| Title | Value |
|---|---|
| PRE / MAIN section | PRE / MAIN section |
| RMS power output : | 2x 165W (20Hz...20Khz, 8 Ohm, 0,08% THD) |
| 20Hz...20Khz continuous power output : | 2x 205W (20Hz...20Khz, 4 Ohm, 0,08% THD) |
| 1Khz power output : | 2x 175W (8 Ohm, 0,08% THD) |
| 2x 230W (4 Ohm, 0,08% THD) | |
| THD : | 0,08% at rated power (20Hz...20Khz) |
| 0,05% at half rated power (20Hz...20Khz) | |
| 0,015% at helf rated power (1Khz) | |
| IMD : | 0,01% |
| Damping factor : | 60 (8 Ohm) |
| 30 (4 Ohm) | |
| Inputs : | 2,5mV / 25 - 50 - 100kOhm (phono 1 & 2) |
| 2,5mV / 50kOhm (lines) | |
| Outputs : | 200mV (tape REC) |
| Maximum input level : | 20mV (1Khz, RMS) |
| S/N ratio : | 78dB (phono, IHF A) |
| 95dB (lines, IHF A) | |
| Frequency response : | ±0,2dB (RIAA, phono) |
| 20Hz...20Khz (+0 / -0,3dB) | |
| Bass control : | ± 12dB @ 50Hz |
| Bass turnovers : | 250Hz / 500Hz |
| Treble control : | ± 10dB @ 10Khz |
| Treble turnovers : | 2,5Khz / 5Khz |
| Loudness control : | +10dB @ 50Hz |
| Low filter : | 12dB/octave below 30Hz |
| High filter : | 12dB/octave above 7Khz |
| FM section | FM section |
| Sensitivity : | 10,3dBf |
| 1,8µV (IHF'58) | |
| 50dB quieting : | 12,8dBf (2,4µV IHF'58, mono) |
| 35,7dBf (33,4µV IHF'58, stereo) | |
| THD : | 0,1% / 0,15% (100Hz, mono / stereo) |
| 0,1% / 0,15% (1Khz, mono / stereo) | |
| 0,2% / 0,4% (6Khz, mono / stereo) | |
| S/N ratio : | 85dB (hi-lag, mono) |
| 75dB (hi-lag, stereo) | |
| Hi-Lag frequency response : | 20Hz...15Khz (+0,2 / -0,8dB) |
| Const frequency response : | 20Hz...18Khz (+0,2 / -0,8dB) |
| Alt channel selectivity : | 80dB |
| Capture ratio : | 1,0dB |
| Image rejection : | 85dB (98MHz) |
| Spurious response rejection : | 100dB (98MHz) |
| AM suppression : | 100dB (98MHz) |
| Stereo separation : | 60dB |
| 45dB (1Khz) | |
| Carrier leak : | 38dB (10Khz) |
| Terminals : | -65dB (19Khz, 38Khz) |
| 75 Ohm | |
| 300 Ohm | |
| AM section | |
| Sensitivity : | AM section |
| Selectivity : | 30µV, 250µV/m |
| Image rejection at 1Khz : | 22dB |
| IF rejection at 1Khz : | 47dB |
| 40dB | |
| General | |
| PC : | General |
| Dimensions : | 430W max. |
| Weight : | 59 x 18 x 49,3cm |
| 26,5kg. |
Technics SA-5770
1977
1978
Prefiguration of the not-so-well remembered SA-1000 mammoth and probably quite a "sleeper" as such.
Still a bit hectic inside... and with only two (big) smoothing caps instead of four, but the heatsinks are the same, so is the RF varicap and so are most of the (many) functions.
Power amp
• DC full complementary OCL circuit
• Each differential amp uses a single-package dual-transistor (A798 56F) with a 100% DC feedback circuit.
• Emitters/followers follow the differential first stage.
• Pre-driver stages are constant-current loaded Class A amplifiers.
• Parallel push-pull output.
• Multiple protection circuits with overload alarm
Preamp
• Low-noise, overload-resistant phono EQ section.
• First stage is a differential amp with current mirror load.
• Second stage is low-distortion Class A amp which drives the SEPP output circuit with low impedance.
• Detented volume control with 26 2dB steps
• Low distortion tone controls with three-stage DC circuit and tabilized differential amplifiers (1st stage) and SEPP output (final stage)
Tuner
• 4-gang dual-gate MOS-FET Mixer with point-to-point wiring in the FET buffer-equipped local oscillator
• Flat group-delay ceramic filters with 6 stages of differential amplification by way of constant-current supply and three ICs and discrete stages
• Independent IF control circuit, high-linearity detector with select detector diodes
• FM MPX PLL IC with double-differential switching
• 300% overmodulation tolerance
• Stabilized and regulated tuner power supply
• Quality AM section with IC and double-tuned LC filter in the IF circuit
• Phase delay switch
page online since : august 2008
page updated : not yet
page type : LGT / KNB
page weight : 157.14 Kb / 0 b
page updated : not yet
page type : LGT / KNB
page weight : 157.14 Kb / 0 b
- TVK Talk Forum
- TVK Museum
- Specials
- Timelines
- Utilities
- Games