[UK-CONTEST] FT1kmp partially dead

[John Lemay]

John

Probably the best place for help is the FT-1000 reflector.

However, I had a similar problem, affecting different bands from yourself. I
was given help and a small extract of the FT-1000 Technical Supplement,
which enabled me to mend my own FT-1000MP.

First, here is the coverage affected by the 4 VCO's for the main receiver:

0.1 to 7.499MHz

7.5Mhz to 14.499MHz

14.5MHz to 21.999MHz

22MHz to 30MHz.

So, you can now easily check to see if your "dead" rig has failed between
these precise limits. My problem was the 14.5 to 21.999 VCO, which had
stopped oscillating due to dry joints. It's a problem that is quite well
known.

Meanwhile, I'll search for the email which helped me in the hope I can pass
it on.

Regards

John G4ZTR


-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of John Wayman
Sent: 08 December 2007 17:54
To: UK Contest Reflector
Subject: Re: [UK-CONTEST] FT1kmp partially dead

Sorry for the Off-Topic stuff, but so many of you have or used to have
FT1kmp, I thought this was the best place to ask.
Further investigation reveals that the sub-rx works fine on all bands.
I believe this would indicate that the correct VCO is not being selected on
the Local Unit, or that the correct VCO has stopped working, so the 1st
mixer does not get the right frequency to produce the 70MHz 1st IF. Problem
is, I can't find anything that tells me the frequency bands that the 4
different VCO's correspond to. Without this information, I am groping in the
dark a bit. If 30 and 20m share a VCO with each other and with no other
bands, then I am probably looking in the right area. If not, back to the
drawing board. If you know which VCO corresponds to which band, please let
me know.
Next step is to get poking about with the frequency counter, I think...
It's all very exciting.

73,


John

John Wayman <g4drs at btinternet.com> wrote: Hello,
I'm looking for an expert who can point me towards the most likely reason
for my FT1kmp to stop working on 30 and 20m, both on receive and transmit,
whilst continuing to work on the other bands.
My guess is one of the relays that switch the bandpass filters, but you may
be able to save me the whole fault-finding thing, either by saying 'Yes,
that's what was wrong with mine.' or 'No, mine was the xxx.'
Thanks for reading.

73
John
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