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Tube 300B directly-heated triode amplifier power amplifier kits

  • Model: Tube 300B kit Laochen
  • Shipping Weight: 14kg
  • Units in Stock: 300
  • Manufactured by: LAO CHEN

Price:   $296.00

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Notice: The product is only the components of the AMP,not the finished AMP. You install it yourself .



Technical parameters:


  •     Input selection: stereo two channels
  •     Rated output power: 7 w
  •     Overall frequency response: 25 hz ~ 32 KHZ
  •     Harmonic distortion: 1% (1 w 1 KHZ)
  •     Signal-to-noise ratio: 88 db
  •     Input sensitivity: 500 mv
  •     Input impedance: 100 k ohm
  •     Output impedance: 8 ohm
  •     Residual noise: < 3.5 mV
  •     Equipment volume (W * D * H) : 38 mm * 230 mm * 180 mm
  •     Needs using vacuum tubes:  6n8p x 2(voltage tube), 300 b x 2(powre tube), 5z3p x 1(Rectifier tube) (The tubes is not include in the packing list)
  •     Net weight: 14 kg
  •     Engine consumed power: 180 w
  •     Input voltage: 110v/50-60hz or 220V-230V/50-60hz, tell us your choise 110V or 220/230V during the order, by default we send you the version that matches the power voltage in your country, for 110v's we need extend processing time 3 days.










Technical parameter:


H 105*60 14 annealed sheet power transformer primary two sets of 110V, can be used in parallel 110V, two sets of 110V in series after the use of 220V, the output

transformer Z11 76*40 0.35 annealed sheet three clip two, inductance Z11 66*32 0.35Annealed sheetAll of 0.25A 6H transformerOxygen free copper wire winding


6n8p+300B package delivery list stainless steel wire drawing surface case +1mm *1 galvanized floor *1

The two pieces of wood

105*60Power one

76*40 output transformer *23.5k:048

Iron square cow cover two

inductance66*32 one

Eight pin header*3

300B socket* 2

Chassis pin *4

Signal input socket *2

Output crystal terminal *6

*1 power socket with fuse *1

Switch *1

Japan ALPS 16 type potentiometer 100K*1

Potentiometer knob *1

Supporting scaffolding bars

Heat shrinkable tube3mm4mmPatchtapeScrew





2w*2 15K

2w*2 27K


20w*2 1K


2w*2 91K

2w*2 4.3K

2w*2 300K

5w*1 10R

2w*1 220K


0.1uf400v*2 used imported ceramic capacitor disassemble oil






The following electronic tubes are not included in the package.

5z3p*1 inventory of new bile dawnMatching

6n8p*2 inventory of new bile dawnMatching

300B*2 new dawnMatching


Input voltage 220v50Hz 60Hz 110V
The input selection: dual channel stereo
The rated output power: 7W
The overall frequency response: 25Hz ~ 32kHz
The harmonic distortion: 1% (1W 1KHz)
The signal-to-noise ratio: 88dB
The input sensitivity: 500mV
The input impedance: 100k.
The output impedance: 8 ohms
The residual noise: about <3.5mV
The whole machine volume (W * D * H * 230mm * 180mm): 38mm
The use of vacuum tubes: 6N8P * 2, 300B * 2 and 5Z3P * 1
- weight: 14kg
The whole machine power consumption: 180W