The QST review linked from the web site doesn't look very good and say's the amp can be USER MODIFIED to operate at up to 30MHz ;o)
73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Sat, 17 Mar 2012 12:24:51 -0700 (PDT), WILLIS COOKE <wrco...@yahoo.com> wrote: >I still maintain that someone who is trying to learn CW and still needs a >computer to send and possibly to receive should stay with a basic transceiver >for a while until he learns to operate CW without a computer. He should not >purchase a pin diode assembly that is 6" X 4" x 9 1/2" to work with his "base >station" amplifier which is 11" x 12" x 6" and needs an 90 amp 12 volt power >supply for CW until he learns to operate CW. The K3, which I presume he has >the 100 watt model since the low power conversion will not furnish the 50 to >90 watts specified for input to the SG-500. 100 watts is enough power for a >lot of nice CW contacts, even 10 watts will do the trick with a reasonably >good antenna. Most manufacturers find it unwise to try to run 500 watts PEP >with transistorized amplifiers supplied with 12 or 14 volts and design for 40 >or more volts. The web site for SGC does not show any particular expertise or >make any claims for purity of signal. > Maybe they are great, but I am not convinced. > >That being said, I fully support CW operation and love it myself. I think >everyone who is the least bit inclined to do so learn to operate CW. I like >to operate QSK very much with my K3 and do often operate with 500 watts QSK, >but most of the time I don't need that much power. I do indeed wish Don the >very best experience in learning CW, but I think that trying to tame the >SG-500 at the same time will make it more difficult than it needs to be. > >Willis 'Cookie' Cooke >K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart > > >________________________________ > From: Bob Nielsen <n...@clearwire.net> >To: Elecraft List <elecraft@mailman.qth.net> >Sent: Saturday, March 17, 2012 12:41 PM >Subject: Re: [Elecraft] K3 Break in with an amp question > >Ameritron sells a PIN diode switch assembly >(http://www.ameritron.com/Product.php?productid=QSK-5) which can be used for >this purpose. > >Bob N7XY > >On Mar 17, 2012, at 9:18 AM, donehrl...@q.com wrote: > >> The powercube is definitely a ham amplifier. I know of at least one >> owner who is very happy with the one he has but, then, he only operates SSB. >> >> Most amps that use relay T/R switching (and that is *most* amps) do the >> clickety-clack thing. I know of failed relays that could not take the >> abuse. Your solution of using semi-breakin with an appropriate delay is >> the only way to avoid this problem. With my new KPA500 I no longer have >> that problem but, with my previous Tokyo HyPower amp, I used a homebrew >> PIN Diode switching system to do all of my T/R antenna switching with >> all solid state circuitry but that is not a trivial exercise. >> >> Don K7FJ >> >> >> >> >> On 3/17/2012 4:49 AM, gold...@charter.net wrote: >>> I am attempting to slowly learn to work with CW but at first it is with >>> a computer program but I am not sure if that is relevant. >>> >>> I understand the reason for break in as it allows for RX listening >>> between your TX in case someone it trying to contact your. >>> >>> The issue is that when using VOX and with semi or full breakin when >>> using my amp the relays in the amp are clicking and clacking like crazy >>> which to me seems very abusive to the amp. My solution has been to go >>> to semi break in and then set a long delay time so the amp and K3 stay >>> keyed. >>> >>> The amp is an SGC powercube and I do have it wired to the K3 so it gets >>> a PTT signal. >>> >>> Am I doing the right thing with the delay or are there other ways to >>> stop the amp from going nuts or is this just the nature of the beast. >>> >>> >>> ~73 >>> Don >>> KD8NNU >>> >>> ______________________________________________________________ >>> 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 > >_____ >N7XY DX Cluster Node - telnet to n7xy.net, port 7300 > > > > > >______________________________________________________________ >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
