| Manufactured by: |
RCA Photphone, Sunbury-On-Thames,
England (an associate of Radio Corporation of America) |
| Price when new (in the UK): |
£16 10s |
| Description: |
control unit/preamplifier |
| Input for rated
output (1.2V: |
magnetic pick-up: 11.5mV
- 16mV according to selected characteristic
crystal pick-up: 0.3V
microphone: 6.5V
radio/Tape: High level - 0.2V Low level 0.05V |
| Input impedance: |
magnetic pick-up: 30K
crystal pick-up: 1M
microphone: 100K
radio/Tape: High level - 1M
Low level 300K |
| Controls: |
input selector: B78, A78, L.P., R.I.A.A.,
MIC, GND
bass: Continuously variable ±15dB at 25 c/s
treble: Continuously variable +10dB -17dB at 25Kc/s
filter: Low pass, cut off frequency 10Kc/s, 7Kc/s, 5Kc/s
slope control: Slope 8dB/octave to 35 dB/octave, also ON/OFF
switch
volume |
| Tubes: |
1 x EF86 (6267) - Record
equalizer;
1 x ECC81 (12AT7) - Voltage amplifier and tone control
1 x ECC81 (12AT7) - Filter sectio and Cathode follower |
| Dimensions: |
length 12¾ in., height 4 in.,depth
6 in (327 x 102 x 155.6 mm) |
| Power requirements: |
plate: 395V D.C. at 7.0mA; filament: 6.3V
A.C. at 1A (supplied by LMI-32216 power amplifier) |
