[Elecraft] Failing K3 at 3C0L

[W0MU Mike Fatchett]

OMG a radio broke.....No other Dxpeditions have ever had equipment 
failures?



On 10/27/2017 12:33 PM, Ron D'Eau Claire wrote:
> I doubt if anyone expects the receiver to survive if you hook the output of
> even a 10 watt transmitter directly to the receiver antenna connector. If
> the layout of a multi-transmitter site does not include consideration for
> substantial separation between antennas, there will be failures.
>
> The K3/K3S receivers (sub and main) are protected by carrier-operated relays
> that shunt signals to ground in the event they are strong enough to cause
> damage. Of course any protective device can be defeated (or destroyed) if
> punished too hard.
>
> Successful multi-transmitter operation begins with a rational antenna layout
> considering the power levels involved. IMX, we've always used at least one
> wavelength between transmitters running 100 watts or so (250 feet on 80, 120
> feet on 40, and so on) and we orient the antennas to minimize coupling.
>
> 73, Ron AC7AC
>
>   
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of brian
> Sent: Friday, October 27, 2017 10:35 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Failing K3 at 3C0L
>
> I'm going out on a limb. I've heard that some other DXpeditions had K3
> failures in the RX section.  RX dead TX OK.  Apparently, the protection
> circuitry was not enough in the close quarter multi-transmitter operations.
> It would be nice to know the details or if this or is just rumor.  If this
> is so what in the field fixes could be done?
> Alternatively, what additional steps in such contemplated operation could be
> taken to further minimize such failures.
>
> 73 de Brian/K3KO
>
>
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