See http://www.cardwellcondenser.com/PAGES/jcsp17.html 154-9-1 is 3000v, 251pF, the same value used. cheerz, Jeff _______________________________________________ Amps mailing list Amps@contesting.com
** I would run it at 3100v, but only for SSB and CW. For RTTY, I would run less. . _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/ma
** Ste4f -- I find out how much with a high-potential breakdown tester. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listi
** The main thing is choose a Tune-C with less breakdown-V than the bandswitch - so that during a glitch the Tune-C will breakdown first and protect the more-delicate bandswitch. ____________________
** I'm looking forward to an innovation that will exceed the current 90% efficiency of Class E. With s 150% or so efficient amplifier, it should be practical to convert the DC current.that flows Bac
MLA-2500 ** This job can be performed by a Matsushita "RSD" RF reed relay. Bias T/R switching can be done by an optoisolator and a NPN switch transistor. ____________________________________________
** Don -- see Figure 7 on my Web site. Two spdt relays are needed for high-speed switching because there is currently no dpdt relay that is quick enough. ____________________________________________
** Spare tubes last indefinitely unless there is a micro-leak in a seal. If my amplifier used a tube that was still in production, I would not keep a spare, and I do not. -- Hazards to the 3cx800A7 a
** Is there a resistor in series with each swamper diode?... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
** Plastic-case transistors are pretty close. ** Are the relays screwed/bolted direct to the chassis? _______________________________________________ Amps mailing list Amps@contesting.com http://lis
** The most practical way to cool a 50-ohm terminating resistor is with moving water. Bird Co. makes a series of terminations that do this. A sealed 3" ABS tube - with glued-on inlet and outlet gard
** This post contains a typographical blunder -- i.e., Bird's running-water cooled terminations are made from metal, Not plastic. The one I am planning to build is constructed from standard plumbing
** The positive-floating V regulator circuit shown at: http://www.somis.org/D.a.08.GIF regulates to better than +/- 0.1%. I have used this circuit to regulate 6000V.. Since an FET pass element is ut
supplies ** Bias supply regulation is not a factor in Class AB1 since zero current is drawn from the bias supply. _______________________________________________ Amps mailing list Amps@contesting.co
** What is going to charge the capacitor at turn-on when the capacitor is at 0v? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai
** Dr. Schmidt: A Class AB1 bias supply can not be replaced by a capacitor. The bias supply needs to: be transformer-powered from the electric mains be adjustable, and have less than the max Z speci
** Because the tube needs to be biased to cutoff at turn-on or the tube will draw maximal anode current. For example, with 0v on the grid, a 4cx1500A draws c. 3A at 4000V. __________________________
** Steve -- A 4cx1500A needs c. 180v to cut the tube off. A transformer seems to be a bit more practical than a battery. _______________________________________________ Amps mailing list Amps@contes
** Ian -- For AB2, yes, but for AB1, control grid V-stability matters not since there is no grid current. ** Transformer secondary-winding resistance is inherently low with a FWD becaise only half a
Where does one purchase such? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps