K2 Problem

[wsm-3]

Hi

Well, I have a problem with my K2, but don't know if it is worth
trouble shooting.

In the first initial test the VFO works fine on all the bands.
All the relays click when checking them as per the manual.
When tapping the display button it changes to the volt meter, but
it doesn't read voltages. It always stays on all zeros when checking
the voltage on pin one of U1. Even tried to check the voltage of a
flashlight battery by running a lead from the ground loop on the
RF board to the negative end of the battery, and the lead from P1
to the positive end of the battery, got nothing. U1 pin one does
have 6 volts on it bacause I checked it with my DMM.
Since the voltmeter doesn't work, that means the RF probe won't
work either, I guess.
I checked the continuity of the lead from P1 by running a resistance
check from the bottom of the RF board to the end of the test lead.
Haven't checked the manual yet for trouble shooting it, but if
anyone has any suggestions on where to start looking, I would
appreciate it.
Thanks
Scott N5SM


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[Mark, KJ7BS]

Make sure the switch on the upper right (as you look at the front of the K2)
of the control board is set for volts.

Mark, KJ7BS
Glendale, AZ

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of [hidden email]
Sent: Thursday, November 23, 2006 10:10 PM
To: [hidden email]
Subject: [Elecraft] K2 Problem

Hi

Well, I have a problem with my K2, but don't know if it is worth
trouble shooting.

In the first initial test the VFO works fine on all the bands.
All the relays click when checking them as per the manual.
When tapping the display button it changes to the volt meter, but
it doesn't read voltages. It always stays on all zeros when checking
the voltage on pin one of U1. Even tried to check the voltage of a
flashlight battery by running a lead from the ground loop on the
RF board to the negative end of the battery, and the lead from P1
to the positive end of the battery, got nothing. U1 pin one does
have 6 volts on it bacause I checked it with my DMM.
Since the voltmeter doesn't work, that means the RF probe won't
work either, I guess.
I checked the continuity of the lead from P1 by running a resistance
check from the bottom of the RF board to the end of the test lead.
Haven't checked the manual yet for trouble shooting it, but if
anyone has any suggestions on where to start looking, I would
appreciate it.
Thanks
Scott N5SM


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[Don Wilhelm-3]

Scott,

First - There is no association of the voltmeter probe and the frequency
counter - they use different headers and different circuits.

Now for your voltmeter problem - do you have the jumper on the 3 pin header
at the top of the Control Board?  In one position, it will display the
internal voltage and current of the K2 and in the other position, it will
display the voltage that the wire probe is attached to.  Be certain the wire
is connected to the proper pin of the 2 pin housing and that the crimp pin
in the housing is making good contact with the J5 header.

Try putting the jumper on the INT position and see if you obtain a voltage
and current reading for the power connected to the K2.  If you do, the
voltmeter is working and the problem is in the probe.

73,
Don W3FPR

> -----Original Message-----
>
> Well, I have a problem with my K2, but don't know if it is worth
> trouble shooting.
>
> In the first initial test the VFO works fine on all the bands.
> All the relays click when checking them as per the manual.
> When tapping the display button it changes to the volt meter, but
> it doesn't read voltages. It always stays on all zeros when checking
> the voltage on pin one of U1. Even tried to check the voltage of a
> flashlight battery by running a lead from the ground loop on the
> RF board to the negative end of the battery, and the lead from P1
> to the positive end of the battery, got nothing. U1 pin one does
> have 6 volts on it bacause I checked it with my DMM.
> Since the voltmeter doesn't work, that means the RF probe won't
> work either, I guess.
> I checked the continuity of the lead from P1 by running a resistance
> check from the bottom of the RF board to the end of the test lead.
> Haven't checked the manual yet for trouble shooting it, but if
> anyone has any suggestions on where to start looking, I would
> appreciate it.
> Thanks
> Scott N5SM
>

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