[R-390] Look for poser connector.

[Steve Byan]

On Aug 19, 2007, at 11:03 PM, DW Holtman wrote:

> I recently acquired a  CU-1388/Flr-9 Multicoupler to be used on  
> R-390s. The problem is there is no power plug. I have one rigged up  
> for now , but would like get the correct plug. It is a military  
> three pin screw on connector. Looking at the Digi Key and Amphenol   
> web page, it looks like it is a series 97-3107A (I think) which it  
> looks like is obsolete. I need a female three pin screw on  
> connector. The female end on the coupler is 7/8 inches outer dia, I  
> guess the plug would be around an inch. I think it was a common  
> connector back in the day. Does anyone have any ideas where I might  
> locate one? I can send pictures.

I just replaced the line filter on mine with a new filter with an IEC  
connector. No idea where to find the mil power cord connector.

> I'm also trying to locate a manual for the same, any help would be  
> great. I have already checked the usual sources on the internet for  
> the manual.

I haven't found a TM for the CU-1388 yet, but it turns out to share  
much of its circuitry, including the amplifier modules, with the  
AM-4213/FLR-9(V). The TM for the AM-4213/FLR-9(V) is available from  
the Bunker of Doom <http://bunkerofdoom.com/lit/flr9/index.html>.

Watch out for the power supply. Mine gave up the ghost and took out a  
bunch of PNP RF transistors, which are basically made of unobtanium  
now-a-days. When I opened the supply, the PC board had evidence of  
extensive ECO or FCO activity. I replaced the supply with a 24 volt  
open-frame linear supply cranked down to about 21 volts, and the PNP  
RF transistors with 2N5160's.

I run mine with the cover removed; it's made for forced-air cooling  
from an external blower but I didn't want to rig up the duct-work, so  
I just leave the cover off and depend on convection cooling. Don't  
run it in the cover without a blower.

Regards,
-Steve

-- 
Steve Byan <stevebyan at mac.com>
Littleton, MA 01460