Payment and point member | Payment methods | Shipping methods | Warranty policy | Shopping procedure

GM-70 SINGLEJapan

Ask
Manufacture:P&C
Price: JPY 452,727
26-48955-03646-00
Japan
Arrival: 2026-03-15 20:07:06
Maintained! A single amplifier equipped with the last military vacuum tube GM-70 in the Soviet era. It has a softer tone than the 845, and the sound and breadth of the instrument is richer. Excellent compatibility with large ALTEC speakers, etc. There is a scratch on the front. (FUJISAWA KOSHI) Maintenance information: 2026.3.15 Maintained (WE310A electrode drawer and adhesive treatment between cap and vacuum tube body. Screw inspection and tightening treatment for the GM-70 socket part during internal inspection. The vacuum tube operating voltage was checked, and the GM-70 operated normally with a plate voltage of 920V and a current of 85mA. Bias is a self-biased method. A power supply for DC ignition was added to minimize residual noise. Also, since a voltage of about 1000 V is ignited to the output transformer, the secondary terminal 0V is connected to ground as a preventive measure to prevent electric shock due to transformer leaks, and the sound output test is good. Gain: 14.8 times (approx. 23 dB) Less than 10W (8Ω) near the maximum input volume with 1V input. Undistorted maximum output: 9W (at 8Ω1kHz) Frequency characteristics: 47Hz to 12kHz (-3dB) measured at 8Ω1W output. Input impedance: 100KΩ XLR terminal, but not 600Ω. (Number 2 is + and number 2 and 3 are Earth.) Accessories: power cord Main specifications: approx. 10W+10W (actual measurement) vacuum tube using GM-70 x 2 Philips ECG 5R4GYB x 2 WE 310A (top mark/small punch) x 2 W500 x H273 x D364 mm 38.1 kg (actual measurement)
　　
UsedUsed
ConsignedConsigned
HoldHold
ReservedReserved
Sold OutSold Out
HiFiDo Home
  • Your shopping cart
  • Your cart is empty.