[R-390] DA-121/U Dummy Antenna

[Norman Ryan]

Dallas Lankford wrote:
> 
> I would appreciate it if someone would tell me where there is  a schematic of the DA-121/U dummy antenna (used for measuring R-390A sensitivity using the TM 11-856A method).  Best regards,
> 
> Dallas


Hello, Dallas,

I opened up my DA-121/U and found two 1/2 W 5% tolerance carbon
composition resistors configured as shown:

              100
     >---|---\/\/\/---< 
GEN      |               REC
         >
         <  68
         >
         |
     >---|------------<
         |
        _|_
         -
        GND

Hope this helps.

73 de Norman KG4SWM