Re: [Amps] Parasitic Oscillation

["David Lisney" <g0fvt@hotmail.com>]

Hi, I stumbled across an enlightening article discussing the construction of 
a twin 4-400 amplifier, it seems the prototype had a parasitic problem at 
160Mhz, it seems the fix was found referring to an Eimac engineering 
bulletin of the time. The article appeared in QST, April 1957... completed 
amplifier used a series tuned circuit with damping resistor from the tube 
grids to ground, incidentally it used NO parasitic stopper in the anode.

73 de David
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