What's New @ AtwaterKent.Info


  • 2015 Jun 04 - Posted updated drawings for 9A 4445A & 9C 4660 & 10 4600 & 10C 4700 in PDF format.
  • 2015 May 27 - Updated schematic for Model 9A 4445A in PDF format.
  • 2015 May 26 - Added RCA 23K receiver schematic link on the Articles page.
  • 2014 Aug 19 - Rider page AK 6-47 added, inadvertently omitted.
  • 2013 Dec 20 - Updated schematic of Model 12 4910 in PDF format.
  • 2013 Dec 04 - Updated schematic of Model 12 4620 in PDF format.
  • 2013 Nov 27 - Final updated schematics of Models 9 4445, 9A 4445A, and 9C 4669 in PDF format.
  • 2013 Nov 21 - Updated schematic of Model 9 4445 in PDF format.
  • 2013 Nov 19 - Modern schematic of 4135 Detector 2-stage Amplifier in PDF format.
  • 2013 Nov 18 - Modern schematic of Models 37 9500 9700 9800 in PDF format.
  • 2013 Nov 18 - Modern schematic of Models 33 8930 and 49 9860 in PDF format.
  • 2013 Nov 17 - Added 3960 to 3955 print.
  • 2013 Nov 16 - Added last PDFs to the Modern Drawings section. No more GIFs there.
  • 2013 Nov 14 - Added high-resolution scans for some pages in Electrical Values in PNG format.
  • 2013 Nov 12 - Modern schematic of Model 10 4340 in PDF format.
  • 2013 Nov 11 - Modern schematic of Model 9 4445 in PDF format.
  • 2013 Nov 09 - Modern schematic of Model 9 4660 (our model 9C) in PDF format.
  • 2013 Nov 09 - Housekeeping in Modern Drawings and the Gallery.
  • 2013 Sep 29 - Moved to new hosting site. Content is unchanged, but will be enhanced.
  • 2013 Aug 03 - Added links to belt alignment info for TRFs on Service Data page.
  • 2013 Feb 07 - Modern schematic of Models 33 and 49 8930 in PDF format.
  • 2013 Feb 06 - Modern schematic of Model 35 8100 in PDF format.
  • 2013 Jan 28 - Modern schematic of Model 37 9500 in PDF format.
  • 2012 Dec 14 - Update schematics of Models 10A & 10B 4550 & 4560 in PDF format.
  • 2012 Dec 10 - Update schematic of Model 12C 4910 in PDF format.
  • 2012 Nov 10 - Minor edits and updates to the History page
  • 2012 Sep 10 - Added RCA 23K article chapter 2 to the articles page
  • 2011 Feb 19 - Update schematic of Model 10 4700 (our model 10C) in PDF format.
  • 2011 Feb 15 - Modern schematic of Model 10B 4550 (brown) & 4560 (black) in PDF format.
  • 2010 Dec 01 - Modern schematic of Model 46 14100 in PDF format.
  • 2010 Nov 23 - Modern schematic of Model 43 9870 in PDF format.
  • 2009 Jul 03 - Modern schematic of Model 5 4333 in PDF format.
  • 2009 May 31 - Modern schematic of Model 32 8270.
  • 2007 Aug 23 - Chapter 6B of Radio Age AK article (6 is so big we divided it into four parts).
  • 2007 Aug 23 - Modern schematic of 4940 Detector / Amplifier used on the Model 12C (for the AK article in RA).
  • 2007 Aug 23 - Updated schematic of 3676 Detector / Amplifier (for the AK article in RA).
  • 2007 May 09 - Modern schematic of Model 10C 4700 (AK called this the model 10).
  • 2007 Mar 23 - Modern schematic of 4520 Detector 2-stage Amplifier.
  • 2007 Mar 23 - Updated drawings for Models 44 and 45 to correct 3R grid resistor value.
  • 2007 Feb 24 - Chapter 6A of Radio Age AK article (6 is so big we divided it into four parts).
  • 2007 Feb 15 - Updated drawings for Models 55 and 60 to show speaker socket.
  • 2006 Feb 20 - Fifth chapter of Radio Age AK article.
  • 2005 Dec 22 - Modern schematics of Models 10A & 10B 4550 & 4560.
  • 2005 Dec 15 - Fourth chapter of Radio Age AK article.
  • 2005 Oct 28 - Third chapter of Radio Age AK article.
  • 2005 Sep 24 - Added Military OQ-3 Tube Tester manual in PDF form to the Requests page.
  • 2005 Aug 22 - Second chapter of Radio Age AK article.
  • 2005 Aug 16 - Corrections and updates to the History page.
  • 2005 May 18 - First of a new series of articles on AK radios, by Ray Thompson and yours truly, on the Articles page.
  • 2005 Apr 27 - Restored McMurdo-Silver 906 manual on the Requests page.
  • 2005 Apr 27 - Gallery - changed he sort order of the sets to the catalog number rather than model number. This puts them in better chronological order.
  • 2005 Apr 27 - History page... minor changes.
  • 2005 Mar 31 - Updated the History page with a couple of new photos.
  • 2005 Mar 31 - Added modern drawing of p/n 3849 4-ohm rheostat used in the 4052 TA and possibly others
  • 2005 Mar 30 - Updated History page with a couple of photos of AK's houses.
  • 2004 Aug 04 - Added pictures of the Model 6 4052 open set to the Gallery.
  • 2004 Jun 23 - Removed Models 15 and 22 from the main index since it appears these are not valid model numbers.
  • 2004 Jun 22 - Added pictures of the type 607 tube to the Gallery.
  • 2004 Jun 21 - SM Mar 1936 Models 237Q, 285Q, 415Q, 467Q, 485Q, 515Q, 657Q, 747Q, D Antenna, and DT Antenna Transformer.
  • 2004 Jun 11 - Modern schematic of the Model 4 3975 open set.
  • 2004 Jun 07 - Modern schematics of the 3634 2-Stage Amplifier and the Model 3 3955 open set.
  • 2004 May 31 - Restored LR8 HV regulator schematic on Requests page.
  • 2004 May 28 - Added Instruction Sheets for the 3731 Variocoupler and the 3812 Detector 2-stage AF Amplifier in Service Manuals.
  • 2004 May 19 - Added pictures of the Model K Speaker to the Gallery.
  • 2004 May 15 - Modern schematic of Model 21 7780.
  • 2004 May 09 - Tentative SD Jul 1935 Models 317, 337, 435, 649, 856, and 976.
  • 2004 May 07 - SM Jul 1935 Models 286, 356, 385Q, 475, 625Q, and 735.
  • 2004 May 06 - Added pictures of two Model 2 3945s to the Gallery.
  • 2004 Apr 27 - Vectored the Grebe link to the new site https://www.Synchrophase.Info.
  • 2004 Apr 25 - Modern schematics of the 3676 Detector 1-Stage Amplifier, the Model 1 3925 and Model 2 3945.
  • 2004 Apr 23 - Modern schematic of the 3812 Detector 2-Stage Amplifier.
  • 2004 Apr 17 - Modern schematic of the 3902 Detector; first in a series on the Open Sets and components.
  • 2004 Apr 16 - All of Rider's Volume 3 AK material on line. These are new scans, done by me, not the lousy Rider's you're accustomed to. (184 pages).
  • 2004 Apr 15 - Added pictures of a Model 9A 4445A and a Model 10A 4550 to the Gallery.
  • 2004 Apr 08 - Updated indices - Models 447 & 577 use same schematic as 318.
  • 2004 Apr 06 - All of Rider's Volume 6 AK material on line. These are new scans, done by me, not the lousy Rider's you're accustomed to. From a brand new Volume 6. (46 pages).
  • 2004 Apr 05 - SM May 1934 Models 165, 185, 217, 217D, 275, 310, 387, 425, 427, 427D, 427Q, 510, 525, 525Q, 534, 665, 666, 667, 667D, 711, 788, 808A, 816, 926, and 936.
  • 2004 Mar 31 - Added two sets of Model 10A 4560 pictures, one set of each type, to the Gallery.
  • 2004 Mar 30 - Important - Revised modern schematics for Models 40, 42, 44, 45, 52, 56 & 57 to correct the resistance of the filter chokes.
  • 2004 Mar 19 - Added pictures of Model 10B 4550 to the Gallery.
  • 2004 Mar 09 - Removed the Model 2 3945 from the Gallery due to questions re authenticity.
  • 2004 Mar 07 - First version of the Grebe gallery.
  • 2004 Mar 06 - Updated history page.
  • 2004 Mar 05 - Added pictures of a Model 2 3945 and a Model 10 4600 to the Gallery.
  • 2004 Mar 01 - Added battery connection diagrams to modern schematics of all battery sets.
  • 2004 Feb 27 - Added European schematics of Models 286, 305Z, 356, 475, 545, 565Z, 649 (1st type), 735, and 810, contributed by Antonio Santos of Portugal.
  • 2004 Feb 26 - All of Rider's Volume 7 AK material on line. These are new scans, done by me, not the lousy Rider's you're accustomed to. From a brand new Volume 7. (66 pages).
  • 2004 Feb 23 - Modern schematic for Model 47 14500. AK did not publish a schematic of this set, but referenced it in footnotes.
  • 2004 Feb 22 - Ten pictures of a lovely unrestored Model 9 4445 (not the 9C) added to the Gallery.
  • 2004 Feb 22 - Six pictures of a very nice Radiodyne 4340 added to the Gallery.
  • 2004 Feb 04 - New navigation method for Modern schematics page, brings up a schematic in an html page. Should solve the problem of some browsers not displaying the files correctly.
  • 2004 Feb 02 - Modern schematic for Model 30 7950. I believe this is the first schematic ever published for this radio!.
  • 2004 Feb 02 - Modern schematic for Model 30 8000.
  • 2004 Jan 31 - Added Amperite Ballast Tube App Note on the Requests page.
  • 2004 Jan 25 - Housekeeping - removed the Atwater Kent logo from all pages other than Home.
  • 2004 Jan 20 - Seven pictures of a Model 7 4066 with the original instruction book added to the Gallery.
  • 2004 Jan 19 - Six pictures of a Model 30 8000 in a Pooley cabinet added to the Gallery.
  • 2004 Jan 12 - Four pictures of the Model 9C 4660 from Phil Steffora added to the Gallery.
  • 2004 Jan 10 - Updated schematics for Models 40/42/52/56/57 and 44/45.
  • 2004 Jan 07 - Modern schematics for Models 40/42/52/56/57 (revised) and 44/45 added.
  • 2004 Jan 07 - Eight pictures of the Model 12C 4910 from Phil Steffora added to the Gallery.
  • 2004 Jan 02 - Modern schematic for Models 40, 42, 52, 56, and 57 (includes Power Unit).
  • 2003 Dec 22 - Added a new Requests page - This is where you'll find items you've asked for.
  • 2003 Dec 21 - SM Mar 1935 Models 465Q, 655Q, 768Q, and 978Q (complete, 8 pages).
  • 2003 Dec 21 - Added 3 missing pages from SM Jan 1935.
  • 2003 Dec 20 - Added MU-1 pix to the Grebe page.
  • 2003 Dec 20 - SM Jan 1935 Models 206 (2nd type), 318, 376 (2nd type), and 854 (16 pages, 3 missing due to scanner error).
  • 2003 Dec 14 - Updated modern schematics for Model 55 (early & late) - changed bypass cap callouts to agree w/AK literature & corrected det bias resistor value.
  • 2003 Dec 14 - Updated modern schematics for Grebe MU-1 (all versions) - added tube designations.
  • 2003 Dec 13 - Added Galleon logo to option frame.
  • 2003 Dec 11 - Modern schematics for Model 60 15000 and Model 60C 15100, early and late types (preliminary).
  • 2003 Dec 07 - Added Grebe section with modern schematics - yeah, I know it's an Atwater Kent site, but I like Grebe, too ;-).
  • 2003 Dec 07 - Updated modern schematics & schematic Index page.
  • 2003 Dec 06 - Sales Lit section - added pic of Model 35 and E speaker in Norman Rockwell's studio.
  • 2003 Dec 06 - New Antennas section - diagrams of indoor & outdoor antennas.
  • 2003 Dec 06 - SM Mar 1934 Models 165-Q, 425, 525-Q, 665, 816, 926, and 936 (complete, 4 pages).
  • 2003 Dec 06 - SM Jul 1933 models 155 (3rd type), 165, 424, and 555 (2nd type) (complete, 8 pages).
  • 2003 Dec 06 - SM Apr 1933 Models 155 (2nd type), 636, 756, and 756-B (complete, 8 pages).
  • 2003 Dec 06 - SM Mar 1933 Models 155 (1st type), 246 (2nd type), 266, 448, and 555 (complete, 8 pages).
  • 2003 Dec 06 - SM Jan 1933 Model 246 (complete, 4 pages).
  • 2003 Dec 06 - SM Apr 1932 Models 81, 81-B, 81-C, 82-D, 82-Q, 85-Q, 86, 87, 89, 90, 90-F, 92, 92-F, 93, 94, 94-F, 96, 96-F, 99, 99-F, and 99-P (complete, 48 pages).
  • 2003 Dec 04 - Updated modern schematics for Model 55 & 55C, including some new part numbers.
  • 2003 Dec 01 - Modern schematics for Model 55 14900 and Model 55C 14800, early and late types.
  • 2003 Nov 29 - SM Jan 1933 Models 188 (2nd type), 260 (3rd type), 469 (2nd type), 469-D, 469-Q, 480, 588, 588-D, 588-Q, 612, 627, and 812 (complete, 32 pages).
  • 2003 Nov 16 - SM Jun 1931 Models 41, 43, 46, 47, 50, 53, 55, 55-F, 60, 61, 66, & 67 (last 55 pages).
  • 2003 Nov 13 - A restoration article from Norm Leal (thanks, Norm!).
  • 2003 Nov 13 - SM Aug 1928 most remaining pages; cleaned up some pages (37 pages).
  • 2003 Nov 12 - New Articles section - first contribution is power supply rebuilding article by Ken Owens (thanks, Ken!).
  • 2003 Nov 12 - SM Jan 1931 Model 72 - AK's first superhet (complete, 24 pages).
  • 2003 Nov 11 - SM Dec 1930 Models 70-Q, 74-D, 75-P, 76-Q and Speakers complete (last 20 pages).
  • 2003 Nov 10 - SM Nov 1931 Models 80-87 (except 87-D) and 89 complete (40 pages).
  • 2003 Nov 09 - SM Aug 1928 Models 30, 32, 33, 35, 36, 37, 38, 40, 42, 43, 44, 46, 47, 48, 50 and Y PU. SM Dec 1931 Model 87-D.
  • 2003 Nov 08 - SM Sep 1934 Models 145, 206, 325, 376, 559, 825, and 944 with some info for Models 112, 318, and 447.
  • 2003 Nov 07 - SM Jun 1931 Models 10, 10B, 12, 20(all), 21, 30, 32, 35, 36, 37, 38, 40, 42, 44, 45, 46, 47, 48, 49, 50, 52, 56, 67, & PUs R, S, and Y. Also generic voltage table (page 45) for AC sets except screen grid.
  • 2003 Nov 06 - SM Dec 1930 Models in 7x-series (first half of book, 20 pages).
  • 2003 Nov 05 - Modern schematic for Model 12 4910.
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