- 1. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: dstewart <wsmc551@gmail.com>
- Date: Tue, 08 Mar 2011 06:45:05 -0800
- Paul, the vacuum relay in the current 8410's is very quite. I made a quick video of the amp last night, not the best, but its fun to watch anyway. If you turn up the volume you can just hear the amp
- /archives//html/Amps/2011-03/msg00064.html (9,300 bytes)
- 2. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: "Paul Christensen" <w9ac@arrl.net>
- Date: Tue, 8 Mar 2011 13:33:03 -0500
- A bit off-topic, but I've never understood why an ATU needs a cooling fan -- and for a manufacturer to make it a selling point :-) Paul, W9AC _______________________________________________ Amps mai
- /archives//html/Amps/2011-03/msg00065.html (7,878 bytes)
- 3. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: "Bill, W6WRT" <dezrat1242@yahoo.com>
- Date: Tue, 08 Mar 2011 16:46:15 -0800
- ORIGINAL MESSAGE: REPLY: The DL5K is a dummy load, not an antenna tuner. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c
- /archives//html/Amps/2011-03/msg00069.html (8,858 bytes)
- 4. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: Alek Petkovic <vk6apk@bigpond.com>
- Date: Wed, 09 Mar 2011 06:58:09 +0800
- All tuners have losses. Losses create heat. You can't change physics. I guess Palstar acknowledges that fact. 73, Alek. VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap _______________
- /archives//html/Amps/2011-03/msg00070.html (9,238 bytes)
- 5. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: Commander John <crazytvjohn@yahoo.com>
- Date: Tue, 8 Mar 2011 17:54:54 -0800 (PST)
- The AT5K fan is louder than my commander's was. More important the built in balun saturates quite easily with feed line pickup john W9ZY -- > > You sure can hear the Palstar _________________________
- /archives//html/Amps/2011-03/msg00071.html (8,473 bytes)
- 6. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: "Paul Christensen" <w9ac@arrl.net>
- Date: Wed, 9 Mar 2011 11:35:58 -0500
- True, but I'm referring to their past ATU designs with cooling fans. Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm
- /archives//html/Amps/2011-03/msg00073.html (9,312 bytes)
- 7. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: "Paul Playford" <paul@w8aef.com>
- Date: Wed, 9 Mar 2011 10:08:15 -0700
- I have designed and built a 20m 1.5 Kw bandpass filter that has .4 dB insertion loss. After 30 seconds at 1.5 Kw it gets HOT! .4 dB loss from 1.5 Kw is 165 watts. When was the last time you grabbed a
- /archives//html/Amps/2011-03/msg00075.html (9,986 bytes)
- 8. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: Ron Youvan <ka4inm@tampabay.rr.com>
- Date: Wed, 09 Mar 2011 12:42:36 -0500
- I have never heard of a HAM tuner with a cooling fan what make and model/s is it? Normally antenna tuners do not absorb enough energy to require cooling. -- Ron KA4INM - Endless Loop: n. see Loop, En
- /archives//html/Amps/2011-03/msg00077.html (9,739 bytes)
- 9. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: "Paul Christensen" <w9ac@arrl.net>
- Date: Wed, 9 Mar 2011 12:49:52 -0500
- That's just a bit more than 10% of maximum delivered power and cabinet ventilation openings should provide ample convection. Take for example the AT4K ATU. Into a 1:1 resistive 50-ohm load on 40m, lo
- /archives//html/Amps/2011-03/msg00078.html (11,367 bytes)
- 10. Re: [Amps] New Alpha 8410 photos + Video (score: 1)
- Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
- Date: Wed, 09 Mar 2011 12:27:42 -0500
- Paul, A cooling fan is very useful in a high power antenna tuner, where heating generally occurs on one component (usually the inductor). The fan moves the air around preventing the development of h
- /archives//html/Amps/2011-03/msg00079.html (9,823 bytes)
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