[R-390] multiple receiver coupler

[Roy Morgan]

On Jan 19, 2015, at 3:38 PM, Roger Ruszkowski <flowertime01 at wmconnect.com> wrote:

> 
> Mike,
> 
> Fair Radio has a CU872 antenna coupler for $45.00 on the shelf.
> It needs 20 each 6922 tubes.

Would-be MultiCoupler folks,

I searched fair radio sales web site and can only find the manual for these:
MM-CU-872A   -   CU-872A Maintenance Manual Theory, maintenance , schematics. Repro, 
$21.00 each

I have two files of notes on multicoplers, both include more extensive experience and advice from Roger.  There is a lot of info on the CU-872 and some on other types of military multi couplers.

In summary about the CU-872:
- It passes from 2 mc up past 30 mc
- has nearly zero gain
- does not add noticeable noise to the signals it handles
- the 2 mc high pass filter can be easily bypassed
- were normally run 24/7 for 6 months before being checked for performance/weak tubes.

‘Glad to mail these to anyone interested.

Roy


Roy Morgan
RoyMorgan at alum.mit.edu
K1LKY Since 1958