K3 - 6M issues
Upgraded the older K3, #311 to current upgrades and firmware. Also added the PR6. Finally getting a chance to spend some time playing on 6M. A couple issues. These issues do not happen on the lower bands, only 6M. Looking for feedback and suggestions. I am assuming what I am seeing is not normal.
1. VFO A & B. If the internal preamp and the PR6 are off there is no noise when turning the VFO's. When I turn on the internal preamp there is some low level noise when turning the main VFO or the sub-receiver VFO.
When I turn on the PR6 the noise increases to about S1-2 when turning either VFO . The noise level is sufficient to cover up a weak signal.
When I turn on both the PR6 and the internal preamp the noise level increases another S-unit. In both cases the noise level is higher on the main receiver than the sub-receiver.
2. Here is what happened when listening to some beacons this morning. I tuned in a beacon on 50.075 that was S7 with no preamps. If I tuned to 50.074.2 I could here the station S1-2. But it sounded chirpy and raspy. If I turn on the PR6 the signal increased to S9 +5 on 50.075 and the signal at 50.074.2 became louder and more chirpy and raspy.
Also tried injecting a signal. It seems everything is fine and I don't hear the signal anywhere else as long as I keep the input signal below about S4-5. Once I get above about S5 whether increasing the injected signal or using PR6 or the internal preamp I start hearing this "image" about .8KHZ below the carrier.
Did these comparisons next to a PRO III. Wanted to verify these issues were rig and not externally related.
Also verified NB and NR were off.
Any ideas? Figure I would throw this out on the reflector before sending it off to Elecraft support in case it is operator error.
Tnx
N2TK, Tony
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