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eHam Forums => Amplifiers => Topic started by: AH6RR on June 19, 2006, 05:50:44 PM



Title: Dentron MLA-2500 & GI-7B Tubes
Post by: AH6RR on June 19, 2006, 05:50:44 PM
Aloha All,
 
 I have just completed my conversion of my MLA-2500 to use the Russian GI-7B tube. I still have the swamping resistor installed but I also installed Rich AG6K's ALC mod for the 8875 tubes. I am getting 1KW on 75M, 800W on 40M & 20M but from there it drops a bunch 15 is 400W 10M is 250W all with 75W of drive. I have 30V of bias 2250V plate and 850 mils under full load idle is 90mils. Should I remove the ALC Mod or the swamping resistor or both? I have also installed the glitch resistor. Any help?
Thanks in advance.
Roland AH6RR