Mail Archive Search: <+from:ToddRoberts2001@aol.com>

Results:

References: [ +from:ToddRoberts2001@aol.com: 90 ]

Total 90 documents matching your query.

21. [AMPS] care to take a guess..? Alpha problem (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Tue, 29 May 2001 23:41:12 EDT; Does he know if the wattmeter is reading correctly? 73 Todd Roberts WD4NGG . -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@c; /archives//html/Amps/2001-05/msg00506.html (8,133 bytes)
22. [AMPS] Buffer/Driver Stage for 4-1000 Amp (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Thu, 26 Apr 2001 19:23:44 EDT; I am planning to use one of those 90-100 watt solid-state rigs to drive a 4-1000 amp project. From what I can gather it appears that to be able to take full advantage of an all grounded-grid/ cathode; /archives//html/Amps/2001-04/msg00536.html (8,490 bytes)
23. [AMPS] Buffer/Driver Stage for 4-1000 Amp (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Fri, 27 Apr 2001 07:50:20 EDT; Thanks for everyone's comments and suggestions. The consensus seems to be just use 100 watts of drive with 4KV on the plate and you should be able to reach legal-limit output with a single 4-1000 tub; /archives//html/Amps/2001-04/msg00547.html (8,306 bytes)
24. [AMPS] Perforated Aluminum Sheet (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Thu, 8 Mar 2001 11:34:07 EST; I was getting ready to start building an aluminum chassis for an RF Deck and needed a source of perforated aluminum sheet to incorporate into the chassis for ventilation and RF shielding. I found a g; /archives//html/Amps/2001-03/msg00055.html (7,525 bytes)
25. [AMPS] Heat Sink Grease For GS-35B Tubes ? (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Sat, 10 Mar 2001 14:42:20 EST; Does anyone know if it would be a good idea to apply a small amount of heat sink grease to the mating surfaces before attaching the copper heat sink to a GS-35B tube? It looks like it must be critica; /archives//html/Amps/2001-03/msg00071.html (6,861 bytes)
26. Fwd: [AMPS] SB-220 High input SWR and transceiver fold back (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Wed, 21 Feb 2001 19:31:05 EST; --part1_a7.bebf8e6.27c5b7c9_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Do you have any kind of tuned input on the SB-220? A solid-state transceiver could be; /archives//html/Amps/2001-02/msg00295.html (11,084 bytes)
27. [AMPS] Filament Xfmr (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Tue, 27 Feb 2001 15:24:52 EST; Bruce, it is possible to tie one side of the filament circuit to ground return and it may work in some cases. In my own experience this caused objectional hum to be superimposed on the RF output sign; /archives//html/Amps/2001-02/msg00364.html (7,625 bytes)
28. [AMPS] Used 4-1000 Tubes (score: 1): Author: ToddRoberts2001@aol.com (ToddRoberts2001@aol.com); Date: Mon, 22 Jan 2001 23:30:00 EST; I am fairly new to tube amplifier building. A year ago I decided I would like to build an HF amplifier using one or two 4-1000 tubes. In the past year I have picked up 5 used 4-1000 tubes. 3 out of t; /archives//html/Amps/2001-01/msg00572.html (7,499 bytes)
29. Re: [Amps] RE: RangeMaster E-Bay Sale (score: 1): Author: ToddRoberts2001@aol.com; Date: Sat, 30 Oct 2004 14:58:07 EDT; In a message dated 10/30/2004 2:42:11 PM Eastern Standard Time, k5uj@hotmail.com writes: it turns out these people invest in apparently expensive elaborate audio gear for AM transmitters that operate; /archives//html/Amps/2004-10/msg00523.html (7,913 bytes)
30. Re: [Amps] Q meter [TSPA] (score: 1): Author: ToddRoberts2001@aol.com; Date: Fri, 7 Jan 2005 16:55:00 EST; In a message dated 1/7/2005 3:53:20 PM Eastern Standard Time, jtml@lanl.gov writes: The Q meters that use resonance of a component against a known standard capacitor or inductor are not so useful to; /archives//html/Amps/2005-01/msg00105.html (7,311 bytes)
31. Re: [Amps] Q meter [TSPA] (score: 1): Author: ToddRoberts2001@aol.com; Date: Sat, 8 Jan 2005 13:24:10 EST; In a message dated 1/7/2005 5:49:42 PM Eastern Standard Time, craxd1@ezwv.com writes: In my opinion, I dont think any instrument can measure the true unloaded Q exactly due to too many factors or var; /archives//html/Amps/2005-01/msg00127.html (8,548 bytes)
32. Re: [Amps] Ebay 4-400A chuckle (score: 1): Author: ToddRoberts2001@aol.com; Date: Fri, 11 Feb 2005 18:08:14 EST; How would all the guts tilt like that without the envelope shattering if it was dropped? Questions, questions......... The tube must have been bumped with just the right amount of G-forces to bend th; /archives//html/Amps/2005-02/msg00436.html (8,509 bytes)
33. Re: [Amps] Ebay 4-400A chuckle (score: 1): Author: ToddRoberts2001@aol.com; Date: Fri, 11 Feb 2005 18:36:52 EST; Don't wrap the tube up. You need to be able to see what you are doing as you are doing it. Hold the tube in one hand and give it some light thumps on the envelope on the opposite side to the bent pla; /archives//html/Amps/2005-02/msg00438.html (8,567 bytes)
34. Re: [Amps] Compact Coil Concept (score: 1): Author: ToddRoberts2001@aol.com; Date: Tue, 15 Feb 2005 00:24:09 EST; Five turns of #8, space wound 5 TPI on each layer 1" wide at a 2.5" average (2" - 2.5" - 3" layers) diameter would provide something in the vicinity of 17 uH. This is approximately double the inducta; /archives//html/Amps/2005-02/msg00522.html (7,301 bytes)
35. Re: [Amps] Re: compact coils... (score: 1): Author: ToddRoberts2001@aol.com; Date: Tue, 15 Feb 2005 14:58:16 EST; I tried that with my L4B for 160m, it worked, but the rods got very hot 73 Peter It has been my experience that ferrites and iron core cores tend to saturate and cause problems and heating in High-Z; /archives//html/Amps/2005-02/msg00533.html (8,056 bytes)
36. Re: [Amps] Re: compact coils... (score: 1): Author: ToddRoberts2001@aol.com; Date: Tue, 15 Feb 2005 20:16:13 EST; In a message dated 2/15/2005 5:17:34 PM Eastern Standard Time, N7HIY@comcast.net writes: The skin effect on 160m is almost nonexistent. RF current flow at 1.8 MHz is evenly distributed across the cro; /archives//html/Amps/2005-02/msg00537.html (7,739 bytes)
37. Re: [Amps] Removing enamel insulation? (score: 1): Author: ToddRoberts2001@aol.com; Date: Sun, 20 Feb 2005 19:55:05 EST; Is there a chemical that will do the job (dip/wipe)? I have used paint remover to do this. The gel kind works well. Put some paint remover into a metal bottle cap or some similar small container and; /archives//html/Amps/2005-02/msg00640.html (8,331 bytes)
38. Re: [Amps] Shipping Damage (score: 1): Author: ToddRoberts2001@aol.com; Date: Thu, 24 Feb 2005 13:32:36 EST; I wholeheartedly agree. I recently priced sending a large box 24"x24"x20" cross country. UPS Ground rates were $60 while FedEx Ground rates were about $30 if you take your package directly to their o; /archives//html/Amps/2005-02/msg00755.html (8,898 bytes)
39. Re: [Amps] Shipping Damage (score: 1): Author: ToddRoberts2001@aol.com; Date: Thu, 24 Feb 2005 13:54:38 EST; I forgot to mention one place that really has safe packing of heavy items down to a science is Fair Radio Sales in Lima, Ohio. They literally roll heavy items like transformers inside heavy cardboard; /archives//html/Amps/2005-02/msg00761.html (7,893 bytes)
40. Re: [Amps] shipping damge -- Guaranteed damage?? A dice roll? (score: 1): Author: ToddRoberts2001@aol.com; Date: Sat, 26 Feb 2005 16:28:51 EST; In a message dated 2/26/2005 3:49:23 PM Eastern Standard Time, donii@sympatico.ca writes: What am I to do when I have to ship a 60 pound linear? There is a niche developing for 'careful' shipping. I; /archives//html/Amps/2005-02/msg00864.html (8,643 bytes)

Current List: 21 - 40
Page: [1] [2] [3] [4] [5]