TU-875  Stereo Tube Preamplifier
 
 

TU-875  12AU7/ECC82 HYBRID STEREO PREAMPLIFIER                        

  

 $350.00                  
    

Features:

  • This is a simple preamplifier without tone control. The pe-amplifier has a volume and balance control, a phono equalizer and a MC head amp. It is also compatible with a MM/MC cartridge.

  • A hybrid construction using J-FET with a MC  head amp an  equalizer  to give a low noise effect without compensating the quality of music produced by the tubes.

  • An AC adapter (DC 7V stabilized power outlet) is separate and is used as a  power supply. A secondary power for the  vacuum  tubes  is  supplied  by  a  steady  DC 200V  from the DC-DC converter of a sealed box. With the main body and  power  supply  separated, the electromagnetic hum noise is reduced.

  • A printed circuit board is included for easy assembly.

Reviews: www.6moons.com

http://www.6moons.com/audioreviews/trends/ta10_3.html

Another preamp contender was the Elekit TU-875 from Japan. Although offering even   better value  for  money --  with  MC/MM phono and volume/balance control it goes  for around C$400 including shipping - this cute-looking preamp was warm but less well defined in resolution and  slightly  compressed  in  the  soundstage.  Nevertheless  it's  worth mentioning because for such a small setback, you  could  reward  yourself  with  the rich  sound of the  Philips  JAN 5963  tubes and the low  noise J-FET/tube  hybrid  RIAA circuitry. Considering the  gain in  headroom for  wider dynamic range, this  was still a fair trade and a good match for the TA-10.

Great for hobbyists and DIY enthusiasts:

http://www.geocities.jp/mkumasanyo/preamp.html

 

http://www.bea.hi-ho.ne.jp/tnak/TU875.htm

 

http://web2.incl.ne.jp/yamaki/tu875.htm

http://www.e-sherry.jp/xoops/modules/smartsection/item.php?itemid=4
 

Specifications:

Vacuum Tubes

 

12AU7/ ECC82  x 3

FET (for Phono)

2S170 x 4

Input   terminal

PHONO (MM/MC: is changed by rear panel switch)
LINEX2
TAPE(MD) x 1

Output terminal

PRE-OUTx1
REC-OUTx1

Input resistance

PHONO:100 ohm (MC) /50 k ohm (MM)
LINE,TAPE(MD):40k ohm

Input

PHONO:0.3mV(MC)/2.7mV(MM)
LINE,TAPE(MD):230mV

Maximum power: 1kHz、THD2%）

PRE-OUT: 22V
REC-OUT( PHONO ):13V

SN Ratio (IEC)

PHPNO: 84.5dB (MC)/72.5dB (MM)
LINE,TAPE(MD):94dB

Frequency

PHONO: RIAA 0.8dB
LINE,TAPE(MD):2Hz~130kHz (-3dB)

Power source

DC7V +/- 0.5V consumption currency approx. 1.8A
Original stabilization AC adapter ( input AC100V~240V 50/60Hz)    

Weight

1.8kg