National SA-30
¥ 76,000 (around the late 1960 s?)
Commentary
Stereo amplifier using MFB method.
It uses low-noise 12AX7 and uses a full DC ignition system.
All the equalizers and tone circuits in the preamp section are NF-type with excellent characteristics.
Model Rating
| Type | Pre-main amplifier |
| Input terminal | Aux, MAG, Tuner, X' tal |
| Input impedance | MAG : 50k Ω Aux, X' Tal, Tuner : 1M Ω |
| Output | 30W(15W+15W) |
| Tone control | NF Type ± 16 db |
| Used vacuum tube / diode | 12AX7x3 6AN8x2 6BQ5x4 5AR4x1 OA-70x2 |
| Pwer | 100 VAC, 50Hz/60Hz |
| External dimensions | Width 390x Height 148x Depth 299 mm |
| Weight | 13.8kg |