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61. Re: [Amps] Tubes vs. Solid State (score: 1)
Author: "Roger (K8RI)" <>
Date: Tue, 01 May 2012 22:39:39 -0400
IF and I have to emphasize the IF these transistors were rugged enough for prime time and I'm quite willing to take your word on the power you are getting out, the manufacturers would be jumping on t
/archives//html/Amps/2012-05/msg00045.html (17,278 bytes)

62. Re: [Amps] amps with vacuum pumps (score: 1)
Author: "Roger (K8RI)" <>
Date: Wed, 02 May 2012 13:32:27 -0400
They are sealed systems just like the heat pipes on CPU coolers. Otherwise you'd just end up with the coolant vaporizing and then condensing in the vacuum pump oil. 73 Roger (K8RI) www.rogerhalstead.
/archives//html/Amps/2012-05/msg00067.html (7,370 bytes)

63. Re: [Amps] brittle shields? and soldering vs crimping (score: 1)
Author: "Roger (K8RI)" <>
Date: Wed, 02 May 2012 17:01:27 -0400
If you overheat copper you are getting it way too hot. and probably damaging the dielectric as well. Overheated copper becomes soft. Today's popular cables uses braid plus foil and that braid is extr
/archives//html/Amps/2012-05/msg00088.html (15,375 bytes)

64. Re: [Amps] Tubes vs. Solid State (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 03 May 2012 18:20:20 -0400
There's usually more money in high volume, lower price and these new devices look like they lend themselves well to less protection, lower price, fast build . Of course that'd mean more legal limit a
/archives//html/Amps/2012-05/msg00134.html (9,249 bytes)

65. Re: [Amps] Fwd: Re: soldering vs crimping (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 03 May 2012 21:28:38 -0400
My solder techniques are much more sophisticated. I use a box cutter. 73 Roger (K8RI) _______________________________________________ Amps mailing list
/archives//html/Amps/2012-05/msg00144.html (10,195 bytes)

66. Re: [Amps] Fwd: Re: soldering vs crimping (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 03 May 2012 22:08:50 -0400
That's the advantage of that old tried and true coax. With many of the new LMR and CNT cables you have to carefully score the jacket and then break it. I think you could ruin the braid with a rough f
/archives//html/Amps/2012-05/msg00147.html (11,939 bytes)

67. Re: [Amps] Fwd: Re: soldering vs crimping (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 03 May 2012 22:12:18 -0400
See how much more advanced us rich farmers were. My folks installed indoor plumbing just before I came along. Unfortunately that last sentence is not a joke. <:-)) 73 Roger (K8RI) ___________________
/archives//html/Amps/2012-05/msg00149.html (8,427 bytes)

68. Re: [Amps] Why are we building amps rather then transmitters? (Tubes vs. Solid State) (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 03 May 2012 23:52:28 -0400
Viking had a legal limit transmitter (Invader 2000?) while Hallicrafters had a legal limit transceiver, the SR2000. I have a top of the line transceiver the Yaesu FTDX5000MP and what was a leading tr
/archives//html/Amps/2012-05/msg00153.html (14,534 bytes)

69. Re: [Amps] soldering vs crimping (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 04 May 2012 03:01:32 -0400
If I've followed correctly so far: We're talking N connector center pins. I trim every thing to length and then solder and/or crimp the pin to the the center conductor. Then insert the cable until th
/archives//html/Amps/2012-05/msg00155.html (12,882 bytes)

70. Re: [Amps] Antenna tuner loss (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 04 May 2012 03:32:15 -0400
And there are people out there that didn't expect this? They are running into low impedance loads which means high currents and high losses. I believe the Palstar manual even mentions this. Also the
/archives//html/Amps/2012-05/msg00156.html (7,555 bytes)

71. Re: [Amps] LDMOS Solid State Amplifiers (score: 1)
Author: "Roger (K8RI)" <>
Date: Sat, 05 May 2012 14:35:46 -0400
If I have followed this correctly: As this is a single, PP amp fed with two independent exciters how do you maintain proper phasing which is critical? Even if the exciters are synchronized a tiny dif
/archives//html/Amps/2012-05/msg00209.html (18,344 bytes)

72. Re: [Amps] [ham_amplifiers] RE: The power of an oversized electrolytic capacitor /howmuch PS filter C is enough? (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 11 May 2012 02:46:55 -0400
I think we are running into semantics, but the way I see it(depending on how active feedback is defined) if the math is done for either the flywheel or the caps they do see what I would call an activ
/archives//html/Amps/2012-05/msg00266.html (32,369 bytes)

73. Re: [Amps] Output choke - Calculation (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 17 May 2012 04:25:55 -0400
It just needs to be a very high resistance at any operating frequency, bleed static to ground, and hopefully trip the PS out if the plate blocking cap goes. The general consensus is that the old 2.5
/archives//html/Amps/2012-05/msg00293.html (7,957 bytes)

74. Re: [Amps] Fw: Question for new amateur radio operators (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 25 May 2012 20:11:28 -0400
Hey! If Obama can still blame Bush, we can still blame you!<:-)) What were we talking about? 73 Roger (K8RI) _______________________________________________ Amps mailing list http
/archives//html/Amps/2012-05/msg00333.html (8,844 bytes)

75. Re: [Amps] Question for new amateur radio operators (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 25 May 2012 20:25:30 -0400
And be able to identify the last ones on that list above. Actually after all these years I figure I qualify to be able to purchase "plug and play"too, but as in computers it's usually "plug and pray"
/archives//html/Amps/2012-05/msg00334.html (8,017 bytes)

76. Re: [Amps] ANOTHER L4B EBAY (same seller) (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 08 Jun 2012 01:43:47 -0400
Who do you think winds those auctions? Does and L4B actually put our 1500 watts? Now if it were a heatkit, unassembeled, in the original box, it would be a true collectors piece. The Viking Ranger I
/archives//html/Amps/2012-06/msg00037.html (9,414 bytes)

77. Re: [Amps] Hunter 2000c (score: 1)
Author: "Roger (K8RI)" <>
Date: Sat, 09 Jun 2012 16:54:29 -0400
I remember when the adds first came out for the Hunter Bandit. IIRC that one came assembled, but from the kits to the final Bandit, I kept saying I want one of those. I don't remember if that was dur
/archives//html/Amps/2012-06/msg00050.html (7,497 bytes)

78. Re: [Amps] Alpha 76A 3 holer.... happy with just 2 tubes? (score: 1)
Author: "Roger (K8RI)" <>
Date: Tue, 12 Jun 2012 18:45:05 -0400
3CX300A7s (8874's) are still listed as being made by Eimac and RF parts lists them but they are very expensive. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@
/archives//html/Amps/2012-06/msg00078.html (8,190 bytes)

79. Re: [Amps] Dummy Load Blues (score: 1)
Author: "Roger (K8RI)" <>
Date: Thu, 14 Jun 2012 18:54:43 -0400
Most came with non hazardous oil although many hams did put PCB oil in them. Did it smell like oil or mineral oil? If so it was not PCBs. Go to an industrial paint supply or even your Ace Hardware st
/archives//html/Amps/2012-06/msg00114.html (9,530 bytes)

80. Re: [Amps] Babying radios conclusion (score: 1)
Author: "Roger (K8RI)" <>
Date: Fri, 15 Jun 2012 00:25:24 -0400
Not exactly. Only half sand...IE, sand is quartz SiO2, The solid state devices are generally made of either Silicon or Germanium although there is a layer of oxide in there. Solid state devices do ag
/archives//html/Amps/2012-06/msg00129.html (11,985 bytes)

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