain
Adding to what Vic already reported, high-intensity desk lamps are another
cause of that. There's a transformer inside the base! It usually needs to be
closer to the rig than a power supply, but they are usually quite small and
so easy to set within range!
Ron AC7AC
Stephanie,
Vic and Roger already gave you the two best answers for the potential cause.
Check RFC15 with an ohmmeter first (do not depend on a test which checks the
voltage on each end of RFC15 - the voltage can read the same and it still
can be open).
If RFC15 is OK, then start looking for
Ok...what's the Q-code for 'feeling like a dummy'?
Thank you everybody for pointing out the very obvious source of my
problem. I had read about what can happen with low quality power
supplies.
The PS worked great with the K1...so I thought it would be ok with
the K2.
I switched to
Stephanie, VA3UXB, wrote:
Ok...what's the Q-code for 'feeling like a dummy'?
Thank you everybody for pointing out the very obvious source of my
problem. I had read about what can happen with low quality power
supplies.
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I think
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