+4 to +16 dBm (2.5mw to 40mw). It's stated on last page of kit
instructions (I don't have a copy of the current manual as I was a
beta tester).
but look here: http://www.kl7uw.com/K3EXREF.htm
I use a 10-MHz amplifier with four 10 dBm outputs made by DEMI:
https://www.downeastmicrowave.com/searchresults.asp?Search=10-4&Submit=
I built the kit into my own enclosure. My OCXO is Russian surplus
obtained from e-bay for about $45. I outputs +7 dBm but has strong
2nd harmonic which the DEMI amp filters out. I lock two transverters
in addition to my K3.
+10 dBm would be a good target level for driving the EXREF. Be sure
to check CONFIG: REF CAL for blinking asterisk between REF and
CAL. That indicates that the radio is under EXREF control.
=========================================
From: Grant Youngman <ghyoung...@gmail.com>
To: k...@arrl.net
Cc: Elecraft Refl <elecraft@mailman.qth.net>
Subject: Re: [Elecraft] External 10 Mhz reference level
Message-ID: <9e98b46e-4c39-432e-b9ea-d14139da5...@gmail.com>
Content-Type: text/plain; charset=utf-8
It?s in the K3XREF manual. +4 to +16 dBm. Your reference doesn?t
have enough output.
Grant NQ5T
> On Nov 21, 2019, at 3:33 PM, Dave Sublette <k4to.d...@gmail.com> wrote:
>
> I have a K3s, delivered in January this year. I am using an external GPS
> disciplined 10 Mhz reference to the External Ref input on the back. I
> cannot find anywhere in the manual what the required level for this input
> is. I have -1.1 dBm and it seems to work. However, once in a while, the
> K3s frequency shifts down 10 hz, then back to the original frequency, then
> up 10 hz, then back to original frequency, all in a matter of two t four
> seconds. This happens maybe once a week and lasts for a minute or two. I
> have never heard it do more than one sequence of down-back-up-back at
> time.
>
73, Ed - KL7UW
http://www.kl7uw.com
Dubus-NA Business mail:
dubus...@gmail.com
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