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LP-PAN Buffer Modification

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W3cmp

LP-PAN Buffer Modification

Hello:

While sniffing around the LP-PAN website _http://www.telepostinc.com/_
(http://www.telepostinc.com/) I noticed a mod to the K-3 Buffer Amp that
is supposed to improve receiver performance. The instruction information
states that the mod"is not yet an approved mod for the K3. Wayne has
indicated that it probably will be at some point."
Can someone tell me if the mod has been approved or incorporated into
production K-3's? If the mod has been incorporated into K-3's, what is
the starting serial number for incorporation?
Lastly, if someone who has done the mod has made any before and after
measurements on receiver performance, can he or she kindly publish the
results?
Thanks and 73. Chris Patterson W3CMP

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Leigh L. Klotz Jr WA5ZNU

Re: LP-PAN Buffer Modification

Administrator

Is this the mod that improves the LP-PAN performance by giving it a
slightly higher gain?
I don't think it was supposed to have any effect on the K3 RX
performance itself.
Leigh/WA5ZNU

>
> Hello:
>
> While sniffing around the LP-PAN website _http://www.telepostinc.com/_
> (http://www.telepostinc.com/) I noticed a mod to the K-3 Buffer Amp that
> is supposed to improve receiver performance. The instruction information
> states that the mod"is not yet an approved mod for the K3. Wayne has
> indicated that it probably will be at some point."
> Can someone tell me if the mod has been approved or incorporated into
> production K-3's? If the mod has been incorporated into K-3's, what is
> the starting serial number for incorporation?
> Lastly, if someone who has done the mod has made any before and after
> measurements on receiver performance, can he or she kindly publish the
> results?
> Thanks and 73. Chris Patterson W3CMP
>
> __

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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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N8LP

Re: LP-PAN Buffer Modification

In reply to this post by W3cmp

Hi Chris. Just a little clarification. The mod only improves overall
noise figure of a receiver connected to the IF output of the K3, by
eliminating about 10dB of loss. It does not improve K3 receiver
performance. The improvement is most noticeable with the K3 preamp OFF.
When the K3 preamp is ON, the gain distribution limits the degradation
of the loss that comes after it to a degree.

73,
Larry N8LP

> ----------------------------------------------------------------------
> Date: Fri, 14 Aug 2009 10:18:57 EDT
> From: [hidden email]
> Subject: [Elecraft] LP-PAN Buffer Modification
> To: [hidden email]
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> Hello:
>
> While sniffing around the LP-PAN website _http://www.telepostinc.com/_
> (http://www.telepostinc.com/) I noticed a mod to the K-3 Buffer Amp that
> is supposed to improve receiver performance. The instruction information
> states that the mod"is not yet an approved mod for the K3. Wayne has
> indicated that it probably will be at some point."
> Can someone tell me if the mod has been approved or incorporated into
> production K-3's? If the mod has been incorporated into K-3's, what is
> the starting serial number for incorporation?
> Lastly, if someone who has done the mod has made any before and after
> measurements on receiver performance, can he or she kindly publish the
> results?
> Thanks and 73. Chris Patterson W3CMP
>
>
>
> ------------------------------
>