- 161. [Amps] current handling capacity of SM caps (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 8 Feb 2011 12:59:04 -0600
- Any idea of what the current handling capacity would be of the generic silver mica 500V cap? Due to the intervention of Murphy, I may be pressed into using a few of these paralleled in a L/C match fo
- /archives//html/Amps/2011-02/msg00051.html (7,441 bytes)
- 162. Re: [Amps] Alpha vs Henry (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Wed, 6 Apr 2011 20:33:07 -0500
- RTTY contest duty is the worst for the transformer - not for the tube. The thermal mass of the transformer is huge and if it starts out with a low temp the gradient will keep the innermost windings f
- /archives//html/Amps/2011-04/msg00267.html (13,773 bytes)
- 163. Re: [Amps] Alpha vs Henry (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Wed, 6 Apr 2011 20:55:00 -0500
- Sorry Damon to confuse. The exhaust temp is only good for determining how long it takes the tube/exhaust to get up to a steady temp. The actual temp around the tube cannot be easily deduced from this
- /archives//html/Amps/2011-04/msg00269.html (14,543 bytes)
- 164. Re: [Amps] Alpha vs Henry (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Thu, 7 Apr 2011 11:56:49 -0500
- Carl, You are right on the affected reading. On the couple of IR guns that I have, they seem to be affected by some frequencies more than others. So I try to check it while the rf is rocking by picki
- /archives//html/Amps/2011-04/msg00286.html (16,199 bytes)
- 165. Re: [Amps] Alpha vs Henry (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Fri, 8 Apr 2011 19:52:25 -0500
- I think the generic IR thermometer/gun is going to respond to the warmest temp item in the lens field because that's going to be the black body generating the most heat. And that warmest source is go
- /archives//html/Amps/2011-04/msg00308.html (10,574 bytes)
- 166. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 12 Apr 2011 22:09:49 -0500
- GI7B? 73, Jeff ACØC www.ac0c.com Needs the room for the HV transformer and screen supply? The GU84B is a Tetrode while the Swan is designed around a pair of Triodes. It Is relatively expensive tube e
- /archives//html/Amps/2011-04/msg00345.html (13,742 bytes)
- 167. Re: [Amps] Which hearhkit amp would you choose? (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 12 Apr 2011 22:51:59 -0500
- If digital modes are a factor, skip the SB200. 73, Jeff ACØC www.ac0c.com SB-200 or SB-220. The tube in the SB-230 is no longer made (8873). 73 Jim W7RY ______________________________________________
- /archives//html/Amps/2011-04/msg00348.html (8,709 bytes)
- 168. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 12 Apr 2011 22:59:39 -0500
- Yes, pair. But given 3500z is so easy to get, reliable and cheap, that seems the best way to go unless a guy is just dedicated to go ceramic. The GI46 is a bigger physical tube but it has the same Pd
- /archives//html/Amps/2011-04/msg00350.html (17,257 bytes)
- 169. Re: [Amps] Bag-o-meter calcs in US units (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Wed, 13 Apr 2011 17:16:00 -0500
- Now THAT is out of the bag thinking! Brilliant. 73, Jeff ACØC www.ac0c.com Not to run it into the ground, but does this look right? (in US units) . Construct a duct of heavy paper to match/mate the a
- /archives//html/Amps/2011-04/msg00384.html (8,472 bytes)
- 170. Re: [Amps] Bag-o-meter calcs in US units (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Wed, 13 Apr 2011 18:11:30 -0500
- Jim, A "rough idea" can get a guy a long way. Especially when the average Joe has "no idea." I think narrowing down the neck of the bag may or may not impact the stated volume. But even if you are 25
- /archives//html/Amps/2011-04/msg00388.html (9,687 bytes)
- 171. Re: [Amps] GI-46B it is!! (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Thu, 14 Apr 2011 23:38:00 -0500
- Bill, These tubes are all pulse rated. I think you will find much higher voltages listed under pulse duty. Of about 12 GI7B (similar structure as the 46b) I only found one which had a high-pot leakag
- /archives//html/Amps/2011-04/msg00438.html (8,427 bytes)
- 172. Re: [Amps] Roller Inductor Choices (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Fri, 15 Apr 2011 14:23:24 -0500
- Nice looking amp, Glen. 73, Jeff ACØC www.ac0c.com I recently built a 160-meter only amplifier using a pair of GI-7bT tubes. It was easy to make a socket for them starting with one of the $2.99 alumi
- /archives//html/Amps/2011-04/msg00448.html (9,425 bytes)
- 173. Re: [Amps] Roller Inductor Choices (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Fri, 15 Apr 2011 18:06:18 -0500
- Roger, Yes, you are right. As a practical matter, I ran a set of GI7b using the stock coolers in RTTY service for about 6 months before moving to some custom coolers which were optimized for lateral
- /archives//html/Amps/2011-04/msg00451.html (11,278 bytes)
- 174. Re: [Amps] PA efficiency (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Wed, 18 May 2011 00:33:06 -0500
- David, In the case of the GG, do you not need to deduct the drive power from the Po? Otherwise, the efficiency is overstated and the Pd is understated. I could be wrong? 73, Jeff ACØC www.ac0c.com 1)
- /archives//html/Amps/2011-05/msg00143.html (7,924 bytes)
- 175. Re: [Amps] Filament transformer needed (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 24 May 2011 23:03:34 -0500
- Glen, You may want to rethink that headroom. The transformer will tend to have a bit higher voltage if running at less than rated load. And higher than optimal fil voltages equate to shorter tube lif
- /archives//html/Amps/2011-05/msg00210.html (7,870 bytes)
- 176. Re: [Amps] lcd display (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 7 Jun 2011 15:57:48 -0500
- This may work for you... http://www.foxdelta.com/products/swr-hf.htm 73, Jeff ACØC www.ac0c.com i need one to mount inside the amplifier for a front panel bling toy. also the lp100 has no vhf coupler
- /archives//html/Amps/2011-06/msg00089.html (11,616 bytes)
- 177. Re: [Amps] lcd display (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 7 Jun 2011 18:18:54 -0500
- It looks to me that very simple and minor mods to the coupler would get it up to spec. If you keep the SWR under control, the voltages are not the issue. Only the currents. Laying a couple of symmetr
- /archives//html/Amps/2011-06/msg00094.html (13,881 bytes)
- 178. [Amps] Anyone recall this Dayton Hamvention surplus parts vendor name (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Mon, 11 Jul 2011 14:43:35 -0500
- There is a table at Dayton every year that I buy stuff from. And I want to buy more now but cant remember their blasted name. Their booth table is always inside and has maybe 3-4 folding tables in si
- /archives//html/Amps/2011-07/msg00115.html (7,780 bytes)
- 179. Re: [Amps] Anyone recall this Dayton Hamvention surplus partsvendor name (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Mon, 11 Jul 2011 15:31:43 -0500
- Don, That's the winner. Many thanks. 73, Jeff ACØC www.ac0c.com Mad Scientist Supply ? they always have a good stock of interesting "stuff" and good pricing. If you have the HamVention program you sh
- /archives//html/Amps/2011-07/msg00118.html (9,253 bytes)
- 180. Re: [Amps] Value? (PART TWO) (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Thu, 14 Jul 2011 14:17:11 -0500
- Allen, You are not dealing with a commodity. These things are sold in low enough volume and with a lot of variables beyond what is listed. So the selling price in any one instance is going to depend
- /archives//html/Amps/2011-07/msg00160.html (11,408 bytes)
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