Rich says: > However, the 3/4 wave anode resonance is above the grid resonance. Then it doesn't meet the criteria for stability - viz, anode parasitic resonance lower than grid parasitic resonance. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com