- 241. Re: [Amps] UHF Connectors (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Tue, 12 Nov 2013 01:59:10 -0500
- The name dates from the '30s or early '40s. No question that there's a small discontinuity due to the Zo of the connector, but it certainly doesn't matter below 50 MHz, and at higher frequencies is
- /archives//html/Amps/2013-11/msg00253.html (12,819 bytes)
- 242. Re: [Amps] UHF Connectors (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Wed, 13 Nov 2013 02:39:34 -0500
- That's Phenolic. Hasn't been used in decades AFAIK. BTW when you see a white insulator in connectors, it is often High Density Polyethylene and not Teflon. It has very poor thermal characteristics an
- /archives//html/Amps/2013-11/msg00267.html (9,236 bytes)
- 243. Re: [Amps] UHF Connectors (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Wed, 13 Nov 2013 02:42:34 -0500
- We know that the original PL259 is an excellent connector if it is assembled properly, but the original design allows so many different ways of doing it badly - so much so that badly assembled PL259
- /archives//html/Amps/2013-11/msg00268.html (11,624 bytes)
- 244. Re: [Amps] UHF Connectors (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Wed, 13 Nov 2013 08:42:55 -0500
- On 11/13/2013 7:29 AM, Paul Christensen wrote: I've given up on the traditional solder-type PL-259s. Now I use the crimp on type and have never had a failure. The crimper is expensive but well worth
- /archives//html/Amps/2013-11/msg00275.html (14,815 bytes)
- 245. Re: [Amps] UHF Connectors & Crimpers: WHICH/WHAT SOURCE (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Wed, 13 Nov 2013 14:53:14 -0500
- Could I please get some recommendations for SOURCE of CRIMPER and its brand. Also UHF crimp-PL259s. I purchase connectors through thr RFC, and Davis. I order over the phone and tell them what I want.
- /archives//html/Amps/2013-11/msg00290.html (10,579 bytes)
- 246. Re: [Amps] UHF Connectors & Crimpers: WHICH/WHAT SOURCE (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Thu, 14 Nov 2013 01:58:06 -0500
- I use a 300 watt soldering gun, silver solder with real flux, and actually solder the shield as well as the center pin. No crimpers, no dies, no worry about sizes. REPLY: Something one might want to
- /archives//html/Amps/2013-11/msg00317.html (11,688 bytes)
- 247. Re: [Amps] UHF Connectors & Crimpers: WHICH/WHAT SOURCE (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Thu, 14 Nov 2013 02:05:49 -0500
- I do not know of any such list. I would call the manufacturer of your dies and ask them about the ones you have. There must be some kind of numbers associated with them. Good luck. 73 Pete N4KW There
- /archives//html/Amps/2013-11/msg00318.html (11,023 bytes)
- 248. Re: [Amps] Chinese 4CX1000A from Alpha (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Sat, 16 Nov 2013 04:01:42 -0500
- On 11/15/2013 7:27 PM, Vic K2VCO wrote: According to the data sheets, they are very different. The 1500B has a special grid structure that produces a very low level of IMD, if you operate them accord
- /archives//html/Amps/2013-11/msg00351.html (8,222 bytes)
- 249. Re: [Amps] Chinese 4CX1000A from Alpha (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Sat, 16 Nov 2013 22:29:38 -0500
- On 11/16/2013 11:15 AM, Vic, K2VCO wrote: I didn't intend to criticize Alpha. Alpha said they were "interchangeable in these amplifiers" which is reasonable if they are running lower screen voltage.
- /archives//html/Amps/2013-11/msg00355.html (11,368 bytes)
- 250. Re: [Amps] Crimp connector die sizes (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Sun, 24 Nov 2013 20:34:52 -0500
- 9913 is an RG8 size cable. 0.429, not 0.118 All the LMR-600 tools I've seen are single purpose. Mine in a lever action that slides the one side of the die horizontally which is part of the tool 73 R
- /archives//html/Amps/2013-11/msg00416.html (9,041 bytes)
- 251. Re: [Amps] Arctic Silver (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Thu, 12 Dec 2013 02:26:20 -0500
- On 12/12/2013 12:12 AM, David Lisney wrote: Hi, I have used Arctic Silver in the normal computer CPU application (a twin cpu computer with homebrew watercoolers etc) it did produce a lower thermal re
- /archives//html/Amps/2013-12/msg00092.html (29,341 bytes)
- 252. Re: [Amps] Arctic Silver (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Sat, 14 Dec 2013 20:22:31 -0500
- I had one of those at work (bout 18" X 18" or so), back in the old technician days and they are heavy. Wish I had one now. You know surfaces are flat when you put two together dry and they stick! 73
- /archives//html/Amps/2013-12/msg00112.html (10,138 bytes)
- 253. Re: [Amps] "N" Connector (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Thu, 19 Dec 2013 16:47:46 -0500
- On 12/15/2013 12:19 PM, Col. Paul E. Cater wrote: A few weeks ago, there was an excellent thread concerning connectors on one of the forums. I didn't see it mentioned so I was wondering if anyone has
- /archives//html/Amps/2013-12/msg00142.html (8,876 bytes)
- 254. Re: [Amps] Tokyo High Power is no more... (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Fri, 27 Dec 2013 22:38:49 -0500
- what a shame. They msde some nice amps too. 73 Roger (K8RI) -- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com _______________________
- /archives//html/Amps/2013-12/msg00153.html (7,083 bytes)
- 255. Re: [Amps] "N" Connector (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Mon, 30 Dec 2013 01:49:21 -0500
- Not sure where my answer went so I'll try again. Depending on the coax type/size, put a one or two turn loop at each end. Strain reliefs will not prevent the center conductor migration where a loop w
- /archives//html/Amps/2013-12/msg00176.html (10,508 bytes)
- 256. Re: [Amps] "N" Connector (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Mon, 30 Dec 2013 12:25:00 -0500
- On 12/30/2013 2:56 AM, Jim Thomson wrote: Date: Sun, 29 Dec 2013 16:13:06 -0700 From: "Jim Garland" <4cx250b@miamioh.edu> To: "'Ian White'" <gm3sek@ifwtech.co.uk>, <jtml@vla.com>, <amps@contesting.co
- /archives//html/Amps/2013-12/msg00187.html (11,796 bytes)
- 257. Re: [Amps] Fake and Counterfeit Chinese Transistors 2SC3133 (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Tue, 31 Dec 2013 14:58:00 -0500
- Lesson learned here: avoid anything "Made In China" if at humanly possible anymore... Years ago, we went through the same thing with parts and devices from Japan and likewise it was the cottage indus
- /archives//html/Amps/2013-12/msg00242.html (11,240 bytes)
- 258. Re: [Amps] Building an Amp 101 (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Fri, 17 Jan 2014 16:49:44 -0500
- On 1/17/2014 10:10 AM, Jerry wrote: I have had a long desire to build my own linear HF or VHF amp. I believe I have the electronic technical skills but after looking at some completed projects like t
- /archives//html/Amps/2014-01/msg00114.html (13,798 bytes)
- 259. Re: [Amps] Building an Amp 101 (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Fri, 17 Jan 2014 18:47:33 -0500
- On 1/17/2014 5:10 PM, Colin Lamb wrote: One area where home built amplifiers can be substantially better than commercial ones is ease of repair. Many commercial amps are designed to be compact. Even
- /archives//html/Amps/2014-01/msg00116.html (11,169 bytes)
- 260. Re: [Amps] Building an Amp 101 (score: 1)
- Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
- Date: Sat, 18 Jan 2014 15:16:50 -0500
- Jerry, It often seems at though the only builders here are those who turn out works of art. I've seen many well engineered and laid out amps on here, but being a perfectionist, Ive seen none that I'd
- /archives//html/Amps/2014-01/msg00141.html (18,604 bytes)
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