1969 Chilton 100S
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Frustrated with modifying 'other-brand' tape recorder mechanisms (eg Collaro) for his high-quality REPS series of recorders in the late 1950's and 60's, Tom Reps and his team decided to design and build their own tape mechanism, based on what he had learnt from the mistakes of others.

The result was a mechanism which operated smoothly and positively with light button operation. A generous 10 watts per channel output was provided with two internal 6" x 4" oval speakers.

Additional images, a detailed vintage test report and a user manual for this model are provided on the Get Reel Contemporary Classics CD-Rom.

Specifications at a glance
Price when new (in the UK)
 £120 15s
Track system
quarter-track stereo
three (Bogen)
single hysteresis synchronous with solenoid operated controls
Maximum reel size
Tape speeds
7½, 3¾ and 1 ips
Frequency response ( 2dB)
7½ ips: 30Hz - 18kHz
3¾ ips: 40Hz - 11kHz
1 ips: 50Hz - 7kHz
IEC (or NAB to order)
Wow & flutter
0.1% at 7½ ips, 0.15% at 3¾ ips and 0.25% at 1 ips
Signal to noise ratio
min. 50dB quarter-track, 53dB half-track (all speeds, unweighted)
Tone controls
10dBs at 50Hz, 10dBs at 10kHz (Baxandall type)
better than 55dB mono, 45dB stereo
Distortion via tape (at 1kHz)
max 2% at 0dB (7½ & 3¾ ips); max 3% at +3dB 7½ ips
Bias frequency
100kHz, push pull
54 transistors, 12 diodes
Rewind speed
150 seconds max for 1800ft LP tape
Audio output power
2 x 10 watts RMS per channel (8 ohms), 7 watts (16 ohms)
microphone: 600 - 50k ohms, 0.8 mV jack socket
radio: 100k ohms, 80mV DIN
gram: 47k ohms, 2mV corrected RIAA, DIN
line: 2k ohms, 0.5 V DIN
radio: 10k ohms, 0.25 V DIN
speaker: 10 watts @ 8 ohms
headphones: stereo jack socket, medium and low Z version
two 6" x 4"
portable with lid: 8 x 16 x 19" (203 x 406 x 483 mm)
chassis version - 32 lbs (14.5 kg), portable 38 lbs (17.3 kg)
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