Then I'll change the subject line since you drifted off the original topic. Carl _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai
The antenna is the tank circuit? <:-)) 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
ORIGINAL MESSAGE: REPLY: If I had advertised a house for sale that would be changing the subject. We are still talking about the mobile rig with the antenna connected direct to the plate. 73, Bill W6
The thread started with the Ebay 3CX3000 amp. I changed the subject for you so YOU dont get confused. Carl _______________________________________________ Amps mailing list Amps@contesting.com http:
It was getting confusing as there were two different amps (The plasma generator using a 3CX3000A7 converted to 10, and the SB220 4 banger) PLUS the CB shootout. 73 Roger (K8RI) ______________________
We all know there HAS to be some kind of matching to get significant power transfer. It could be this simple: The rf choke could be sized to provide the needed inductance for an L match. The series c
ORIGINAL MESSAGE: REPLY: If the antenna impedance is the same or nearly so as the plate load impedance, no matching network is necessary. A half wave vertical has very high impedance and might be jus
With the shunt C from tube anode to ground there would not be a case for 50 +j0 right at the tube. Also, with tube in the discussion the plate load impedance would be a bit higher than 50 ohms anyway
I see some interesting applications for this type of antenna. You can have a 80 meter transmitter that will transmit on 80,40,20,15,10 meters and lots of other frequencies at the same time. Field str
Jo Jennings built an amp in the 60's that ran a mess of sweep tubes at 2KW PEP input. The output tank was a .01 cap. It was even published in QST. Carl KM1H __________________________________________
Did he not also build and publish a mobile amplifier using ceramic tubes that was built into the antenna? Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting
ORIGINAL MESSAGE: REPLY: Even with no matching network, I would still have a simple LC tank to provide the "flywheel" effect necessary when running anything other than Class A. A variable cap for cou
By adjusting the antenna length to be resonate at the exciter's frequency the antenna is that "tank circuit," it's just lossy by the radiation resistance. A variable coupling capacitor is not necessa
ORIGINAL MESSAGE: REPLY: I'll buy that. What would be the Q? 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l
Yes he did Phil, he had Eimac create a water cooled tetrode or him. Also a KW amp with a transformerless PS. And phased 75M verticals on his old Packard convertible in the 50's. He was rather creativ
ORIGINAL MESSAGE: REPLY: Upon further consideration, if the antenna impedance matched the tube's plate load impedance, wouldn't the Q be just one? I think you still need the simple LC tank circuit fo
The q of a halfwave dipole is about 10. Due to losses in a mobile mounted vertical the Q will be much less due to radiation resistance and ground losses due to the poor coupling to ground. However, t
What do you do with 75M phased verticals on a Packard? Must have been a long Packard. Bill wa4lav Yes he did Phil, he had Eimac create a water cooled tetrode or him. Also a KW amp with a transformerl
If I remember the article it was a way to split the power so he didnt have excessive coil heating. Nothing radical. These were mounted across the rear of the Packard on the top of the rear cowl. Carl
Q=X/R in a series circuit or R/X in a parallel circuit. Since at resonance there is 0 ohms X in the series circuit or infinite X in the parallel circuit, The Q would be 0 as in zero. No flywheel acti