Technics ST-7300II
¥ 30,800 (around 1977)
Commentary
An FM/AM tuner pursuing its original performance as a tuner.
The front-end section is composed of three FM-trains and two AM-trains.
A PLL / MPX demodulation circuit is used in the MPX section.
Three unique ICs (AN 377, AN 363, and AN 217) are used to achieve high reliability, low distortion, and high sensitivity.
Equipped with a Rec level check switch that is convenient for setting the level of the FM air check and a signal meter / tuning meter.
It uses PRC (Printed Resistance Board) with increased reliability of the whole circuit.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Practical sensitivity | 0.9 μ V (IHF' 58) / 10.3 dBf |
| SN ratio 50 dB sensitivity | Mono : 2.0 μ V (IHF' 58) / 17.3 dBf Stereo : 28 μ V (IHF' 58) / 40.2 dBf |
| Total harmonic distortion factor | mono:0.2% stereo:0.4% |
| Signal-to-noise ratio | mono:75dB stereo:70dB |
| Frequency characteristic | 20 Hz ~ 15 kHz + 0.5 -1.5 dB |
| Selectivity | 55dB |
| Capture ratio | 1.0dB |
| Image Interference Ratio (83 mhz) | 50dB |
| IF interference ratio | 85dB |
| Spurious interference ratio (83 MHz) | 75dB |
| AM suppression ratio | 55dB |
| Stereo separation | 45dB(1kHz) 35dB(10kHz) |
| Leak carrier | -35dB(38kHz) |
| Antenna terminal | Dedicated 75 Ω |
| <AM Tuner Section> | |
| Receiving frequency | 525 kHz to 1605 kHz |
| Practical sensitivity | 30 μ V, 250 μ V/m |
| Selectivity | 30dB |
| Image interference ratio (1,000 kHz) | 55dB |
| IF disturbance ratio (1,000 kHz) | 40dB |
| <General> | |
| Output voltage | Fixed:0.6V |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 9W |
| External dimensions | Width 410x Height 142x Depth 250 mm |
| Weight | 3.9kg |