[NLRS] DEMI 2304 transverter

[Jon C Platt]

Hi John.   I believe that I have one of the newer 2304 DEM transverters.
The front end is wide open, then is followed with a hair pin filter, a MMIC,
a second hair pin filter, a second MMIC, then the signal goes into the
receiver mixer to mix with the LO.   No filtering that I can remember on the
144 receive out from the mixer.

The question may be as to what the bandwidth is on those hair pin PCB
filters ..... if they are centered around 2304 can they cover 2400 ??
Don't know, I'd tend to bet not.   Perhaps LJC or someone else has some
thoughts as to the bandwidth of these three section PCB hair pin filters.

73, Jon
W0ZQ


----- Original Message -----
From: "John P. Toscano" <tosca005@tc.umn.edu>
To: <nlrs@mailman.qth.net>
Sent: Friday, February 01, 2002 9:32 AM
Subject: [NLRS] DEMI 2304 transverter


> Do any of you have one of the recent vintage Down East Microwave
> 2304 transverters?  If so, can you tell me if the front-end filtering
> is tight enough to exclude reception in the 2400 MHz satellite
> sub-band?
>
> I'm seriously considering the addition of a 2304 transverter, at the
> time (this Spring) when all the other antennas go up.  I was going to
> use a modified MMDS downconverter for the Oscar-40 2.4 GHz downlink,
> but I could simplify the cabling and switching quite a bit if the
> 2304 transverter could also hear well enough at 2400 MHz by simply
> tuning my IF radio to 240 MHz instead of 144 MHz.  Then I wouldn't
> need a second box just for hearing Oscar-40.
>
> I'm guessing that the answer is probably NO, but the DEMI folks are
> "out of the office" until February 18th, so I thought I'd try to tap
> the brains of you guys in the meantime.
>
> 73 de KB0ZEV
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