K1-4 -- No 30m band during initial tests

[KB3OKS - Mark]

Hello all,

I'm now a bit further along with my K1-4 build, and I just installed
the VFO toroid (L1) on the RF board, fired the radio up and adjusted
the winds to match the desired range. Shortly after that I was
switching through the four bands as instructed, and I noticed that my
radio is showing the following four bands: 40m, 20m, 17m, 15m ... **no
30m, and both 17 and 15!** (specifically, it displayed 7 MHz, 14 MHz,
18 MHz, 21 MHz).

The first thing I did was re-check the crystals on my filter board
very carefully with the K1-4 filter board manual. All are correct, in
their correct respective spots, grounded, and I made the right crystal
selection for 80kHz tuning.

I then checked resistance again across the IC (U1). Everything looked
good, though a couple of values were just barely higher than their
recommended range:

UI pin 8, UI pin 9 == 450 ohms (should be 360 --> 440 ohms)
UI pin 9, UI pin 18 == 455 ohms (should be 360 --> 440 ohms)

1) Has anyone else experienced this problem of a missing 30m band
while having both 17 and 15m present?
2) Does any of the above described info on my filter board sound
suspect, or is there something else I should check?

Thanks for your help, and 73,

Mark (KB3OKS)
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[Paul Barlow]

Mark,

have you set up the bands in firmware? The K1 doesn't simply "know" which
bands are which, you have to tell it. The procedure is described in "Band
Assignment" on p39 of the K1 manual.

73,

Paul M0CDP


From: "Mark Lampert (KB3OKS)" <[hidden email]>
Subject: [Elecraft] K1-4 -- No 30m band during initial tests
To: "[hidden email]" <[hidden email]>
Message-ID:
        <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1

Hello all,

I'm now a bit further along with my K1-4 build, and I just installed
the VFO toroid (L1) on the RF board, fired the radio up and adjusted
the winds to match the desired range. Shortly after that I was
switching through the four bands as instructed, and I noticed that my
radio is showing the following four bands: 40m, 20m, 17m, 15m ... **no
30m, and both 17 and 15!** (specifically, it displayed 7 MHz, 14 MHz,
18 MHz, 21 MHz).


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[KB3OKS - Mark]

You're absolutely right -- I clearly didn't read that step correctly.
I'm all sorted out now and go bravely onward! Thanks Paul, as well as
to Karl (NM7N).

73,

Mark (KB3OKS)

On Dec 13, 2007 4:21 AM, Paul Barlow <[hidden email]> wrote:

> Mark,
>
> have you set up the bands in firmware? The K1 doesn't simply "know" which
> bands are which, you have to tell it. The procedure is described in "Band
> Assignment" on p39 of the K1 manual.
>
> 73,
>
> Paul M0CDP
>
>
> From: "Mark Lampert (KB3OKS)" <[hidden email]>
> Subject: [Elecraft] K1-4 -- No 30m band during initial tests
> To: "[hidden email]" <[hidden email]>
> Message-ID:
>         <[hidden email]>
> Content-Type: text/plain; charset=ISO-8859-1
>
>
> Hello all,
>
> I'm now a bit further along with my K1-4 build, and I just installed
> the VFO toroid (L1) on the RF board, fired the radio up and adjusted
> the winds to match the desired range. Shortly after that I was
> switching through the four bands as instructed, and I noticed that my
> radio is showing the following four bands: 40m, 20m, 17m, 15m ... **no
> 30m, and both 17 and 15!** (specifically, it displayed 7 MHz, 14 MHz,
> 18 MHz, 21 MHz).
>
>
>

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