Vacuum Tube Amplifier / 12AU7 Preamp (Line Amp) / Handmade / Includes Spare Tube
102.30 USD(tax included)
／184.14 USD (Excluding tax)
Sales unit: 1 piece
Application number: / Manufacturer: / Model number: m33905395933 / JAN code: / AS ONE / NAVIS Product number:
| Application number | |
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| Manufacturer | |
| Model number | m33905395933 |
| JAN code | |
| Sales unit | 1 piece |
| Price | 102.30 USD (tax included) / 184.14 USD (Excluding tax) |
*Additional shipping fees will be charged for this product in Okinawa Prefecture, remote islands, some other areas, and mountain areas. Please note that we may not be able to deliver depending on the region. If we are unable to deliver your order after placing your order, Askul will contact you.
Please note the following points as this item is directly shipped.
- Additional shipping fees will be charged for this product in Okinawa Prefecture, remote islands, some other areas, and mountain areas. Please note that we may not be able to deliver depending on the region. If we are unable to deliver your order after placing your order, Askul will contact you.
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This image is a representative image. Please check the specifications for details.
Stock: Slightly
Direct delivery product
Shipping charges for products from this shipping source will be borne by us.
58 USD (tax included)
/ 63.8 USD (Excluding tax)
Product details
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| Product features | Category Amplifier Condition Some scratches/marks Shipping Included in price (by seller) From Ibaraki |
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| Manufacturer name | - | Brand name | - |
| remarks | [About returns] We cannot accept returns due to customer's convenience. | ||
| Product details |
This is a preamplifier (line control amplifier) using a 12AU7, designed for a vacuum tube power amplifier. It uses only one 12AU7 tube with a very simple circuit where each 1/2 unit is assigned to the left and right channels. While the tone control circuit is omitted, it delivers a powerful sound with a balanced response from low to high frequencies. ■ The 12AU7 is used as the reference tube, but as a compatible amplifier, other tubes such as 5814, 5963, 12AX7, 5965, 12AT7, 6201, 12R-LL3, and 12AV7 can be directly swapped in. ■ The dimensions are compact: 120mm (height) x 200mm (width) x 250mm (depth). ■ There are two input terminals (CD, AUX), totaling 3 inputs. For the AUX input, an additional terminal has been added with slightly reduced input sensitivity via a resistor, which is convenient for signals with higher input voltage. ■ A phono equalizer amplifier is required for playing LP records. ■ There are some unevenness in the repainted case. ■ The fuse holder cover is missing. ■ A spare 5963 tube is included. ■ Operation of 12AU7 (1/2) ・Ep: 67.5V ・Ip: 1.56mA ・-Eg: -2.5V ■ Input/Output Characteristics ・Maximum Output Voltage: 34V / Input 5V This compatible amplifier allows for direct swapping of many tubes. Below are the operating data for tubes other than 12AU7 as a reference when swapped. ■12AX7 ・Ep: 119V ・Ip: 0.59mA ・-Eg: -0.95V ■5963 ・Ep: 57.0V ・Ip: 1.75mA ・-Eg: -2.8V ■5965 ・Ep: 78.0V ・Ip: 1.31mA ・-Eg: -1.45V ■12AT7 (6201) ・Ep: 104V ・Ip: 0.91mA ・-Eg: -2.5V ■12R-LL3 ・Ep: 78.0V ・Ip: 1.30mA ・-Eg: -2.1V ■12AV7 ・Ep: 86.0V ・Ip: 1.25mA ・-Eg: -2.0V Oscilloscope observations of waveforms at an output voltage of 5V for 100Hz, 1kHz, and 10kHz square waves show a straightforward waveform for such a simple circuit. For more details, please refer to the blog post: https://ameblo.jp/hirochan-amp/entry-12960425605.html Click here for the manufacturer's site 
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