Space is certainly a factor unless the designer is prepared to employ
shielding, filtering and ground fencing. I believe that construction using
shielded modules has a great deal to offer, and I am not convinced at all
that in the long run the method is 'too' expensive *if* equipment
performance is used as the yardstick. Certainly easier to add options
provided that some system design thinking had been done at the outset.
Small high performance filters in my experience require some form of
shielding between resonators and great attention to leakage past the filter,
but it can be done e.g. 14 pole HF crystal ladder filters with the crystals
side by side in a straight line.
73,
Geoff
GM4ESD
----- Original Message -----
From: "David Cutter" <[EMAIL PROTECTED]>
To: "Geoffrey Mackenzie-Kennedy" <[EMAIL PROTECTED]>
Sent: Friday, January 19, 2007 6:47 AM
Subject: Re: RE: [Elecraft] K2 receive sensitivity
I read about that some while ago but have not come across such receivers.
My guess is that the limiting factor is also governed by space, ie how do
you make a high performance filter fit a small space, vis leakages.
David
G3UNA
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
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
