I don't think you can conclude anything by monitoring the transmitter
with a separate nearby receiver. Have you tried measuring the power
output with a power meter or even an SWR meter? Your current readings
look just like what would be expected, and I suspect there is nothing
whatsoever wrong
There's nothing wrong with the currents you're getting.
What does your Watt/SWR meter say when you change power?
Forget about how loud it sounds on the receiver. The econd receivers
AGC could be clamping down to make the signal sound the same. I'll
bet the S meter on the second receiver is going
As a receiver gets heavily overloaded it's not uncommon for the audio output
to drop as amplifier stages are driven so hard they become attenuators.
As others suggested, the *only* way to confirm is with a wattmeter.
1) What does the wattmeter built into the K3 say?
2) Did your K3 pass the TX
Hi all,
Thanks for the tips. I might have taken the instructions too literally and
not taken into account the receiver attenuating the signal. However, I did
confirm that AGC is turned off on the receiving radio, so that can be ruled
out.
What is hard for me to understand is that the signal is
There's a new revision of the DL1 manual (Rev C) that should appear on the
Elecraft web site soon. It has this new formula:
P(watts) = (V + 0.25)2 /25 where V= volts and 0.25 is the RF voltage drop
across the diode.
Ron AC7AC
-Original Message-
Hi all,
Thanks for the tips. I might
Hi all,
Here's the results of my power measurements:
Requested/Measured Power
5 W -- 5.81 W
10 W -- 11.06 W
11 W -- 11.93 W
20 W -- 18.22 W
30 W -- 30.25 W
Looks pretty good to me.
The take away lesson is not to rely on a separate receiver to judge signal
strength.
It's still a mystery to
What is most likely to have fooled you is that if you are transmitting
into a dummy load, then what you are hearing in an antenna-less nearby
second receiver is miscellaneous leakage from the K2 case. This could
easily change when the termination of the low power stage changes its
termination
AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian - N5BCN
Sent: Saturday, May 07, 2011 10:49 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K2 KPA100 transmit test: fail
Hi all,
Here's the results of my
Hi All,
During the course of testing my recently built KPA100, I'm experiencing odd
results on the cw transmit tests. All tests, resistance, and voltage checks
up until this point have been normal.
When transmitting cw into a 100 watt dummy load, things appear normal when
transmitting in QRP
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