[Boatanchors] Electronic T/R Switch vs Coaxial Type

[rbethman]

Bob,

I have found that if anything, the SS TVs are much worse.

Your 2mtr rig will cause more grief than an HF rig, simply because of 
the near frequency to TV frequencies.  TV starts at 54 Mc and the 
channels go up by 6 Mc apiece.

Cable and satellite run MUCH higher in frequency.

Aircraft comms start at about 118 Mc for civil,  and Mil picks up at 
about 250(225?)Mc up to about 415Mc.  (IIRC - I don't have my mil acft 
rcvr handy at the moment.

Bob - N0DGN

Bob Macklin wrote:
> Do modern solid state TVs with cable connections have the same TVI problems
> the old tube TVs did?
>
> I have a 10 year old Sony that gets RF OVERLOAD when I use my 2M FM RICEBOX
> that is about 2ft from it with a 19" whip on it. If I turn the TV sound off
> there is no problem with the picture. If I tune to cable channel 18 I do see
> some RF TVI but not much. CH18 is in the 2M band.
>
> I need to try it with the new cable DTV converter.
>
> Bob Macklin
> K5MYJ
> Kent (Seattle), Wa,
> "Real Radios Glow in the Dark"
>
> ----- Original Message ----- 
> From: "rbethman" <rbethman at comcast.net>
> To: <boatanchors at mailman.qth.net>
> Cc: "Peter Markavage" <manualman at juno.com>
> Sent: Tuesday, November 04, 2008 12:02 PM
> Subject: Re: [Boatanchors] Electronic T/R Switch vs Coaxial Type
>
>
>   
>> I, like Pete have been running a Johnson TR Switch on the output of a
>> BC-610.  NO TVI!  I monitor the output of the BC-610 with an SM-220
>> w/BP-8.  I also feed my receiver's IF into the SM-220.  I observe NO TVI.
>>
>> I believe that those getting TVI are mistakenly relating the source as
>> the TR Switch.  I only see TVI when over modulating an Apache.
>>
>> Bob - N0DGN
>>     

-- 
Bob - NØDGN