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Total 1318 documents matching your query.

241. [AMPS] isolation question (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Wed, 17 Feb 1999 11:25:38 -0500
On Tue, 16 Feb 1999 12:10:15 -0700 "Richard W. Ehrhorn" <w4eto@rmii.com> writes: Nice and concise Dick, thanks for that info. I have, and sure others also, blown the Teflon sheet as used in many ham
/archives//html/Amps/1999-02/msg00448.html (11,035 bytes)

242. [AMPS] L-Net calculations: Am I doing something wrong? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Thu, 18 Feb 1999 01:46:09 -0500
More to the point, exactly what is the 10M input network, as I asked 2 weeks ago ? Have you ever measured any of the LC values? What is the material in the slug tuned coil? What is the wire size and
/archives//html/Amps/1999-02/msg00458.html (13,201 bytes)

243. [AMPS] L-Net calculations: Am I doing something wrong? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Thu, 18 Feb 1999 01:29:19 -0500
On Wed, 17 Feb 1999 14:43:06 -0800 Rich Measures <measures@vc.net> writes: Hoff recommends 1.57 for Class B and 1.3 for A . You can pick a number in between for AB2 and be close enough to end the dis
/archives//html/Amps/1999-02/msg00459.html (14,724 bytes)

244. [AMPS] isolation question (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Thu, 18 Feb 1999 02:15:40 -0500
On Wed, 17 Feb 1999 15:45:15 -0700 "Richard W. Ehrhorn" <w4eto@rmii.com> writes: OK Dick BUT that was why I asked the question. Unless you buy the top grade Teflon sheet there will be air voids...per
/archives//html/Amps/1999-02/msg00460.html (14,617 bytes)

245. [AMPS] SB220 Xformer labodomy (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Fri, 19 Feb 1999 23:22:13 -0500
On Thu, 18 Feb 1999 16:56:47 -0500 Len Schaier <lschaier@avotec.com> writes: It almost sounds like a replacement xfmr from a grade Z supplier, never experienced that problem in several hundred 220 se
/archives//html/Amps/1999-02/msg00517.html (10,026 bytes)

246. [AMPS] L-Net calculations: Am I doing something wrong? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Fri, 19 Feb 1999 21:15:08 -0500
There is life beyond the computer ! As many have mentioned, perhaps some of those formulas are questionable...there are enough of them to even confuse a bureaucrat. The fact that I calculate a Q in t
/archives//html/Amps/1999-02/msg00518.html (15,462 bytes)

247. [AMPS] What (modern) tube to use? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Fri, 19 Feb 1999 23:17:21 -0500
On Thu, 18 Feb 1999 15:54:11 -0500 "Joe Subich, W8IK/4" <W8IK@ibm.net> writes: For an indestructible amp at 1500W out and 100W drive do not overlook the 3CX3000A7 or the 3CPX5000A7/YC-156. Yes the fo
/archives//html/Amps/1999-02/msg00519.html (11,360 bytes)

248. [AMPS] L-Net calculations: Am I doing something wrong? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Fri, 19 Feb 1999 20:22:25 -0500
I'll reply eventually then also. Sorry for the few day delay in responding but trying to cram 13 hr days in M-TH and 9 hrs today in order to cover my trip to NC next week. My boss wanted that 40GHz P
/archives//html/Amps/1999-02/msg00520.html (12,284 bytes)

249. [AMPS] resistors (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 15:17:16 -0500
If you use the original style self centering end clamps and thru bolt you will have plenty of reserve voltage rating at 4KV so half that is very safe. Mount to a bakelite board or a ceramic stand-off
/archives//html/Amps/1999-02/msg00536.html (9,514 bytes)

250. [AMPS] Transceivers high 3rd order IMD (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 13:56:43 -0500
The AB1 spec at 2KV is 335ma per tube. In AB2 at 2.5KV it is 400ma. Must have had to in order to keep the The stock AB2 NCL-2000 ran -28dB. With the G3SEK screen regulator and biased closer to AB1 t
/archives//html/Amps/1999-02/msg00537.html (9,288 bytes)

251. [AMPS] Tube IMD/6146/4cx10000 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 13:05:30 -0500
On Thu, 18 Feb 1999 18:09:05 -0800 (PST) igor rosky <irosky@yahoo.com> writes: There are some interesting developments in SS IMD performance in the microwave wireless industry. Using circuitry to sen
/archives//html/Amps/1999-02/msg00538.html (10,238 bytes)

252. [AMPS] Tube IMD/6146/4cx10000 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 13:17:48 -0500
The TS-830 uses negative feedback Peter. The stock radio measures -35dB on SSB voice. Driver and PA tube condx is important also. The +10dBM signal out of the transverter port of the TS-830 measures
/archives//html/Amps/1999-02/msg00539.html (10,487 bytes)

253. [AMPS] What (modern) tube to use? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 12:58:36 -0500
On Fri, 19 Feb 1999 00:47:44 -0500 "David A. Pruett" <k8cc@ix.netcom.com> writes: Nice station Dave! When KQ2M used to flog my station in contests the run amp was a pair of 3-500's that took all the
/archives//html/Amps/1999-02/msg00540.html (14,358 bytes)

254. [AMPS] What (modern) tube to use? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 15:34:06 -0500
On Sat, 20 Feb 1999 00:10:02 -0500 "Joe Subich, W8IK/4" <W8IK@ibm.net> writes: Agreed, except to continue the never ending reflector hype on its use. Belongs more on the CB reflector IMO. 73 Carl KM1
/archives//html/Amps/1999-02/msg00541.html (10,172 bytes)

255. [AMPS] Filament Choke Question (RE: Handbook example) (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 15:53:10 -0500
The 8877 is indirectly heated as is the 8874, 3CX800, YC-156 and others. A small filament choke is advantageous in order to assure full isolation. Ameritron uses one as did Dentron which may account
/archives//html/Amps/1999-02/msg00542.html (9,817 bytes)

256. [AMPS] resistors (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 18:57:20 -0500
On Sat, 20 Feb 1999 05:43:15 -0800 Rich Measures <measures@vc.net> writes: Not if done by the mfgs book. 100k Details please. If I Absolute YUK ! 800K to 1M bleders..no way Jose. Get a freebie Mouser
/archives//html/Amps/1999-02/msg00546.html (10,820 bytes)

257. [AMPS] Maxwell paper caps - specs and polarity? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 18:47:16 -0500
On Sat, 20 Feb 1999 06:01:09 -0800 Rich Measures <measures@vc.net> writes: And that is often the maximum rating for ham service. The typical laser discharge cap is fine at half the voltage ratings wh
/archives//html/Amps/1999-02/msg00547.html (8,393 bytes)

258. [AMPS] Maxwell paper caps - specs and polarity? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 20 Feb 1999 19:03:17 -0500
What are the physical dimensions? Many similarly rated caps are a disaster in a real HV supply. ___________________________________________________________________ You don't need to buy Internet acce
/archives//html/Amps/1999-02/msg00548.html (9,171 bytes)

259. [AMPS] resistors (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sun, 21 Feb 1999 09:53:58 -0500
On Sat, 20 Feb 1999 22:47:52 -0800 Rich Measures <measures@vc.net> writes: Yes of course but if run at or below rated wattage it will survive. Which is why 100K is the suggested max in any literature
/archives//html/Amps/1999-02/msg00563.html (11,833 bytes)

260. [AMPS] Mirage Amp Modification (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sun, 21 Feb 1999 10:21:16 -0500
On Sat, 20 Feb 1999 20:56:30 -0500 "frank ayers jr" <LOMAX1@prodigy.net> writes: Fred, N1DPM, wrote an excellent active bias mod in the NE VHF/UHF proceedings a few years ago. Two cheap transistors a
/archives//html/Amps/1999-02/msg00564.html (8,171 bytes)

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