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321. [Amps] Parts needed (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 31 Dec 2004 13:12:25 -0500
This might be a lil off topic but here goes. I bought an old signal generator made by Hickok for Zenith. It is similar to a Hickok 288X less one meter. I need the lens and bezel for the frequency sca
/archives//html/Amps/2004-12/msg00410.html (6,492 bytes)

322. Re: [Amps] ? Transformer (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 31 Dec 2004 19:26:25 -0500
Ron, Henry 2K Plate Transformer Steel Case Core: EI-19 X 3.5" 29GM6X E-I Laminated Core PR: 120/240 VAC 60 HZ 1PH SEC: 6000 VAC C.T. @ 1/2 ampere Will Matney Ron wrote: Hello to the Group, I have pur
/archives//html/Amps/2004-12/msg00419.html (7,364 bytes)

323. [Amps] Digital Hypot (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sat, 01 Jan 2005 16:18:49 -0500
A while back a few on here wanted me to post any hypot testers I ran across for sale. Ebay has this one with 1 day to go starting at $1.99. The is a digital type by Associated Research called a Hypot
/archives//html/Amps/2005-01/msg00004.html (6,665 bytes)

324. Re: [Amps] Parasites, Microbes and Other Biological Hazards (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sun, 02 Jan 2005 12:57:09 -0500
Wait till those microbes mutate and make the operator sick every time they tip the power switch. Folks takin too many antibiotics I'll tell ya. Will donii@sympatico.ca wrote: out? Apparently running
/archives//html/Amps/2005-01/msg00018.html (7,679 bytes)

325. Re: [Amps] mica padder capacitors. (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sun, 02 Jan 2005 12:59:51 -0500
Henry, Surplus Sales of Nebraska may have these but they are expensive. Sometimes you can find these on eBay at a decent price. If you dont find any, you may have to convert to doorknob type capacito
/archives//html/Amps/2005-01/msg00020.html (8,210 bytes)

326. Re: [Amps] ok ONE more time <g> Ameritron 811H (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sun, 02 Jan 2005 21:21:35 -0500
Dan, There grid resistors are there to actually work as a fuse which will open if an internal arc in the tube occurs (anode to grid). Most likely the resistor had failed some time back and was probab
/archives//html/Amps/2005-01/msg00030.html (10,332 bytes)

327. [Amps] Scope (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Thu, 06 Jan 2005 01:51:38 -0500
I know this is a bit off topic but I had to show this. This is a 1960 model HP scope, 15 MHz. I always thought that things "depreciated" over time, you'll see. Scope: http://cgi.ebay.com/ws/eBayISAPI
/archives//html/Amps/2005-01/msg00066.html (6,394 bytes)

328. [Amps] PLATE RESISTENCE (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Thu, 06 Jan 2005 12:40:02 -0500
Chris, The Q is of the tank circuit and is added in the formula after you find the plate impedance. You are correct that the impedance will be 1/2 of one tube. A Q of 10-12 is used for the proper act
/archives//html/Amps/2005-01/msg00076.html (7,366 bytes)

329. [Amps] PLATE RESISTENCE (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Thu, 06 Jan 2005 15:26:28 -0500
Perzactly! This is a good reason to note why tube amps using pi and pi-l networks are superior to broad band solid state amplifiers. The harmonic rejection of the networks are much greater assuring a
/archives//html/Amps/2005-01/msg00084.html (7,683 bytes)

330. [Amps] 12.6v fils transformer source ? (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 07 Jan 2005 02:36:33 -0500
Ian, 12.6 Vac at how many amperes? You may be able to buy two transformers with 115 Vac primaries and 12.6 Vac secondaries. Run the primaries in series for the 230 Vac and the secondaries in parallel
/archives//html/Amps/2005-01/msg00093.html (6,764 bytes)

331. [Amps] Re: plate resistance (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 07 Jan 2005 12:49:36 -0500
Roy, The Q meter I have here, really it's operations book, describes how you can mathmatically compare the measured Q to the Q used in figuring pi and pi-l circuits (operating Q). No it doesn't and w
/archives//html/Amps/2005-01/msg00099.html (7,860 bytes)

332. [Amps] Solid state amps (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 07 Jan 2005 12:55:38 -0500
Steve, Motorola did publish one which was high power in the Motorola RF device handbook. The thing had several push-pull modules made around a rectangular looking heatsink with these modules mounted
/archives//html/Amps/2005-01/msg00100.html (6,937 bytes)

333. [Amps] Q meter [TSPA] (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 07 Jan 2005 17:47:56 -0500
John, In my opinion, I dont think any instrument can measure the true unloaded Q exactly due to too many factors or variables such as stray capacitance and inductance. They might show something in th
/archives//html/Amps/2005-01/msg00109.html (8,236 bytes)

334. [Amps] one more time - Ameritron fuse question (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 07 Jan 2005 23:43:03 -0500
Dan, Slow blow would be best in my opinion using 8 ampere fuses which in my opinion is still a little to small. I dont think running 10 or 12 ampere ones would hurt. When a short occurs, there's a hu
/archives//html/Amps/2005-01/msg00117.html (8,833 bytes)

335. [Amps] one more time - Ameritron fuse question - correction (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Fri, 07 Jan 2005 23:54:17 -0500
Dan, I need to re-state this. I forgot you mentioning running 240 Vac at 8 amperes or 120 vac with 12 amperes. 120 vac would give a max of 1,440 watts input at 12 amperes being drawn. That would be s
/archives//html/Amps/2005-01/msg00118.html (9,250 bytes)

336. [Amps] Q meter [TSPA] (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sat, 08 Jan 2005 19:43:37 -0500
Peter, Genrad (General Radio now named Quadtech) still does or they are included in their LCR meters. I have a digi-bridge here I use by them. ESI (Electro Scientific Industries), and Wayne-Kerr manu
/archives//html/Amps/2005-01/msg00131.html (8,862 bytes)

337. [Amps] Pi Network (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sat, 08 Jan 2005 19:50:38 -0500
Chris, I hate to say this, so don't take me wrong, but I found some inaacuracies with that software. After a certain size in L, the app will not hold the Q that you input for some reason. It's best t
/archives//html/Amps/2005-01/msg00132.html (8,460 bytes)

338. [Amps] Ferrite-loaded plate choke (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sun, 09 Jan 2005 13:39:48 -0500
Hi, I am currently building my first HF amp using a couple of 4cx 250b. I have found in the literature that the plate choke is quite a critical component and I found a few kinds of plate chokes desig
/archives//html/Amps/2005-01/msg00152.html (12,836 bytes)

339. [Amps] ? Plate Choke (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sun, 09 Jan 2005 21:40:14 -0500
Ron, Do you wish to make one or purchase one? There is several of us who make them but they are easy to fabricate on ones own to be honest about it. You can e-mail me if you wish about a purchase at
/archives//html/Amps/2005-01/msg00164.html (6,572 bytes)

340. [Amps] Q meter [TSPA] (score: 1)
Author: Will Matney <craxd1@ezwv.com>
Date: Sun, 09 Jan 2005 23:34:33 -0500
I found this on eBay if anyone is interested in a Q meter. This one is a Boonton 170-A with a range of 3 to 200 MHz. I think you'll notice a misprint on this on the page it's on. Anyhow, I think some
/archives//html/Amps/2005-01/msg00166.html (6,447 bytes)

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