Re: [Elecraft] Re: Perfect K3 Speaker
Wayne, I'm curious about what seems to be an emphasis on non-powered speakers in your reply... why? My op bench was getting overrun with speakers for various rigs. I picked up an 8 channel stereo line level mixer and now run everything through a single set of powered PC speakers. The mixer (Behringer RX-1602) automatically mixes mono inputs as L+R and has a separate level adjustable stereo headphone output. Each input can be individually switched on/off. I did have to make a handful of isolation transformers to get rid of some ground loops but the mixer powered speakers tolerate legal limit RF levels well. 73, Bill N2BC (checking every email now, waiting for my Katie-gram on a December K3 order!) - Original Message - From: wayne burdick [EMAIL PROTECTED] To: Bruce Osterberg [EMAIL PROTECTED] Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, May 03, 2008 11:43 PM Subject: [Elecraft] Re: Perfect K3 Speaker Hi Bruce, For communications bandwidths, a sturdy 4-ohm, 3 or 4 diameter mobile speaker (non-powered) does a great job. For a bit more fidelity and to take advantage of the K3's stereo speaker outputs, I use a pair of good quality bookshelf-style speakers (again, non-powered). Right now I'm using Best Buy's Insignia, 4-inch, 3-way surround speakers, which sound quite good, although they're 8 ohms rather than 4 so the available per-channel peak power will be lower. They're about 4W x 8H. I had been using just a single speaker, but having two allows me to get L/R separation of the main and subreceivers, as well as take advantage of the K3's AFX simulated stereo mode. 73, Wayne N6KR On May 3, 2008, at 7:05 PM, Bruce Osterberg wrote: Good Evening: If I was to add an external speaker to the K3 what would it be, looking for suggestions as Dayton is just around the corner. 73 Bruce N9BX K3 # 775 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] re: Perfect K3 Speaker
Bruce, I am using and happy with a pair of Radio Shack Optimus XTS25 bookshelf speakers; I think this model is discontinued. I would think most bookshelf speakers would be good. My particular model is 8 ohms designed for 10 watts rms up to 20 watts max and I have room filling sound if I choose, it has a single 4-inch speaker and stands 6 1/2 inches tall. I normally run the AF gain at the 9 o-clock position. There are a lot of speakers out there that are specified for 100 watts or more. I haven't tried one but I would be worried about sufficient audio level being driven by the low wattage K3. Most PC speakers are low wattage. eham has a section reviewing speakers for communication use. http://www.eham.net/reviews/products/29 Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) K3-100 #508/ KX1 #1311 --- Date: Sat, 3 May 2008 21:05:52 -0500 From: Bruce Osterberg [EMAIL PROTECTED] Subject: [Elecraft] Perfect K3 Speaker To: Elecraft Reflector elecraft@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=ISO-8859-1; format=flowed Good Evening: If I was to add an external speaker to the K3 what would it be, looking for suggestions as Dayton is just around the corner. 73 Bruce N9BX K3 # 775 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Perfect K3 Speaker
My pick is the RadioShack Optimus 8 or 11. I believe these are long out of production but widely available used on the Internet. I also second N4LQ's recommendation on the MFJ ClearTone for CW. I think the audio fullness of the existing K3 speaker could be substantially improved with the simple addition of a baffle. A few weeks ago, I looked at this and there appears to be just enough room to form a sealed square box around the speaker to form an infinite baffle. The problem with 99% of the existing communications speakers is that the path from the back-wave of the speaker is far too short and results in low-frequency cancellation. The baffle prevents back-wave and forward-wave cancellation. The result is substantially improved low-end content below 400 Hz. Paul, W9AC - Original Message - From: wayne burdick [EMAIL PROTECTED] To: Bruce Osterberg [EMAIL PROTECTED] Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, May 03, 2008 11:43 PM Subject: [Elecraft] Re: Perfect K3 Speaker Hi Bruce, For communications bandwidths, a sturdy 4-ohm, 3 or 4 diameter mobile speaker (non-powered) does a great job. For a bit more fidelity and to take advantage of the K3's stereo speaker outputs, I use a pair of good quality bookshelf-style speakers (again, non-powered). Right now I'm using Best Buy's Insignia, 4-inch, 3-way surround speakers, which sound quite good, although they're 8 ohms rather than 4 so the available per-channel peak power will be lower. They're about 4W x 8H. I had been using just a single speaker, but having two allows me to get L/R separation of the main and subreceivers, as well as take advantage of the K3's AFX simulated stereo mode. 73, Wayne N6KR On May 3, 2008, at 7:05 PM, Bruce Osterberg wrote: Good Evening: If I was to add an external speaker to the K3 what would it be, looking for suggestions as Dayton is just around the corner. 73 Bruce N9BX K3 # 775 --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Perfect K3 Speaker
On May 4, 2008, at 4:23 AM, Bill Coleman N2BC wrote: Wayne, I'm curious about what seems to be an emphasis on non-powered speakers in your reply... why? Hi Bill, Due to space limitations, I have a random wire antenna only 10' from the shack that I use on some band. Its RFI gets into powered computer speakers. So I turn them off when it's an issue, and use only unpowered speakers with the K3. The K3 can easily drive two good-size bookshelf speakers. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Perfect K3 Speaker
Hi Bruce, For communications bandwidths, a sturdy 4-ohm, 3 or 4 diameter mobile speaker (non-powered) does a great job. For a bit more fidelity and to take advantage of the K3's stereo speaker outputs, I use a pair of good quality bookshelf-style speakers (again, non-powered). Right now I'm using Best Buy's Insignia, 4-inch, 3-way surround speakers, which sound quite good, although they're 8 ohms rather than 4 so the available per-channel peak power will be lower. They're about 4W x 8H. I had been using just a single speaker, but having two allows me to get L/R separation of the main and subreceivers, as well as take advantage of the K3's AFX simulated stereo mode. 73, Wayne N6KR On May 3, 2008, at 7:05 PM, Bruce Osterberg wrote: Good Evening: If I was to add an external speaker to the K3 what would it be, looking for suggestions as Dayton is just around the corner. 73 Bruce N9BX K3 # 775 --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
