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References: [ +from:bill@wjschmidt.com: 86 ]

Total 86 documents matching your query.

21. Re: [Amps] Grid driven Multi-band amp using 4-1000 (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Wed, 19 Jan 2005 20:28:27 -0600
Finish your thunderbolt project and you will know what gain is all about. Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC "Collector of Edi
/archives//html/Amps/2005-01/msg00390.html (10,547 bytes)

22. Re: [Amps] Quick 220 outlet? (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 8 Feb 2005 23:06:27 -0600
Aren't we done with this hillbilly electrician stuff yet? If you can't wire up a 220 outlet by now, better sell the amp and tear up your ticket. Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of
/archives//html/Amps/2005-02/msg00330.html (12,075 bytes)

23. Re: [Amps] Output Filter PCB Available for Solid State Amp (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 13 Feb 2005 20:44:28 -0600
A couple of comments on your filtering approach: 1. There are better filter designs today than those published in Helge's paper (which he admits in his papers). I agree the Rockwell Collins HF-80 ser
/archives//html/Amps/2005-02/msg00469.html (11,341 bytes)

24. Re: [Amps] Creative Electronics 2500-E Amp (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sat, 19 Feb 2005 00:45:45 -0600
I've had experience with these... they work! Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com WebPage: www.wjschmi
/archives//html/Amps/2005-02/msg00590.html (9,107 bytes)

25. Re: [Amps] how to measure impedence ?? (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sat, 19 Feb 2005 11:02:59 -0600
Lets say you wanted to measure the transistor side impedance of the transformer: 1. Put a resistor across the secondary (output) side to mimic the load, typically 50 ohms. 2. Use am Autek/ MFJ impeda
/archives//html/Amps/2005-02/msg00595.html (9,311 bytes)

26. Re: [Amps] 3-1000Z Filament Voltage Question (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 20 Feb 2005 12:42:39 -0600
A plate voltage of 2700V is a bit low to make any serious power with a 3-1000Z. 3500V is a better place for it to run. Maybe try the 208 VAC tap? Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of
/archives//html/Amps/2005-02/msg00627.html (15,624 bytes)

27. Re: [Amps] [BULK] - Re: Shipping Damage (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Fri, 25 Feb 2005 18:55:25 -0600
You folks need to read the fine print (from http://www.ups.com/content/us/en/resources/service/terms/service.html ): UPS will not be liable for or responsible for loss or damage to: articles of unusu
/archives//html/Amps/2005-02/msg00835.html (11,512 bytes)

28. Re: [Amps] [BULK] - Re: Shipping Damage (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Fri, 25 Feb 2005 20:54:01 -0600
<<If the package is determined to be packed properly by the people running the UPS receiving desk, after you pay your insurance fee, they'd then be Sorry Will... it's still up to you to prove that th
/archives//html/Amps/2005-02/msg00839.html (16,096 bytes)

29. Re: [Amps] close to off topic - how to read antenna R + jX ?? (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sat, 26 Feb 2005 23:21:19 -0600
This is correct with the RF-1. They do make a more expensive model which gives real and imaginary parts directly however... Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QR
/archives//html/Amps/2005-02/msg00881.html (12,272 bytes)

30. Re: [Amps] AL-1500 Circuit Diagram (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 1 Mar 2005 19:43:08 -0600
** I'm posting this for K0DD.... Reply to him at rbonner@qro.com ** He's right, there is no reason to do that. My 77DD amplifiers drove only the cathodes and it only takes a single 1 amp RFC per tube
/archives//html/Amps/2005-03/msg00013.html (11,470 bytes)

31. Re: [Amps] Bird Element Calibration? (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 20 Mar 2005 18:21:04 -0600
I'll relate a story that pertains to Bird's calibration skills of late. About four years ago, I acquired a Henry 4K Ultra that was hit by lightening. Henry elected to use a special pre-built Bird lin
/archives//html/Amps/2005-03/msg00439.html (11,542 bytes)

32. Re: [Amps] Measuring RF Power (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 28 Mar 2005 08:39:21 -0600
I agree.... Lots of good discussion. Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com WebPage: www.wjschmidt.com "
/archives//html/Amps/2005-03/msg00629.html (16,384 bytes)

33. Re: [Amps] Measuring RF Power (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 28 Mar 2005 19:22:58 -0600
Agree, but only if we do the same for: 1) parasitic oscillation suppression, 2) the proper way of connecting 220 VAC to an amp, 3) how to calculate L, C, make coils, etc., 4) what does grounded grid
/archives//html/Amps/2005-03/msg00643.html (20,036 bytes)

34. Re: [Amps] Transistor amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 28 Mar 2005 19:38:41 -0600
Frequency response rolls off too much for those transistors. They were made to work below 2 mhz. HOWEVER, there are the high voltage mosfets from Advanced Power Technology that work in the 300-1,200
/archives//html/Amps/2005-03/msg00647.html (8,526 bytes)

35. Re: [Amps] Solid State HF High power linear amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 28 Mar 2005 23:45:15 -0600
Hence the Pi-L circuit for tubes to clean them up too... There are a lot of misconceptions about solid state amps on channel. I have built a many of them... and I will never back to tubes for power l
/archives//html/Amps/2005-03/msg00658.html (17,182 bytes)

36. Re: [Amps] Solid State HF High power linear amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 29 Mar 2005 01:05:53 -0600
I personally have gravitated towards 2SC2879's, MRF120's, and MRF455's for the car... the 2SC2879's are 14 VDC devices and are super dirt cheap in quantity.... even from a high-buck place like RF Par
/archives//html/Amps/2005-03/msg00661.html (22,182 bytes)

37. Re: [Amps] Transistor amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 29 Mar 2005 01:07:33 -0600
Check these out... I just uploaded them to my website. They make fine CW amps... need a little work for SSB... but not much! http://www.wjschmidt.com/ham/apt9502.pdf http://www.wjschmidt.com/ham/apt9
/archives//html/Amps/2005-03/msg00662.html (11,974 bytes)

38. Re: [Amps] Transistor amp's (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 29 Mar 2005 21:55:16 -0600
Yeah... why not? Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com WebPage: www.wjschmidt.com "If computers get too
/archives//html/Amps/2005-03/msg00711.html (8,149 bytes)

39. Re: [Amps] transformer company info? (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Wed, 30 Mar 2005 18:41:05 -0600
They are out in LA... Northridge or close to it. I was just there 2 weeks ago. Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@
/archives//html/Amps/2005-03/msg00734.html (8,011 bytes)

40. Re: [Amps] Even more power solid-state amp's (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Thu, 31 Mar 2005 19:16:05 -0600
<<In addition, the solid state amplifiers can be replaced without any need to go off the air. >> A major plus when broadcasting time can command hundreds of thousands of dollars per minute. Some amps
/archives//html/Amps/2005-03/msg00754.html (10,339 bytes)

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