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361. [Amps] Labeling panels (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Wed, 18 Aug 2010 21:00:19 -0700
What's a good way to label an unpainted aluminum panel? It has a 'satin finish' thanks to an orbital sander, which really has covered a multitude of sins. I looked into custom engraved adhesive-backe
/archives//html/Amps/2010-08/msg00314.html (7,595 bytes)

362. Re: [Amps] Labeling panels (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Thu, 19 Aug 2010 09:42:20 -0700
Thanks to everyone who answered my question about labeling panels. I've decided to use laser-printer water-slide decals. This is reasonably cheap, and since I have a color laser printer, allows me to
/archives//html/Amps/2010-08/msg00322.html (7,722 bytes)

363. Re: [Amps] Labeling panels (score: 1)
Author: "Vic, K2VCO" <vic@rakefet.com>
Date: Thu, 19 Aug 2010 19:35:24 -0700
I haven't decided yet. The lettering could be done in any program. The interesting part will be the bandswitch decals. I'll be happy to share them once I figure out how to do it! -- Vic, K2VCO Fresno
/archives//html/Amps/2010-08/msg00331.html (7,956 bytes)

364. Re: [Amps] Labeling panels (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Fri, 20 Aug 2010 17:15:36 -0700
This program is great! I spent about an hour and have some very nice designs, including ones for the bandswitches. As soon as I get the decal paper, I'll be all set. -- Vic, K2VCO Fresno CA http://ww
/archives//html/Amps/2010-08/msg00342.html (8,710 bytes)

365. Re: [Amps] Labeling panels (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Sat, 21 Aug 2010 15:55:44 -0700
I thought of that and tried to figure out how, but I think it can't. However, you can probably use some kind of graphics program to invert it. In order to get a graphic file, though, I had to print o
/archives//html/Amps/2010-08/msg00348.html (10,612 bytes)

366. Re: [Amps] Can I cool too much the tubes or ants? (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 23 Aug 2010 22:37:34 -0700
The cubical quad antenna was invented by Clarence Moore, W9LZX, to solve the problem of corona discharge damaging antenna elements when high power is combined with high altitude. If you google HCJB y
/archives//html/Amps/2010-08/msg00358.html (9,860 bytes)

367. Re: [Amps] triode or tetrode (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Thu, 26 Aug 2010 08:30:54 -0700
I think that you meant 'triodes have better IMD performance'? Keep in mind, though, that many transceivers have much worse IMD than a decent amp, especially if the transceiver has a 12v final. I doub
/archives//html/Amps/2010-08/msg00388.html (7,993 bytes)

368. Re: [Amps] SHV connectors great, but where to find coax? (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 13 Sep 2010 09:59:46 -0700
I fully support the right of each individual to do what he wants unless it directly interferes with others' rights to do similarly. But I know my limitations and I know that no matter how well I unde
/archives//html/Amps/2010-09/msg00145.html (12,717 bytes)

369. Re: [Amps] construct ferrite "line isolator" (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Tue, 26 Oct 2010 08:41:54 -0700
Two common misconceptions about toroids and rfi: 1) 'Ferrite' and powdered iron are very different materials although lots of guys incorrectly just say 'ferrite'. The important thing for our purposes
/archives//html/Amps/2010-10/msg00376.html (9,270 bytes)

370. Re: [Amps] our amplifier in 2010 CQWW (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Tue, 09 Nov 2010 08:35:31 -0800
Personally, I /like/ it when some of these guys use QRO++. Let's face it, when they have an antenna system that cost more than my house (some of them do), I am not exactly competing with them, no mat
/archives//html/Amps/2010-11/msg00093.html (15,924 bytes)

371. Re: [Amps] Blower source (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Fri, 12 Nov 2010 20:41:21 -0800
I bought a well-constructed looking surplus one from All Electronics very cheaply. Unfortunately, it hums loudly. You get what you pay for. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _________
/archives//html/Amps/2010-11/msg00192.html (9,639 bytes)

372. [Amps] Attenuator needed (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 15 Nov 2010 12:38:14 -0800
I made a 6 db attenuator for the input of my grid-driven amplifier in order to bring the drive requirement up a bit and to provide a better SWR for the exciter during tuning. I used some film resisto
/archives//html/Amps/2010-11/msg00255.html (7,476 bytes)

373. Re: [Amps] Attenuator needed (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 15 Nov 2010 13:06:43 -0800
Thanks! I just ordered the 6 db version. Lots of interesting stuff there. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _______________________________________________ Amps mailing list Amps@cont
/archives//html/Amps/2010-11/msg00257.html (9,702 bytes)

374. Re: [Amps] Attenuator needed (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 15 Nov 2010 13:30:20 -0800
I see what you did -- simple idea. I used some flat resistors that bolt to a heatsink, each one rated at 20 watts. I don't recall, but I think they are called 'thick film' resistors. Not the same as
/archives//html/Amps/2010-11/msg00259.html (9,832 bytes)

375. Re: [Amps] Attenuator needed (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 15 Nov 2010 13:45:01 -0800
I need about 10w drive for my 813's, so the 6 db attenuator will bump this up to 40w, dissipating 30w. That should be fine, especially since it will be used for CW. -- Vic, K2VCO Fresno CA http://www
/archives//html/Amps/2010-11/msg00261.html (11,153 bytes)

376. Re: [Amps] Attenuator needed (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Mon, 15 Nov 2010 17:00:30 -0800
The attenuator is inside the amp, so it doesn't affect anything when the amp is bypassed. One nice feature when using a solid-state driver is that a 6 db attenuator guarantees that the swr to the exc
/archives//html/Amps/2010-11/msg00264.html (8,887 bytes)

377. Re: [Amps] Suggestions - I broke my amp - part 2 (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Tue, 16 Nov 2010 18:44:37 -0800
Check that the bandswitch contacts haven't burned off. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _______________________________________________ Amps mailing list Amps@contesting.com http://l
/archives//html/Amps/2010-11/msg00285.html (10,100 bytes)

378. Re: [Amps] Building a Mock Up (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Wed, 17 Nov 2010 10:36:37 -0800
I made paper cutouts of parts and moved them around on the chassis. Just two-dimensional, though. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _______________________________________________ Amp
/archives//html/Amps/2010-11/msg00309.html (8,330 bytes)

379. Re: [Amps] Plated screws (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Fri, 19 Nov 2010 08:05:23 -0800
Some years ago I noticed that the (steel) screw that held the ground lug for the B+ bypass capacitor in a relatively low-powered (single 813) amplifier appeared to have oxidized. This screw was close
/archives//html/Amps/2010-11/msg00357.html (11,082 bytes)

380. Re: [Amps] T-T Titan 425 (score: 1)
Author: Vic K2VCO <vic@rakefet.com>
Date: Thu, 02 Dec 2010 20:35:08 -0800
If they are in parallel and touching each other, and they are all facing the same way, the full HV is being applied to the thin ceramic coating over the leads! Take a couple of discs and look at them
/archives//html/Amps/2010-12/msg00015.html (8,197 bytes)

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