I've nearly completed my K1, and the receiver has been calibrated and
works extremely well. While calibrating the receiver against my K2, I
had a 3 foot antenna consisting of daisy-chained alligator clips
attached to the antenna jack, and I was picking up not only the adjacent
K2, but also RTTY signals on the band!
Sadly, the transmitter has not been so kind. Any attempt to put the
unit in transmit mode (by pushing WPM+ and WPM- together) resets the
power out to 0.1 watts, which is confirmed by the external wattmeter.
All of the resistance checks on p45 have passed with the KFL1-4 removed
and the jumper set to K1 (not KAT1). With the KFL1-4 in place and
14.38V at the input jack, a few of the voltage test points on p46
indicate 0.1-0.2V above the quoted range, which is presumably a result
of the input voltage being a little higher than recommended. (I can
stick a diode in the power cord if this is a real problem.)
However, J7 pin 1 shows 7.8V instead of the quoted range of 5.1-6.7V.
What, if anything, does this indicate? R9, D14, and D5 are all
connected as measured by the ohm-meter.
I've looked at the schematic, and I don't understand the RF-out path
well enough to see what the obvious culprits might be. I have the RF
probe that I built with the K2 plus a Tek scope. Any suggestions before
I dive into the transmitter signal tracing on page 6 of Appendix E?
A few pointers would be helpful before I disappear into the deep water!
Cathy
N5WVR
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