Hi Bob, I will apologize because I responded to quickly thinking all Hams are like me...by bad habit. I will not listed here problems faced with not properly designed ALC's during the past and as Hams we are suppose to go a bit further to keep the maximum of our equipment...within the limits. As the original importer it is your duty to write it and I fully agee with your comments. ALC is useful for full auto Amps, specially the solid states one. During my all career in Telecoms started 1972, I never burned any Amp (Ham & Broadcast), solid state or valves by overdriving. But I read carefully the specs before testing any new equipment and have costly equipment in my pro lab to monitor it, that is not the case of most of Hams. So again mea culpa. Bst 73's Philippe A65BI K3#3616 "By Hams, for Hams...What else ?"
Philippe TROTTET Head of Field Telecom Unit - DUBAI United Nations High Commissioner for Refugees International Humanitarian City Office Building Nº3 - Room 2, 1st Floor Doha Street PO BOX: 506013 DUBAI - U.A.E. Dubai time: GMT +4 W: Sunday to Thursday HQ Ext: 7120 Vsat: xx 41 22 7120 External: +971 4 3601753 +41 22 739 7120 Mobile: +971 504531756 Website: www.unhcr.org ( http://www.unhcr.org/ ) >>> "Bob Naumann" <w...@w5ov.com> 21-04-2010 16:36 >>> Before this faulty opinion proliferates any further; what applies to tube amps does not follow with solid state amps. ALC is required by most manufacturers of solid state amps to prevent overdriving and the resulting damage to the amplifier. ALC is the mechanism used to achieve this protection. We were the original USA importer of the Expert 1KFA and it requires ALC. Tokyo Hy-Power does as well. Can you manually limit your output from your radio and avoid damage? Yes. Even so, why take the risk? Hook up the ALC and adjust it according to the amplifier manufacturer's instruction. If it is not working correctly, refer the problem to the amplifier manufacturer or dealer. So, please do not advise someone with a solid state amp to disconnect their ALC- unless you want to assume the cost of repairs. 73, Bob W5OV Array Solutions (Tokyo Hy-Power Dealer) -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Philippe Trottet Sent: Wednesday, April 21, 2010 2:52 AM To: Franco Cazzaniga; Arie Kleingeld PA3A Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 and Expert 1K-FA Hi Franco, Fully agree Arie's comments, I'm not using an auto Amp. only a manual one with a Russian tetrode, and only checked on the K3 that the time delay corresponds to the amp specs and that's all. With my K3-100, most of the time I'm driving it with 12W and the output with my amp is ±350W thats cover most of my applications. At 13W it engage the KPA100 for higher power needs. Just set the K3 to the power level you want to use without going over the specs of your equipment. Bst 73's Philippe A65BI >>> "Arie Kleingeld PA3A" <p...@xs4all.nl> 21-04-2010 11:25 >>> Franco, Forget about the ALC. Up till now I have never used the ALC between my TRX and PA. No need to. Just gently set the power of the trx yourself to drive the PA to the right powerlevel and go. 73 Arie PA3A -----Oorspronkelijk bericht----- Hello I use the Expert 1K-FA with K3 full power and ALC , but i think i have two issue. When i use K3 full power ( with Expert full power ) the rig output is not stable but fluctuates around 15 watt and more or less of 5 watt , and of course the output of Expert varies consequently . When i use Expert half power i have not issue , the input and output power are stable. Another issue is that when i put the Expert in STBY , the K3 output power does not return instantly at 100 w , but slowly in 3 - 4 seconds. When i not use the ALC i have not issue. Thank you Franco I6QFZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
