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Total 15 documents matching your query.

1. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 11 Mar 1999 14:28:38 -0600; Steve, Assuming total cath Z = 100-ohms, Q = 2 Shunt capacity reduces C values somewhat Band C1 C2 L from predicted 160 3300 2520 4.20 80 1700 1350 2.26 40 900 680 1.14 20 440 330 0.56 15 300 220 0.3; /archives//html/Amps/1999-03/msg00235.html (8,898 bytes)
2. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 11 Mar 99 15:03:28 -0600; 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Admi; /archives//html/Amps/1999-03/msg00237.html (9,097 bytes)
3. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 11 Mar 99 15:18:33 -0600; Before you guys start to criticize me, I MEANT to say FILAMENT choke. 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http:; /archives//html/Amps/1999-03/msg00238.html (8,413 bytes)
4. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: siezzi@aeronix.com (Steve Iezzi); Date: Thu, 11 Mar 1999 16:38:48 -0500; Any problem using 500 volt ceramic disc caps for the larger values and silver mica for the smaller ones. Steve KT4FY -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.; /archives//html/Amps/1999-03/msg00239.html (8,976 bytes)
5. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 11 Mar 1999 15:41:48 -0800; The disc ceramics should be NPO or N750 types, Steve Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contest; /archives//html/Amps/1999-03/msg00242.html (9,853 bytes)
6. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 12 Mar 1999 08:50:00 -0000; and I'd worry about the current rating of disc ceramics. If you have 100 watts in 50 ohms, that's 70 volts rms. The reactance of 3300 pF at 1.8 MHz is about 27 ohms, so there's getting on for 3 amps; /archives//html/Amps/1999-03/msg00244.html (9,178 bytes)
7. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: wlfuqu00@pop.uky.edu (William L. Fuqua III); Date: Fri, 12 Mar 1999 07:59:01 -0500 (EST); Why NPO? With Q=2 Bandwidth (-3db) of the tuned circuit is F/Q = .5*F or 50% 10% change in capacitance would only produce 5% shift in frequency. One advantage in using higher voltage capacitors is t; /archives//html/Amps/1999-03/msg00246.html (9,052 bytes)
8. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: wlfuqu00@pop.uky.edu (William L. Fuqua III); Date: Fri, 12 Mar 1999 08:01:33 -0500 (EST); I did fail to point out that it could be that NPO's are more desireable because they are usually physically larger than the cheaper caps. 73 Bill William L. Fuqua III P.E. E-mail WLFUQU00@POP.UKY.EDU; /archives//html/Amps/1999-03/msg00247.html (9,124 bytes)
9. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 12 Mar 1999 09:11:37 -0500; On Thu, 11 Mar 1999 16:38:48 -0500 "Steve Iezzi" <siezzi@aeronix.com> writes: Answer is sometimes. Commonly available disc ceramics have poor temperature tolerance at the higher values. At the 100W l; /archives//html/Amps/1999-03/msg00248.html (10,772 bytes)
10. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 12 Mar 1999 14:16:41 -0000; Carl, Wasn't it you who had the big Elmenco compression mica trimmers in stock? They should be fine for this application. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissio; /archives//html/Amps/1999-03/msg00249.html (8,518 bytes)
11. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 12 Mar 1999 07:30:31 -0800; The Q-method is Eimac's simplified version, which considers only the reactance of C1. The effective Q is higher. Ceramic bypass-type capacitors (includes 1000pF and 500pF, 5kV doorknob capacitors) h; /archives//html/Amps/1999-03/msg00252.html (8,977 bytes)
12. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 12 Mar 1999 15:34:58 -0000; -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.cont; /archives//html/Amps/1999-03/msg00253.html (8,841 bytes)
13. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 12 Mar 1999 11:22:44 -0500; NPO disc are rarely available above 220pf or so in 500V size. The 1KV units are most likely to be Y5P or SL Mica caps, OTOH, have been historically used in tuned circuits where RF heating is expected; /archives//html/Amps/1999-03/msg00254.html (9,555 bytes)
14. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 12 Mar 1999 10:58:34 -0500; I have never had to replace an input network silver mica in a commercial amp that was driven with <200W. Case size is important, the CD15 and CD19 500V units work very well. The smaller CD10 is not a; /archives//html/Amps/1999-03/msg00255.html (9,922 bytes)
15. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 12 Mar 1999 11:42:16 -0500; The ARCO 4200 and 4600 series are just fine at the 100-200W level Peter. The 300 series that I used to stock for higher power levels have been dropped for lack of sales and a relatively high price. 7; /archives//html/Amps/1999-03/msg00257.html (8,672 bytes)

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