K3 Repairs at home

[Julius Fazekas n2wn]

After perusing a number of photos of the K3, I am
curious if certain spare parts would be available for
repairs at home.

The 1N5711 diodes (if that's what is being used) in
the bridge circuits come to mind. I hope that I've
eliminated the possibility of those getting zapped (as
in my K2), but it would be nice to have them on hand
just in case.

I imagine they are SM devices. I would feel
comfortable working on them. From the looks of the
board layout, the only thing I might need hand holding
on would be the control/DSP board(s)(my nomenclature).
Although I suspect one should never need to make
repairs on it. Modifications may be another story, but
is purely speculative at this juncture...

Still curious about the internal clock an the ability
to directly sync it with WWV or other OTA time source.

73,
Julius
n2wn
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[Brian Lloyd-6]

On May 23, 2007, at 5:39 AM, J F wrote:

> Still curious about the internal clock an the ability
> to directly sync it with WWV or other OTA time source.

There appears to be an external reference input on the back panel.  
You should be able to drive that with a GPS-disciplined reference  
oscillator. That should get frequency error down to at least 1e-10  
which is .1 ppb or .1 Hz error at 1GHz. That should be sufficiently  
accurate for direct frequency input even with the narrowest modes.

73 de Brian, WB6RQN
Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com


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[Julius Fazekas n2wn]

Thanks Brian...

So it appears I would need an additional item to go
that route.. or rely on my lightning fast fingertip
;o)

Cheers,
Julius
n2wn

> There appears to be an external reference input on
> the back panel.  
> You should be able to drive that with a
> GPS-disciplined reference  
> oscillator. That should get frequency error down to
> at least 1e-10  
> which is .1 ppb or .1 Hz error at 1GHz. That should
> be sufficiently  
> accurate for direct frequency input even with the
> narrowest modes.
>
> 73 de Brian, WB6RQN
> Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com
>
>
>

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