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121. Re: [Amps] 2K Classic X roller problem (score: 1): Author: TexasRF@aol.com; Date: Mon, 17 Apr 2006 17:10:28 EDT; Maybe you could fabricate one from a piece of finger stock? 73, Gerald K5GW In a message dated 4/17/2006 4:06:50 P.M. Central Daylight Time, jbigham2@kc.rr.com writes: No supply of this spring like b; /archives//html/Amps/2006-04/msg00283.html (6,943 bytes)
122. Re: [Amps] Astron RS20A primary resistance (score: 1): Author: TexasRF@aol.com; Date: Mon, 8 May 2006 16:30:48 EDT; Since the primary current is half and the number of turns are two times, the resistance could be four times for 220v vs. 110vac. Perhaps your original 6 ohm reading is right on the money. 73, Gerald; /archives//html/Amps/2006-05/msg00045.html (11,308 bytes)
123. Re: [Amps] grid resonance (score: 1): Author: TexasRF@aol.com; Date: Mon, 7 Aug 2006 11:43:59 EDT; I agree with all of the above. Someone should have said this about 75 posts back to enlighten the multitudes of readers on the reflector. About 50% of the questions would not have had to be answered.; /archives//html/Amps/2006-08/msg00258.html (9,870 bytes)
124. [Amps] wanted: AEA MM3 (score: 1): Author: TexasRF@aol.com; Date: Tue, 22 Aug 2006 11:42:50 EDT; Please excuse my non-amps inquiry but this is a very active group that hopefully can help. I am looking for an AEA MM3 keyer for a microwave project. Anyone have one? Thanks/73, Gerald K5GW _________; /archives//html/Amps/2006-08/msg00594.html (6,308 bytes)
125. Re: [Amps] Is Amps still in existence? (score: 1): Author: TexasRF@aol.com; Date: Sun, 8 Oct 2006 12:24:09 EDT; Ian: How about no form at all? Can you increase the wire or tubing size and only use a form for winding purposes only -- then remove the form. With large enough wire or tubing, a form should not be r; /archives//html/Amps/2006-10/msg00053.html (8,921 bytes)
126. Re: [Amps] 8877 hipot (score: 1): Author: TexasRF@aol.com; Date: Thu, 12 Oct 2006 12:32:51 EDT; Hi All, A couple of years ago a friend gave me a never used still in the box 8877 with a date code from the late 80's. A quick check showed internal leakage starting with only 1600vdc with the tube c; /archives//html/Amps/2006-10/msg00090.html (8,294 bytes)
127. Re: [Amps] FW: Zener Bias Replacement (score: 1): Author: TexasRF@aol.com; Date: Tue, 7 Nov 2006 16:46:39 EST; Wonder if Frank, K2AW (Silicon Alley) still offers 50w zener diodes? He had quite good prices a few years ago when I needed some. 73, Gerald K5GW In a message dated 11/7/2006 3:33:12 P.M. Central Sta; /archives//html/Amps/2006-11/msg00110.html (9,880 bytes)
128. Re: [Amps] Alpha 99 question (score: 1): Author: TexasRF@aol.com; Date: Tue, 5 Dec 2006 15:12:52 EST; Just a wild guess on my part: zener tolerances are not wonderful, perhaps the zener in the 30v location is hand picked as needed to make the total voltage correct. 73, Gerald K5GW In a message dated; /archives//html/Amps/2006-12/msg00030.html (7,538 bytes)
129. Re: [Amps] 1 tube or two ?? (score: 1): Author: TexasRF@aol.com; Date: Sun, 11 Feb 2007 15:08:16 EST; Jim, by all means there is an advantage of running a single tube over two tubes; in fact there are several in your case: properly. While these losses are small, they are present. the $$ practice, but; /archives//html/Amps/2007-02/msg00190.html (10,167 bytes)
130. [Amps] General question on filament life: comments (score: 1): Author: TexasRF@aol.com; Date: Sun, 11 Feb 2007 18:01:59 EST; Wonder if any study has been given to the life of these lamps when the turn on current is limited. In other words, would the "about ready to fail" time be increased by providing some turn on current; /archives//html/Amps/2007-02/msg00197.html (9,774 bytes)
131. Re: [Amps] 4CX600A (score: 1): Author: TexasRF@aol.com; Date: Thu, 15 Feb 2007 18:50:32 EST; I have a 24 page Eimac brochure on the 4CX600 family of tetrodes. In the brochure they state that the initial members of this family is the 4CX600B and 4CX600J. There is no mention of a 4CX600A at al; /archives//html/Amps/2007-02/msg00255.html (7,099 bytes)
132. Re: [Amps] Switching PS for filaments? (score: 1): Author: TexasRF@aol.com; Date: Sun, 18 Feb 2007 10:42:25 EST; It may be 1 in 1000 but if you are the 1 you might well think the number is 1 in 1. After loosing the filament in a couple of 8877s and a TH347 over the years, I have become one of the fanatics! I as; /archives//html/Amps/2007-02/msg00271.html (8,846 bytes)
133. Re: [Amps] Switching PS for filaments? (score: 1): Author: TexasRF@aol.com; Date: Sun, 18 Feb 2007 14:14:16 EST; I'll get back to you in about 10 or 20 years and let you know if there have been any more filament failures. Tubes are expensive enough that I will spend the $10 to protect them even if it is an imag; /archives//html/Amps/2007-02/msg00274.html (9,199 bytes)
134. Re: [Amps] Getting rid of blower noise - an alternate coolingschemeusing the... (score: 1): Author: TexasRF@aol.com; Date: Thu, 22 Feb 2007 14:49:10 EST; Adding One part oxygen to two parts Hydrogen seems to stabilize both and makes a wonderful cooling fluid. 73, Gerald K5GW In a message dated 2/22/2007 12:39:53 P.M. Central Standard Time, rbonner@qro; /archives//html/Amps/2007-02/msg00362.html (9,998 bytes)
135. Re: [Amps] B&W FC-30 Filament Choke: EPILOGUE (score: 1): Author: TexasRF@aol.com; Date: Sun, 4 Mar 2007 09:39:36 EST; Hi All, is there no possibility of having the input matching network resonate with the FC30 filament choke to allow 160m operation? With the low impedances present it seems that the loaded Q would st; /archives//html/Amps/2007-03/msg00051.html (9,816 bytes)
136. Re: [Amps] Surge resistor (score: 1): Author: TexasRF@aol.com; Date: Wed, 21 Mar 2007 11:17:00 EDT; Rick, if the big resistor drops 100v at 2A then it must be 50 ohms, right? This is a typical value used in series with the high voltage lead to act as low frequency parasitic suppression circuit. An; /archives//html/Amps/2007-03/msg00279.html (8,771 bytes)
137. Re: [Amps] 8877 grid trip (score: 1): Author: TexasRF@aol.com; Date: Wed, 21 Mar 2007 11:48:46 EDT; If your amp has a standby/operate switch, you could use one pole of that to open the grid trip latch circuit. Actually having to push or operate some switch forces you to consider the possibility tha; /archives//html/Amps/2007-03/msg00282.html (8,194 bytes)
138. Re: [Amps] OT: Help for senior ham (score: 1): Author: TexasRF@aol.com; Date: Sun, 25 Mar 2007 09:15:59 EDT; Ed, everything needed for tower shields is available at your local Home Depot store. A sheet of 1/2" plywood cut into three pieces and painted with a good exterior house paint will last for years. A; /archives//html/Amps/2007-03/msg00334.html (8,002 bytes)
139. Re: [Amps] al1200 (score: 1): Author: TexasRF@aol.com; Date: Wed, 4 Apr 2007 21:56:58 EDT; Carl, I think the Ameritron manuals are a series of pdf files. If you are using a slow speed (dial up) internet connection it does go very slowly. The pdf file downloads never show you where you are; /archives//html/Amps/2007-04/msg00008.html (7,443 bytes)
140. Re: [Amps] WANTED: Heathkit Type solder lugs (score: 1): Author: TexasRF@aol.com; Date: Sat, 7 Apr 2007 15:17:20 EDT; These type solder lugs are readily available in many sizes from Mouser Electronics (_www.mouser.com_ (http://www.mouser.com) ). Anyone doing home repair and building should have one of their free cat; /archives//html/Amps/2007-04/msg00031.html (8,218 bytes)

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