noise blanker ineffectual

[Roland Whitsitt]

All the indicators say the noise blanker is functioning, I mean it says it's on, but I really don't hear any difference at all.  Can't tell a thing. It certainly isn't as good as the ft920.  So I'm wondering if maybe I wound the toroids to tight.  The first time I wound them the wrong direction.  When I re-wound them with the same wire, I came up with an inch or more extra wire.  Would this make a difference?  Should I re-do them with fresh wire?
I'm sure this has been discussed lots before, but I haven't found the thread of it yet in the archives.
Thanks,
Roland
PS. . . And thank you Charlie W0YG for the hand mic!  That was quick!
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[Don Wilhelm-3]

Roland,

The tightness of the toroid windings will make no difference - the important
thing with toroids is that they have the correct number of turns, and not
much else matters - even the winding direction does not matter electrically.

The K2 noise blanker is more effective on impulse types of noise - like
ignition noise.  In many reports, it knocks out impulse noise better than
the NB in other some other rigs, but there are also many reports (like
yours) that the K2 NB is not effective on a particular type of noise which
is killed by a NB in some other rigs.

There is a mod to increase the blanking time which some folks have found
works better on the types of noise that they encounter.  Look at
http://www.qslnet.de/member/la3za/K2/modAny.html#KNB2 for additional
information.

73,
Don W3FPR

> -----Original Message-----
>
> All the indicators say the noise blanker is functioning, I mean
> it says it's on, but I really don't hear any difference at all.
> Can't tell a thing. It certainly isn't as good as the ft920.  So
> I'm wondering if maybe I wound the toroids to tight.  The first
> time I wound them the wrong direction.  When I re-wound them with
> the same wire, I came up with an inch or more extra wire.  Would
> this make a difference?  Should I re-do them with fresh wire?
> I'm sure this has been discussed lots before, but I haven't found
> the thread of it yet in the archives.
> Thanks,
> Roland
> PS. . . And thank you Charlie W0YG for the hand mic!  That was quick!
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[Roland Whitsitt]

Thanks Don, I may try that one soon.  I am about to start on the SSB module
now.  So get ready for another round of stupid questions. hi hi
Roland in Stockton
N5VWN/6
----- Original Message -----
From: "W3FPR - Don Wilhelm" <[hidden email]>
To: "Roland & Elvie Whitsitt" <[hidden email]>; "elecraft"
<[hidden email]>
Sent: Sunday, August 14, 2005 6:26 AM
Subject: RE: [Elecraft] noise blanker ineffectual

> Roland,
>
> The tightness of the toroid windings will make no difference - the
> important
> thing with toroids is that they have the correct number of turns, and not
> much else matters - even the winding direction does not matter
> electrically.
>
> The K2 noise blanker is more effective on impulse types of noise - like
> ignition noise.  In many reports, it knocks out impulse noise better than
> the NB in other some other rigs, but there are also many reports (like
> yours) that the K2 NB is not effective on a particular type of noise which
> is killed by a NB in some other rigs.
>
> There is a mod to increase the blanking time which some folks have found
> works better on the types of noise that they encounter.  Look at
> http://www.qslnet.de/member/la3za/K2/modAny.html#KNB2 for additional
> information.
>
> 73,
> Don W3FPR
>
>> -----Original Message-----
>>
>> All the indicators say the noise blanker is functioning, I mean
>> it says it's on, but I really don't hear any difference at all.
>> Can't tell a thing. It certainly isn't as good as the ft920.  So
>> I'm wondering if maybe I wound the toroids to tight.  The first
>> time I wound them the wrong direction.  When I re-wound them with
>> the same wire, I came up with an inch or more extra wire.  Would
>> this make a difference?  Should I re-do them with fresh wire?
>> I'm sure this has been discussed lots before, but I haven't found
>> the thread of it yet in the archives.
>> Thanks,
>> Roland
>> PS. . . And thank you Charlie W0YG for the hand mic!  That was quick!
>> _______________________________________________
>> Elecraft mailing list
>> 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
>> Elecraft web page: http://www.elecraft.com
>> --
>> No virus found in this incoming message.
>> Checked by AVG Anti-Virus.
>> Version: 7.0.338 / Virus Database: 267.10.8/71 - Release Date: 8/12/2005
>>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.338 / Virus Database: 267.10.8/71 - Release Date: 8/12/2005
>

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