Atwater Kent Modern Drawings Index

20 Nov 2013 - All drawings are being updated for consistent style, and adding new information.
01 Mar 2004 - Added battery connection diagrams to all battery set schematics.

I am redrawing many of the vintage Atwater Kent schematics. The new versions will include voltages, parts numbers and values.

In keeping with the convention adopted in our magazine articles, I will only use
radio model numbers that were actually assigned by the factory.

Such is not the case for many early breadboards, which carry the notation (our model #), indicating that
a model number has been adopted in the modern literature which was not issued by the factory.

I am also creating original drawings of some components, which will facilitate
creation of modern replacements if vintage parts are not available.

This is an ongoing project, so check back often, and request anything you need that's not already here.

Schematics, listed by catalog number or model number

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Model and Set Number File date PDF file Comments
COMPONENTS (ordered by catalog number)
3634 2-stage Amplifier 13 Dec 2006 AK03634sch.pdf
3676 Detector 1-stage Amplifier 23 Apr 2007 AK03676sch.pdf
3812 Detector 2-stage Amplifier 19 Dec 2006 AK03812sch.pdf
3849 4-ohm Rheostat (mechanical drawing) 29 Mar 2005 AK03849.pdf
3902 Detector 19 Dec 2006 AK03902sch.pdf
4030 1-stage Amplifier 13 Dec 2006 AK04030sch.pdf
4135 Detector 2-stage Amplifier 17 Feb 2008 AK04135sch.pdf later version of the 3812
4332 Detector 19 Dec 2006 AK03902sch.pdf
4520 Detector 2-stage Amplifier 12 Sep 2005 AK04520sch.pdf used only on Models 9C and 10C
4925 2-stage Amplifier 13 Dec 2006 AK04925sch.pdf used only on Model 12C
4940 Detector 1-stage Amplifier 07 May 2007 AK04940sch.pdf used only on Model 12C
OPEN SETS (ordered by catalog number)
3925 (our model 1) 25 Apr 2004 AK03925sch.pdf
3945 (our model 2) 25 Apr 2004 AK03945sch.pdf
3955 (our model 3) 14 Nov 2013 AK03955sch.pdf
3960 (variant of the 3955) 14 Nov 2013 AK03955sch.pdf Added to 3955 print
3975 (our model 4) 25 Apr 2004 AK03975sch.pdf
4052 (our model 6) 28 Jun 2004 AK04052sch.pdf
4066 (our model 7) - pending - tba uses 1-amp tubes
4120 (no modern model number, quite rare) - pending - tba
4205 (our model 7, later version) - pending - tba uses 1/4-amp tubes
4275 (our model 6, later version) - pending - tba
OPEN SETS (ordered by factory-assigned model number)

Model XV 4220 (cabinet version of 4066) - pending - tba the only Roman Numeral model
Model 5 4333 03 Jul 2009 AK04333sch.pdf
Model 8 4325 (- no data currently available -) - placeholder -
Model 9 4445 27 Nov 2013 AK04445sch.pdf variometer tuned
Model 9A 4445A 27 Nov 2013 AK04445Asch.pdf variometer tuned
Model 9 4660 (our model 9C) 27 Nov 2013 AK04660sch.pdf condenser tuned
Model 10 4340 (both Radiodyne and non-Radiodyne versions) 12 Nov 2013 AK04340sch.pdf
Model 10 4700 (our model 10C) 09 May 2007 AK04700sch.pdf came out after the 10A & 10B
Model 10A 4550 (brown) and 4560 (black) 15 Apr 2007 AK04550sch.pdf
Model 10B 4550 (brown) and 4560 (black) 15 Feb 2011 AK04552sch.pdf
Model 12 4375 Radiodyne <<< fictitious model >>> see note at the bottom of this page
Model 12B 4620 !!! The only known schematic for this radio 04 Dec 2013 AK04620sch.pdf
Model 12C 4910 20 Dec 2013 AK04910sch.pdf
RADIO SETS (ordered by factory-assigned model number)

Model 19 4880 1 Mar 2004 AK04880sch.pdf
Model 20 4640 1 Mar 2004 AK04640sch.pdf
Model 20C 7570 1 Mar 2004 AK07570sch.pdf
Model 20C 7960 1 Mar 2004 AK07960sch.pdf
Model 21 7780 1 Mar 2004 AK07780sch.pdf
Model 24 4920 1 Mar 2004 AK04640sch.pdf Model 20 4640 in fancy cabinet
Model 30 7950 !!! 31 Aug 2005 AK07950sch.pdf
Model 30 8000 30 Mar 2004 AK08000sch.pdf
Model 32 8270 31 May 2009 AK08270sch.pdf
Model 33 8930 07 Feb 2013 AK08930sch.pdf
Model 35 8100 07 Feb 2013 AK08100sch.pdf
Model 37 9500 (chassis & PU) 24 Jan 2005 AK09500sch.pdf All versions 9500 9700 9800
Model 40 9800 (chassis & PU) 30 Mar 2004 AK09800sch.pdf
Model 42 9850 (chassis & PU) 30 Mar 2004 AK09800sch.pdf
Model 43 9870 (chassis & PU) 30 Nov 2010 AK09870sch.pdf
Model 44 9900 (chassis & PU) 23 Mar 2007 AK09900sch.pdf
Model 45 9880 (chassis & PU) 23 Mar 2007 AK09900sch.pdf
Model 46 14100 (chassis & PU) 01 Dec 2010 AK14100sch.pdf
Model 47 14500 (chassis & PU) 03 Apr 2007 AK14500sch.pdf
Model 49 9860 07 Feb 2013 AK08930sch.pdf Model 33 with different cabinet
Model 52 9930 (chassis & PU) 30 Mar 2004 AK09800sch.pdf
Model 55 14900 & 55-C 14800, early and late versions (2-page PDF) 15 Feb 2007 AK14902sch.pdf
Model 56 13900 (chassis & PU) 30 Mar 2004 AK09800sch.pdf
Model 57 14000 (chassis & PU) 30 Mar 2004 AK09800sch.pdf
Model 60 15000 & 60-C 15100, early and late versions (2-page PDF) 15 Feb 2007 AK15003sch.pdf

Note regarding the 4375 Model 12 Radiodyne:
No such model was ever manufactured by the Atwater Kent company.
No reference has been found to such a set in any original AK literature or source.
This model was invented by one collector as an example of what such a set might look like.

Mechanical drawings, listed by description

  • Drive belts & pulleys - Models 30, 30-A, & 35
  • Part Number Index

    3849 4-ohm rheostat for TA
    7965 Belt
    8136 Belt
    8146 Belt
    9168 Pulley (single)
    9169 Pulley (double)