Recommend specification of power transformer:Ĥ. Components and parts included, refer to the BOMģ. Coupling capacitor used the best human voice French SCR Suren one tube bases of 300B are made of 95 ceramic base with special 24K gold-plate contacts, to ensure the PCBA achieving perfect performance, detailed see the BOM. High quality component and parts are used, all are new parts. Circuit is free debugging, making simple.ĥ. PCB with 2.0mm thick high-quality immersion gold.Ĥ.

Designed with tube 6SN7 + 300B single-ended output form, the most authentic classic 300B solution.Ģ. ( This 300B tube kits doesn’t contain the required five vacuum tubes, only PCBA as above photo shown) Featuresġ. Photo after fixed tubes (The last version below for you information only) The kits need be soldered and tested by buyer self, no including any tubes and Transformer.ġ.This version is the latest version (version 1.1) that increases the gain of the preamplifier stage and the sound field positioning is even better.Ģ.The resistance and capacitance of PCB parameters and schematics are slightly different.The standard parameters of PCB shall prevail. Output transformers are made of high-grade silicon steel plate Z11, and used imported electronic vacuum tubes. And this 300B PCB material is 2.0 thick double copper immersions gold. Because the PCBA board is free testing, and its manufacturing difficulties is equal to assemble a LM1875 amplifierįramework of 300B tube amplifier kit adopts 6SN7 plus 300 B single-ended outputs. Now, there are well-made PCBA instead of scaffolding soldering, the problems above will be completely resolved, and it is not difficulties since then. 300B Tube Amplifier Kits Stereo Power Stage 6SN7 Preamp 5U4G Rectifier HIFI Audio DIY Model No: WHFT-A300B(NS)Ī lot of HIFI audiophiles like to do DIY 300B tube amplifier with scaffold-soldering way previously, but that is a great engineering and too much wiring, reliability and performance may be affected, also its appearance does not look good.

Power amplifier diy