[ARC5] T-20 Transmitter Photos

[WA5CAB--- via ARC5]

Ben,

You will find four significant differences.

1) the PA is series fed in the ATA and SCR-274-N, and shunt fed in 
AN/ARC-5.
2) the pin circle diameter on the power connector is larger on the AN/ARC-5 
transmitters (receivers are the same)
3) the wiring to the power connector is different in the AN/ARC-5 
transmitters, in part because the PA screens are modulated and have a separate pin.
4) the front panel cover over the loading coil is attached with screws on 
the AN/ARC-5 transmitters and with snap-slides on the others.  So you can 
tell at a glance at either end whether the transmitters are AN/ARC-5 or not.  
Differentiating between ATA and SCR-274-N is more difficult if the 
transmitter is painted black.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 04/04/2015 14:48:28 PM Central Daylight Time, 
kd5byb at gmail.com writes: 
> Good afternoon all,
> 
> The sun was shining this morning so I hauled out the T-20 transmitter 
> for a photo session.
> 
> Photos here:
> 
> <http://www.kd5byb.net/arc5t20/ARC5t20.html>
> 
> One thing I noticed this afternoon after I made the above webpage is 
> that per the sheet metal...it's not a T-20, but a CCT-52209.  Now to 
> familarize myself with the differences between the ATA series and the 
> ARC-5 series...
> 
> thanks much and 73,
> ben, kd5byb