[Elecraft] Amplifier for K-2/10
I know about the KPA/100 option for the K-2, but wonder if there are any alternatives for obtaining 100 watts output or better from the K-2. I am looking for an amplifier that might produce 100 watts or better with an input of only 10 watts from the K-2. If anyone knows of one out there it would be interesting to have that information posted here. I would find a separate amplifier unit more convenient than an internal upgrade to the K-2. Thanks. KM4VX -- View this message in context: http://n2.nabble.com/Amplifier-for-K-2-10-tp3129848p3129848.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] Amplifier for K-2/10
Ron, Your best bet is a KPA100 - it couples with the K2 and everything is automatic in operation. I recall that the FCC requires amplifiers which operate with less than 50 watts input to be sold legally in the US, so you do not see many amplifiers with 100 watts out and 5 or 10 watts in that can operate in the 25 MHz region - remember the CB amplifer problems. However, if a linear amplifier is capable of 500 or 600 watts output with 50 or 60 watts input, then it should produce about 100 watts out with 10 watts in. So if you have such a linear amp already, hook it up. You can use the N0SS amp keying kit or the WA6HHQ amp keying circuit shown on the Elecraft website - Builders Resource page - Application Notes. Your other possibility is to homebrew an amplifier. If you have tubes, a pair of 6146s or 807s or 1625s would do the job and require a lot less than 10 watts drive (assuming grid driven). There are several amplifier kits available, but many are the amp only and do not include low pass filters nor T/R switching. If you have the K60XV option in your K2 (Sorry, but I can't remember), there is an amp keying circuit on that board already, all you would need is a jack to bring it out. 73, Don W3FPR KM4VX wrote: I know about the KPA/100 option for the K-2, but wonder if there are any alternatives for obtaining 100 watts output or better from the K-2. I am looking for an amplifier that might produce 100 watts or better with an input of only 10 watts from the K-2. If anyone knows of one out there it would be interesting to have that information posted here. I would find a separate amplifier unit more convenient than an internal upgrade to the K-2. Thanks. KM4VX No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.12.83/2191 - Release Date: 06/21/09 05:53:00 __ 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
Re: [Elecraft] Amplifier for K-2/10
Try http://www.communication-concepts.com/ I built one of their 140 watt amps for a 20 meter HB SSB rig. I only have it configured for one band, 20 meters, but left room to add filters for all HF bands. It works great. Frank - W4NHJ - Original Message - From: KM4VX ronce...@earthlink.net To: elecraft@mailman.qth.net Sent: Sunday, June 21, 2009 4:32 PM Subject: [Elecraft] Amplifier for K-2/10 I know about the KPA/100 option for the K-2, but wonder if there are any alternatives for obtaining 100 watts output or better from the K-2. I am looking for an amplifier that might produce 100 watts or better with an input of only 10 watts from the K-2. If anyone knows of one out there it would be interesting to have that information posted here. I would find a separate amplifier unit more convenient than an internal upgrade to the K-2. Thanks. KM4VX -- View this message in context: http://n2.nabble.com/Amplifier-for-K-2-10-tp3129848p3129848.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] Amplifier for K-2/10
See http://www.hfprojectsyahoo.com/ Leigh/WA5ZNU I know about the KPA/100 option for the K-2, but wonder if there are any alternatives for obtaining 100 watts output or better from the K-2. I am looking for an amplifier that might produce 100 watts or better with an input of only 10 watts from the K-2. If anyone knows of one out there it would be interesting to have that information posted here. I would find a separate amplifier unit more convenient than an internal upgrade to the K-2. Thanks. KM4VX __ 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
Re: [Elecraft] Amplifier for K-2/10
Leigh, I've asked this question recently but have not received and responses. Perhaps there are a couple of folks out there that have found a compatible amp that can provide 100W or a bit more. QSK would be a FB added attraction. Dick, K2ZR Leigh L. Klotz, Jr WA5ZNU wrote: See http://www.hfprojectsyahoo.com/ Leigh/WA5ZNU I know about the KPA/100 option for the K-2, but wonder if there are any alternatives for obtaining 100 watts output or better from the K-2. I am looking for an amplifier that might produce 100 watts or better with an input of only 10 watts from the K-2. If anyone knows of one out there it would be interesting to have that information posted here. I would find a separate amplifier unit more convenient than an internal upgrade to the K-2. Thanks. KM4VX __ 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
Re: [Elecraft] Amplifier for K-2/10
I have an amp that low in puts out 140 w, a pair of NTE 335's. I don't remember who made it, something like CCS I can't remember the add. Probably not much help but let's you know there is hope! I'll dig around I have some notes somewhere. Paul K7PM __ 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
Re: [Elecraft] Amplifier for K-2/10
I've been contemplating putting the KPA/100 in a seperate enclosure.. and running with the K2, optionally to feed the KPA or not... but keeping it seperate from the K2. Are there any particular problems with that process? And I am with Dick.. QSK is paramount, with or without the amp. --... ...-- Dale - WC7S in Wy _ Lauren found her dream laptop. Find the PC that’s right for you. http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290 __ 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
