Tape Recorder 5A

A transportable two track two speed mono tape recorder.

Specification
Recording Medium                          Standard or "Extra Play" ¼" plastic coated tape.
                                                     On reels up to a maximum of 8¼" dia. coating inside
Track Width                                    0.1"—displaced to one edge.
Number of Tracks                            2
Operating Tape Speeds                    7½ and 3¾ ips
Playing Time Per Track                    Large Reel            45 mins at 7½ ips
                                                     1,750 ft. Std. Tape  90 mins at 3¾ ips
Playing Time Per Reel                     11 hours and 3 hours respectively.
                                                      Note :- The above playing times will be increased
                                                      when "extra play" tape is used.
Rewind Time (and Wind On)              Less than one minute for 1,750 ft. reel standard tape
Frequency Response                       3¾ ips  40-10,000 Hz. ± 3dB
                                                      7½ ips  40-15,000 Hz. ± 3dB
"Wow & Flutter"                               Less than 0.16% at 7½ ips
 (As a change in tape velocity)
Long Term Speed Stability                Better than 0.5%
 (For constant Mains Input Frequency)
Erase and Bias Frequency               68 kHz. approximately.
Input Levels                                     Input 1, min. signal 0.003V RMS.
  (For Full Depth Recording)              Input 2, min. signal 0.15V RMS.
                                                      Impedances, 1 Megohm and 80Kohms respectively.
Output Arrangements                      15 ohms 10" x 6" internal elliptical speaker.
                                                     Socket on front panel for external speakers.
Output Power                                 2.5 watts into 15 ohms.
Signal to Noise Ratio                      In the range 200Hz. to 15 kHz, better than 50dB
                                                     Unweighted, including hum, 45dB.

The Ferrograph 5A can be converted to Ferrograph 5S stereo specification by replacing the dummy head in head position 3 with a stereo FP16 head.

In questo link sono elencati 21 modelli, di cui 18 con immagini e 8 con schemi.
Elenco delle radio e altri apparecchi della Ferrograph, British Ferrograph Recorder (Wright & Weaire); London