Tom, KAT500 has built-in internal frequency counter for auto band switching. The supplied cable with KAT500 will be good enough. The aux cable will be more useful if you eventually have the KPA500.
I suggest you download the operation manual of KAT500. There are connection diagram inside the manual which will give you very good ideas. 73 Johnny Vr2XMC ________________________________ 寄件人︰ tom armour <wa...@hotmail.com> 收件人︰ "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> 傳送日期︰ 2014年01月25日 (週六) 10:27 AM 主題︰ Re: [Elecraft] K3 to KAT500 ThanksGreat input so far!It is really helping me finalize my decision. A few more notes/questions:I have an old tube amp (fl-2100) that does about 600w max I intend to use until I get the money together for a KPA500. I currently use a manual tuner that I could potentially put in line if I want to run QRP.I do not intend to move the K3 a lot. I have another radio I can use portable. With the old amp should I have an AUX cable? or is the RCA cables Rig->KAT500->Amp enough? 73 - Tom - wa4ta > Date: Sat, 25 Jan 2014 09:27:07 +0800 > From: vr2...@yahoo.com.hk > To: elecraft@mailman.qth.net > Subject: [Elecraft] K3 to KAT500 > > Apart from Jim's advice below, I would supplement as follows: > > 1. If you have no intention to take K3 as portable use or your K3 is a > station rig, I would go for KAT500. This will give you the future liberty of > buying a KPA500 or other linear amplifier. > 2. Once you have a linear, the internal KAT3 tuner will become redundant. > In fact, I sold the KAT3 to subsidize the purchase of KAT500. I am using KX3 > for portable use. > > 73 > > Johnny VR2XMC > > > ________________________________ > 寄件人︰ Jim Brown <j...@audiosystemsgroup.com> > 收件人︰ elecraft@mailman.qth.net > 傳送日期︰ 2014年01月25日 (週六) 8:04 AM > 主題︰ Re: [Elecraft] K3 to KAT500 > > > On 1/24/2014 3:52 PM, tom armour wrote: > > If I buy a K3/100 without auto tuner and a KAT500 is there any additional > > cable I need (other than coax) to connect the two together? > > Some folks feel the need for an AUX cable to tell the KAT500 what band > it is on. I don't, because the KAT500 has a very fast frequency counter > that can figure that out with a short burst of RF. > > > or does KAT500 come with all cable beeded to connect it to the K3? > > Yes. > > I see a cable for KAT500 to KPA500 but not to the K3. > > Yes. To prevent damage to its relays, the KAT500 must be able to > interrupt the keying line to any power amp that is used. It has an RCA > input, and an RCA output. So ONLY if you're running an amp, you need an > RCA-RCA between rig and KAT500, and another between KAT500 and power amp > PTT. > > > Is there anything I'll be missing with the KAT500 vs the internal tuner > > other than portability? > > QRP autotune -- the KAT500 is optimized for high power, and doesn't > autotune very well below about 10W. > > 73, Jim K9YC > > > ______________________________________________________________ > 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
