[Elecraft] K1 Filter Board Questions

[Sandy W5TVW]

----- Original Message ----- 
From: "Ron Ricketts" <ron at wa5vfa.com>
To: <Elecraft at mailman.qth.net>
Sent: Thursday, September 02, 2004 10:34 PM
Subject: [Elecraft] K1 Filter Board Questions


| I have obtained a K1 and have a couple of questions regarding the KFL1-4
| board. Is there any reason it can't be constructed with 80 - 40 - 30 - 20
| meters? If you purchase a new one it comes with 40 - 30 - 20 - 17/15 meters.
| Considering the state of the solar cycle I'd prefer a board with lower
| frequency capability. So is it possible to build a board with 80 - 40 - 30 -
| 20?
| 

NO!  Not without a complete redesign.  It is setup so that more than one band uses
the same set of inductors.  It probably "could" be done, but not without
some problem solving. Best solutuin is to build an 80/17 2 band board.....
OR...As I will soon do, build an 80/160 board.  The 160 meter values have
been worked out, but it's a "do it yourself" project at present until/if
the Elecraft guys make 160 a band option for 2 band board.

| Second question has to do with 60 Meters. Is it technically feasible to have
| 60 meter receive cavility on a K1, assuming the toroids and other components
| aer appropriate to the frequency?

    No, Not even with a 2 band board owing to the filter frequencies used.
If you did it, what would be the point?  No CW operation is legal at
the moment on 60 meters.

73,
Sandy W5TVW