[R-390] R390 progress 6AK5/6AJ5

[Barry]

I have a nice, large meter from a old piece of HP test equipment (don't
recall the model) that reads dB @ 600 ohms.  I connected it across the line
output with a diode and it reads very closely to the reading on the Line
Level meter.  I might have to make just such a test box.

Barry - N4BUQ

> >Start hanging a DC volt meter on the diode load. You are looking for -7
> >volts....
> >Hang a 600 ohm 1 watt resistor on the audio output and an AC volt meter
with
> >a DB scale across the audio output and resistor....
>
> These two functions could be built into a small box: two panel meters, one
> for diode load voltage and one for audio output.  In a  well stocked
junque
> boxe you can unearth a couple of meters of just the right scale markings
> and a nice slope-fronted box to mount them in. Label the thing "R-390
> Series Receiver Test Boxe"  Add a nice long shielded cable with spade tips
> on it and you can wrestle the radio around all over the bench and not
knock
> over your meters.
>
> (Note to self: Follow own advice. Head for Junque Boxe asap.)
>
> 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 --