"PrecisionmachinisT" wrote in message
...

wrote in message
...

in college I learned how to design with vacuum tubes.

Identify the value of component Rk in the following item:
http://www.ebay.com/itm/RCA-TUBE-AMP...-/150984104264

Rk = Vg/Ip

In the movie "The Red Tent" the stranded aviators substituted pencil
lead for a broken one in their radio.