Elekit TU-8500 Tube Pre-amplifier Kit with Phono Stage
Elekit's DIY pre-amplifier with Phono Stage offers amazing performance in such a small package. Featuring a precision phono stage, RIAA equalization (CR, not NF) supports both MM and MC cartridges. Two low-noise OPAMPS (NJM2068DD) are used in the phono stage. The OP-AMPS are socket-mounted, making OP-AMP switching easy.
Two 12AU7 (ECC82) tubes are used in the line amp stage. The gain is switchable (Approx 1x to 3x). Reduced hum/background noise circuitry includes a low flux leakage R-core transformer, a FET ripple filter for B-power, and the tubes powered by the DC power supply.
Sufficient space has been provided on the PCB for substituting larger coupling capacitors, facilitating upgrading parts. The kit supports four different AC input voltages. 100Vac, 115Vac, 200Vac and 230Vac, so it can be used anywhere in the world.
It is an ideal complement to the TU-8200 power amp, sharing the same size footprint.
Specifications:
- Stock tube: 12AU7 (ECC82) x 2pcs
- OPamp: NJM2068DD x 2pcs
- Input terminal: RCA jack 4 lines (PHONO, LINE 1-3)
- 3.5mm stereo jack 1 line (LINE3 priority)
- Output terminal: RCA jack 1 line (PRE OUT)
- Power voltage: AC 100V 50/60Hz IEC standard inlet
- * Select from 100V, 115V, 200V, and 230V upon assembly
- Power consumption: 8W
- Dimensions: W252 x H73 x D270 mm (excl. projections)
- Weight: Approx.3.1kg (Assembled, excl. power cord)
Line Amp Stage
- Gain: x3.1(9.8dB) / x1.15(1.2dB)
- Frequency response (-3dB): 2Hz-70kHz / 2Hz-280kHz
- SN ratio (IHF-A): 122dB / 129dB
- Max.output voltage: 22V rms (1kHz)
Phono Stage
- RIAA equalization: ±0.5dB tolerance (20Hz-20kHz)
- Cartridge: MM (LOW) / MC (HIGH) switchable
- Gain (1kHz): [MM] 37dB / [MC] 63dB
- SN ratio (IHF-A): [MM]108dB / [MC]88dB
- Input resistance: [MM] 50kΩ / [MC] 100Ω
- Max.output voltage: 7.4V rms (1kHz)
PRICE (1 off) supplied with IEC lead (terminated with Japanese mains plug)
£425.00 +vat +p&p
UPGRADE PARTS
We offer the following parts for those who wish to buy the component upgrade kit. Please add the following parts to your cart.
| Part | Position | Quantity |
| (REX25-390) - 3K3 0.25W TAKMAN Carbon Film Resistor | R39/40 | 2 |
| (PRP-1/4-570) - 100K 0.25W PR9372 Metal Film Resistor | R37/38/43/44/45/46/47/48 | 8 |
| (REX25-650) - 470K 0.25W TAKMAN Carbon Film Resistor | R35/36/41/42/51/52 | 6 |
| (REY25-510) - 33K 0.25W TAKMAN Metal Film Resistors | R49/50 | 2 |
| (REY25-210) - 100R 0.25W TAKMAN Metal Film Resistors | R53/54 | 2 |
|
S3Q470N: 0.47uF 1000Vdc Solen FEP Tin Foil / Teflon Film Capacitor OR |
C11/12/15/16 | 4 |
Also, you can upgrade the volume control to
Some extra work is required to fit the potentiometer. Unfortunately, all stepped attenuators are too large,
See our three instructional Youtube videos below on how to construct the Elekit TU-8500 kit