[Elecraft] K3 - stuck at MCU LD we upgrading software

[Ron D'Eau Claire]

I think you will find that all of them have over-current protection. It's
been standard in all the Astrons I have messed with in Land Mobile service
since the early 1980s. 

Yes, the K3s has an automatic resetting fuse for all but the 100 watt amp.
The amp is protected by the circuit breaker that is reset by pressing the
20A button on the back of the K3S. 

73, Ron AC7AC 

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Tom
Sent: Sunday, January 29, 2017 2:31 PM
To: Ron D'Eau Claire
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 - stuck at MCU LD we upgrading software

Thanks Ron.  Not sure if my old Astron 35A has built in over-current
protection or not.  I know it has the crowbar protection for over voltage.

Does the K3S have any kind of internal protection like a resettable fuse?



73,
Tom - KQ5S

On Sun, Jan 29, 2017 at 4:15 PM, Ron D'Eau Claire <ron at cobi.biz> wrote:

> That depends upon the power supply. My Astron has over-current 
> protection that shuts it off in the event of a short. The output stays 
> off until I cycle the power switch on the Astron, so I don't use any 
> additional protection.
>
> 73, Ron AC7AC
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of 
> Tom
> Sent: Sunday, January 29, 2017 1:58 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 - stuck at MCU LD we upgrading software
>
> Are folks hooking their radios directly to the power supply without a 
> fuse inline?  I noted that the Elecraft supplied cable for my K3S did 
> not include a fuse.
>
>
> 73,
> Tom - KQ5S
>
>
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