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References: [ +from:amps@txrx.demon.co.uk: 190 ]

Total 190 documents matching your query.

101. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Tue, 9 Feb 1999 07:29:30 +0000; I'd guess that the phase changes the cable introduces at harmonic frequencies has a lot to do with it. The loss in a foot of RG58 even at 150MHz is small. Steve -- FAQ on WWW: http://www.contesting.c; /archives//html/Amps/1999-02/msg00293.html (8,717 bytes)
102. [AMPS] coil form plastics (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sun, 14 Feb 1999 07:37:15 +0000; Radiospares/Electromail over here. Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amp; /archives//html/Amps/1999-02/msg00370.html (8,286 bytes)
103. [AMPS] 6m amp (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 15 Feb 1999 07:11:50 +0000; How are you measuring the output power? Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owne; /archives//html/Amps/1999-02/msg00389.html (8,244 bytes)
104. [AMPS] Construction techniques (score: 1): Author: amps@txrx.demon.co.uk (amps@txrx.demon.co.uk); Date: Thu, 18 Feb 1999 07:02:52 +0000; Steel dissolves in battery acid. If that doesn't work, while at A&E you could ask to use an NMR scanner magnet :-) Seriously though, I thought your skin was thick enough not to suffer that way. See y; /archives//html/Amps/1999-02/msg00461.html (8,458 bytes)
105. [AMPS] SB220 Xformer labodomy (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Fri, 19 Feb 1999 08:18:25 +0000; Yacht varnish appears to work well. We submerged the tfr for 24hrs and let it dry for a week or so. Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Adminis; /archives//html/Amps/1999-02/msg00523.html (8,419 bytes)
106. [AMPS] SB220 Xformer labodomy (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sat, 20 Feb 1999 18:02:52 +0000; Good point - our need was only external protection. Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Pr; /archives//html/Amps/1999-02/msg00596.html (9,145 bytes)
107. [AMPS] 30S1 (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 22 Feb 1999 07:29:17 +0000; A question on behalf of a friend: Is is possible to drop in a 4CX1500 in instead of the 1000? What mods/adjustments are needed? Is it worth doing? Thanks, Steve -- FAQ on WWW: http://www.contesting.c; /archives//html/Amps/1999-02/msg00597.html (6,479 bytes)
108. [AMPS] 3-500Z chimneys (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 22 Feb 1999 07:27:08 +0000; I've not done it personally, but a friend built a couple of 6m amps with 5-500s. One used the glass off a camping gas lamp, the other used a roll of PTFE sheeting. Both have worked well for some year; /archives//html/Amps/1999-02/msg00598.html (7,803 bytes)
109. [AMPS] resistors (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 22 Feb 1999 07:58:35 +0000; snip The mechanisms causing apparent recharge were discussed in good detail by Bob Pease of NatSemi in Electronics magazine (I think) a few months ago. I'll post a reference when I find it. Steve --; /archives//html/Amps/1999-02/msg00600.html (9,382 bytes)
110. [AMPS] resistors (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Wed, 24 Feb 1999 11:24:32 +0000; The magazine is Electronic Design. Steve -- Steve Thompson -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com P; /archives//html/Amps/1999-02/msg00649.html (10,553 bytes)
111. [AMPS] How much screws on top cover of 2m W6PO 8877 amp? (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Fri, 26 Feb 1999 18:45:26 +0000; On a 19" x 12" panel, screws round the edge at 70mm centres killed radiation up to 1GHz. As supplied the box had 210mm centres on the screws and there was significant radiation above 500MHz. It also; /archives//html/Amps/1999-02/msg00681.html (9,216 bytes)
112. [AMPS] Hamfest amp (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Fri, 26 Feb 1999 18:36:29 +0000; snip Is it me, or do people involved long term with industrial QRO tend to have wild white hair, and be a bit batty? I'm heading that way... Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html; /archives//html/Amps/1999-02/msg00682.html (7,720 bytes)
113. [AMPS] RG-58: living dangerously? (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 18 Jan 1999 18:48:52 +0000; RG400 is the flexible inner PTFE double screened equivalent. Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesti; /archives//html/Amps/1999-01/msg00254.html (8,095 bytes)
114. [AMPS] RE;Questions on home brew ps (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Fri, 4 Dec 1998 07:08:56 +0000; Be careful which standard formulas you use. In a cap. input supply, the short duration current spikes give a heating effect which can be much higher than a continuous current value calculated from th; /archives//html/Amps/1998-12/msg00042.html (9,624 bytes)
115. [AMPS] Tank coil question & other stuff (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Fri, 4 Dec 1998 10:40:34 +0000; Should do - Often the accuracy on Z meters goes out a bit at 1000's ohms so it's also worth doing it the other way round - replace the tubes with equivalent R/C combinations and look for 50 ohms look; /archives//html/Amps/1998-12/msg00059.html (7,926 bytes)
116. [AMPS] RE;Questions on home brew ps (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sat, 5 Dec 1998 08:13:22 +0000; My transformer man told me the same, then told me the price :-( Steve -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/1998-12/msg00081.html (7,689 bytes)
117. [AMPS] Hypersil transformers (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 7 Dec 1998 07:26:23 +0000; Thanks to Phil, VE3OZZ for his private comments to me. I'm sorry to send a reply via the reflector but his message came in appearing as if it had come from Rich. Wierd... Steve -- FAQ on WWW: http://; /archives//html/Amps/1998-12/msg00113.html (7,313 bytes)
118. Fw: [AMPS] tuning capacitor & insulator (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sun, 20 Dec 1998 08:48:01 +0000; BIG SNIP I think not - the impedance the tube sees is set by the matching components between the tube and the antenna. When you drive at lower power than max, the load is lower impedance than ideal f; /archives//html/Amps/1998-12/msg00296.html (10,254 bytes)
119. Fw: [AMPS] Anode load line calculations. (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Tue, 22 Dec 1998 08:01:16 +0000; It definitely does not. Very simplistically, reducing the drive reduces the grid voltage swing which reduces the anode current swing (Ia is related to gm x Vg); the reduced anode current swing throug; /archives//html/Amps/1998-12/msg00319.html (10,331 bytes)
120. [AMPS] Parallel power transformers (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sun, 8 Nov 1998 21:41:22 +0000; Instead of putting the secondaries directly in parallel, feed each into a bridge and parallel the bridge outputs. This prevents any risk of reverse current flow. Steve -- FAQ on WWW: http://www.conte; /archives//html/Amps/1998-11/msg00117.html (7,804 bytes)

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