[W2CRA] CRA Technical Items

[Art Greenberg]

Count me in.

On Sat, 11 Sep 2010, William Powell wrote:

> All,
>
> More or less in order w/ some overlap
>
> At the transmitter building
> * Finish removing the wet cells from transmitter building
> * Cleaning and painting the floor - includes total neutralizing of the spilled
> acid
> * Construction and installation of new battery rack.
> * Construction and installation of new 12V power system
>
> Design, construction and installation of new control line interfaces.
> Following design requirements I provide, design an interface between the
> controller and the 2 wire phone line and between the 2 wire phone line and the
> transmitter.
> There will be 2 at each end, each on it's own phone line:
>  - One for the main controller and one for the backup
>  - One for the main transmitter and one for the backup
> The interfaces at the controller end will pass the controller audio to the phone
> line with isolation from voltage surges and nearby lightning activity.  It will
> also take PTT from the controller and place it on the line with isolation from
> the audio, voltage surges and nearby lightning activity.
> The interfaces at the transmitter end will take the audio from the telephone
> line and pass it to the transmitter with isolation from the PTT signal as well
> as from voltage surges and nearby lightning activity.  It will also recover the
> PTT signal and use it to key the transmitter with isolation from voltage surges
> and nearby lightning activity.
> In other words: transformers for the audio and relays for the PTT.
>
> Design and construction of transmitter interface.  Mostly connectors, switches
> and wiring.
>
> Effect the new voter and controller.  Documentation, programming and wiring.
>
> Refurbish control site receivers.  Remounting, wiring, controls, new channel
> elements, PL, Time out timers w/ indication.
>
> Refurbish remote site packages.  Remounting, wiring, controls, new channel
> elements, PL, Time out timers w/ indication, link ID.
>
> Looking for co-conspirators,
> Bill - WB1GOT
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-- 
Art Greenberg
artg at eclipse.net