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

[Barry]

I think the FS current on the Carrier Level meter is 1ma.  Yes, the rub is
the internal resistance.

Barry - N4BUQ

----- Original Message ----- 
From: "Mark Huss" <mhuss1 at bellatlantic.net>
To: <Flowertime01 at wmconnect.com>
Cc: <r-390 at mailman.qth.net>
Sent: Wednesday, October 12, 2005 7:13 AM
Subject: Re: [R-390] Re: R390A meter movment current.


> The audio meter is a standard 600 ohm VU meter.  0dB is 0dBvu (1mW into
> 600 ohm load)
> 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.  Jan Skirrow
> http://www.skirrow.org/Boatanchors/ uses an eight-pin op-amp to convert
> between the meter circuit and the meter you happen to have.
> Flowertime01 at wmconnect.com wrote:
>
> >Fellows,
> >
> >I do not have a R390A parts manual so I need some help.
> >
> >What is the meter current for the R390A line level meter and the signal
> >strength meter?  I don't need an exact value. What is the nominal or
specified full
> >scale current?
> >
> >Hell I do not think I ever knew, the little critters either worked or I
got a
> >new exact replacement from supply. I never use to care how much current
it
> >needed to peg the needle to the right side.
> >
> >Thanks
> >
> >
> >
> >
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