Search String: Display: Description: Sort:

Results:

References: [ +from:wc6w_amps@yahoo.com: 193 ]

Total 193 documents matching your query.

161. Re: [Amps] Using switch mode power supply for heater power (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Tue, 28 Jun 2011 09:54:58 -0700 (PDT)
Hi David, Been there, done that. http://qsl.net/wc6w/wc6wamps/index.html?fr63.html Though the amp didn't end up small nor lite! http://web.archive.org/web/20010825210138/http://www.angenent.org/W7IUV
/archives//html/Amps/2011-06/msg00307.html (10,458 bytes)

162. Re: [Amps] PA choke design (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Tue, 28 Jun 2011 10:04:15 -0700 (PDT)
Hi Carel, Some antique possibities: Miller 4534 or 4535 Bud CH-568 Johnson 102-754 Though, if you're sourcing from E-Pay, beware that those folks don't always go by the names & numbers nor use them c
/archives//html/Amps/2011-06/msg00308.html (8,763 bytes)

163. Re: [Amps] PA choke design (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 29 Jun 2011 11:42:00 -0700 (PDT)
Hi Don, A similar result can be acheived with the plate feed run through the Pi (or Pi-L) coil(s). See: http://qsl.net/wc6w/wc6wamps/index.html?fr62.html A smallish (100uH for 160M) choke may then be
/archives//html/Amps/2011-06/msg00326.html (8,965 bytes)

164. Re: [Amps] Filament Suppy, Info for G8WRB (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 3 Jul 2011 12:17:00 -0700 (PDT)
Hi David, I've tweaked two commercial 5 volt SPS's up to 6 volts in this application. The only caveat is that the crowbar point needs to be run up in concert. I'd surmise that an old (1990's vintage)
/archives//html/Amps/2011-07/msg00016.html (9,140 bytes)

165. Re: [Amps] 4cx5000J for $75 NOS (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 24 Jul 2011 12:24:43 -0700 (PDT)
That is NOT a 4CX5000J. The 8909 is a date code. More E-stupidity. 73 & Good afternoon, Marv WC6W http://qsl.net/wc6w/ -- On Sun, 7/24/11, Fuqua, Bill L <wlfuqu00@uky.edu> wrote: ____________________
/archives//html/Amps/2011-07/msg00288.html (8,886 bytes)

166. [Amps] FS: Parts that may be of some use in Amplifiers (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sat, 30 Jul 2011 12:00:05 -0700 (PDT)
** Tube Sockets & Accessories ** Coaxial Planar Tube -- shielded heater/cathode contact assembly. Fits 2C39, 3CX100A5 or similar. Silver plated, NOS -- $10 each Johnson 122-101 ceramic 7 pin septar s
/archives//html/Amps/2011-07/msg00301.html (13,214 bytes)

167. [Amps] Plate Cap Quandary (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 3 Aug 2011 09:18:45 -0700 (PDT)
I'm contemplating a single 4CX350FJ (Cout = 7pF) amplifier for 250 watts on HF where the plate impedance, at 2200 volts, figures to be 5000 ohms and requires a (total) plate C circa 15pF on 10 meters
/archives//html/Amps/2011-08/msg00001.html (7,142 bytes)

168. Re: [Amps] bird meters (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Thu, 8 Sep 2011 09:15:55 -0700 (PDT)
Hi, Probably don't want to start messing with the slug calibraton. You could drive a current sink (op-amp + JFET + 420 ohm R) with a 1400 ohm input R to match the type 43 slug. Something like this: h
/archives//html/Amps/2011-09/msg00018.html (8,159 bytes)

169. Re: [Amps] Need spec for Jennins type U (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 14 Nov 2011 11:44:02 -0800 (PST)
Hi Bill, 10, 15 or 20 KV but, at this juncture, to paraphrase Clairol, "only your hi-pot testor knows for sure". 73 & Good afternoon, Marv WC6W http://qsl.net/wc6w/ __________________________________
/archives//html/Amps/2011-11/msg00068.html (8,684 bytes)

170. [Amps] FS: Amplifier Parts & Things (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Tue, 6 Dec 2011 18:28:03 -0800 (PST)
** Capacitors ** Cardwell -- XR-1000HS (about 950pF max measured) These have slightly contoured plates for improved tuning resolution at minimum C. .030 air gap. About 4.5" x 4" x 3.5" overall includ
/archives//html/Amps/2011-12/msg00056.html (12,032 bytes)

171. Re: [Amps] Shipment of large old tubes (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 21 Dec 2011 09:46:50 -0800 (PST)
Like this: http://www.youtube.com/watch?v=DhmjJCBQ-cA I had an old tube style monitor shipped to me about a decade ago and they'd handled it so rough that the CRT broke loose from the plastic case. I
/archives//html/Amps/2011-12/msg00178.html (8,616 bytes)

172. Re: [Amps] Warm up and on time question... (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Thu, 22 Dec 2011 10:15:55 -0800 (PST)
Hi Mike, It could be done in the "old way" with a phase control using a Triac. See Unitrode Application Note U-83 http://www.ti.com/lit/ml/slup061/slup061.pdf or perhaps an old GE SCR handbook. A mod
/archives//html/Amps/2011-12/msg00196.html (10,442 bytes)

173. Re: [Amps] 4CX5000/10000 Screen power supply help needed (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 4 Jan 2012 10:43:50 -0800 (PST)
Hi Hsu, You might make a series regulator with one of these FET's controlled by a LM317. A foldback limiter is mandatory. http://ixapps.ixys.com/DataSheet/DS100286(IXTH3N150).pdf or for a bit more he
/archives//html/Amps/2012-01/msg00041.html (9,957 bytes)

174. Re: [Amps] plate choke location (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Fri, 6 Jan 2012 11:18:27 -0800 (PST)
Hi Danny, You may find this page of interest: http://qsl.net/wc6w/wc6wamps/index.html?fr62.html 73 & Good morning, Marv WC6W 310 649 3111 _______________________________________________ Amps mailing
/archives//html/Amps/2012-01/msg00092.html (8,528 bytes)

175. Re: [Amps] GPT-750 power supply (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Thu, 9 Feb 2012 08:47:24 -0800 (PST)
Hi Steve, If you don't mind heating up the room ... You could use what I call a "smart bleeder". Take a big power FET (IXYS IXTX5N250 or similar), suitably heatsinked, and connect it in series with a
/archives//html/Amps/2012-02/msg00076.html (10,003 bytes)

176. [Amps] Filament Stabilizer (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 18 Jun 2012 08:38:00 -0700 (PDT)
See the bottom of this page: http://qsl.net/wc6w/wc6wamps/index.html?fr63.html The design was bench tested but, never used in an amplifier. I employ DC on all my projects as shown higher up on that p
/archives//html/Amps/2012-06/msg00239.html (7,094 bytes)

177. Re: [Amps] Neon xfmr for HiPot (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 16 Jul 2012 09:28:17 -0700 (PDT)
Hi Mike, Yep. http://qsl.net/wc6w/wc6wtest/index.html?fr50.html 73 & Good morning, Marv WC6W http://qsl.net/wc6w/ _______________________________________________ Amps mailing list Amps@contesting.com
/archives//html/Amps/2012-07/msg00206.html (8,650 bytes)

178. Re: [Amps] Blower recommendations 8877 amp. (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 8 Aug 2012 08:28:46 -0700 (PDT)
Hi Charles, http://www.comairrotron.com/content/spinnaker-spd24b1-032183 Note that the reference to AC on the web data sheet is in error. It is a DC blower. 73 & Good morning, Marv WC6W http://qsl.ne
/archives//html/Amps/2012-08/msg00126.html (9,784 bytes)

179. Re: [Amps] 4CX1500B project (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Thu, 9 Aug 2012 10:49:10 -0700 (PDT)
Hi Vic, Recognizing that this isn't an optimum tube for CW, one might consider exploring Class C operation since IMD is of no concern in CW. Start with perhaps -85 or -90 volts grid bias so that the
/archives//html/Amps/2012-08/msg00155.html (11,678 bytes)

180. Re: [Amps] non traditional linear (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 13 Aug 2012 09:47:03 -0700 (PDT)
Hi Paul, I've got dibs on friend's Apple G5, when it dies, for something similar. 73 & Good morning, Marv WC6W http://qsl.net/wc6w/ _______________________________________________ Amps mailing list A
/archives//html/Amps/2012-08/msg00187.html (8,327 bytes)

Current List: 161 - 180
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
This search system is powered by Namazu