[Elecraft] K3 transverter connector question

[Chris Cox, N0UK]

Tuning on my K3 stops at exactly 30.000MHz.

Chris Cox, N0UK
chrisc at chris.org



> On Nov 13, 2020, at 8:08 AM, Chris Cox, N0UK <chrisc at chris.org> wrote:
> 
> Hi, Martin.
> 
> Thank you - that is great to hear.  I will give that a try and see.  I didn’t realize that I could actually tune above 30MHz directly, although I had not even tried.
> 
> VY 73!
> 
> Chris Cox, N0UK
> chrisc at chris.org
> 
> 
> 
>> On Nov 13, 2020, at 3:02 AM, Martin <dm4im at t-online.de> wrote:
>> 
>> Chris,
>> i'm using a 22MHz I/F for my 432MHz Transverter ( 102.5MHz *4 + 22=432MHz.) With the signal on 432, i transmit into a 13cm transverter for QO-100. I didn't change anything on my K3 other than buying the Transverter/RX-Antenna Board. So , no, it is not required to wideband the K3.
>> OTOH, i found there is no 'general coverage' . The specifications drop when you move too far off and at a certain point, transmit fails. I suspect this also happens to the receive parameters, but you should give it a try. IIRC , it IS possible to tune above 30MHz, so you should try a I/F 28-32MHz with your 116MHz crystal and see how you get away.
>> 
>> If you modify your transverter anyway , You may want to try a cheap solution: Buy a Si5351A Clock Breakout Board or similar. It can be programmed to output the frequency you need and i think is even more stable than the original crystal which drifts a lot.
>> With a miniature computer like a arduino nano or attiny, you can build a clock source you can switch 116 / 118 Mhz . Or any other frequency.
>> 
>> Am 13.11.20 um 09:05 schrieb elecraft-request at mailman.qth.net:
>>> Message: 21
>>> Date: Thu, 12 Nov 2020 16:08:33 -0600 (CST)
>>> From: Chris Cox<chrisc at chris.org>
>>> To:Elecraft-K3 at groups.io,elecraft at mailman.qth.net
>>> Subject: [Elecraft] K3 transverter connector question
>>> Message-ID:<f777868f-3751-a95-bbb1-49498865540 at chris.org>
>>> Content-Type: text/plain; format=flowed; charset=US-ASCII
>>> Good day.
>>> I am considering recrystalling my 2m transverter with a 118MHz rock
>>> replacing the existing 116MHz crystal, thereby permitting full two metre
>>> band coverage with a 26-30MHz I/F.
>>> Does the K3 need to be widebanded to enable low-level 26-28MHz RF on the
>>> transverter transmit port or is the low-level output available by default?
>>> -- Chris Cox, N0UK, G4JEC chrisc at chris.org
>> 
>> -- 
>> 73, Martin DM4iM
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