[VHFcontesting] What separates a decent transverter from an awesome transverter?

[Steve(K1IIG)]

PAUL,
The Demi Micro-Lo is notorious for drift which of course they have a Syn 
board you can replace that requires 10mhz to lock it. You can buy an 10mhz 
OCXO for $10 on the internet that will work fine to lock it.
Take a look at this site https://zl2bkc.com/ which also has a replacement 
board for the Micro-Lo.

73
Steve

--------------------------------------------------
From: "N1BUG" <paul at n1bug.com>
Sent: Wednesday, April 25, 2018 3:20 AM
To: "VHF Contesting" <vhfcontesting at contesting.com>
Subject: Re: [VHFcontesting] What separates a decent transverter from an 
awesome transverter?

> One thing I didn't see on your list that always concerns me is LO
> drift. Drift can be a problem for any weak signal work, say a long
> haul CW sked during a contest. If you want to do some of the digital
> modes it can become a critical issue, even a show stopper.
>
> Since I can neither afford nor get my head around the complexities
> of GPSDO locking, I am always concerned about crystal oscillator
> drift in transverters. Usually I do the best I can to build and
> install some type of crystal heater... with mixed results over the
> years.
>
> Sometimes I find things that surprise me. Last summer I measured
> drift on two 1296 transverters: a relatively ancient UHF Units and a
> relatively newer but not current generation DEMI, both as yet
> unmodified. Over a temperature range that caused the DEMI to drift
> over 6 kHz, the UHF Units moved just a bit over 200 Hz! I know which
> one I will be using if I ever get the rest of the stuff together for
> 1296.
>
> Paul N1BUG
>
>
> On 04/24/2018 10:31 PM, Patrick Thomas wrote:
>> Hey all,
>>
>> Subject more or less says it all... I guess better sensitivity,
>> lower noise, better selectivity, and better linearity are the
>> essentials in vague and relative terms, but what attributes do
>> you look for in a REALLY GOOD transverter?
>>
>> Or for those who have gone further into making them... what
>> components, construction techniques, etc., make a difference?
>>
>> Partly this is a question I hear a lot and only have a vague
>> notion of how to answer other than "obviously the expensive ones
>> are better... somehow." :)
>>
>> And partly it is a request for topics for self-guided
>> study/experimentation as I attempt my own homebrew projects.
>>
>> Many thanks,
>>
>> Patrick - KB8DGC
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