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Total 6 documents matching your query.

1. [AMPS] QRO TORROID (WAS MORE USEFUL SUPPLY. (score: 1): Author: zellmer@raccoon.com (Jim Zellmer); Date: Sun, 23 Jan 2000 09:43:38 -0600; Rich and Plil have had an interesting discussion on torroid types, Here is a follow up question. If the type 61 starts to saturate at 10 MHz and is good to 30 MHZ at QRPP levels, what types are good; /archives//html/Amps/2000-01/msg00485.html (8,047 bytes)
2. [AMPS] QRO TORROID (WAS MORE USEFUL SUPPLY. (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 23 Jan 2000 21:13:53 -0600; That is a 4:1 un un transformer to step 200 ohms down to 50 ohms. The harmonic attenuation is the same as a Pi network, but this method is much cheaper to produce than either a Pi or a Pi L tank cir; /archives//html/Amps/2000-01/msg00490.html (8,492 bytes)
3. [AMPS] QRO TORROID (WAS MORE USEFUL SUPPLY. (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 23 Jan 2000 21:39:13 -0700; levels?.... Type 43 is ok up to 50MHz. You can stack 2.4" cores for more power handling ability. Check for core saturation by checking UHF TV channels. Ordinary #12 TFE hookup wire is good. Tape cor; /archives//html/Amps/2000-01/msg00492.html (8,164 bytes)
4. [AMPS] QRO TORROID (WAS MORE USEFUL SUPPLY. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 24 Jan 2000 16:23:32 -0000; case If it's a transmission line transformer, it has to be a very high mismatch to screw things up badly. Of course, it isn't a balun, so the balance requirements don't exist, possibly easing matters; /archives//html/Amps/2000-01/msg00503.html (8,140 bytes)
5. [AMPS] QRO TORROID (WAS MORE USEFUL SUPPLY. (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 24 Jan 2000 10:10:15 -0700; With 200-ohms unbalanced in and 50-ohms unbalanced out, it has to be a transmission line transformer. later, Peter - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesti; /archives//html/Amps/2000-01/msg00508.html (8,287 bytes)
6. [AMPS] QRO TORROID (WAS MORE USEFUL SUPPLY. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 26 Jan 2000 08:55:29 -0000; be >a transmission line transformer. No, it doesn't. It could be done as a conventional transformer with a 2:1 winding ratio. Not that I'd advise it.............not for power anyway, although for rec; /archives//html/Amps/2000-01/msg00531.html (8,911 bytes)

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