SANSUI TC-505
¥ 37,500 (released in July 1968)
Commentary
Stereo preamplifier equipped with AM/FM tuner.
The FM front end of the tuner section employs a 3-row varicon and an FET in the RF stage to obtain high sensitivity and to improve the ability to eliminate interfering waves such as cross modulation and image rejection.
In addition, the AGC circuit improves the selectivity in a strong electric field.
The 4-stage IF amplifier and 3-stage limiter circuit provide sufficient limiter limiter effect make reception easy even in noise prone areas.
Muting and Noise Canceler switches are 3-stage switching systems, so you can enjoy noise-free broadcasting both when selecting channels and when receiving signals.
Muting eliminates inter-station noise and allows quiet channel selection.
The noise canceller eliminates the conventional high-cut method and eliminates noise when receiving FM broadcasts without cutting the high-frequency audible range.
The power supply for the FM front-end, FM and AM sections uses a stabilized Zener diode power supply.
In particular, we have succeeded in eliminating the AFC circuit by safely compensating the temperature of the station generator with the front end and minimizing the station generator drift by stabilizing the power supply.
Equipped with a sharp pinpoint tuning circuit.
Equipped with 35 db separation FM multi-circuit.
Equipped with pure electronic FM stereo and mono switching.
The FM antenna is equipped with two circuit impedance terminals of 300 Ω and 75 Ω, and is equipped with a local / variable switch so that undistorted reception is possible even in high-field areas.
The AM tuner section contains a high-sensitivity ferrite bar antenna.
The preamplifier section consists of an NF amplifier for all amplifier circuits from the first stage to the final output stage.
A specially selected low-noise silicon transistor is used in the equalizer circuit, and an all-silicon transistor is used in the low-frequency section to reduce the S/N ratio.
The tone control amplifier section is designed with attention to noise and distortion characteristics by using low-noise silicon transistors and NF-type tone control.
It is equipped with a headphone jack separate booster independent of the output circuit, it can also be used effectively as a monitor.
Accessories such as high filter, low filter and loudness control are mounted.
Model Rating
Preamplifier with FM/AM tuner | |
Tuner Section | |
FM : Receive Frequency | 76 MHz to 90 MHz |
Sensitivity | 2.0 μ V ± 3 dB (S/N : 20 dB quieting) |
Image ratio | 50 dB or more |
Selectivity | 45 dB or more |
S/N | 60 dB or more |
Harmonic distortion factor | Not more than 0.8% |
Spurious response rejection | 60 dB or more |
Spurious Radiation | 34 dB or more |
Capture ratio | 3.0dB(IHF) |
FM stereo separation | 35dB |
IF Rejection | 60 dB or more |
Local/Distant Switch | Local:attenuate 20dB Distant:Direct |
AM : Receive Frequency | 535 kHz to 1605 kHz |
Sensitivity (IHF) | 20 μ V ± 3 dB (1000 kHz) |
Selectivity | 20 dB or More (1000 kHz) |
Image Rejection | 40 dB or More (1000 kHz) |
IF Rejection | 60 dB or More (1000 kHz) |
Preamplifier Section | |
Output (Emitter Follower) | Rating : 1.5 v Maximum : 3 v |
Harmonic distortion factor | 0.3% or less |
Input Sensitivity / Impedance (Rated Output) |
Phono : 2.5 mV ± 3dB/50k Ω AUX : 150 mv ± 3dB/100k Ω Tape Monitor (Pin) : 200 mv ± 3dB/100k Ω Tape Monitor (Din) : 200 mv ± 3dB/100k Ω |
Recording Output (Rated Output) | Pin : 150 mv ± 3 db Din : 30 mV ± 3 dB |
Hum, noise (rated output) | Volume Min : 80 dB or higher Phono : 65 dB or more AUX : 75 dB or more |
Channel separation (Rated Output) |
Phono : 50 dB or more AUX : 50 dB or more |
Equalizer | Phono : RIAA, NF Type |
Control, switch | Bass : ± 12 dB (50 Hz) Treble : ± 10 dB (10 kHz) Loudness : 50 Hz + 8 dB, 10 kHz + 2 dB (at volume -30dB) Low filter : -12dB at 30 Hz High filter : -12dB (15 kHz) |
Selector switch | (1)Phono (2)FM AUTO (3)AM (4)AUX |
Mode switch | 1:mono(L+R) 2:Stereo |
<General> | |
Configuration | 28 tr, 20 di, 1 FET |
Pwer | 100 VAC, 50Hz/60Hz |
Power consumption | 10VA |
External dimensions | Width 382x Height 111x Depth 267 mm |
Weight | 6.3kg |
Sold Separately | Dedicated Wood Case C-9 |