Hi all,
The symptom of my problem is:
1. when setting k2 power to 5 watts, I get a reading of 2.2 amps with
abt 0.8v drop
2. when looking at power output with an external wattmeter, 5 watts
reflecting on the external wattmeter shows as 3.8 on the k2. Similarly,
10 watts on external wattmeter
Neal Campbell and Sarah Ferrell wrote:
The symptom of my problem is:
1. when setting k2 power to 5 watts, I get a reading of 2.2 amps with
abt 0.8v drop
2. when looking at power output with an external wattmeter, 5 watts
reflecting on the external wattmeter shows as 3.8 on the k2. Similarly,
Neal:
How sure are you that the wattmeter is reading correctly? What scale are
you using to read the output on and are you operating the radio into a dummy
load or an antenna? Also where are you measuring the 0.8 volt drop? That
sounds like a pretty big drop in voltage with only 2.2 amps
k4zm wrote:
I have built thirteen K2's and have never
seen one that would produce 19 watts output at any setting of the power
control or any band.
The power output of the K2 is determined by an ALC feedback mechanism. When you
set the power control to 5 watts, the ALC circuit increases the
The good news is that I did a diode dance, had the rf probe diode in
D9, had the real d9 substituted for a 4148 and a 4148 in the rf probe.
Will swap them around and redo the tests!
Neal
On Feb 13, 2005, at 6:00 PM, Vic Rosenthal wrote:
Neal Campbell and Sarah Ferrell wrote:
The symptom
I have retested and the output as shown on the k2 tracks more closely
with the watt meter. On 40m with the k2 showing 10 watts, I am seeing
2.6 amps.
When I push it to the maximum, it shows between 14 and 16 watts
depending on the band.
I have set cal cur to 3.25amps. When I crank it to
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