[MilAir] frequency listening question

[Dave Mayfield W9WRL]

Only thing I can answer to is. That some Icom radios older ones anyway, 
if you remove the back up memory battery without keeping external 
voltage on the system you e-prom chip would loose all the info stored in 
it and the radio will have to be sent to Icom to be re-programmed. 
Someone out there had a replacement chip that you could install that had 
non volatile memory. Other than that all radio company's want to service 
what they sell. Have you ever seen a Ford or Chevy dealer that did not 
want to do all the service work on your car.

Have fun, the high bands can be a lot of fun. Use good low loss coax and 
good fittings and you will hear all kinda of stuff.

Dave W9WRL.com

odyslim at comcast.net wrote:
> Hello,  Please excuse this question. I have very little experience listening
> to the UHF/ VHF frequencies. My retirement is due June 30 and I will have time
> to begin listening to UHF and VHF. I have been putting together a station
> so I can monitor several frequencies at one time. What I have is 4 ICom IC-R100's
> and a PRO-2006. Before mounting all of the radios in the rack trays,  I want
> to change all of the batteries. Each R-100 has 2. 
>
>  Question 1: The manual says to have it done at an ICOM dealership. Why?
> Will damage the radio somehow?
>
>  Each R-100 has 3 antenna outputs. 500kc-50 megs, 50mhz-905megs
> and 905 megs to 1800 megs. Question 2: Is there anything to listen to above
> 905 megs? My reason for asking is I want to avoid making up the extra 4 patch
> cables ( 4 radios) and also want to avoid the extra multi-coupler if I can
> So what is up above 905 megs?
>
>  I know this sounds rudimentary to all of you experienced listeners but I have
>  been monitoring HF since childhood. UHF/ VHF is a new game for me. the only
> frequency I know is the Tipton Airport freq (MD). I live very close and enjoy
> listening to that.
>
>  My HF section is 4 Yaesu FRG-100's They will also be rack mounted.
>
>  I have an old C&P telephone company rack that has nice doors front and back. 
> There  will be plenty of room for the radios, A 35 A/H gel cell battery, charger 
> rig-runner, power supply,  multi-couplers ect. This will be my 12 volt set-up.
> I have a bunch of R-390A's I use on a daily basis as well.
>
>  Any how, if anybody can help with the battery and frequency questions, I would
> greatly appreciate the help.
>
>  Oh, My antenna is a discone mounted up on the roof of my house. Will that
> be sufficient?
>
> Regards, Scott
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