Search String: Display: Description: Sort:

Results:

References: [ +from:sub1@rogerhalstead.com: 1109 ]

Total 1109 documents matching your query.

221. Re: [Amps] pole transformer (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Tue, 03 Feb 2009 00:21:51 -0500
Speaking as my own opinion: As long as the oil stays in the can there is no danger. If you get some on you, wash it off...thoroughly. It can be absorbed through the skin and it can allow other chemic
/archives//html/Amps/2009-02/msg00047.html (10,022 bytes)

222. Re: [Amps] pole transformer (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Tue, 03 Feb 2009 01:27:46 -0500
IIRC and it was a long time ago, the conclusion was based on the amount of material swabbed onto test rats. Roger (K8RI) _______________________________________________ Amps mailing list Amps@contest
/archives//html/Amps/2009-02/msg00048.html (9,190 bytes)

223. Re: [Amps] power and db (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Wed, 04 Feb 2009 16:48:47 -0500
In Theory :-)) 1 db is that change in audio which under ideal conditions can just be detected by the human ear. When working AU on 6-meters, hams routinely work CW that is "in the noise" to the point
/archives//html/Amps/2009-02/msg00092.html (10,918 bytes)

224. [Amps] Many Unusual sources of HV and some amp parts are out there. (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 05 Feb 2009 20:17:04 -0500
I worked in the semiconductor industry for over 26 years. We used RF generators that ranged from 6 or 8 KW out into widely varying impedances to some that were well into the hundreds of KW output.We
/archives//html/Amps/2009-02/msg00137.html (11,555 bytes)

225. Re: [Amps] Many Unusual sources of HV and some amp parts are out there. (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 05 Feb 2009 20:25:54 -0500
Oops, I didn't get my sig on the original post. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-02/msg00138.html (12,903 bytes)

226. Re: [Amps] SB-220's, 3-500's, some history (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Fri, 06 Feb 2009 17:21:19 -0500
That (If it's the guy up here in Mi) was a case of a 90 some year old veteran who froze when the city turned off his power due to over $1000 in unpaid utilities. The Governor now says, no more winter
/archives//html/Amps/2009-02/msg00159.html (9,852 bytes)

227. Re: [Amps] SB-220's, 3-500's, some history (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sat, 07 Feb 2009 18:43:15 -0500
When they made Paypal mandatory on most items AND changed the feedback system I pretty much quit using Ebay. The only things left on there are businesses where I can use my own CC. To me they have pr
/archives//html/Amps/2009-02/msg00182.html (10,115 bytes)

228. Re: [Amps] New Ameritron Solid State Amp? (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sun, 08 Feb 2009 00:03:07 -0500
But does it also cover 6-meters? Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-02/msg00190.html (8,625 bytes)

229. Re: [Amps] New Ameritron Solid State Amp? (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sun, 08 Feb 2009 02:27:54 -0500
With that size print not much of anything is clear even on my wide screen display. Too bad they didn't make it a PDF that would upscale. Near as I can make out it doesn't cover 6, and lacks the styli
/archives//html/Amps/2009-02/msg00194.html (10,886 bytes)

230. Re: [Amps] Ten Tec Titan II Blower Replacement? (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 09 Feb 2009 03:55:36 -0500
I take some motors into the local Ace Hardware store and they often have something that fits and with the same ratings. Also as mentioned above, try out the motor repair places around your area. Most
/archives//html/Amps/2009-02/msg00220.html (9,833 bytes)

231. Re: [Amps] 50 watt zeners (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Tue, 10 Feb 2009 14:13:24 -0500
Although they don't allow much flexibility in the installation, for large Zeners the stud mount is appropriate and efficient for the designed use. The big ones were bolted down to heat sinks which ma
/archives//html/Amps/2009-02/msg00275.html (8,782 bytes)

232. Re: [Amps] Transformer heating (problem?) (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 12 Feb 2009 01:38:58 -0500
My question would be: has the transformer ever been fully disassembled? To me the original problem would have indicated this might be a strong possibility. I'm assuming this is the standard "E" frame
/archives//html/Amps/2009-02/msg00353.html (10,728 bytes)

233. Re: [Amps] Amp Design Question... (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sat, 14 Feb 2009 02:21:29 -0500
I'd love to see some photos of the physical layout of that amp. To me that represents a feed through or chassis connector. I used to work on some German industrial RF equipment that used that symbol
/archives//html/Amps/2009-02/msg00441.html (9,128 bytes)

234. Re: [Amps] SB-220 Kit link. 2nd try (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sat, 14 Feb 2009 16:27:53 -0500
Experience counts! but not with collectors items..er radios. 73 Roger (K8RI) -- Original Message -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
/archives//html/Amps/2009-02/msg00455.html (10,364 bytes)

235. Re: [Amps] SB-220 Kit link. 2nd try (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sat, 14 Feb 2009 16:31:31 -0500
If purchased as a collector, then NO I'd not build it. I've always found it sad that the ARRL built the Ranger kit they discovered. Had they sold it they would have brought in a tidy sum. Not from th
/archives//html/Amps/2009-02/msg00456.html (7,346 bytes)

236. [Amps] OT Digest Posts (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Tue, 17 Feb 2009 20:23:22 -0500
This is just an FYI for the newcomers. Please don't respond to it on the reflector. I can understand some find the digest method of reading posts handy, but *please* do not post the digest when answe
/archives//html/Amps/2009-02/msg00541.html (6,825 bytes)

237. Re: [Amps] Remote power supply question (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Wed, 18 Feb 2009 16:22:42 -0500
I believe one of the necessities, it if the HV line becomes disconnected the PS shuts down. Actually I'd want the HV to be "crowbarred" to ground as soon as the connection is broken. 73 Roger (K8RI)
/archives//html/Amps/2009-02/msg00553.html (9,445 bytes)

238. Re: [Amps] Any Henry experts on the list? REPOST (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 19 Feb 2009 14:41:42 -0500
IF you want a tube amp with the agility of SS there is really only the Alpha "auto tune" The amps with roller inductors do have a bit of a learning curve when it comes to changing frequency and bands
/archives//html/Amps/2009-02/msg00572.html (9,004 bytes)

239. Re: [Amps] "Big Iron" transformer source in UK? (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sun, 01 Mar 2009 06:05:09 -0500
Well, just doing some fast math, running 1500 out on CW or better yet, digital where the duty cycle approaches 100% for a few minutes with 60% efficency GG the the transformer needs to be capable of
/archives//html/Amps/2009-03/msg00006.html (12,927 bytes)

240. Re: [Amps] Low Power (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 02 Mar 2009 04:22:44 -0500
It's been quite a while since I was involved at that level, but I think that would be dependent on the particular transistor(s) and the circuit. The curves for the 2SC5125 transistor listed as the tw
/archives//html/Amps/2009-03/msg00042.html (9,882 bytes)

Current List: 221 - 240
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
This search system is powered by Namazu