- 1. [Amps] Pair of SB-220s (score: 1)
- Author: donroden@hiwaay.net
- Date: Sat, 05 Sep 2009 23:39:41 -0500
- Not saying anybody WOULD,,,,,,,,,,, but if you COULD..... parallel a pair of SB-220s on a single band ? Wilkinson Power deviders / combiners for zero phase combining? A 90 degree network on the input
- /archives//html/Amps/2009-09/msg00053.html (6,589 bytes)
- 2. Re: [Amps] Pair of SB-220s (score: 1)
- Author: Roger <sub1@rogerhalstead.com>
- Date: Sun, 06 Sep 2009 02:10:12 -0400
- Welll... If you look inside some of the higher powered 2-meter amps you will find a pair of Push Pull amps running in parallel . You may even find 4 P-P amps combined in there. SS HF amps are a whole
- /archives//html/Amps/2009-09/msg00054.html (8,804 bytes)
- 3. Re: [Amps] Pair of SB-220s (score: 1)
- Author: "Alex Eban" <alexeban@gmail.com>
- Date: Sun, 6 Sep 2009 10:21:03 +0300
- Can be done! The best way is to use 3dB/90° hybrids since they tend to discourage oscillation and improve matching. They are also quite forgiving of imbalances in the amplifiers? input and output imp
- /archives//html/Amps/2009-09/msg00057.html (7,758 bytes)
- 4. [Amps] Pair of SB-220s (score: 1)
- Author: Paul Decker <kg7hf@comcast.net>
- Date: Sun, 6 Sep 2009 15:20:26 +0000 (UTC)
- There is no reason that I know of it wouldn't and couldn't work. Like others have said, many VHF and some HF solid state amps use this method. You could have multiple splitters/combiners for vario
- /archives//html/Amps/2009-09/msg00061.html (8,009 bytes)
- 5. Re: [Amps] Pair of SB-220s (score: 1)
- Author: "DF3KV" <df3kv@t-online.de>
- Date: Sun, 6 Sep 2009 20:25:00 +0200
- It will work with 1/4 coax transformers, but I would always prefer wide band 2:1 ferrite transformers (as used in stack matches)plus a variable phase shifter in one channel. I did that in the past wi
- /archives//html/Amps/2009-09/msg00063.html (8,336 bytes)
- 6. Re: [Amps] Pair of SB-220s (score: 1)
- Author: "Gary Smith" <wa6fgi@sbcglobal.net>
- Date: Sun, 6 Sep 2009 11:42:20 -0700
- Is this possibly the way (Wilkinson combiner/splitter) that Ameritron gets 1200w out of their new (ALS-100) SS amp? 73, Gary...wa6fgi It will work with 1/4 coax transformers, but I would always prefe
- /archives//html/Amps/2009-09/msg00064.html (8,796 bytes)
- 7. Re: [Amps] Pair of SB-220s (score: 1)
- Author: "Joe Subich, W4TV" <lists@subich.com>
- Date: Sun, 6 Sep 2009 15:55:10 -0400
- Yes, they use two ALS-600 boards with splitters in the input and combiners on the output. However, instead of Wilkinson combiner/splitters Ameritron is using broadband devices. The ALS-1300 manual (
- /archives//html/Amps/2009-09/msg00065.html (11,228 bytes)
- 8. Re: [Amps] Pair of SB-220s (score: 1)
- Author: "Carl" <km1h@jeremy.mv.com>
- Date: Sun, 6 Sep 2009 16:13:13 -0400
- That method works fine for polarization diversity especially on the low bands. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.
- /archives//html/Amps/2009-09/msg00066.html (9,244 bytes)
- 9. Re: [Amps] Pair of SB-220s (score: 1)
- Author: Geert Stams <geert.st@gmail.com>
- Date: Sun, 06 Sep 2009 09:27:51 +0200
- On 432MHz Tim Pettis KL7WE used to activiate a number of states on EME with a couple of K2RIW amplifiers parallelled with an hybrid made out of coax http://pa3csg.hoeplakee.nl/Boek/BoekH1/art1-26.htm
- /archives//html/Amps/2009-09/msg00079.html (9,804 bytes)
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