6V DC Germanium Tube Amplifier Splitter Headphone Preamplifier Board 3AX31 3BX31

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eBay 6V DC Germanium Tube Amplifier Splitter Headphone Preamplifier Board 3AX31 3BX31 Description: All germanium tube amplifying split element front-end earphone amplifier board.The germanium tube dual-channel preamplification circuit, the secondary circuit 2 times amplification, nostalgic circuit, suitable for CD, mobile phone, and other digital signal audio input.For those who have never played germanium tubes and have not heard of the charm of germanium tubes, you can give it a try and increase your experience and experience! The germanium transistor is the originator of the transistor. Before the appearance of the silicon tube, the germanium tube dominated the world, and the most common one is the old semiconductor radio.Now using it as an audio amplifier, the sound is soft and durable, the sound is delicate, and the taste is nostalgic. The tone of the germanium tube is warm and mellow, delicate and transparent, relaxed and continuous, quite similar, and the tone is different from the silicon tube.It is also different from the electron tube and also different from the field effect tube, which has its own unique charm and style. The sound of the germanium tube is thicker and softer than the silicon tube. The reason why it is charming is also due to its so-called AGC capability, that is, the higher the bias voltage (the greater the current), the larger the HEF. This feature makes the sound emitted by the germanium tube extremely expanded Power is not simply described and compared with a more traditional voice like the guts, but it is natural to the germanium tube. This line has 6 germanium tubes amplified, 6V DC working voltage, working current is about ten to tens of MA.Use foreign FM radio headphones to monitor the amplification circuit, input signal voltage of 1V to 1.5V, and 2 times the voltage gain, which is not easy to cause signal de-topping distortion. It is obviously different from modern high-index low-distortion operational amplifier circuit. The circuit board is made of excellent materials. The first stage amplifies the military-specified 3AK20 germanium transistor switching transistor, and the second stage uses 3AX31, 3BX31 or other types of push-pull output. Note: This is a simple amplification circuit, suitable for 8 ohm to 32 ohm earplugs for mobile phones, not suitable for low-sensitivity headphones, high-impedance headphones. External 6V stabilized power supply is required, and the line is quiet. Affirmation: It is not equipped with a schematic diagram, and the voltage is 6V regulated power supply. Do not use over-voltage, otherwise the tube will be burnt. Note: For small signal amplifier boards, if the signal is too large, it is easy to be distorted. It must be added A potentiometer before signal input , control the size, otherwise the strong signal is easy to be distorted. Package included: 1PCS * Preamplifier Board PaymentDelivery detailsTerms of salesReturnContact us Payment We accept payment by PayPal only. Payment must be received within 7 days after auctions ended. Delivery details Items will be shipped within 1-2 business days when we received payment. Shipping to USA takes about 8-15 days in normal condition,other countries takes about 15-35 days. Please verify your eBay primary shipping address. We are not responsible for any wrong or undeliverable addresses. Terms of sales All items will be checked before packing Your feedback and 5 star ratings are much appreciated. If you are unhappy with your purchase, please contact us on negative / neutral feedback or low star ratings. Return If you receive an item is damaged or defective, we will refund you or replace it with identical one. All damaged or defective items may be exchanged within 30 days. Contact us We take full responsibility if you receive wrong item or damaged item or item not as describled. If you’re not satisfied for any reason, please feel free to contact us. Just send us an eBay message.

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6V DC Germanium Tube Amplifier Splitter Headphone Preamplifier Board 3AX31 3BX31

Frequently Asked Questions About 6V DC Germanium Tube Amplifier Splitter Headphone Preamplifier Board 3AX31 3BX31 in My Website

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