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1. [Amps] Shorted PI-NET turns (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Thu Aug 7 06:44:55 2003; The current in the shorted turns is such that it produces a magnetic field opposing the magnet field in the rest of the coil. Or you may say that the shorted turns resist a change in the magnetic fie; /archives//html/Amps/2002-09/msg00333.html (9,778 bytes)
2. [Amps] HV LINE (score: 168): Author: wlfuqu00 at uky.edu (Bill L. Fuqua); Date: Sun Jul 6 09:04:03 2003; That is why you should keep the shield on it. We use RG 59 for up to 5KV DC. 73 Bill wa4lav I have used RG-8 inner conductor in many many HV applications .. just the insides.... worky worky, never a; /archives//html/Amps/2003-07/msg00046.html (6,965 bytes)
3. [Amps] 4CX250B/F (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Sat Jun 21 09:43:20 2003; My EIMAC data sheets even thought it does not specify a heating time, "--" where a value would be listed, for the 4CX250B or F (listed in same data sheet) said that it recommends that heater voltage; /archives//html/Amps/2003-06/msg00169.html (7,266 bytes)
4. [Amps] 4 x 807 (score: 168): Author: wlfuqu00 at uky.edu (Bill L. Fuqua); Date: Mon Jun 16 08:16:12 2003; No one is picking on you. Us old guys were always looking for a way to build cheap stuff. This was an unusual approach. If you did not want to modify the 1625's you could use 837 tubes instead (chang; /archives//html/Amps/2003-06/msg00104.html (9,054 bytes)
5. [Amps] It is a Gonset 500-W (score: 168): Author: wlfuqu00 at uky.edu (Bill L. Fuqua); Date: Thu Jun 12 07:46:29 2003; The amplifier with 4 807s was a Gonset 500-W. Grid driven amplifier with 750 volts on the plate and 375 volts on the screen and tuned grid. It had 275 watts PEP output. Not very much by today's stand; /archives//html/Amps/2003-06/msg00077.html (7,106 bytes)
6. [Amps] Henry 2K-5 to 3K-5 (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Mon Jun 9 21:52:28 2003; A Silent Key's estate contains a 2K-5 converted to a 3K-5 per the SK's notes. It now has a 8877 ( from a MRI) in it. Are details on such a conversion available so that I can check over his work befor; /archives//html/Amps/2003-06/msg00049.html (6,480 bytes)
7. [Amps] Roll your own RF plate chokes (F.S. 6" long 1" dia. ceramic insulators) (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Fri May 23 09:26:53 2003; The previous email about building a 4-1000A amplifier reminded me that I still have insulators. I have some 6" long and 1 " diameter Ceramic insulators that I will sell in multiples of 5 for $30 whic; /archives//html/Amps/2003-05/msg00171.html (7,377 bytes)
8. [Amps] See you at Dayton (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Fri May 9 08:47:31 2003; Are any of the group going to Dayton? If so are you bringing anything interesting? I'll be at 2904 and 2905 if you want to stop by and visit. 73 Bill wa4lav; /archives//html/Amps/2003-05/msg00070.html (6,310 bytes)
9. [Amps] G-G Amplifiers With No Tuned Input. (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Thu May 8 08:54:21 2003; /archives//html/Amps/2003-05/msg00059.html (8,457 bytes)
10. [Amps] G-G Amplifiers With No Tuned Input. (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Wed May 7 08:21:54 2003; At VHF the circuit is not really a T... Just look at the grid to cathode capacitance and it really comes out to be a L-PI circuit... 73 Bill wa4lav; /archives//html/Amps/2003-05/msg00058.html (8,934 bytes)
11. [Amps] G-G Amplifiers With No Tuned Input. (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue May 6 09:57:28 2003; Well, lets see.... If you have a filter with a center frequency of 1 MHz and a Q of .5 then the cut off frequency would be 2 MHz and lowest frequency would be Zero by the definition of Q= Center Freq; /archives//html/Amps/2003-05/msg00047.html (11,903 bytes)
12. [Amps] G-G Amplifiers With No Tuned Input. (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue May 6 09:57:06 2003; There are resonant pi networks and low pass filter pi networks...... These are resonant. If you perform a frequency plot of the output vs the input you will get a small signal up to the point of reso; /archives//html/Amps/2003-05/msg00038.html (12,171 bytes)
13. [Amps] G-G Amplifiers With No Tuned Input. (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue May 6 09:56:55 2003; The problem with a grounded grid or any RF amplifier that has a non-linear input impedance ie non-resistive is that the exciter is not loaded with the same impedance during the entire RF cycle. This; /archives//html/Amps/2003-05/msg00032.html (13,159 bytes)
14. [Amps] FS QRO stuff and more to come (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue Apr 1 16:42:20 2003; I have been put in charge of selling a bunch of stuff for our ham radio club (Bluegrass Amateur Radio Society) that was taken from a TV Broadcast Transmitter donated by WLEX TV here in Lexington. I h; /archives//html/Amps/2003-04/msg00009.html (6,680 bytes)
15. [Amps] T'bolt (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue Apr 1 13:24:08 2003; But it will bring a great deal more on the market than any Half KW modern day amplifier. Also, it will operate any band from 80 to 10 meters using passive input including WARC bands and any new band; /archives//html/Amps/2003-04/msg00008.html (7,835 bytes)
16. [Amps] TenTec+Nichrome (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Thu Mar 27 13:27:22 2003; It only means that 29MHz was heating up the resistors and no more. Most likely because circulating current was not only flowing thru the Plate tuning capacitor but also thru the plate to ground capac; /archives//html/Amps/2003-03/msg00879.html (8,280 bytes)
17. [Amps] 833A in linear for SSB (score: 168): Author: wlfuqu00 at uky.edu (Bill L. Fuqua); Date: Sun Mar 23 18:36:04 2003; In grounded grid a 304TL will provide a power gain of about 4.5. 200 watts drive for 900 watts output. I have considered 1 304tl driving 2 all in grounded grid. I have a lot of 304tls. 73 Bill wa4lav; /archives//html/Amps/2003-03/msg00803.html (9,820 bytes)
18. Fwd: Re: [Amps] Up thru the CB ranks (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Fri Mar 21 13:20:16 2003; To: <amps@contesting.com>; /archives//html/Amps/2003-03/msg00756.html (10,755 bytes)
19. [Amps] Up thru the CB ranks (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Fri Mar 21 10:53:36 2003; An 807 would probably oscillate cathode driven due to the fact that the suppressor (beam forming plates) are connected to the cathode internally thus providing a lot of plate to cathode capacitance.; /archives//html/Amps/2003-03/msg00754.html (8,300 bytes)
20. [Amps] 5 KW Heath SB-220 (score: 168): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Wed Mar 19 10:12:28 2003; If you look at his past sales he has been selling CB linears. One listed as a hot plate???? <http://cgi6.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=ViewListedItems&userid=colt20&include=0&since=30&sor; /archives//html/Amps/2003-03/msg00707.html (7,957 bytes)

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