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Total 421 documents matching your query.

201. Re: [Amps] mobile amp (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Tue, 8 Mar 2005 09:57:37 -0500
Dear Mark, Sorry to report of no Steely Dan disks, but I came up with a Donald Fagan "The Nightfly," on LP. Cuts include: I.G.Y., Green Flower Street, Ruby Baby, Maxine, New Frontier, The Nightfly, T
/archives//html/Amps/2005-03/msg00219.html (7,466 bytes)

202. [Amps] Shipping Damage Redux (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 9 Mar 2005 20:14:26 -0500
So Craters and Freighters drop off the 150 pound crate containing the Alpha 77 antenna tuner. The guy who's sending the unit tells me he will remove all the spinner knobs and stow them inside the uni
/archives//html/Amps/2005-03/msg00249.html (7,555 bytes)

203. Re: [Amps] FW: RE: Liquid Cooling Systems (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 13 Mar 2005 22:46:29 -0500
Dear Paul, Here in Kentucky we have all sorts of hillbilly drug labs opening up and being discovered. Just last week they found a meth lab hidden in a golf bag. It seems these people are stealing flu
/archives//html/Amps/2005-03/msg00317.html (8,934 bytes)

204. [Amps] Basic Electronics (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 13 Mar 2005 23:29:47 -0500
Dear Dan, The difficulty with a syllabus called "Basic Electronics," is firstly a starting point decision. When i was twelve I toojk a basic electronics course that started with basic electricity and
/archives//html/Amps/2005-03/msg00318.html (7,753 bytes)

205. Re: [Amps] 'Raytheon' milspec knobs additional (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 13 Mar 2005 22:12:44 -0500
Dear John, Thanks for the great contact. I brought up the website and there were my knobs, bigger than life. On Friday morning I called State and spoke with Dave. He looked up the part number and sai
/archives//html/Amps/2005-03/msg00319.html (7,635 bytes)

206. [Amps] Base Up or Down (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 16 Mar 2005 15:41:02 -0500
What is the significance of Base-Up or Base-Down, versus Operate in Any Position? Is it a gravity issue? Is it because heat rises? Does heat rise because of gravity? What do the astronauts in the ISS
/archives//html/Amps/2005-03/msg00382.html (6,326 bytes)

207. Re: [Amps] SB-200 blows fuses (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 19 Mar 2005 07:22:22 -0500
Dear Jeff, Pull the tubes and start the amp. Make sure the HV leads are isolated! Start only the filament department without the HV going. Vice versa, start the HV without the filament going.' It mig
/archives//html/Amps/2005-03/msg00412.html (7,363 bytes)

208. [Amps] Parasitic suppression kits (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 19 Mar 2005 08:37:37 -0500
Dear Gene, I've been following Mr. Measures' research on parasitic suppression for several years and have modified the design of every amplifier I've built and rebuilt in order to incorporate Low-Q s
/archives//html/Amps/2005-03/msg00414.html (7,146 bytes)

209. [Amps] Measuring RF Power (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Mon, 21 Mar 2005 11:15:15 -0500
In the cellular telephone RF world measuring power has become a critical function because the difference of 1 decibel can affect the operation of a 'cell site with three sectors, eight channels per r
/archives//html/Amps/2005-03/msg00452.html (9,520 bytes)

210. Re: [Amps] Measuring RF Power (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Mon, 21 Mar 2005 16:15:10 -0500
Dear Gary, You're acquainted with 3-phase electricity, yes? Imagine looking down the edge of the wire and seeing waveforms, infinitely thin, popping out at 0, 120 and 270 degrees. Kind of vector-ish,
/archives//html/Amps/2005-03/msg00471.html (8,509 bytes)

211. Re: [Amps] WTB: Bird Element 2500C (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 27 Mar 2005 19:30:13 -0500
Dear Jeff, Sorry to not be able to help with a 2500C, but happen to have a spare 5C and a spare 5D that I'll never use.... Hal \W4HBM _______________________________________________ Amps mailing list
/archives//html/Amps/2005-03/msg00617.html (7,144 bytes)

212. Re: [Amps] meter shielding (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 27 Mar 2005 19:03:42 -0500
Dear Chris, Some methods I employ in construction of amplifier metering involve the use of ceramic disk bypass capacitors at both ends of all control leads, everywhere. Another method is to use a sma
/archives//html/Amps/2005-03/msg00618.html (8,108 bytes)

213. Re: [Amps] Learning about Amps (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 30 Mar 2005 17:17:22 -0500
Dear Dan, A really FB read on tube amplifiers are ARRL Handbooks from the 'Fifties and 'Sixties. When I ponder on how I'm going to screw up the next project I find myself perusing the pages of my old
/archives//html/Amps/2005-03/msg00733.html (6,660 bytes)

214. [Amps] REL (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 13 Apr 2005 13:42:07 -0400
If your commercial business is fortunate to have the cash flow whereby regular purchases are made from REL, your business will find itself on an advantageous pricing tier. REL has a ten-tier pricing
/archives//html/Amps/2005-04/msg00259.html (7,875 bytes)

215. Re: [Amps] B&W plate choke (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 13 Apr 2005 13:51:52 -0400
A 200uH choke (for 1.8MHz RFC applications), using 26AWG magnet wire will require 445 turns with close spacing and this will occupy 14.1 inches of form at an inner diameter of 0.750 inches. _________
/archives//html/Amps/2005-04/msg00260.html (7,792 bytes)

216. [Amps] plate choke (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 13 Apr 2005 18:08:08 -0400
Dear Francis, Here are some basic choices for coils. The highlighted 24AWG coil on a 1.25" form seems the most exciting choice. However, the 28AWG will carry 640 mils, possibly, but I like to give it
/archives//html/Amps/2005-04/msg00268.html (7,554 bytes)

217. Re: [Amps] Tentec Centurion - meter calibration (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 16 Apr 2005 20:59:01 -0400
Hey Hank, Maybe your meters are calibrated for RMS. (All seriousness aside, it sounds like you need to invest, rent or borrow a calibrated set of meters so you can decide which is right. Then again,
/archives//html/Amps/2005-04/msg00316.html (7,004 bytes)

218. Re: [Amps] (amps)Shorting Sticks (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 24 Apr 2005 17:40:41 -0400
If you gentlemen remember a few months back, when a-building the 4,200 volt, 3-ampere CCS Anode Supply, how one bleeder resistor became defective, changed from 100K-ohms to 52 ohms, and how another b
/archives//html/Amps/2005-04/msg00498.html (7,199 bytes)

219. [Amps] Commander Amplifiers (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 30 Apr 2005 12:04:49 -0400
The manufacturer reports that the Magnum series will have a physically smaller plate transformer than the 3-tube HF-2500E (export) model. The Magnum series will run a higher plate voltage than the HF
/archives//html/Amps/2005-04/msg00634.html (6,872 bytes)

220. [Amps] E-Bay Education (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 4 May 2005 15:12:50 -0400
There's a ton of stuff around the house and sheds that's not doing me any good, so I figured an E-Bay store with a low-pressure environment where Best Offers are invited, and the cost is low, and it
/archives//html/Amps/2005-05/msg00065.html (7,536 bytes)

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