I have the older DEMI 222-28 and the newer unit. I can confirm that
the newer unit is quicker to stabilize on frequency and seems to have
better sensitivity. I'm driving mine with at 1500 via the xverter port.
So far so good. Two more transverters to go and I'll have an all DEMI
10 band rover driven by the 1500. After that, I'm going to work on
getting the 10M ref locked LO into as many of them as I can so band
switches are spot on frequency. I can't wait to get rid of the 910h
and be all SDR from 6m to 24g.
The only real quirk I've had to work around is getting the attenuator
pads back out of all the transverters when I moved from the Yaesu 817
IF to the low power xverter port on the 1500. I've also had to
disconnect the 10M lo from the 1500 because of a birdie I can hear at
144.200 with it connected. I haven't yet worked out if this is a flaw
in my LO, the DEMI 10-4 LO splitter I'm using or the way I have all
the transverters interfaced. Disconnecting the LO from the 1500 fixed
it for now, so I'll solve that issue later. For now the built-in LO
in the 1500 appears to be stable enough it's not a big concern.
Eric - kr0ver
At 11:38 AM 1/19/2012, Lloyd Berg N9LB wrote:
Hi Mike!
I've been running the DEMI 222-28 25w transverter (2010 version) for
about 2 years. Rig is the FLEX-5000, using the transverter ports into a
dual 1-of-6 RF switch. It works well. I use it with a M2 222-10EZ
antenna at 60 feet. I also have new version DEMI transverters for
other bands, incl 902 and 1296, all are performing well.
People tell me that the new version DEMI transverter frequency stability
is greatly improved and the sensitivity and resistance to strong signal
overload is also substantially better than with the earlier models.
73
Lloyd - N9LB
Message: 8
Date: Thu, 19 Jan 2012 15:52:25 +0000
From: Mike Valentine <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [Flexradio] 222 MHz Optimum Setup
Message-ID:
<4b23f631d60e34478769fd89ac3a35c830009...@vr-ex2010.valentine1.com>
Content-Type: text/plain; charset="us-ascii"
Hi all,
What do the VHF/UHF Flexers consider the optimum way to use a
FLEX-5000 on 222 MHz?
Anyone know how the 2010 version of DEMI 222-28HP compares to the
previous version?
Is the DB6NT TR 222 H still available?
What else is out there?
Connection configuration quirks?
Thanks in advance,
Mike - W8MM
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