Magnacord 1024 Tape Recorder© Brooke Clarke 2000 - 2007
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 specifications are:
Tape Speed: 3 3/4 or 7 1/2 inches per second
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, Hi-Fwd.
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
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 ips
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 becasue of the distance between the
record and play heads.
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
Back to Brooke's Personal home, PRC68, Military Information, Electronics
"Magnacord Presents the incomparable Model . . . 1020 . . . 1024" sales
brochure with specifications.
My frequency response plots made using: Scotch 105, 111, 203 Shamrock 031,
If I can find it you will get the original owners manual.