REPLY: You also want the cap as close as possible to the (grounded) grid of the tube, which is the common return point for the RF being bypassed. is to install the bypass cap at the base of the plate
Bypass caps are cheap and good insurance. An interesting concept I saw in a commercial amp was each tube fed with its own plate choke with ends right at the anode cap. The B+ feed was on a small cer
ORIGINAL MESSAGE: REPLY: The RF will be flowing through the thickness of the chassis, both sides. This is not a transmission line or piece of coax. And the problem with the grid trip or other circuit
RF will not flow thru the chassis from one side to the other. Remember "skin effect"? 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
** Say what???? Carl _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
ORIGINAL MESSAGE: REPLY: II guess my padding caps, which are on one side of the chassis are not really connected to the load cap, which is on the other. Right? 73, Bill W6WRT ________________________
ORIGINAL MESSAGE: REPLY: Ummmmm..... perhaps you could be a wee bit more specific with your question? 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.
Not directly thru the chassis. Hear is a little example: http://www.w8ji.com/skindepth.htm 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://
ORIGINAL MESSAGE: REPLY: Ok, it seems my padding capacitors are not connected. I wonder how I am able to tune up on 160 meters? Seriously though, W8JI is injecting a signal on only one side of the sh
But it is relevant. It is the same thing. He has part of one surface conducting RF between the two terminals. Measuring on the other side of the sheet shows no current on the other side. If you thin
ORIGINAL MESSAGE: REPLY: Think about this: If you made a dipole out of flat bar instead of wire, you could feed just one side of the bar and have an antenna that radiated in only one direction. The o
What do you think happens when you use a tube for an antenna element? The whole element is charged. If you connect the feed line to only the front side of the element there is still current on the b
ORIGINAL MESSAGE: REPLY: You raise an interesting question about current in a tube as opposed to a solid rod. In a sire or solid rod, the skin effect current is only present on the skin. In a tube ho
Bill, My point is that there is no difference between the current on the outside of a tube verses the current on your flat bar or a solid rod. Each skin acts independently of the other. One side of
Following logically from what you both say, my guess is that the load capacitors are fed with current via a nut and screw or the like. The current running from one surface of the chassis, via the scr
Nope, it can't get there that way. Nothing can get "thru" the chassis plate. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin
Fascinating stuff, this. Each surface of the plate, then, has different currents flowing along it: take a large hole in the chassis and connect a thin wire from one side to the other only touching ea
. A screw can. Head on one side and the other side into a doorknob cap or a solder lug. Proof of JI's statements is the use of plated thru holes on printed circuit boards, especially when run at RF.
The tube socket holes are the natural path. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contes
ORIGINAL MESSAGE: REPLY: Imagine a large flat sheet of copper. You solder a wire in the center of it, and another wire on the other side, directly opposite the first one. Are you telling me that RF w