[Amps] Passive Grid Resistor Source?

[gdaught6 at stanford.edu]

On 22 Aug 2006 at 14:12, Jennings wrote:

> I am thinking of a passive grid driven configuration for a GU74B/Tetrode Board amp. I could parallel a bunch of 2W carbon resistors to make up 50 ohms at 100 watts, but the physical size worries me. Has anyone got an "off the shelf" solution and source of supply or suggestions?

Lee, you might try to locate some TO-220 sized power resistors made 
by Caddock.  They mount on a heatsink, but they are compact and have 
low intrinsic inductance.  A couple of 100 ohm 50 watt units could be 
put in parallel, or two 25 ohm units in series.  I've used these 
resistors successfully in my 4cx1600b amp.  (See "Sunnyvale/St. 
Petersburg Kilowatt Plus in the ARRL handbook, 1999-2004.)

73,

George T. Daughters, K6GT