E. H. Scott "Allwave 15"
1934
E. H. Scott Radio Laboratories, Inc.,
4450 Ravenswood Ave.,
Chicago, Illinois, USA
The
Scott Allwave 15 was introduced in 1934 and was designed to replace the
earlier Scott Allwave 12. The added features that the 15 had over
the 12 was the addition of a tuning meter driver tube, BFO, and push
pull audio driver stage. The audio's output was increased by
replacing using a pair of 2A3 in place of 45 tubes. There were
two versions of the Allwave 15, an early version which had a 55 2nd
detector tube set up as a half wave detector and a late version which
had the 55 2nd detector tube set up as a full wave detector. I
acquired this set, in 1989 from Norman Braithwait , through a trade
with a Scott Worlds Record Shield Grid AC 10.
Tube Line Up: Tuner
58...R.F. Amplifier
2A7...1st. Detector / Mixer
56...Oscillator
58...1st. I.F. Amplifier
58...2nd. I.F. Amplifier
58...3rd. I.F. Amplifier
55...2nd. Detector / AVC
56...Tuning Meter Driver
56...Beat Oscillator
56...1st. Audio Stage
56 x 2...2nd. Push Pull Audio Stage
Tube Line Up: Amplifier / Power Supply
2A3 x 2...Push Pull Audio Output
5Z3...Rectifier
Frequency Ranges:
BC Band (White Band)...540 kHz - 1500 kHz
SW-1 Band (Green Band)...1.5 MHz - 4 MHz
SW-2 Band (Red Band)...4 MHz - 10 MHz
SW-3 Band (Purple Band)...10 MHz - 23 MHz
I.F. Frequency...465 kHz
The schematic for this radio can be found in the Rider manual Vol. XV,
Scott Trans. pages 23 to 29. You can also view the schematics and
information, of this radio, at the Nostalgia Air web site by clicking
on the links below.
Click here to view, by means of TerraServer, the location of the factory site as it looks today.
Schematics and Information
This
fold out sales flier measures 5.25 x 3.25 inches. It's one of the more
common Scott sales fliers to be found today and regularly pops up on
ebay.
The Manufacture of an E. H. Scott All Wave 15 Receiver Pt. 1
The Manufacture of an E. H. Scott All Wave 15 Receiver Pt. 2
This Video
was created from an original 16mm silent film taken by E. H. Scott
himself in 1933 or 1934 at the Scott facility at 4450 Ravinswood,
Chicago. The original 16mm film was obtained by Jack Rhodes of
Victoria, British Columbia, Canada from the original Scott
estate. In 1992 this film was acquired by Jim Clark. It is
reproduced here under rights granted by Jim Clark for the benefit of
all those that might view and enjoy this historical footage.