Every Ameritron amp is being converted to this approach, mainly because the non-inductive carbons are getting almost impossible to fine. The AL-811H has had this as a standard suppressor for about t
Author: Carl Clawson" <ws7l@arrl.net (Carl Clawson)
Date: Fri, 3 Mar 2000 18:14:07 -0800
This is a misrepresentation, and I think you know it. The amp is in use, and drive, impedances, etc are changing from time to time. It's not just sitting there. The spurious oscillation hypothesis is
I'll take responsibility cause I said it! OK, perhaps I didn't make myself clear! If your amplifier has been tested to be stable over a variety of load conditions, etc. it won't suddenly break into o
When the manufacturers started producing suppressors made of one or two 2 watt carbon resistors and #12 wire for legal-limit amplifiers coincided with increased use of 10 meters due to the sunspot p
Others along with myself have successfully built 4-1000A amplifiers that run at high KV with no suppressor resistors. Nope, not magic, just clever designs. 73, Jon KE9NA -- Jon Ogden KE9NA Member: AR
Author: Carl Clawson" <ws7l@arrl.net (Carl Clawson)
Date: Mon, 6 Mar 2000 20:00:09 -0800
Jon, that was a good summary. One point I've been ranting on about, though, is that the amplifier is a nonlinear system and as such one must be careful applying linear analysis to it. Concepts such
Rather than try to describe it, why not go to my website, look at it and then ask questions. I've described what I did multiple times on AMPS. But every time I've described it to you Rich, you just i
That depends on whether or not your K-factor is the Linville stability factor or the Stern stability factor. Since K tends to be used for both, you need to define which. 73 Peter G3RZP -- FAQ on WWW:
least 50%. I feel you're right there, Phil. My 2 times 4-250A amp is the chassis from a Naval tx. The parasitic suppressors are 33 ohm glo-bar style resistors rated at 20 watts, and the coils are 14S
run I went Your site has no circuit description and no diagrams. Pictures alone don't get it. If your design is cleverer than other designs you need to show how other designers dropped the ball. che
Hi there We have recently purchased a second-hand Ameritron AL-811X amplifier. It works fine on all bands except 10/12m where it is difficult to output more than 300W without turning the anode parasi
28MHz poses a difficult balancing act for R-supp. in VHF suppressors. If L-supp is increased to improve suppressor performance, the dissipation in R-supp increases exponentially. If R-supp burns out
A lot could be happening. For one, Rich is correct in that the metal film resistors are better than carbons. But forget the ballyhoo about the nichrome. You don't need it. Trust me. Nichrome is meant
I have to disagree with you on that point Jon. I witnessed first hand, VHF spurs that were being generated by my friend's homebrew 2 X 813 amp.They were horrendous and if the FCC had been monitoring,
I still maintain that it is not needed in a properly designed amplifier. Rich told me that it would be impossible to operate my 4-1000A at 6 KV without nichrome. Well, I don't have any nichrome in it
All that is done is to cut a strap to make it work on 10/12 meters. Someone would have to be a real moron to mess that up. The resistors in my AL811H are burned and what a stench my amp makes when ru