Magnacord 1024 Tape Recorder
© Brooke Clarke 2000 - 2022
- The upper unit is the mechanical tape deck, it contains no
electronics. It is based on a die cast main plate. It has
a two speed hysteresis drive motor and two permanent
split-capacitor reel drive motors. Some of the key
- Tape Speed: 3 3/4 or 7 1/2 inches per second (Professional
audio tape recorders could run at 15 inches per second and
that may have been an option, i.e. either 7.5 or 13 ips).
- Flutter and Wow: 0.25% at 3 3/4 ips; 0.18% at 71/2 ips
- Timing Accuracy +/- 0.2%
- Reel Size: 5, 7, 8 1/4" E.I.A. hubs (the rubber push on
reel holders are included, hard to see in the photo)
- Rewind Time: 1,200 feet in 80 seconds
- The row of control buttons are (left to right): Rewind,
Record, Safety (must be pressed with Record), Stop, Cue, Play,
The Cue function has the tape loaded but not driven to allow
manual positioning of the tape. You can use the marks on
the top cover or remove the cover to get more exact. This
can be used for cutting and taping the tape for editing or just
for cueing the next selection.
- There is an empty plug that could be used for remote
control of the mechanics.
- The lower unit has the transistor electronics in the form of
slide in printed circuit cards.
- The dual VU meters can be set to monitor: bias (left
meter above), source, or tape
- Frequency Response 35 to 10,000 cps +2, -3 dB @ 3 3/4 ips,
45 to 18,000 cps @ 7 1/2 ips
- Signal to Noise Ratio: 48 dB at 3 3/4 ips; 51 dB @ 7 1/2
- Selectable heads, 1/4 track erase, 1/4 track record, 1/4
track play (that is the order that they work)
- You can mix the 1/4" front panel Microphone input with the
rear panel RCA jacks. You can listen to the source or
the recorded sound. You can also feed the output from
one channel to the input of the next, but there will be a
slight time delay because of the distance between the record
and play heads.
The motors on the feed and takeup reels are constant
torque. For compliance there is a tape tension swing arm
between each reel and the capstan that drives the tape.
The capstan has a massive flywheel attached to lower the Flutter
The free standing tape recorders used with computers are
optimized for the highest possible speed of access. They
can not afford the mass of the tape tension swing arms and have
replaced both of them with a small elevator shaft like
compartment where the tape hangs. There's a control system
that drives the reels to maintain the loop in the elevator
Both Record and Playback electronics
each have adjustments to allow matching bias level and
equalization to the particular tape being used. I did it
using a single audio tone. Later read a paper suggesting
that multiple tones should be used to come closer to simulating
real inputs. The idea is that the input signals act like a
bias oscillator for other input signals.
Manuals and documents
Analog Reel To Reel Tape Recorder OnLine Museum - now the home
of this recorder
- "Magnacord Presents the incomparable Model . . . 1020 . . .
1024" sales brochure with specifications.
- My frequency response plots made using: Scotch 105, 111, 203
Shamrock 031, Kodak 31A12
- If I can find it you will get the original owners manual.
2245286 Electromagnetic sound recording, Marzocchi
Luigi, Priority: Jun 26, 1936, Pub: Jun 10, 1941, 360/84,
369/97, 360/83, 346/139.00A, 360/122 - scanned mag tape
by 91 patents
Magnetic transducing apparatus
utilizing a helical sound trace, William
E Bradiey, Philco
Corp, Filed: Dec 19, 1944, Pub: Feb 8,
1949, 360/29 - wire recorder. They
had problems with wire rotation.
Wire and tape driving means, Russell
J Tinkham, Magnecord,
1950-03-07, - without using sprocket holes - capstan drive shaft
(13) is hard, pinch rollers (14 & 15) are soft.
2499700 Magnetic recording and reproducing
J Tinkham, Robert
L Landon, Magnecord,
1950-03-07, - endless tape in box
Plural track magnetic recording and/or reproducing apparatus, James
H Greenwood, Magnecord,
1955-01-04, - 6 tracks - "One application of the invention is in the
field of recording television (video) signals for subsequent
reproduction. Another application of the invention is in the field
of recording military and communication signal currents of a
frequency both within the standard video band as well as of
frequencies above that band which are considered as falling within
the video frequency range."
Electric motor, William
L Dunn, Magnecord,
1957-06-18, - "... single-phase alternating-current
machine that can be used as a synchronous motor, a variable
speed motor, or a variable speed motor synchronized by
external Synchronizing pulses." i.e. a stepper motor
2956114 Broad band magnetic tape system and method, Charles
E Anderson, Ray
M Dolby, Charles
P Ginsburg, Jr
Shelby F Henderson, Ampex,
Oct 11, 1960, 360/30,
386/E05.9, 386/335 - helical scan video
\ Poulsen Telegraphone
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