[Elecraft] K1 for 17/15 question (160/12/10 too)

Fri Apr 30 20:23:51 2004

Yes, someone worked out mod for 160 meters.  Can't answer about 10 and 12!
If you already have a 2 band card you can convert one band to 160.  I didn't do
that because I don't have a 2 band board.  Elecraft advises I can't buy a 2 band
board and just one band's worth of parts.  In other woreds I would 
have to buy the board for say 80 and 40, buy the additional parts for
160, order a crystal seperately for the 160 band in order to build myself
a 2 band card for 160 and 80.  I would have the 40 meter parts "left over"
and still have the aggravation of ordering the crystal for 160.  Soooooo.......
I'm waiting until Elecraft gets around to offering 160 as a band option for
the 2 band kit!
Hope all that makes sense!

73,
Sandy W5TVW

----- Original Message ----- 
From: "David Toepfer" <[email protected]>
To: "Jessie Oberreuter" <[email protected]>; "Mike Morrow" <[email protected]>
Cc: "David Toepfer" <[email protected]>; <[email protected]>
Sent: Friday, April 30, 2004 5:45 PM
Subject: Re: [Elecraft] K1 for 17/15 question (160/12/10 too)

| Has anyone ever worked out the mods required to do 160, 12, and 10?
| 
| Is it possible?
| 
| dt
| .
| 
| --- Jessie Oberreuter <[email protected]> wrote:
| > 
| > 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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