Mail Archive Search: <+from:garyschafer@comcast.net>

Results:

References: [ +from:garyschafer@comcast.net: 654 ]

Total 654 documents matching your query.

281. [Amps] 3-400Z ZSAC (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Thu, 15 Mar 2007 21:26:09 -0400; Can anyone tell me what the ZSAC should be on a pair of 3-400Z tubes at 3000 volts? Thanks Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://list; /archives//html/Amps/2007-03/msg00174.html (6,756 bytes)
282. Re: [Amps] 3-400Z zsac tspa (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 16 Mar 2007 17:14:10 -0400; Hi John, Thanks for the info. I finally found the data sheet online. It shows 100 ma each at 3kv with zero bias and 73 ma at 2500 volts. I had gotten a few replies with various amounts of current. Bo; /archives//html/Amps/2007-03/msg00183.html (10,185 bytes)
283. Re: [Amps] ! (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 16 Mar 2007 20:28:08 -0400; Not if you want them to last very long. They should show no color. 600-700 watts out on 10 meters is pretty aggressive. I wouldn't expect more than 500 watts out on 10 meters on a pair. 73 Gary K4FMX; /archives//html/Amps/2007-03/msg00190.html (7,590 bytes)
284. Re: [Amps] Stupid questions... (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Tue, 20 Mar 2007 21:47:50 -0400; It can be surprising how much is learned by many because of a so called "stupid question". I am constantly amazed at how many people seem to proclaim the "expert status" and stumble over things that; /archives//html/Amps/2007-03/msg00271.html (10,362 bytes)
285. Re: [Amps] Surge resistor (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Wed, 21 Mar 2007 12:11:13 -0400; Dare we say that a glitch can also be caused by a parasitic oscillation. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c; /archives//html/Amps/2007-03/msg00283.html (10,781 bytes)
286. [Amps] Bee's wax to hold screws (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Thu, 22 Mar 2007 18:55:39 -0400; I have to share this with others as it worked so well. While working on an amplifier I had some small screws to remove and replace that were buried deep where you could only get a screw driver in and; /archives//html/Amps/2007-03/msg00306.html (7,292 bytes)
287. [Amps] TMC amp toroid tank (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Mon, 26 Mar 2007 18:20:12 -0400; I have an old TMC (LPA-1k) amplifier that I am getting going. It has a toroid tank coil for all bands 1.6 MHz to 18 MHz. It has a pair of 3-500Z in it with 3000 volts at 700 mills. On 160 the efficie; /archives//html/Amps/2007-03/msg00348.html (7,238 bytes)
288. Re: [Amps] TMC amp toroid tank (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Mon, 26 Mar 2007 21:27:43 -0400; Hi Tom, I could see really killing it if the turns were shorted but this amp uses taps on the toroid coil it does not short the turns. The core is about 2 1/2 inches in diameter and about 3 inches i; /archives//html/Amps/2007-03/msg00357.html (9,285 bytes)
289. Re: [Amps] TMC amp toroid tank (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Mon, 26 Mar 2007 22:22:51 -0400; Yes you are right Tom. It gets taped from the antenna side as a normal tank coil would. No progressive shorting. So on 20 meters most of the coil is shorted. It seems to work very well on 160 and 80; /archives//html/Amps/2007-03/msg00359.html (8,532 bytes)
290. Re: [Amps]8877 blower requirement...TXN ! ?Now..Airflow sensing ? (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Tue, 10 Apr 2007 11:01:26 -0400; I have an amplifier with a vane in it to detect air flow. It operates a small micro switch and is very sensitive. If you make the arm on the vane long it gives more torque to operate the switch. 73 G; /archives//html/Amps/2007-04/msg00054.html (9,630 bytes)
291. [Amps] Ceramic capacitor ratings (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Thu, 12 Apr 2007 12:58:01 -0400; Working on my TMC amp with the pair of 3-500Z finals and the toroid tank coil. 1.6-18 MHz. I tried a tank coil for 20 meters that I made out of ¼ inch copper tubing, 2? diameter and 8 turns. I; /archives//html/Amps/2007-04/msg00094.html (7,919 bytes)
292. Re: [Amps] Ceramic capacitor ratings (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 13 Apr 2007 11:11:50 -0400; Hi Dan, Thanks for the reply. I did run across your old post on the subject however I am not sure you were talking about the same capacitors that I have. I found on the rf parts web site the 850s cap; /archives//html/Amps/2007-04/msg00106.html (11,219 bytes)
293. Re: [Amps] Ceramic capacitor ratings (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 13 Apr 2007 11:20:57 -0400; Hi Peter, I think my working Q has gone up also with the addition of the large copper coil as tuning is sharper than before. I measured the total capacitance of the plate tune circuit with the coil r; /archives//html/Amps/2007-04/msg00107.html (9,445 bytes)
294. Re: [Amps] Ceramic capacitor ratings (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 13 Apr 2007 18:11:14 -0400; Hi Manfred, Thanks for the comments. I understand what you are saying about the current thru the capacitor by using the plate voltage to figure the current thru its reactance but isn't there also cir; /archives//html/Amps/2007-04/msg00111.html (12,430 bytes)
295. Re: [Amps] Ceramic capacitor ratings (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 13 Apr 2007 18:31:38 -0400; Hi Peter, But isn't loaded Q also dependent on coil loss and circulating current dependent on loaded Q? See my comments to Manfred. 73 Gary K4FMX _______________________________________________ Amps; /archives//html/Amps/2007-04/msg00112.html (9,257 bytes)
296. [Amps] Tank circuit Q (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sun, 15 Apr 2007 21:40:04 -0400; Thanks for the help on capacitor current. I think I have that figured out now but I am still not sure what happens to tank Q. When designing a tank circuit we first find what the load impedance shoul; /archives//html/Amps/2007-04/msg00155.html (7,521 bytes)
297. Re: [Amps] Tank circuit Q (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Mon, 16 Apr 2007 12:31:02 -0400; Hi Tom, Thanks for your reply. Yes it does get confusing when you try to understand the full meaning of what really happens. All the stuff that I am reading about figuring tank Q only mentions load i; /archives//html/Amps/2007-04/msg00169.html (11,727 bytes)
298. [Amps] CRL capacitor specs (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Tue, 17 Apr 2007 11:12:17 -0400; Does anyone know where I can find specs on the CRL 850S and 857 ceramic capacitors? I found some current specs on the rf parts site but would like to find more specs. Thanks Gary K4FMX ______________; /archives//html/Amps/2007-04/msg00179.html (6,428 bytes)
299. Re: [Amps] ceramic capacitor specs. tspa (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Tue, 17 Apr 2007 18:13:32 -0400; Thanks John, I found info on the High Energy site but did not see anything but vacuum capacitors on the Jennings site. 73 Gary K4FMX _______________________________________________ Amps mailing list; /archives//html/Amps/2007-04/msg00183.html (9,629 bytes)
300. Re: [Amps] Tank circuit Q (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Tue, 17 Apr 2007 18:26:54 -0400; I am loading the amp for maximum output with either tank coil installed. Plate voltage is right at 3000 volts at 700 ma. Plate current may have been slightly different in one case but not much if any; /archives//html/Amps/2007-04/msg00184.html (16,244 bytes)

Current List: 281 - 300
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]