ORIGINAL MESSAGE: REPLY: If a person really does get a thrill out of it, fine, but that runs contrary to history. I hate to sound preachy, but the Industrial Revolution is the history of people speci
ORIGINAL MESSAGE: REPLY: You are assuming the load is a constant 3000 ohms, but the diodes see not only that load, but the load presented by a partially discharged filter capacitor during each replen
ORIGINAL MESSAGE: REPLY: If you are going to drop the supply from 3000 to 30 V, shouldn't you drop the load from 2200 to 22 ohms also? Even then, I'm not sure this is a correct simulation. It should
ORIGINAL MESSAGE: REPLY: Has anyone actually experienced a shorted filter C? Open C is far more common, in my experience. In more than 50 years of electronics I have never seen a shorted aluminum ele
ORIGINAL MESSAGE: REPLY: I have seen them too, but I believe in nearly all cases they were leaky, not shorted, and as a result overheated and exploded. Many of the ones I have seen continued to funct
ORIGINAL MESSAGE: REPLY: A dozen should do. Address at qrz.com. Thanks. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co
ORIGINAL MESSAGE: REPLY: I doubt if it was shorted. Most likely it was leaky and that caused it to overheat. One that is dead shorted is not likely to overheat at all. Ohm's law, ya know. :-) 73, Bil
ORIGINAL MESSAGE: REPLY: I think so too. That's probably why I've never seen one with a simple dead short. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contes
ORIGINAL MESSAGE: REPLY: Correct, in the theoretical sense. In the practical sense, anyone who has been troubleshooting long knows the difference between a shorted part and one that is leaky, and tha
ORIGINAL MESSAGE: REPLY: If I were you, I would hang on to them. They are rare as hen's teeth. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com htt
ORIGINAL MESSAGE: REPLY: When you're running high power, that will be true regardless of your antenna. Low power stations will hear you, you won't hear them. With a higher gain antenna, the HP vs LP
ORIGINAL MESSAGE: REPLY: "There are however other approaches offering better regulation performance (i.e. output voltage stability) at the expense of higher complexity and cost; in particular the Inp
ORIGINAL MESSAGE: REPLY: That's the smallest filter for a KW+ rig I have seen so far. Most amps use something around 50 uF. 73, Bill W6WRT _______________________________________________ Amps mailing
ORIGINAL MESSAGE: REPLY: The ones I am most familiar with are Alpha and Command. The smallest filter I have seen there is 35 uF and most are in the 50's. You state you have a 24 uF filter and are com
ORIGINAL MESSAGE: REPLY: Nonsense. If less capacitance was acceptable, it would be used simply for cost savings. Good engineers use the minimum amount required to get the job done. 73, Bill W6WRT ___
ORIGINAL MESSAGE: REPLY: I agree and would take it a step further. The higher the Q of the input circuit, the less tendency toward VHF parasitics. Why? A very low Q input circuit will be very braodba
ORIGINAL MESSAGE: REPLY: Maybe, maybe not. Have you considered that with poor regulation, the amp is more likely to "flat-top", and especially so when tuned up with a pulser and then used on voice? W
ORIGINAL MESSAGE: REPLY: My SB-1000 had a terrible "thump" at turn on. The thump was actually the cabinet, which is steel. Electrically, it was probably not an issue, but I installed a step-start cir
ORIGINAL MESSAGE: REPLY: I am sure in the case of a simple parallel resonant circuit. A pi-net, I don't know. Have not tried one at high Q. An 8877 is an excellent candidate for a simple parallel res
ORIGINAL MESSAGE: REPLY: A pulser has an exact duty cycle. What is the exact duty cycle of voice? 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com