EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Mark Schroeder
  • Male
  • Peoria, AZ
  • United States
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Mark Schroeder's Discussions

Speaker technologies

Started this discussion. Last reply by David C. Poland on Tuesday. 16 Replies

Looking for technical info all about speaker technologies from the 20’s through the 50’s. Looking for that “rare” detail about dynamic vs non-dynamic, power handling, load, inductance, etc? Can…Continue

Tags: speakers, Jensen, speaker, Electrodynamic

 

Mark Schroeder's Page

Latest Activity

David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"Here are the intended photos for the AW-12. (sorry for dups - in a hurry to go to dinner) 2nd photo of twin ROLA speakers: IMG_0198.JPG and 12 inch Jensen pedestal:  Allwave%2012%20-speaker%20rear%20view.jpg "
Tuesday
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"The AW-23 uses a special 12 inch Scott branded Magnavox field coil pedestal speaker - and an optional pair of Jensen Q series tweeters to extend the audio frequency range. The pedestal speaker has two 5 pin sockets on the base. There are 2 versions…"
Tuesday
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"Mark - re speakers: The AW-12 Wunderlich model was upgraded December 1932 with 58's in the IF amp  and the new Wunderluch tube 2nd detector adding AVC - but continued the pair of Scott badged ROLA field coil speakers (7.5 inch and 9 inch).…"
Monday
Mark Schroeder replied to Mark Schroeder's discussion Speaker technologies
"By the way, just to add, your archives of information that you all have collected are amazing! I was a little concerned digging into this project once I got the radio, but now have a huge amount downloaded that provides excellent details about the…"
Monday
Mark Schroeder replied to Mark Schroeder's discussion Speaker technologies
"Excellent recommendation. Just ordered one. Had seen these but the 450 was the high mark to get over. This is probably the only “battery” set I ever want to tackle. Looking forward to making it sing, while we still have AM stations…"
Monday
Kent King replied to Mark Schroeder's discussion Speaker technologies
"Mark - You really don't need the 450v supply for the Super 10. I run mine on a supply that provides up to 135v, and it works very nicely. You may not need to bias the grid on the 10 quite as much with a lower plate voltage. An RCA tube manual…"
Monday
Mark Schroeder replied to Mark Schroeder's discussion Speaker technologies
"Greatly appreciate all the comments and details. Just had a Radiola 100A delivered and hoping its working. Other radios that I have that are missing original speakers are an Allwave 12 deluxe (with Wunderlich) and a Imperial 23 (always looking for a…"
Sunday
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"For The Scott models of the 1930's, if you need to know what speaker is correct for any model, we can advise you, and provide a photo as well if you need a better photo than we included in the Scott Collector's Guide, 2nd edition. For your…"
Aug 5
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"Aaaah yes!!.  The World's Record Super 10  - meaning the battery set of 1927-8, a kit set ??.  The era of the classic cone speaker, a high impedance magnetic speaker using a horse shoe magnet. Until Scott brought out the 1929…"
Aug 5
Kent King replied to Mark Schroeder's discussion Speaker technologies
"Mark - Well, the 100A speaker will work well with the Super 10 and the type 10 output tube (10/210/310 are all the same). In fact, this is the high impedance speaker type Dave refers to (cone speakers). These speakers are generally not terribly…"
Aug 5
Mark Schroeder replied to Mark Schroeder's discussion Speaker technologies
Aug 5
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"East E H Scott radio was shipped with the correct speaker(s).  E H Scott Radio is not to be confused with the H H Scott component HI Fi products of the late 1940's, 1950's and 1960's "
Aug 4
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"There is a wealth of information on the various E H Scott models on the archive section at the top of this page. For almost every Scott model, the speaker is unique to that model owing to the tubes and circuit requirements. The Jensen and Magnavox…"
Aug 4
David C. Poland replied to Mark Schroeder's discussion Speaker technologies
"You are on an antique radio site,  mostly pre-WW2 era or shortly after WW2. The standardization to 4, 8 and 16 ohm speakers with permanent magnets is pretty much a post war development. Prewar radio design engineers included the specs for the…"
Aug 4
Mark Schroeder replied to Mark Schroeder's discussion Speaker technologies
"Thanks Norman. Do you have a link to any of the technical specs for the Jensen or Magnavox that you can share? Do you know if EH Scott ever recommended a specific model type from Jensen that they had designed the radios and optimized their designs…"
Aug 4
Norman S Braithwaite replied to Mark Schroeder's discussion Speaker technologies
"EH Scott Radio Laboratories never made speakers.  Specifications of Jensen speakers appropriate for the time frame were published by Jensen and in electronic products catalogs which can be found on line.  I have not seen specifications…"
Aug 4

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