XV144 drops power if "PWR" is moved during xmit in USB mode

[Bob KD7YZ]

Howdy K3' people:

Here's another anomoly I can not figure out.

Thus by the way does NOT happen with my xv432 module.

Put xv144 in USB mode.

Use WSJT9 and put it in echo mode.
Set it to "Auto On" which simply sends a few seconds of a single-note
Tone then waits to see if something comes back from the moon.  Then
transmits again, then listens .. and so forth.

I was looking at the LED bars on the XV144 and decided to up the power.
As soon as my fingers touched the PWR knob, the XV144 ceased output,
verified on watt meter also.

WSJT9-echo-mode waited then transmitted again. No power out.

Stopping WSJT9 and restarting di not help the lack of power out of the
xv144.

However, if I held-down "XMIT" ... to Tune, then instantly the LEDS all
it up and the watt meter was happy.

So I went to the WSJT9 window and pressed to Auto-run     again. Echo
mode started with full power from the xv144 transverter.   I let it go
ten or fifteen times.

Then I touched the PW knob and began the who sequence all over ... no
power out.

So I switched Bands to 28 ... started Echo Mode and it went thru its off
and on sequences a few times.

Then I rotated the PWR knob on the K3 and the Power FROM the K3 varied as
much as I had the patience to rotate the PWR knob.

But, as I said, I could not replicate this on the XV432.

Next I set Mode to SSB and used a microphone/headset to produce speaking
and whistle-tones.

While I was pinning the meter, so to speak, which whistles, I rotated
the power knob and Voila!!! reduced or no power. Ever again .. until I
held XMIT (Tune).

Thereafter I could key the K3 and shout in the heil headset to make 25
watts out appear.

Until I rotated the knob and the xv144 transverter ceased output.

This is repeatable on the xv144.





--
73
KD7YZ Bob

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Bob,

Just another data point ...

I also run the XV144 w/ my K3. I tried your test in SSB mode and CW
mode, and in both cases, turning the PWR knob on the K3 while modulating
or key-down (on cw) simply changes the power to the xvtr as evidenced by
the change in the number of LED's that are lit. I was unable to cause it
to just drop as you have experienced.

73, Dale  WA8SRA


On 2/26/2013 11:41 AM, KD7YZ Bob wrote:

> Howdy K3' people:
>
> Here's another anomoly I can not figure out.
>
> Thus by the way does NOT happen with my xv432 module.
>
> Put xv144 in USB mode.
>
> Use WSJT9 and put it in echo mode.
> Set it to "Auto On" which simply sends a few seconds of a single-note
> Tone then waits to see if something comes back from the moon.  Then
> transmits again, then listens .. and so forth.
>
> I was looking at the LED bars on the XV144 and decided to up the power.
> As soon as my fingers touched the PWR knob, the XV144 ceased output,
> verified on watt meter also.
>
> WSJT9-echo-mode waited then transmitted again. No power out.
>
> Stopping WSJT9 and restarting di not help the lack of power out of the
> xv144.
>
> However, if I held-down "XMIT" ... to Tune, then instantly the LEDS all
> it up and the watt meter was happy.
>
> So I went to the WSJT9 window and pressed to Auto-run     again. Echo
> mode started with full power from the xv144 transverter.   I let it go
> ten or fifteen times.
>
> Then I touched the PW knob and began the who sequence all over ... no
> power out.
>
> So I switched Bands to 28 ... started Echo Mode and it went thru its off
> and on sequences a few times.
>
> Then I rotated the PWR knob on the K3 and the Power FROM the K3 varied as
> much as I had the patience to rotate the PWR knob.
>
> But, as I said, I could not replicate this on the XV432.
>
> Next I set Mode to SSB and used a microphone/headset to produce speaking
> and whistle-tones.
>
> While I was pinning the meter, so to speak, which whistles, I rotated
> the power knob and Voila!!! reduced or no power. Ever again .. until I
> held XMIT (Tune).
>
> Thereafter I could key the K3 and shout in the heil headset to make 25
> watts out appear.
>
> Until I rotated the knob and the xv144 transverter ceased output.
>
> This is repeatable on the xv144.
>
>
>
>
>

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[Bob KD7YZ]

On Tuesday Boresz used a Straight-Key to send:
-------------Original Comment-------
 I was unable to cause it
> to just drop as you have experienced.

> 73, Dale  WA8SRA
Thanks!! .. I guess that is another strike for my xv144

it is 100% repeatable here.

So I imagine I have a user setting fouled up.
Not an uncommon happening to a newbie to a piece of equipment.

I wonder of this is related to the constant 5kHz transmit offset  I wrote
about.  Thinking aloud.

Time I buy an Icom for 144 EME I guess.     Though I really didn't want
another rig.

thanks for the reply.


--
Best regards,
Bob  KD7YZ    Win7-64bit + K3

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[John Lemay]

Bob

 

I can't bring to mind any user setting which would cause this issue.
However, before getting out your sledgehammer, I suggest you run through the
TX Gain Calibration routine, which is in the manual - pay particular
attention to the Milliwatt Calibration because this is the power level used
to drive the transverter. I'm not 100% convinced this will help, because you
say that the 432MHz transverter behaves fine.

 

Given your earlier mentioned problem with the 144MHz transverter tx
frequency, it looks like the transverter has an obscure problem best
directed to the experts - Elecraft Inc.

 

One last suggestion, are you getting these results with amplifier and
aerials attached - possibly you have an issue with RF getting into your
power supply. If you can, see if the results of your test change when you
use a dummy load.

 

John G4ZTR

 

 

  _____  

From: [hidden email]
[mailto:[hidden email]] On Behalf Of KD7YZ Bob
Sent: 26 February 2013 19:13
To: Dale Boresz
Cc: [hidden email]
Subject: Re: [Elecraft] XV144 drops power if "PWR" is moved during xmit
inUSB mode

 

 

On Tuesday Boresz used a Straight-Key to send:
-------------Original Comment-------
 I was unable to cause it
> to just drop as you have experienced.

> 73, Dale  WA8SRA
Thanks!! .. I guess that is another strike for my xv144

it is 100% repeatable here.

So I imagine I have a user setting fouled up.
Not an uncommon happening to a newbie to a piece of equipment.

I wonder of this is related to the constant 5kHz transmit offset  I wrote
about.  Thinking aloud.

Time I buy an Icom for 144 EME I guess.     Though I really didn't want
another rig.

thanks for the reply.


--
Best regards,
Bob  KD7YZ    Win7-64bit + K3

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[Bob KD7YZ]

On Tuesday Lemay used a Straight-Key to send:
-------------Original Comment-------

> ... I suggest you run
> through the TX Gain Calibration routine, which is in the manual – pay
> ... I’m not 100% convinced this
> will help, because you say that the 432MHz transverter behaves fine.


as does the XV50 I own.

I just connected the 50-ohm Dummy Load and ran thru the three
transverters. Only the xv144 behaves oddly



--
Best regards,
Bob  KD7YZ    Win7-64bit + K3

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