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121. Re: [Amps] Question about low frequency tank coil forms? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Fri, 03 Sep 2004 16:44:50 -0400; Jason, I think you misunderstand, I'm speaking of slotting or drilling the insulated core/form and not the conductor. This would allow air to pass through the insulated form, around the back side of; /archives//html/Amps/2004-09/msg00064.html (9,866 bytes)
122. [Amps] Coil cooling for tubular coils. (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Fri, 03 Sep 2004 16:51:54 -0400; Another idea I thought of for tubular coils, to keep them super cool, would be to terminate one end through a hollow insulated standoff into a pressurized chassis. This would force air through the tu; /archives//html/Amps/2004-09/msg00065.html (6,557 bytes)
123. Re: [Amps] Coil cooling for tubular coils. (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 05 Sep 2004 10:00:37 -0400; Traian wrote: Hi Will, If you mean circulating the air trough inside the coils copper tubing, this shall be not so efficient. Considering the diameter (small) of the copper tubing used for the coils; /archives//html/Amps/2004-09/msg00075.html (14,837 bytes)
124. [Amps] Transceivers (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 05 Sep 2004 18:44:03 -0400; This is a little off topic but its for research ultimately in amplifiers. How many older receivers or transceivers, preferably tube type had the mixer circuits grid driven by the oscillators? I know; /archives//html/Amps/2004-09/msg00087.html (6,906 bytes)
125. Re: [Amps] ARRL Amplifier book (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 05 Sep 2004 19:04:20 -0400; Vic, Richard, and others, You don't reckon it could be that publishing such info anymore would be cutting the throats of the manufacturers who advertises with QST, etc? Hmmmmmmm, just a thought. I on; /archives//html/Amps/2004-09/msg00088.html (8,792 bytes)
126. [Amps] re cooling of coils (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 05 Sep 2004 19:31:04 -0400; Really, the cooling of the tank circuit can be done numerous ways. However, amateur equipment manufacturers look at the cost. They want to build an amp that they can get the most out of with the less; /archives//html/Amps/2004-09/msg00089.html (8,666 bytes)
127. Re: [Amps] re cooling of coils (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 05 Sep 2004 23:39:46 -0400; Rich, What is poor, is those junky 11 meter solid-state "contesting amps" floating around with better cooling than any amateur amplifier made now! The innards may be junk, but by cracky they do add t; /archives//html/Amps/2004-09/msg00093.html (14,555 bytes)
128. [Amps] ARRL Amplifier book (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 00:21:30 -0400; Phil, Another good source of big amps is from Henry and others used in RF heating applications and in wafer processing (semiconductors). They use these where they do brazing, and heat treating of sma; /archives//html/Amps/2004-09/msg00094.html (11,867 bytes)
129. Re: [Amps] Transceivers (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 00:46:03 -0400; Bill, Thanks for this, I sent you another e-mail privately. Best & 73's Will Matney Bill L. Fuqua wrote: It does seem strange to think of using a nonlinear divice to create in a linear fashion a sign; /archives//html/Amps/2004-09/msg00096.html (8,662 bytes)
130. Re: [Amps] Transceivers (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 02:53:37 -0400; Peter, This very technique was used by Yaesu in several tube transceivers I've found. It was shown in the book, "Understanding Radio" by the Untied States Armed Forces Institute, published in 1940 an; /archives//html/Amps/2004-09/msg00101.html (8,514 bytes)
131. [Amps] Re: re cooling of coils (Ian White, G3SEK) (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 03:16:13 -0400; Ian, I would think a set of louvered holes at the input for the blower air in the chassis would do it. That is if they were aimed in different directions from one to the other. This would make the in; /archives//html/Amps/2004-09/msg00103.html (9,204 bytes)
132. [Amps] open source RF Info was re cooling of coils (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 03:30:23 -0400; Bennie, I know that's true and you see it full blast all the time. Plus as you know, hosting aint cheap either. It's a shame how some take advantage of others work, mainly for profit or dont want to; /archives//html/Amps/2004-09/msg00104.html (9,158 bytes)
133. [Amps] Re: Amp Tutor 101.com (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 16:23:17 -0400; Hal, I wouldn't care to start one somewhere and do the web design. The provider I use is freewebs.com. It runs $30.00 a year minimum. It's easy to set up and they allow FTP. Most of these small ones; /archives//html/Amps/2004-09/msg00126.html (9,288 bytes)
134. [Amps] Quiet Cooling (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 19:24:26 -0400; Hal, and others, There may be a way of using baffles with an internal enclosed fan. Speaker cabinet construction uses some features where acoustic engineers design a majority of them in industry. Tha; /archives//html/Amps/2004-09/msg00130.html (11,902 bytes)
135. [Amps] New Panasonic Tube Radio (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 19:28:43 -0400; Amazing isn't it how audiophiles want that sound only a tube can make. This is good as maybe some tube manufacture might spring back up to fit the bill. There is a tube audio output board available f; /archives//html/Amps/2004-09/msg00131.html (7,884 bytes)
136. Re: [Amps] Quiet Cooling (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 21:42:09 -0400; Dog gone it, I had a big mouth full of coffee when I read this and it didn't get swallowed....LOL! I'm still laughing over that one. First thing hit me was her asking you if you still had it. Then yo; /archives//html/Amps/2004-09/msg00146.html (8,480 bytes)
137. Re: [Amps] New Panasonic Tube Radio (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 06 Sep 2004 21:51:08 -0400; Mark, You are exactly correct. Many hours of research has been put into designs of tube audio and guitar amps just for adding the required distortion. The largest and most popular bands will not have; /archives//html/Amps/2004-09/msg00147.html (8,587 bytes)
138. [Amps] Plate Load Impedance (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 07 Sep 2004 07:33:50 -0400; David, Generally, knowing what the output will be in watts and the duty cycle will determine the plate current. Then it's should be the plate resistance = plate voltage / plate current. Try using the; /archives//html/Amps/2004-09/msg00154.html (8,182 bytes)
139. [Amps] WLW (Whata Lotta Watts) (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 07 Sep 2004 06:52:44 -0400; Figured I'd show one more link to WLW outside of Cincinnati. She was (the old amp) fired up to 50 Kw on New Years 2000. http://hawkins.pair.com/wlw.shtml Will Matney _________________________________; /archives//html/Amps/2004-09/msg00155.html (6,540 bytes)
140. Re: [Amps] Quiet Cooling (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 07 Sep 2004 06:47:30 -0400; Paul, Actually it's the best method and the same used in broadcast tubes. Vapor cooling is another way to go. I always pondered water cooling one but never looked into the cost. Plus I was always won; /archives//html/Amps/2004-09/msg00156.html (14,927 bytes)

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