[R-390] Re: R390A meter movment current.

[Roy Morgan]

At 08:13 AM 10/12/2005, Mark Huss wrote:
>The audio meter is a standard 600 ohm VU meter.  0dB is 0dBvu (1mW into 
>600 ohm load)


That all means that the meter runs on alternating current from the audio 
line output.
  - it has a copper oxide rectifier inside the case
  - the actual DC full scale current and series resistance of the meter 
movement is not too critical

>The Signal Strength meter is a real odd-ball.  Worse, its DC resistance is 
>critical to the operation of the AGC.  the meter movement is 16.7 to 17 
>ohms.  and full-scale current is xxx.

Information I have indicates a one milliamp full scale movement.

Roy

- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Cell 301-928-7794
Work: Voice: 301-975-3254,  Fax: 301-948-6213
roy.morgan at nist.gov --