During testing I noticed the receiver was deaf, and high SWR on all bands into a dummy load.
Inspected all connections and found no issues with my soldering but, found IC502 was missing on the main board. I ordered and installed IC502.
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With the installation of IC502 the "Tune SWR" is under Hardware Tests indicates 1.03 - 1.07 on all bands on a dummy load. (Which I feel is good)
The Band, Power Output and Current Draw into a dummy load are indicated below...
Band ? ? ? PO ? Amps
1.838 ? ? ?5 ? ? ?1.114
3.604 ? ? 5 ? ? ? ?.707
5.358 ? ? 3 ? ? ? ?.501
7.074 ? ? ?4 ? ? ? ?.512
10.136 ? ?4 ? ? ? ?.507
14.074 ? ?4 ? ? ? ?.525
18.100 ? ?3 ? ? ? ?.785
21.094 ? ?4 ? ? ? ?.712
24.924 ? ?4 ? ? ? 1.006
28.124 ? ?2 ? ? ? ? .606
50.313 ? ?1 ? ? ? ? ?.607
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The transceiver operates as expected, i.e. Knobs, Buttons, Menus.
I verified the Band Version is set to 160 - 6m
I have also tried a full reset.
I notice the noise level is very high, even on a dummy load, see attached image.
I wonder if transmitting without IC502 initially took out the receiver section?
Also I notice the power output vary a lot, band to band.
Maybe something with the pass filters not being selected properly, and causing the receiver to suffer?
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It's late here, but tomorrow I am going to look for a logic table indicating which filters should be engaged for each band and check.
Also going to remove and check if T401 is installed correctly. I feel good it is but it can't be tested installed.
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Any thoughts or possible direction I should look?
Albert Kaltenbaeck
KE0PRX
