I agree. For small projects I've been printing full color with a black background on regular paper with a really good laser printer I have access to. Laminate the paper, trim and glue it to the panel
Posted to both Amps and Tower Talk: Found this 3 part article on impedance matching which I thought would appeal to a broad audience. http://electronicdesign.com/content/tabid/57/catpath/communicatio
It's an acrylic. Certainly far less brittle than ceramic. More brittle than polycarbonate. Hard for me to think of anything that can be thermoformed at a reasonable temperature (150 C) as brittle. Al
ESR is a good indicator for end of service life. With an ample current source, increased resistance = more power dissipated in the component = more heat = more boom. Increasing ESR is usually accompa
Manfred, If you don't mind, could you briefly describe your cooling system? Is it tap water through the heatsink straight to the sewer or a closed loop? If the latter, could you please describe the c
No, at least not if you want any kind of accuracy. Germanium diodes have a nominal forward biased voltage drop of about 0.3 volts - silicon is 0.7. Al AB2ZY Check the germanium diode that provides th
Although I understand the point being made, filter capacitors, no matter how large, do not provide "regulation" any more than a big flywheel takes the place of a governor on an engine. Regulation req
To continue the physical analogy, you're describing damping, not regulation. Adding mass to increase inertia may mimic the results of regulation, but only if the time interval of the measurement is r
A couple of years ago I sold a 475 at a hamfest identical to the one I'd used for several years as a young engineer fresh out of college in the mid 1970's for $75 less probes. I purchased a mid-80s 4
Isn't this 101 days too late?? Al AB2ZY Actually, doesn't the RF bounce around inside the ball and exit in random directions? -- Jack, W6NF Silver Springs, NV DM09ji _________________________________
In context, I took it to mean 100% lead free, which is what is required to meet the idiotic RoHS requirements. Al AB2ZY REPLY: Silver melts at 1571 degrees F. A temp that high would probably destroy
By definition, current flow is the flow of charges. The fact that negative charges are embodied by a particle (an electron) is interesting, but irrelevant. Negative charges flow in one direction; pos
If a negative charge flows left, then a positive charge appears to flow right. Yes, only the electron "physically" moves. As I said, it's an arbitrary engineering convention, most likely born from th
You're both confusing the carrier of a charge with the measure of charge. While electrons carry charge in a metal conductor, ions do the same thing in an electrolyte. It's still current. The sign of
Beef is quite well done at 200F. Beef at 400F would, at best, be jerky. More likely, shoe leather! What's wrong with good old glass-epoxy? Al AB2ZY I think the temp rating of those cutting boards is
Contains alcohol, anti-freeze and an acid that may etch aluminum. A lot of the industrial ink jet printers don't use an ink at all; many are polymers. Think toner. Try acetone, toluene or MEK (methy
I'd never heard of the stuff. I looked at a random MSDS here: http://www.goofoffstainremover.com/product-information and assumed they were all pretty much the same. If it has acetone (and no abrasive
Switching power supply design has evolved significantly since the 1970's. I don't find anything I currently have in service a source of any RF noise, and I live in a very QRN quiet area. Al AB2ZY __
I own an AL-600. I don't currently use it as I don't have the operating space for it right now. It was fine for the kind of DX chasing I could realistically do at the old home QTH with an HF2V vertic
"Rotary logic" had it's day - and its day has come and gone. A rotary switch with a semicircular arc for the movable contact instead of a single finger was probably used. You used to see all sorts of