Country of Manufacture:USA
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 4 dB): 7½ ips: 40Hz - 18kHz
Wow and Flutter:0.2% at 7½ and 0.25% at 3¾ ips
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Proudly advertised by Lafayette in their 1966 catalog as ‘our finest stereo tape deck’, the RK-650 was a quarter-track two-speed stereo deck.
Features included included 7″ reel capacity, push-button transport controls, auto cut-off switch, record level meters, 4-pole capacitor-start motor, hybrid electronics (tubes and transistors), sound-on-sound and sound-with-sound recording and pause control.
Frequency response at the higher speed was 40-12,000Hz while wow & flutter was 0.2%.
Price when new was $109.95.
Lafayette used the RK-650 deck in their RK-675 and Criterion 1000B tape recorders
Crosstalk: 45dB / Bias and erase frequency: 80kHz / Fast wind speed: less than 4 minutes for 7″ 1200ft reel / Inputs: microphone, radio, mix / Outputs: audio (.8V per channel), monitor / Valve complement: 4 tubes, 4 transistors and one full-wave bridge rectifier / Dimensions: 15½ x 11¼ x 6¼” (385 x 283 x 159 mm) / Weight: 20 lbs (9.1 kg) / quarter-track stereo