[Elecraft] Update: K3 Hard of Hearing

[Martin Sole]

I guess if the transmit is working fine (into an antenna) it rules out 
pretty much anything in the common path.

Do you have the KXV3 Tvtr and Rx in/out module? If the switching around 
it is bad you can jumper the BNC connectors. Or try injecting a known 
level into the Rx in port.

If you have exhausted all the usual likely candidates I would be tempted 
to look at the RX switched bias, make sure it is the correct voltage.

What serial number is the radio?


Martin, HS0ZED



On 22/01/2020 04:02, John Unger wrote:
> Transmit works fine, Martin.
>
> On Tue, Jan 21, 2020 at 7:46 PM Martin Sole <hs0zed at gmail.com 
> <mailto:hs0zed at gmail.com>> wrote:
>
>     Is the transmit working okay?
>
>     Don’t recall if you mentioned before.
>
>     My early K3 suffered 0.1uf capacitor failure causing loss of
>     injection which affected both tx and rx. Another cap failure
>     caused loss of tx only due to shorted switching voltage. Both were
>     on the RefOsc board.
>
>
>
>     Sent from my iPhone
>
>     > On 22 Jan 2020, at 02:42, John Unger <w4au.john at gmail.com
>     <mailto:w4au.john at gmail.com>> wrote:
>     >
>     > Wow, guys, thank you all for the suggestions of things to
>     check, but still
>     > no joy...
>     >
>     > Here's your suggestions that I have checked:
>     > voltage - 13.6
>     > RX ANT not on
>     > I uploaded a couple of old config files - not change
>     > Turning RF GAIN fully CCW puts SWR meter at full scale
>     > My other K3 hears FB on all the antennas
>     > This K3 doesn't have an ATU
>     > Switching an antenna in and out makes no apparent difference in
>     received
>     > signals
>     > No change in BP filters; they have been working fine for long time.
>     >
>     > I do operate SO2R. The last time radio was working OK was during
>     the NAQP
>     > CW contest where I was running 100W. I have operated KW amps in
>     the past on
>     > each radio without any front end problems (but there's always
>     the first
>     > time, right?).
>     >
>     > Thanks again for the help
>     >
>     > 73 - John, W4AU
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