[R-390] Call for measurements - 100dB carrier reading

[Flowertime01 at wmconnect.com]

David,

Could a diode and cap be used to make DC from the 6.3 volt filament line?
Then a resistor and LED with its voltage drop from this new DC source be used 
as a reference voltage to R523 the Carr Meter Adjust. I'm thinking about 1.2 
volts and 10 - 20 ma through the LED as a reference point for one end of the 
meter circuit. 

Carrier Meter Current is in parallel with R548 a 27 ohm resistor in the 
cathode of V506A a 5814. Cathode current is under 22 Ma.

I am open to us measuring the current of V506A for various Carrier Meter 
readings.

Then we could do a new table of substitute meters, with the meter full scale 
current and the value of resistor we should use with that meter for R548.

On the other end of the meter we would have a voltage set point source to be 
used as a reference voltage to R523 the Carr Meter Adjust.

If we measure and publish the voltage and current of R548 with an open meter 
circuit, we could then pick substitute meters and calculate the value needed 
for R548 to fit with the new meter current.

Dave, I think any thing you do is good and useful to those that want to or 
need to go down this path. I like the stuff we are learning about the AGC 
circuits. I think this is one of the best threads going in some time.

Roger L. Ruszkowski AI4NI   </HTML>