[Elecraft] K3: just how wide is it?

[Brett Howard]

Very cool!!  Now I'd be interested to see what those measurements look like
with the general coverage receive board installed to see how much it truly
doesn't affect performance.  

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jack Smith
Sent: Friday, February 08, 2008 6:01 AM
To: dj7mgq at muenchen-mail.de
Cc: Larry Phipps; elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3: just how wide is it?

It's probably too early in the morning for Larry, N8LP, to be up, so 
I'll mention that he has measured K3 RF filter bandwidth data posted at 
http://www.telepostinc.com/K3_Stuff.html.

Jack K8ZOA



dj7mgq at muenchen-mail.de wrote:
> Hi Doug,
>
>> OK...just how wide is the bandwidth when "limited by the K3's BP 
>> filters?
>
> For what it's worth...
>
> A quick and very dirty attempt to "simulate" one of the filters using 
> Elsie 2.12 (free version) gave me in the 10m band filter a -3dB width 
> of roughly 2.7MHz, after some tuning -> 40pF trimmers to 32pF. I 
> assumed a Q of 1000 for the capacitors and 200 for the inductors.
>
> Maybe using Elsie or the AADE filter designer might help give you a 
> rough idea, if you can't do simulations with Spice.
>
> vy 73 de toby
>
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