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41. Re: [Amps] Solid state amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Thu, 31 Mar 2005 19:39:10 -0600
Of course you realize that running the DC through the transformer is disadvantageous because it creates a strong "B" field in the core which can drastically reduce the dynamic response of the DC/RF t
/archives//html/Amps/2005-03/msg00755.html (9,061 bytes)

42. 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 22:47:15 -0600
Will... Tubes in stand-by formation... Interesting idea... Sounds like a good line to give the FCC when they show up to see the twin 8877 amp in operation! <<Personally, I don't like cramming all tho
/archives//html/Amps/2005-03/msg00758.html (14,257 bytes)

43. Re: [Amps] Solid state amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Thu, 31 Mar 2005 22:55:30 -0600
<<This I dont understand as the same amount of DC current will still flow through the windings of the RF transformer if the DC is fed to its center tap like in all designs. Or are you speaking of con
/archives//html/Amps/2005-03/msg00759.html (13,384 bytes)

44. Re: [Amps] need a channel 11 VHF high band TX? tspa (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Fri, 1 Apr 2005 22:02:27 -0600
Give us a report after the visit... eh? Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com WebPage: www.wjschmidt.co
/archives//html/Amps/2005-04/msg00032.html (9,463 bytes)

45. Re: [Amps] Mine is bigger than yours (was: Re: Standby tubes(was:Evenmore power solid-state amp's)) (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 3 Apr 2005 10:59:48 -0500
This brings to mind a good story... When first licensed back in the late sixties as school kids, the FCC regs read such that the power input to the final stage of an amateur transmitter shall be no m
/archives//html/Amps/2005-04/msg00055.html (12,508 bytes)

46. Re: [Amps] Mine is bigger than yours (was: Re: Standbytubes (was:Evenmore power solid-state amp's)) (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 3 Apr 2005 14:29:41 -0500
You are just pulling my leg right? You see that even though the "Final Amplifier" could run legal power as specified in the regs... the driver stage could run (fill in the blank here)... and basicall
/archives//html/Amps/2005-04/msg00062.html (15,321 bytes)

47. Re: [Amps] Solid State Amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Fri, 8 Apr 2005 18:31:36 -0500
<<Plenty of melted gold, maybe not tiny balls, more like puddles>> Wow! If there is that much gold in 8877's... it makes me think I should start mining them! Sincerely, Dr. William J. Schmidt, II K9H
/archives//html/Amps/2005-04/msg00192.html (11,447 bytes)

48. Re: [Amps] Solid State Amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Fri, 8 Apr 2005 18:38:38 -0500
Not ready to "drink the Kool-aid" yet eh? Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com WebPage: www.wjschmidt.
/archives//html/Amps/2005-04/msg00193.html (11,062 bytes)

49. Re: [Amps] ebay and amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 10 Apr 2005 20:41:28 -0500
Or better yet.... I'll drive over and pick it up... heh heh heh.... Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.c
/archives//html/Amps/2005-04/msg00205.html (9,504 bytes)

50. Re: [Amps] ebay and amps (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 11 Apr 2005 20:31:31 -0500
Exactly! Maybe we should notify the REAL owner of that account? Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com W
/archives//html/Amps/2005-04/msg00221.html (9,870 bytes)

51. Re: [Amps] FS: Solid State HF Amp (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sat, 14 May 2005 12:28:29 -0500
<<Uses Eight 2SC2879 Power Transistors at 12VDC for 650W PEP.>> My conversions do a whole lot more than that! Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Di
/archives//html/Amps/2005-05/msg00170.html (9,820 bytes)

52. Re: [Amps] ARF1505 (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 23 May 2005 00:03:34 -0500
A couple of things here. I've used these for class AB amps, and they can be made pseudo linear... but only by running them at reduced voltage. Like all MOSFETs they have a negative temp. coef. The q.
/archives//html/Amps/2005-05/msg00263.html (11,585 bytes)

53. Re: [Amps] ARF1505 (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 24 May 2005 22:17:50 -0500
We are almost there... OH! BTW it won't fit in the socket. Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschmidt.com WebPag
/archives//html/Amps/2005-05/msg00279.html (9,113 bytes)

54. Re: [Amps] Harris RF-3230 (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Thu, 26 May 2005 22:59:31 -0500
Oh brother.... I have one of these systems, complete. BUT, I have never (read that never ever) have I seen the power supplies for this for sale separately. I have also never seen anyone successfully
/archives//html/Amps/2005-05/msg00308.html (8,309 bytes)

55. Re: [Amps] overvoltage (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 5 Jun 2005 21:04:22 -0500
Transorbs. Tell me which MOSFET and I'll tell you which transorb to use. Sincerely, Dr. William J. Schmidt, II K9HZ Trustee of the North American QRO - Central Division Club - K9ZC Email: bill@wjschm
/archives//html/Amps/2005-06/msg00043.html (8,311 bytes)

56. Re: [Amps] questions on my tranformer test (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Sun, 12 Jun 2005 14:11:50 -0500
I would think that the best way to tell is measure the wire size of the secondary winding. The second best way is measure he cross-sectional area of the transformer, as theoretically it is related to
/archives//html/Amps/2005-06/msg00074.html (9,102 bytes)

57. [Amps] Caps for sale (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Mon, 13 Jun 2005 01:21:46 -0500
I have a number of Sprague 50uf, 4KV oil filled caps that are excess to my needs. Part number is ESL-51528. All test perfect/ dusty from sitting in my basement.. $30 each plus shipping. 3" x 4" x 8".
/archives//html/Amps/2005-06/msg00085.html (6,885 bytes)

58. Re: [Amps] HV transformer test tspa (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Wed, 15 Jun 2005 17:34:16 -0500
<<I remember a trick from a now retired transformer designer from SNC (Oshkosh, WI)>> Yep, I had forgotten about that. I've used that too... and it does work. Sincerely, Dr. William J. Schmidt, II K9
/archives//html/Amps/2005-06/msg00123.html (35,709 bytes)

59. Re: [Amps] New SGC Mini Lini Uses Class E Technology (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 5 Jul 2005 23:23:50 -0500
It's not necessarily tuning that is the issue here.. but rather the frequency compensated gain characteristics. The band-width for these amps is quite tight. The Advanced Power Technology app notes a
/archives//html/Amps/2005-07/msg00028.html (13,964 bytes)

60. [Amps] Return (score: 1)
Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>
Date: Tue, 5 Jul 2005 23:36:20 -0500
By the way... thanks to everyone whom offered their condolences on the recent passing of my father. For those whom ordered capacitors before I left for the funeral, thanks for waiting. I've started s
/archives//html/Amps/2005-07/msg00029.html (6,851 bytes)

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