K4 RX overload protection

[Edward H Russell]

Does the K4 have internal RX overload protection. If not, what RF level can
it tolerate?

TKS,
73 ED W2RF


 

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[wayne burdick]

Hi Ed,

Each of the K4's receivers has a fast-acting Carrier Operated Relay (COR) that activates between +20 and +25 dBm. When the COR triggers, it disconnects all active circuitry of the associated receiver from the antenna. COR hold time is programmable.

For signals that are below COR level but still extremely strong, the K4 can automatically (at the user's option) adjust receiver front-end gain to optimize dynamic range.

73,
Wayne
N6KR

> On Oct 22, 2020, at 4:51 AM, E.H. Russell <[hidden email]> wrote:
>
> Does the K4 have internal RX overload protection. If not, what RF level can
> it tolerate?
>
> TKS,
> 73 ED W2RF
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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[Edward H Russell]

Excellent.

Thanks,
ED / W2RF




-----Original Message-----
From: Wayne Burdick <[hidden email]>
Sent: Thursday, October 22, 2020 11:01 AM
To: E.H. Russell <[hidden email]>
Cc: Elecraft Reflector <[hidden email]>
Subject: Re: [Elecraft] K4 RX overload protection

Hi Ed,

Each of the K4's receivers has a fast-acting Carrier Operated Relay (COR)
that activates between +20 and +25 dBm. When the COR triggers, it
disconnects all active circuitry of the associated receiver from the
antenna. COR hold time is programmable.

For signals that are below COR level but still extremely strong, the K4 can
automatically (at the user's option) adjust receiver front-end gain to
optimize dynamic range.

73,
Wayne
N6KR

> On Oct 22, 2020, at 4:51 AM, E.H. Russell <[hidden email]> wrote:
>
> Does the K4 have internal RX overload protection. If not, what RF
> level can it tolerate?
>
> TKS,
> 73 ED W2RF
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]

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