K2 power out

[John-22]

I notice the power output from the K2 reads around 15 watts on the K2 meter but

around 4 watts on a Bird 43 meter.

Is it maybe the K2 meter is generous?  I have noted correct levels on the Bird

before.

Thanks.

John.

 

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[Vic K2VCO]

John wrote:
> I notice the power output from the K2 reads around 15 watts on the K2 meter but
> around 4 watts on a Bird 43 meter.
> Is it maybe the K2 meter is generous?  I have noted correct levels on the Bird
> before.

If the K2 does not have the KAT2 or 100 watt amp installed, the RF power indication is
based on a simple RF voltmeter, and is very sensitive to the impedance of the load. If you
do not have a very accurate 50 ohm dummy load connected, the K2's output meter will be
inaccurate.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Don Wilhelm-4]

John,

Assuming you have only the basic K2 - no KAT2, KAT100 or KPA100
installed,  and you are operating into a good 50 ohm non-reactive dummy
load (check it at frequency with an antenna analyzer - a simple
resistance measurement will not be adequate) - then normally, the K2
power display is quite accurate.  Since yours is apparently not, check
all the factors above and then if still inaccurate, check R67, R68, D9,
R69 and R66 on the K2 RF board.  Check for value and for good soldering.

The power display for the basic K2 depends highly on having a
non-reactive 50 ohm load connected, since this is a simple diode
detector circuit.

Given your stated observations, is there any chance that you
interchanged R67 with R68?

73,
Don W3FPR

John wrote:

> I notice the power output from the K2 reads around 15 watts on the K2
> meter but
> around 4 watts on a Bird 43 meter.
> Is it maybe the K2 meter is generous?  I have noted correct levels on
> the Bird
> before.
> Thanks.
> John.
>  
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