Revox A700 Reel to Reel Recorder (03/27/2011)

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Revox A700 Reel to Reel Recorder

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Revox A700 Reel to Reel Recorder

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Sold Date: 03/27/2011
Channel: Online Auction
Source: eBay
Category: Tools

Revox A700 sold new in 1975 for $1800.00 USD - was produced by struder Revox in Switzerland. This unit includes the Hubs and aluminum take up reel. Owned by a serious audiophile whom passed away last year. This unit runs at 3.75, 7.5, & 15ips. 4 track recorder, includes Dust Cover, & copy of Service Manual. This is your chance to own a piece of Audio History that works!

SPECIAL FEATURES OF THE REVOX A700
ntegral control features.
1.
Tape transport mechanism with three servo controlled A.C. motors.
2.
Quartz clock generating 1.6384 Mega Hertz reference signal for control of capstan motor speed at 3 3/4, 7 1/2 and 15 ips.
3.
Speed sensor ring operating simultaneously over the entire circumference of the capstan motor for detection of total motor motion. Both frequency and phase comparisons made with internal reference clock.
4.
Servo control of spooling motors via two independent tape tension sensors. Constant tape tension maintained in all operating modes (including wind and braking procedures).
5.
Sinewave control of all motors producing minimal wow and flutter.
6.
'Fail Safe' auto stop logic operating in all the modes. Logic control monitors tape via tape motion; tape tension; and photo electric 'end of tape' sensors
Auto stop will activate:
a) at the end of the reel
b) if reel is jammed externally prior to the tape tension exceeding permissible level (to avoid tape damage).
c) if tape breaks due to structural weakness.
7.
Especially developed custom integrated circuits for quartz reference clock, divider circuit, frequency and phase comparitor, motor control with analog multiplier and sinewave output and electronic interlocked operating controls. Unique to Revox.

OPERATING FEATURES
1.
Programmed control logic utilising integrated circuits with 'watch dog' memory system.
2.
Speed control logic illuminates speed selector button to confirm operation at exact synchronous speed
3.
Tape motion sensor produces tape counter read out in minutes and seconds (actual playing time at 7 1/2 ips).
4.
'Repeat' program for instant replay. Regardless of operating mode, when button is pushed tape transport rewinds. Release of button automatically stops transport and engages 'play' mode.
5.
'Automatic' recycle program for continuous replay
6.
Electronic 'Pause' control effective in all modes (including wind). Memory function returns transport to previous operating procedure when pause is released.
7.
Solid state switching of all audio network completely eliminating possibility of Extensive use of 'low noise' integrated circuits in audio circuits.
8.
Tape speed externally variable:
a) with auxiliary unit (shortly available) for variation of tape speed over ± 7 half tones at any of the three tape speeds. Lamp indicator confirms synchronization 'lock in'.
b) with external variable frequency ocillator, with range from 1 to 10 kHz. It is possible to vary tape speed from 2.5 to 21.5 ips.
9.
Independent inputs available for:
4
Balanced Microphones, selection of Hi/Lo impedance
1
Stereo phono input. Built in RIAA, pre-amplifier for magnetic pick up
1
Stereo radio input
2
Stereo auxiliary inputs
10.
Four individual linear faders for input mixing with one stereo master fader for record volume.
11.
Jewel bearing VU meters with over modulation warning lights. Meter operation is switched in conjunction with mode selector (record or playback monitor).
12.
Stereo echo facility for recording and multiplay for dubbing.
13.
Two individual linear faders for control of output volume and balance. Stepped tone controls (bass and treble).
14.
5 outputs as follows:
Line output A: Fixed stereo
Line output B: Switched stereo, mono, left or right
2 Headphone outputs - via volume and tone controls
1 Power amp. Output - via volume and tone controls
15.
'Plug in' sound head assembly in half or quarter track c...

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