[Elecraft] K3: Receive Ant Question

Brian Alsop alsopb at nc.rr.com
Wed Nov 13 17:43:31 EST 2013


Guys,

I thought he said RX antenna input.  The COR is on the aux ant input.
There is no COR on the RX antenna input (it's not needed, I think.)


73 de Brian/K3KO

On 11/13/2013 22:28, Mike K2MK wrote:
> Hi Steve,
>
> It is separated by a relay but that doesn't mean that you can't damage
> internal circuitry. If you hear relay clicking sounds while you are
> transmitting then you have tripped the protective COR (carrier-operated
> relay). If this occurs then you need to reducer power or separate your
> antennas more, and/or provide external protection.
>
> The diagram on page 42 of the K3 manual illustrates the presence of the
> COR(s).
>
> 73,
> Mike K2MK
>
>
>
> K4FJ wrote
>> Am I correct in assuming that the Rec Ant input is disconnected from the
>> main receiver input upon transmit by way of a relay?  If so, can I further
>> assume that connecting a beverage, or other receive antenna, to the
>> Receive Ant input will cause no harm to the main receiver upon transmit?
>> In other words, is a relay enough protection?
>>
>> I ask because I would like to rule out needing an external protection
>> device when using a beverage antenna.  I run full legal power.
>>
>> Thanks in advance.
>>
>> 73, Steve, K4FJ
>>
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