Mark,
Find out where the problem is before digging into anything, it will
greatly simplify your troubleshooting steps.
Add a capacitor to your antenna, and use it to inject signals into your K2.
Start at the cathode of D6. Here you should hear a signal and noise -
keep in mind that there is no filtering of the receiver front end with
the antenna connected here, and it will respond to anything your antenna
picks up.
Next, try the W6 jumper (or pin 3 of J13 if you have the K2 amp keying
kit or the K60XV plugged into J13). Here you should hear the 40 meter
band because the bandpass filters are now between the antenna and the
receiver front end. The level will not be as loud as at the cathode of
D6, but should be 'almost as loud'.
If you have good 40 meter reception here, move on, but if not, there is
something wrong with the 40 meter bandpass filter.
Moving on, next try the W1 jumper (or pin 1 of the K160RX option board
header). If you still have 40 meter reception here, the T/R switch is
good and your problem is in the Low Pass Filter.
Once you have isolated the problem area, the remaining troubleshooting
steps are greatly simplified. Right now, based on the information we
have available, we can only say that the problem lies somewhere in the K2.
If you do not find a definitive answer with the steps above, a similar
process can be done in transmit using the RF Probe.
73,
Don W3FPR
Mark Saunders, KJ7BS wrote:
Thanks to everyone for the suggestions. Here is some more information
resulting from your suggestions.
I have no measurable RF output on 40m or any meaningful RX on 40m.
The RX/TX works on all other bands including 160m.
I get the same RX/TX results from ANT1 & ANT2 and main.
I get the same RX results on the receive ANT.
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