[AMRadio] Hallicrafters R-12 speaker
I am in need of diminsions, detailed photos, or whatever I can get of the R-12 bass reflex speaker. A very good friend of mine is a cabinet maker and is willing to build a replica of the R-12 for my SX-28. I know these are few and far between, but hope someone on the list might have one, and willing to make some accurate measurements, etc. Also while I'm at it, recommendations/sources for a 12 full range speaker would be appreciated. 73 Brian / wa5am -- Brian Sherrod, PA My website: http://www.w5ami.net wa...@arrl.net __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
Brian I buy most speakers from Parts Express. They have a lot of audio parts and equipment. (http://www.parts-express.com) Good Luck John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
who did the restoration of the SX 28A shown in the pictures in the link? Thanks and 73, John, K5PGW --- On Fri, 9/4/09, John Coleman j...@pctechref.com wrote: From: John Coleman j...@pctechref.com Subject: Re: [AMRadio] Hallicrafters R-12 speaker To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Friday, September 4, 2009, 5:18 AM Brian I buy most speakers from Parts Express. They have a lot of audio parts and equipment. (http://www.parts-express.com) Good Luck John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
If you are referring to the link posted yesterday, that's me, wa5am/brian. 73 On 9/4/09, John King k5...@yahoo.com wrote: who did the restoration of the SX 28A shown in the pictures in the link? Thanks and 73, John, K5PGW --- On Fri, 9/4/09, John Coleman j...@pctechref.com wrote: From: John Coleman j...@pctechref.com Subject: Re: [AMRadio] Hallicrafters R-12 speaker To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Friday, September 4, 2009, 5:18 AM Brian I buy most speakers from Parts Express. They have a lot of audio parts and equipment. (http://www.parts-express.com) Good Luck John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- Brian Sherrod, PA My website: http://w5ami.net Arkansas Amateur Community Forums - http://w5ami.net/forums wa...@arrl.net __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
Thanks Brian. That is a beautiful job!!! I have a nice but kinda dirty SX 28 A back home in Louisiana that I am going to restore when I return to Louisiana from NW Montana in about three weeks. I am not going to quiz you now because I know many others will be doing so. Will you be at Belton? Barbara and I will be there and I hope to meet you. We park on the side of the expo building in an Alfa See ya Coach. we will be there Thursday afternoon or Friday morning. 73, John, K5PGW --- On Fri, 9/4/09, WA5AM ars.w5...@gmail.com wrote: From: WA5AM ars.w5...@gmail.com Subject: Re: [AMRadio] Hallicrafters R-12 speaker To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Friday, September 4, 2009, 6:18 AM If you are referring to the link posted yesterday, that's me, wa5am/brian. 73 On 9/4/09, John King k5...@yahoo.com wrote: who did the restoration of the SX 28A shown in the pictures in the link? Thanks and 73, John, K5PGW --- On Fri, 9/4/09, John Coleman j...@pctechref.com wrote: From: John Coleman j...@pctechref.com Subject: Re: [AMRadio] Hallicrafters R-12 speaker To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Friday, September 4, 2009, 5:18 AM Brian I buy most speakers from Parts Express. They have a lot of audio parts and equipment. (http://www.parts-express.com) Good Luck John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- Brian Sherrod, PA My website: http://w5ami.net Arkansas Amateur Community Forums - http://w5ami.net/forums wa...@arrl.net __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] SX-28A restoration project
Thanks for all the nice comments guys! I will keep posting photos as I go. I'm still waiting on a red laquer stick for the red lettering on the front panel. After that, I plan to clear coat it and get it back on the rig. Next will be the cabinet, which I had three cans of paint mixed to match the original color, but first I have to put a layer of wrinkle on it. 73 Brian / wa5am On 9/3/09, WA5AM ars.w5...@gmail.com wrote: Sorry, that link might be dynamic, so it changes depending on sort order, etc. Don't know. Try this link link. It displays all the albums, so just look for the SX-28 Restoration Album and click it. You should see a lot of thumbnails of it. Click the thumbnails for a larger version, click the larger one for an even larger version... http://w5ami.net/cpg1419/index.php Sorry for the bad link. Brian __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
Thanks John. They appear to have one that will work very well, and the price on their speakers is darn good! 73 Brian On 9/4/09, John Coleman j...@pctechref.com wrote: Brian I buy most speakers from Parts Express. They have a lot of audio parts and equipment. (http://www.parts-express.com) Good Luck John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- Brian Sherrod, PA My website: http://w5ami.net Arkansas Amateur Community Forums - http://w5ami.net/forums wa...@arrl.net __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
I'm curious Brian, what is the one that you intend to get? John, WA5BXO -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of WA5AM Sent: Friday, September 04, 2009 4:42 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Hallicrafters R-12 speaker Thanks John. They appear to have one that will work very well, and the price on their speakers is darn good! 73 Brian On 9/4/09, John Coleman j...@pctechref.com wrote: Brian I buy most speakers from Parts Express. They have a lot of audio parts and equipment. (http://www.parts-express.com) Good Luck John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- Brian Sherrod, PA My website: http://w5ami.net Arkansas Amateur Community Forums - http://w5ami.net/forums wa...@arrl.net __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[AMRadio] Hallicrafters PM 23
I have a Hallicrafters PM 23 speaker that matches my SX 28A but it needs rust removal and refinishing. I would appreciate pictures and methods used to re-finish my PM 23 if anyone has specific information based on experience. I know that W8UT has worked on the PM 23 and I have communicated with him on that point. Does anyone have a silkscreen to re print the Green Hallicrafters printing on the face of the PM 23? Your assistance will be greatly appreciated and you may email me direct. Thanks and 73, John, K5PGW __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters PM 23
John, I haven't seen any print or decal on a PM-23. The R-42, yes. The several pictures found on the web do not show any either. http://www.hug-a-bug.com/PM-23.html http://www.antiqueradio.org/art/halli1266.jpg (Click on pic to enlarge.) John King wrote: I have a Hallicrafters PM 23 speaker that matches my SX 28A but it needs rust removal and refinishing. I would appreciate pictures and methods used to re-finish my PM 23 if anyone has specific information based on experience. I know that W8UT has worked on the PM 23 and I have communicated with him on that point. Does anyone have a silkscreen to re print the Green Hallicrafters printing on the face of the PM 23? Your assistance will be greatly appreciated and you may email me direct. Thanks and 73, John, K5PGW __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[AMRadio] Correction of my post
CORRECTION... I have both the PM 23 and R42 that need refinishing. I got them mixed up and it is the R 42 that will need re-lettering on the front in the Hallicrafters green lettering. I noticed my error just before I received Bob Bethman's email . Thanks Bob. 73, John, K5PGW __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
Well, a Jensen P12R isn't much different in price. The originals I do believe were made by Jensen. Bob - N0DGN Bob Peters wrote: WOW That is way overkill for Ham Radio ...Bob This one here: http://www.parts-express.com/pe/pshowdetl.cfm?DID =7Partnumber=290-834ctab=2#Tabs 73 Brian -- +--+ | AM Amateur Radio OperatorNØDGN | +--+ | Bob Bethman\\\|/// The absence of a danger | | \\ ~ ~ // signal does *NOT* mean | | rbeth...@comcast.net (/ @ @ /) that everything is OK | +--o00o---°(_)°---o00o-+ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
In speaker system design, there are optimum combinations of driver and enclosure. This may or may not be the optimum driver for this enclosure. There are complex driver parameters that can allow an analysis to determine the optimum enclosure characteristics. The basic issue is the acoustic match at the bottom end - does it boom, is it going to be thin sounding, what will the frequency response extend, etc. Of course there is also the power handling issue. Before spending a lot of money for the driver, I recommend that these issues be considered. Bacon, WA3WDR Sent from my Verizon Wireless BlackBerry __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
I could say a Gates is too :). But I won't. Imagine what you will sound like on the SX 28 and that speaker in a plywood box. 73 Jim/W5JO - Original Message - WOW That is way overkill for Ham Radio ...Bob -Original Message- This one here: http://www.parts-express.com/pe/pshowdetl.cfm?DID =7Partnumber=290-834ctab=2#Tabs 73 Brian __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
Ya sure Jim...He is not putting it in a plywood box...He is doing it right and going in a hardwood box...I know I will sound good on any speaker even a $2.00 Radio Shack LO Bob W1PE -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of Jim Wilhite Sent: Friday, September 04, 2009 6:27 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Hallicrafters R-12 speaker I could say a Gates is too :). But I won't. Imagine what you will sound like on the SX 28 and that speaker in a plywood box. 73 Jim/W5JO - Original Message - WOW That is way overkill for Ham Radio ...Bob -Original Message- This one here: http://www.parts-express.com/pe/pshowdetl.cfm?DID =7Partnumber=290-834ctab=2#Tabs 73 Brian __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amra...@mailman.qth.ne t/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
You are correct... They used Jensen and Quam but only used 10 oz magnets...The magnet size is what determines sound quality on a speaker... My company manufactures both 5 and 10 oz but only up to 8 ...Now you make that speaker a coaxial and it will improve the quality by 50% or more...Speakers are just like radio's... The better the enclosure the better the speaker like a transmitter and an antenna... More later on enclosure design/// Bob W1PE -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of rbethman Sent: Friday, September 04, 2009 6:21 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Hallicrafters R-12 speaker Well, a Jensen P12R isn't much different in price. The originals I do believe were made by Jensen. Bob - N0DGN Bob Peters wrote: WOW That is way overkill for Ham Radio ...Bob This one here: http://www.parts-express.com/pe/pshowdetl.cfm?DID =7Partnumber=290-834ctab=2#Tabs 73 Brian -- +- -+ | AM Amateur Radio OperatorNØDGN | +- -+ | Bob Bethman\\\|/// The absence of a danger | | \\ ~ ~ // signal does *NOT* mean | | rbeth...@comcast.net (/ @ @ /) that everything is OK | +--o00o---°(_)°---o00o -+ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amra...@mailman.qth.ne t/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
The Jensen P12R uses a 7 oz. alnico. It is rated at 25 Watts. Certainly more than the radio will do by itself. My experience is that alnico magnets are more powerful per ounce than old-fashioned ones. That is why they use alnico and sometimes rare-earth materials in the head assembly of computer hard drives. It is one of the reasons for the reduction in size of drives. Bob - N0DGN Bob Peters wrote: You are correct... They used Jensen and Quam but only used 10 oz magnets...The magnet size is what determines sound quality on a speaker... My company manufactures both 5 and 10 oz but only up to 8 ...Now you make that speaker a coaxial and it will improve the quality by 50% or more...Speakers are just like radio's... The better the enclosure the better the speaker like a transmitter and an antenna... More later on enclosure design/// Bob W1PE -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of rbethman Sent: Friday, September 04, 2009 6:21 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Hallicrafters R-12 speaker Well, a Jensen P12R isn't much different in price. The originals I do believe were made by Jensen. Bob - N0DGN -- +--+ | AM Amateur Radio OperatorNØDGN | +--+ | Bob Bethman\\\|/// The absence of a danger | | \\ ~ ~ // signal does *NOT* mean | | rbeth...@comcast.net (/ @ @ /) that everything is OK | +--o00o---°(_)°---o00o-+ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Hallicrafters R-12 speaker
That makes it just about right Our 10 oz are rated at 40 watts...We use them in a 70V config with a max of 15 watts...With a good can they sound great...Speakers with no backing are CRAP... That is why enclosure is so important...My Shack speaker is an original 15 inch Jensen with a 20 lb magnet. It was the first coax speaker Jensen made... It is in a blonde Jensen box that has 2 inches of sound deadning material and is bass ported in the rear. This make SW BROADCAST sound like a dream... Bob W1PE -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of rbethman Sent: Friday, September 04, 2009 8:27 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Hallicrafters R-12 speaker The Jensen P12R uses a 7 oz. alnico. It is rated at 25 Watts. Certainly more than the radio will do by itself. My experience is that alnico magnets are more powerful per ounce than old-fashioned ones. That is why they use alnico and sometimes rare-earth materials in the head assembly of computer hard drives. It is one of the reasons for the reduction in size of drives. Bob - N0DGN Bob Peters wrote: You are correct... They used Jensen and Quam but only used 10 oz magnets...The magnet size is what determines sound quality on a speaker... My company manufactures both 5 and 10 oz but only up to 8 ...Now you make that speaker a coaxial and it will improve the quality by 50% or more...Speakers are just like radio's... The better the enclosure the better the speaker like a transmitter and an antenna... More later on enclosure design/// Bob W1PE -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of rbethman Sent: Friday, September 04, 2009 6:21 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Hallicrafters R-12 speaker Well, a Jensen P12R isn't much different in price. The originals I do believe were made by Jensen. Bob - N0DGN -- +- -+ | AM Amateur Radio OperatorNØDGN | +- -+ | Bob Bethman\\\|/// The absence of a danger | | \\ ~ ~ // signal does *NOT* mean | | rbeth...@comcast.net (/ @ @ /) that everything is OK | +--o00o---°(_)°---o00o -+ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amra...@mailman.qth.ne t/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
