I am baffled.

 

Here's what I have:

 

Flex 5K

DEMI transverters for 222 and 1296

 

I have set the offsets for both on the transverter screen - 194 MHz for 222
and 1268 for 1296. All other parameters are the same. For both 222 and 1296.

 

I have been using the 222 transverter with good results.

 

In trying to get the 1296 set up, here is what I find:

 

Without either transverter powered and a 50 Ohm dummy load plugged into the
transverter port on the 5K:

 

Selecting 222, noise level is -131 dBm

Selecting 1296 noise level is -111 dBm

A 20 dB difference!!!!

Why should they not be the same? Both are a 28 MHz. input.

 

After first making sure that 10 meters was open and I was hearing signals, I
plugged the antenna into the transverter port but could hear nothing. Ok,
maybe the transverter port has a pretty low sensitivity and needs more RF,
as it would get from any transverter. So, then with the dummy load plugged
into the transverter port, I tried transmitting while listening on a
separate receiver. I heard nothing. Yes, it's only a few milliwatts, but I
would think I would be able to rear it.

 

Why should the noise level for the 222 and 1296 selections be different when
they are both the same 28 MHz transverter port? Aa I said, all parameters on
the transverter screen are set the same, except, of course for the frequency
off-sets.

 

Anyone have any ideas?

 

Any help would be greatly appreciated.

 

73,

 

Bill Tynan, W3XO 

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