[Elecraft] K1 for 17/15 question

Thu Apr 29 20:08:33 2004

There's a rumor that Elecraft will offer a 160 meter option in the two band version
sometime in the near future?
I'm waiting for this one!  That will make my K1 convertable
for 160/80 when winter sets in again!
73,
Sandy W5TVW
----- Original Message ----- 
From: "Jessie Oberreuter" <[email protected]>
To: "Mike Morrow" <[email protected]>
Cc: "David Toepfer" <[email protected]>; <[email protected]>
Sent: Thursday, April 29, 2004 3:48 PM
Subject: Re: [Elecraft] K1 for 17/15 question

| 
| On Thu, 29 Apr 2004, Mike Morrow wrote:
| 
| > >The 4 band board is really two sets of two bands where each band set
| > >always has the cap for the the higher of the two bands permanently
| > >switched in, and the lower band cap(s) added when the lower band is
| > >selected (see schematic on-line).  With a little fiddling, you can come up
| > >with a wide variety of configurations.
| >
| > That's true only if you ignore the changes needed to the transmitter output
| > filter networks to accomodate any other choices.
| 
|      Sorry, yes, in addition to the four pre-mix and RF filters, you will
| need to make sure the output filters accomodate your bands as well, and
| this is where the number of options dwindles.  We should, however, be able
| to add 15/17/20/30 to the list of combinations that the board can natively
| support, eg remove C13,C14 and CN,CP, replace C11,C12 and CM,CL with them,
| replace C10 with a 2pf cap, and then re-work the 40/30 low-pass filter.
|      Folks who can get crystals for 10/12 experiements could also come up
| with some useful combinations.  Too bad we can't run cw on 60m :).
| 
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