Lee Mushel
Fri, 05 Feb 2010 05:51:24 -0800
Folks,I have been watching this thread with considerable interest and amusement! And I was pleased to find that a few hardy individuals are actually going to build speaker (systems) and sincerely and enthusiastically wish them well since I first experienced this pleasure in 1954. They may even eventually reach the point where their enclosures are masonry and the number of drivers reach nearly 200. If you follow the audio cable from the back of my Flex5000 you might find a retired stereo receiver that originally cost more than a Flex3000. And it does work well, indeed. I wouldn't hesitate to recommend that you combine audio and ham radio hobbies! However, please don't start to transmit audio frequencies that result in use of unreasonably big gobs of our limited bands! Thoughtful people will try to keep their audio quality desires under control! But you might want to think about correctly selected common mode ferrite chokes.
73 Lee K9WRU----- Original Message ----- From: "Richard W. Solomon" <w1...@earthlink.net>
To: <flexradio@flex-radio.biz> Sent: Friday, February 05, 2010 12:08 AM Subject: Re: [Flexradio] Speaker project (was the 'bose speakers')
Radio Shack sold a small Stereo Amplifier that appears on the "evil empire" every so often. I use one with a pair of Bose "Cube" speakers. Works very well. 73, Dick, W1KSZ -----Original Message-----From: Tim Ellison <telli...@itsco.com> Sent: Feb 5, 2010 12:02 AMTo: "audio...@charter.net" <audio...@charter.net>, Dudley Hurry <jhu...@austin.rr.com>Cc: 'FLEX USERS' <flexradio@flex-radio.biz> Subject: Re: [Flexradio] Speaker project (was the 'bose speakers') You could use a stereo kit PA. Like one of these http://www.electronickits.com/kit/complete/complete.htm#Amplifier%20Kits%20And%20Modules -Tim -----Original Message-----From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Jim BarberSent: Thursday, February 04, 2010 11:42 PM To: Dudley Hurry Cc: 'FLEX USERS' Subject: Re: [Flexradio] Speaker project (was the 'bose speakers') Hi Dudley,The time... The 'audioguy' always has the time for speaker projects, but I'll concede that you may not. :-)The size - yes, even the "small" version may be bigger than a pair of micro PC speakers. Once cab I was tinkering with tonight is 6x6x6"internal volume and made from 1/2" MDF. They can get bigger and smaller.Well shielded from RF - That will be attended to in the separate amplifier section. Both for goes-in and goes-out, since the amp module I'm working with is Class D and can generate some hash unless put in a metal box and bypassed/choked. If someone comes up with an inexpensive linear amp module, kit or design that meets spec we can look at that too. Class D is nice because it can be tucked away in a diecast box without heat issues.Sound quality vs size - not sure what you mean there. The point of doing this is to build a first rate speaker. Unless you're talking trade-off, which is a matter of preference. You may prefer small for convenience. I'm a believer that where speakers are concerned, QRO is the way to go, although a 7" cube isn't what I'd call all THAT large.Price - It would be tough to match the $69 you mention, yes. The smaller design may do it, we'll certainly try.73, Jim, N7CXI (going where angels fear to tread) Dudley Hurry wrote:Jim, There are just a few issues with the speaker project as far as I am concerned, for the Flex. . First is the time. Second the size Third being well shielded from RF. Fourth, guess sound quality verses size. I have been extremely happy with my Boses, mainly for the sound/size, they will fit in a brief case, sound very good for the size, even in CW, and were only $69.. And they are well shielded, and self powered.. Very hard to beat.. Now for my stereo system, I just might do something like that, a good set , even in a kit will be in the $350 range. Good luck in the project 73, Dudley WA5QPZ Jim Barber wrote:Tim, W4TME made some excellent suggestions regarding the speaker project.I'll work up a high quality, medium-size design as a "case study", then provide notes, design details and construction info for perhaps two alternatives - one larger and one smaller, for example. That way those who really want to dig into the details can, while those that just want to build a great-sounding speaker for their great-sounding radio can do that too. Suitable amplifiers will be handled as a separate section, since in some cases it won't be required. 73 and more later, --jim Jim Barber, N7CXI _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/_______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/_______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/_______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
_______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/