[VHFcontesting] 222MHZ Transverters

[Tom Staley]

Like Jim I also use an Elecraft XV-222. This replaced a 2nd generation DEMI
222 transverter. I find I prefer the Elecraft to the DEMI. Performance is
basically the same. Having the power display adds a bit of reassurment to
the operator that power is going out. I do agree that the unit can get hot,
the chassis has to work as the heat sink - so make sure it can breath and
all should be ok. The drift issue I have not noticed at all, most likely
this is due to the fact that I bought the oven for mine. One issue that I
did find that is not really a negative just something you need to be aware
of is that my transverter isn't exactly on the frequency - ie: 28.100Mhz =
222.097Mhz. But as long as you know about it all is fine. In my case I drive
it with a TS2000 in the transveter mode so all I do is change the value of
the transverter frequency a bit and the read out is right on.

By the way I also have the XV-144 as well. I really like both.

73 de Tom K9TMS

-----Original Message-----
From: vhfcontesting-bounces at contesting.com
[mailto:vhfcontesting-bounces at contesting.com]On Behalf Of James Duffey
Sent: Sunday, September 27, 2009 17:00
To: vhfcontesting at contesting.com
Cc: James Duffey
Subject: [VHFcontesting] 222MHZ Transverters


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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