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Breakthrough from 28MHz to 144Mhz

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Roger Banks

Breakthrough from 28MHz to 144Mhz

Hi All
I was monitoring 144.370 today on the K3 with K144XV module installed when I heard a SSB sideband signal at about S2. Also connected to the rig was a Butternut HF6V for HF.
The signal turned out to be a strong station on 28.370 - the IF frequency.
Anyone else noticed breakthrough to 144 from the 28 IF ??
Roger - GW4WND

John Ragle

Re: Breakthrough from 28MHz to 144Mhz

Roger, et al. ...

I have to confirm observing this on my set-up...there have been
strong CW signals on 10 meters, and they appear through both my
XV144*/and/* my XV432. I first noticed this on my XV432, and it gave me
quite a start to hear European CW signals "on" 432 MHz (don't I wish!!).
Both xvtrs are connected to my K3/P3 combination. This is one of the
downsides of too many spots on the solar disk, I guess............

One (im)pertinent observation: When I noticed this, I switched my
XV432 antenna input over to a UHF dummy load, connected through good
coax and only about 2 feet away. The signals did not diminish in
strength, so they were not coming in through the XV432 antenna input.

John Ragle -- W1ZI

=====

On 10/15/2011 8:18 AM, Roger Banks wrote:

> Hi All
> I was monitoring 144.370 today on the K3 with K144XV module installed when I
> heard a SSB sideband signal at about S2. Also connected to the rig was a
> Butternut HF6V for HF.
> The signal turned out to be a strong station on 28.370 - the IF frequency.
> Anyone else noticed breakthrough to 144 from the 28 IF ??
> Roger - GW4WND
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Breakthrough-from-28MHz-to-144Mhz-tp6895441p6895441.html
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--
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John Lemay

Re: Breakthrough from 28MHz to 144Mhz

In reply to this post by Roger Banks

Hello Roger

I also have the K3 with internal transverter. 10m is certainly lively today
!

I have the P3 as well, and have used this to evaluate the breakthrough from
28MHz, which I find to be between -45 and -50dB. With my HF vertical it
means that a number of 10m signals are audible as breakthrough, but barely
moving the meter.

If I had an efficient HF beam the situation would certainly not be
satisfactory.

Regards

John G4ZTR

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Roger Banks
Sent: 15 October 2011 13:19
To: [hidden email]
Subject: [Elecraft] Breakthrough from 28MHz to 144Mhz

Hi All
I was monitoring 144.370 today on the K3 with K144XV module installed when I
heard a SSB sideband signal at about S2. Also connected to the rig was a
Butternut HF6V for HF.
The signal turned out to be a strong station on 28.370 - the IF frequency.
Anyone else noticed breakthrough to 144 from the 28 IF ??
Roger - GW4WND

--
View this message in context:
http://elecraft.365791.n2.nabble.com/Breakthrough-from-28MHz-to-144Mhz-tp689
5441p6895441.html
Sent from the Elecraft mailing list archive at Nabble.com.
______________________________________________________________
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database 6545 (20111015) __________

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database 6545 (20111015) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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John Ragle

Re: Breakthrough from 28MHz to 144Mhz

Roger, John, et al.

To add further to what I wrote earlier, I DO have a fairly good 10
meter beam, and the "breakthrough" is much less attenuated than -45 to
-50 dB. I don't think this problem has anything to do with the
transverters/per se/, and when I have a chance, I will try disconnecting
the 10 meter beam and capping off the HF antenna input on the K3. I have
a reasonable guess as to the effect of this maneuver.

John Ragle -- W1ZI

=====

On 10/15/2011 10:14 AM, John Lemay wrote:

> Hello Roger
>
> I also have the K3 with internal transverter. 10m is certainly lively today
> !
>
> I have the P3 as well, and have used this to evaluate the breakthrough from
> 28MHz, which I find to be between -45 and -50dB. With my HF vertical it
> means that a number of 10m signals are audible as breakthrough, but barely
> moving the meter.
>
> If I had an efficient HF beam the situation would certainly not be
> satisfactory.
>
> Regards
>
> John G4ZTR
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Roger Banks
> Sent: 15 October 2011 13:19
> To: [hidden email]
> Subject: [Elecraft] Breakthrough from 28MHz to 144Mhz
>
> Hi All
> I was monitoring 144.370 today on the K3 with K144XV module installed when I
> heard a SSB sideband signal at about S2. Also connected to the rig was a
> Butternut HF6V for HF.
> The signal turned out to be a strong station on 28.370 - the IF frequency.
> Anyone else noticed breakthrough to 144 from the 28 IF ??
> Roger - GW4WND
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/Breakthrough-from-28MHz-to-144Mhz-tp689
> 5441p6895441.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> __________ Information from ESET NOD32 Antivirus, version of virus signature
> database 6545 (20111015) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus signature
> database 6545 (20111015) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>