[n4pysoftware] Re: [TenTec] New to the list--Orion questions (Sweep Function)

[Joe Giacobello]

Duane, I'm most appreciative for your advice.  I just bought this used 
unit and got it on the air this week.  I was about to open it up and go 
through the tune-up procedure in the manual.  It does seem to be working 
reasonably well.  I have to put in an A/B switch so I can compare it 
with my FT-736R.

73,

Joe

Duane Grotophorst wrote:

>Joe,
>
>You might want to increase the RX IF output level of
>the transverter slightly. Be careful though to not
>advance it too far. The best way to setup the DEMI
>transverters is to peak the noise level of the GaAs
>FET input stage of the transverter (covered in the
>DEMI documentation). The noise peak as you may recall
>from the DEMI documentation is also very close to the
>best noise figure point. It is the best NF point that
>we are interested in. You would need good test
>equipment to improve it beyond just peaking the
>background noise. 
>
>Once that is set then set the transverters RX IF gain
>pot such that the receivers background noise rises
>just perceptably when you turn the transverter on.
>Anything more than that will be detrimental to the
>strong signal dynamic range of the transverter/IF
>radio system, and anything less will not provide the
>full available sensitivity of the transverter.
>
>Duane
>N9DG
>EN53bj
>
>--- Joe Giacobello <k2xx at swva.net> wrote:
>
>  
>
>>Carl, before I send you on a wild goose chase, I am
>>in error.  The sweep 
>>works on 6M.  However, I wasn't seeing the usual
>>ragged noise baseline 
>>that I observe on HF.  The sensitivity may also be
>>worse on 6M, because 
>>I thought I had heard several weak sigs that weren't
>>displayed by the 
>>sweep.  I will double check today.  This morning I
>>was observing some 
>>strong local sigs without problems.
>>
>>Sorry about the bad info.
>>
>>73, Joe
>>    
>>
>
>
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