Sony TA-F7B

Sony TA-F7

1 9 7 6 november 1976
1 9 8 1 1981

The TA-F7B is a brilliant V-FET unit, using the same stable BJT and V-FET differential cascode mix as the TA-N7B Meisterstück, but with three transformers instead of four and slightly reduced caps : 4x 15,000µF instead of 4x 22,000µF.

The TA-F7B uses 4 heatsinks with 1 row of three 2SJ18 or 1 row of three 2SK60 for each heatsink - saves up space. The twin toroidal transormers of the TA-N7B are here placed one of top of the other - saves up space, too ; they were custom-ordered to Nippon Kinzoku, a company still in business today which must have provided most if not all toroid trafos to high-end JP hi-fi throughout the 70s and early 80s.

The phono stage is a dual-Fet differential amp with current mirror ; FET inputs for the lines, differential amplifier afterward. All DC, of course.

Costing 178,000¥, the TA-F7B marked the lower-end of the really expensive (japanese high-end-wise, in 1976) but given the quality, reliability-wise AND sound-quality, Sony must've made very little profit selling them.

As on the ST-A7B masterpiece, the front is made of several plates of aluminium and steel to give a tangible feeling of depth and solidity - not only a feeling ! The sub-panel which holds the secondary functions is in fact a separate aluminium plate welded to the main one by way of a steel surround painted in matte black.

The mechanical build quality of all "sevens" (ST-A7B, TA-N7B, TA-E7B and TA-F7B) puts to shame almost every other audio component built around the same time - really.

The original export version of the TA-F7B was silver in color with all the scripting being silkscreened and not stamped : TA-F7. That version was quickly replaced by the normal, green/bronze TA-F7B.

The same happened to all the 7s : ST-A7, TA-N7, TA-E7, TA-F7 ; the silver versions all bear low serial numbers and are exceedingly rare. The production run for the F7B should be around 3000 pieces, worldwide ; that of the export F7 300.

Anyway -
To get an even better sound, the way to go is to hook a TA-E88B and a TA-N7B : musical bliss and nirvana.

Sony TA-F7B, image 1 Sony TA-F7B, image 2 Sony TA-F7B, image 3
Sony TA-F7B specifications
Title Value
MAIN section MAIN section
Power output : 2x 70W (8 Ohm , 20Hz...20Khz)
THD (rated power) : 0,015% (20Hz...20Khz)
0,05% (5Hz...50Khz)
THD (1W) : 0,015% (20Hz...20Khz)
0,05% (5Hz...50Khz)
Power bandwidth : 5Hz...40Khz
Frequency response : DC...100Khz (+0 / -1dB)
Damping factor : 60 (8 Ohm, 1Khz)
Residual noise : 0,12mV
S/N ratio : 110dB
Input : 1V / 100kOhm
Output : 4 Ohm...16 Ohm
PRE section PRE section
Inputs : 2,5mV / 50kOhm (Phono 1&2 ; 100pF)
150mV / 50kOhm (lines)
Max. phono input : 250mV (0,015% THD ; 1Khz)
Outputs : 150mV / 10kOhm (REC out)
1V / 1,5kOhm (PRE out)
Frequency response : 5Hz...100Khz (lines ; +0 / -1dB)
± 0,2dB (phono 1 & 2)
S/N ratio : 75dB (IHF-A ; phono)
95dB (IHF-A ; lines)
Bass control : ± 10dB @ 30Hz (150Hz turnover)
± 10dB @ 60Hz (300Hz turnover)
Treble control : ± 10dB @ 20Hz (4Khz turnover)
± 10dB @ 40Hz (8Khz turnover)
Low filter : 12dB/octave below 30Hz
High filter : 12dB/octave above 9Khz
General General
PC : 192W
Dimensions : 43 x 17 x 42cm
Weight : 20kg.
List : 178,000¥
Accessories : RK-5S cable (6500¥)
Sony TA-F7B : 1 topic
(last updated topic shows up first)
  • Sony TA-F7 check & maintenance                             (15)last updated by NEMOaudio - 09/02/2013, 22H32
page online since : may 2006
page updated : march 2010
page type : LGT / KNB
page weight : 179.41 Kb / 0 b

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