Revox A77 Service Manual

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6.7. Output Voltage Check
— Set controls per fig. 6.7 — 85
,. ,e . "77 - 7.:, •, /1/ ....4 ...or•erofe " 4----4.-
MAX
Fig. 6.7-85
MAX
MAX
— Load tape, switch to Record ( Stereo ).
— AF- generator 500 Hz, full modulation.
— AF frequency millivoltmeter at output CH 1 or CH 2.
Output voltage shall remain constant( ± 1 dB ), when the
before and- after- tape switch I NP / NAB / I EC and the play-
back mode switch STEREO / CH 1 / CH 2 / MONO is
switched around. If the output voltage doesn't stay within
the indicated tolerance, proceed per 6.5.4.
6.8. Wow and Flutter
The values given in the technical data are measured with a
wow and flutter meter per Std DIN 45507. Values obtained
by a different standard can't be compared.
33

Revox A77 Specifications

General

Wow and Flutter	0.08% (7 1⁄2 ips)
Frequency Response	30Hz to 20kHz (7 1⁄2 ips)
Signal to Noise Ratio	60dB
Type	Reel-to-Reel Tape Deck
Track System	4-track, 2-channel stereo/monaural
Reel Size	Up to 10.5 inch reel
Motor	2 x reel, 1 x capstan
Inputs	Mic, Line
Outputs	Line
Tape Speed	3 3⁄4 and 7 1⁄2 ips