[R-390] Another 390A Carrier meter question

[roy.morgan at nist.gov]

Quoting DW Holtman <future212 at comcast.net>:
..It reads around mid-scale with 
> 0.1 mv/-73 dbm input on the balanced antenna. Does this sound about 
> right.

Nope. It does not. 0.1 millivolt is 100 microvolts.  That might be the rf input
voltage needed for mid-scale reading on the meter, but I don't remember the
detials.   If the meter does not go pretty much way up on local broadcast
stations using a moderate or longer antenna, it's not reading right.

> Any ideas or suggestions will be greatly appreciated.

1) Get a manual and read the alignment procedure.

2) Do the IF gain adjustment from Chuck Rippel's site before you do the carrier
meter adjust.

3) Adjust the carrier meter by the book.  Have some idea about your ACTUAL rf
input voltage if you like, or just follow the book prodecure if you don't need
to understand what's really happening at the antenna input jack.

Roy


Roy Morgan
7130 Panorama Dr.
Derwood MD 20855