...@mailman.qth.net] On Behalf Of Roger Crofts
Sent: 12 February 2013 00:10
To: elecraft reflector
Subject: Re: [Elecraft] P3 generates noise on 144 MHz
Thanks to everyone who responded. With your help, I have already reduced the
noise level from S9+5db down to S6. The receiver noise floor is S3, so I
I've had absolutely no issues with my P3 and a 2m ssb transceiver just
inches from it. This will doubtless be the exception rather than the
rule. There must be something not quite right somewhere.
73 Stephen G4SJP
On 11 February 2013 07:37, Tim Hague m0...@yahoo.co.uk wrote:
I'd be
Thanks to everyone who responded. With your help, I have already reduced the
noise level from S9+5db down to S6. The receiver noise floor is S3, so I still
have a little way to go. There is now no doubt that the P3 power cord is
responsible for most of the noise radiation. Putting the ferrite
I recently installed the K144XV 2meter converter in my K3. I could work strong
stations on 2m with no problem, but weak stations were swamped by noise which
was S9 over the entire band. My P3 was showing that the noise consisted of
carriers every 19KHz with lots of buzzy noise in-between. I
I took special care to ensure all case covers metal to metal connections were
sanded free of paint. I also did my best to route internal coax cables near
the K3 Synth unit modules in a way to prevent least problems. I also use a
ferrite snap on cylinder with several wraps on the 12VDC P3 power
I had a similar problem, Roger, and cured it completely by putting a
ferrite clamp-on on each end of the 12V power cable between the K3 and
the P3. But YMMD
73 de David G4DMP
In a recent message, Roger Crofts ro...@monitorsensors.com writes
[snip]
I could work strong stations on 2m with no
I'd be interested to see the EMC Test Report on the P3, required for selling
into the EU and I think Australia, the P3 should not radiate emissions at this
level and pass EN55022 or similar standards. Perhaps Elecraft could comment
please?. I was thinking of picking up a P3 at Dayton but may
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