OK John - I am aware of the ability to run the local oscillator of the
XV222 without turning the transverter on. I am leery of doing this for
a couple of reasons, the primary one being that I do not want it
drawing power when the transverter is turned off; over the course of a
contest that can consume enough power to worry about. If I were a
fixed station, I would not worry about it, but in a rover, power
management is critical.
Thanks for the suggestion though. They would be an excellent
transverter if the duty cycle were a bit higher, the drift minimized
and the ability to net the LO crystal was provided. Still I like it
very much. - Duffey
On Sep 28, 2009, at 10:44 AM, John D'Ausilio wrote:
> You can easily jumper the XV so that the LO remains on at all times
> that power is available on the connector .. I don't remember it's
> designator, but it's 5 pin block with multiple options (I can look it
> up if you have trouble finding it).
> The heat is a problem for sure .. I've experienced issues on 2M during
> band openings when it sees heavy use .. planning on putting a fan to
> blow over all four transverters (I have mine in a stack using a custom
> bracket)
>
> de w1rt/john
>
> On Sun, Sep 27, 2009 at 6:00 PM, James Duffey
> <jamesduffey@comcast.net> wrote:
>> I use an Elecraft XV-222 transverter for 222 MHz. It has a very good
>> receiver as it is sensitive and very immune to overload and strong
>> signal intermod.
>>
>> Having said that, it has a couple of faults.
>>
>> The first is that it runs hot and although 20 Watts out can be run on
>> SSB, it will still run hot, and the power should be probably be held
>> to 10 Watts or so on high duty cycle modes like FM and WSJT. This is
>> not a problem if you have a linear that takes the lower power input.
>>
>> The second is that my unit drifts noticeably from a cold start. While
>> probably not a problem for fixed station use, where the power can be
>> left on, in the rover I turn it on only when I go to 222 MHz to
>> conserve power and then it drifts as it never gets warmed up as I am
>> turning it on and off.
>>
>> With the K2 it has a nice interface and is if you are using a VHF
>> transceiver. - Duffey
>>
>>
>> --
>> KK6MC
>> James Duffey
>> Cedar Crest NM
>>
>>
>>
>>
>>
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>>
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