K2 Noise Blanker Modifications

[Ralph McClintock]

Hello,
 Does anyone have any ideas about level and pulse width modifications for the K2 Noise Blanker. My problem is neighbors electric fences and corrals. They were built with aluminum, copper and steel wire intermixed and have over 300 twisted connections. I have replaced the old solenoid type pulser with a solid state unit. The pulsing is not even touched by the KNB2 in any configuration eventhough they are about 40db over 9. I can tell the NB2/LWR position is working but does not do anywhere near what is required. On 160-40 my primary bands of interest it's really bad.
Tnx & 73's,
Ralph   W1ZK     Vermont
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[Sverre Holm]

Did you get a reply to your question?

In case you did not, there were some noise blanker mods for pulse widths a
long time ago. They can also be found on the K2 Mods list, see
http://www.qslnet.de/la3za/K2/mod.html under General mods and KNB2.

73

Sverre
LA3ZA
http://www.qsl.net/la3za/
 

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Ralph McClintock
Sent: 9. november 2004 11:56
To: [hidden email]
Subject: [Elecraft] K2 Noise Blanker Modifications

Hello,
 Does anyone have any ideas about level and pulse width modifications for
the K2 Noise Blanker. My problem is neighbors electric fences and corrals.
They were built with aluminum, copper and steel wire intermixed and have
over 300 twisted connections. I have replaced the old solenoid type pulser
with a solid state unit. The pulsing is not even touched by the KNB2 in any
configuration eventhough they are about 40db over 9. I can tell the NB2/LWR
position is working but does not do anywhere near what is required. On
160-40 my primary bands of interest it's really bad.
Tnx & 73's,
Ralph   W1ZK     Vermont
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[G3VVT]

Hi Sverre,
 
The link to VE3MCF for the mod to increase KNB2 time  constant does not seem
to work anymore. Any other source of the mod  details for suggested values for
C11/C12?
 
Regards,
Bob, G3VVT
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[Sverre Holm]

It works now, so I think it is just the usual qsl.net problems. This is why
I have mirrored my mods list on qslnet.de .
 
Try  <http://www.qslnet.de/la3za/K2/mod.html>
http://www.qslnet.de/la3za/K2/mod.html under General mods and KNB2.
 
 
73

Sverre
LA3ZA
http://www.qsl.net/la3za/
 


  _____  

From: [hidden email] [mailto:[hidden email]]
Sent: 17. november 2004 02:21
To: [hidden email]; [hidden email]
Subject: Re: [Elecraft] K2 Noise Blanker Modifications



Hi Sverre,
 
The link to VE3MCF for the mod to increase KNB2 time constant does not seem
to work anymore. Any other source of the mod details for suggested values
for C11/C12?
 
Regards,
Bob, G3VVT

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Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft   
Help: http://mailman.qth.net/subscribers.htm
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