National SF-175
¥ 49,800 (around 1967?)
Commentary
A record player with a belt drive system.
The turntable uses a belt drive system using a 4-pole hysteresis synchronous motor and a polyurethane belt.
The tone arm uses a pipe arm equipped with a lateral balancer and an inside for scan seller.
The lateral balancer balances the weight of the left and right sides so that no unnecessary force is generated between the needle tip and the record. In addition, the lateral pressure applied to the record is reduced by the inside for scan seller.
In addition, since the oil dump arm lifter is adopted, stable pickup operation is possible, and the record and needle are prevented from being damaged.
The head shell has adopted a universal type corresponding to international standards, and various cartridges can be used.
Model Rating
Type | Record player |
Drive system | Belt drive system |
Drive motor | 4-pole hysteresis synchronous motor |
Number of revolutions | 33 1/3, 45 rpm |
Signal-to-noise ratio | 45 dB or more |
Turntable | 30 cm Aluminum Die Cast |
Tone arm | Static balanced type pipe arm With Lateral Balancer, Inside Four Scan Seller |
Proper needle pressure | 2g (Variable Range 0 ~ 3.5g) |
Cartridge | MM Type |
Frequency characteristic | 20 Hz to 20 kHz |
Output balance | Within 3 dB (1 kHz) |
Channel separation | 20 dB or More (1 kHz) |
Output voltage | 5 mv (1 khz, 5cm/sec) |
Non-standard resistance | 50k Ω |
Needle tip compliance | 6x10-6cm/dyne |
Exchange needle | EPS-10STSD (Diamond Needle) |
Auto mechanism | Oil dump arm lifter |
Cabinet | Eurasian teak |
Power consumption | 18W |
External dimensions | Width 500x Height 190x Depth 385 mm |
Weight | 8.9kg |