Musical Fidelity Tube Amplifier Kit - 2.0 / Stereo Tube Amp with 5.5x2.5 Power Interface Plug
Product ID: 153458203
Details
- Item dimensions L x W x H5.12 x 3.94 x
- Voltage12 Volts (AC)
- ManufacturerQinlorgo
- Mounting TypeSurface Mount
- BrandQinlorgo
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Buy Musical Fidelity Tube Amplifier Kit - 2.0 / Stereo Tube Amp with 5.5x2.5 Power Interface Plug: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Low cost good preamp, good for experimental distortion pedals - This kit is not for beginners--you have to know how to read resistor codes, and how to solder. No instructions are provided, the PCB is silk screened with the component reference designator and the value--so you have to follow the PCB closely. The schematic is not provided either, but it can be found online in several places, search for "6J1 preamp". Great value--2 tubes and 2x ceramic tube sockets plus diodes, resistors, etc. Important to note: the power is 12V AC, not DC; amps will not work with DC supply. The amp has two independent channels each with a voltage gain of about 7.5. You can connect the channels in series to get a gain of about 50 which is pretty useful. The plate voltage is around 62V because the 12VAC supply is boosted with what looks like a tripler circuit. This voltage is still pretty safe but high enough to get reasonable gain. I used it as a boost pedal for a guitar amp. It starts to distort on a single channel with about 1.6V peak-peak input, and at 2.5V p-p it starts to clip due to plate cutoff which gives the sound more crunch. If the channels are series connected, distortion is noticeable at about 0.2V p-p. I rewired the grid stopper resistor to the correct place, connected between grid and the grid leak resistor. This makes grid limiting kick in which add some more distortion--what is desired in a guitar pedal but not for a headphone amp for example. Nice low cost platform for modifying to produce guitar pedals. Review: Don't waste your time hums like crazy - You will spend 4 times the price and it still hums. I did every mod I could find. Unless you have some very inefficient speakers.
| ASIN | B07X6LWRYR |
| Best Sellers Rank | #367,152 in Electronics ( See Top 100 in Electronics ) #2,066 in Audio Component Amplifiers |
| Brand | Qinlorgo |
| Brand Name | Qinlorgo |
| Customer Reviews | 4.1 out of 5 stars 11 Reviews |
| Item Dimensions | 5.12 x 3.94 x 0.98 inches |
| Item dimensions L x W x H | 5.12 x 3.94 x 0.98 inches |
| Manufacturer | Qinlorgo |
| Material Type | Tube |
| Model | Qinlorgokdpnqutrh9 |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Package Type Name | box |
| Part Number | Qinlorgokdpnqutrh9 |
| UPC | 739904624530 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts (AC) |
P**.
Low cost good preamp, good for experimental distortion pedals
This kit is not for beginners--you have to know how to read resistor codes, and how to solder. No instructions are provided, the PCB is silk screened with the component reference designator and the value--so you have to follow the PCB closely. The schematic is not provided either, but it can be found online in several places, search for "6J1 preamp". Great value--2 tubes and 2x ceramic tube sockets plus diodes, resistors, etc. Important to note: the power is 12V AC, not DC; amps will not work with DC supply. The amp has two independent channels each with a voltage gain of about 7.5. You can connect the channels in series to get a gain of about 50 which is pretty useful. The plate voltage is around 62V because the 12VAC supply is boosted with what looks like a tripler circuit. This voltage is still pretty safe but high enough to get reasonable gain. I used it as a boost pedal for a guitar amp. It starts to distort on a single channel with about 1.6V peak-peak input, and at 2.5V p-p it starts to clip due to plate cutoff which gives the sound more crunch. If the channels are series connected, distortion is noticeable at about 0.2V p-p. I rewired the grid stopper resistor to the correct place, connected between grid and the grid leak resistor. This makes grid limiting kick in which add some more distortion--what is desired in a guitar pedal but not for a headphone amp for example. Nice low cost platform for modifying to produce guitar pedals.
B**W
Don't waste your time hums like crazy
You will spend 4 times the price and it still hums. I did every mod I could find. Unless you have some very inefficient speakers.
J**N
Does not work!!!
Should have trusted the reviews!!! I have tried and tried to get this AMP to work and like many others it just does not function. Soldering is good, assembly good, just does not produce the specified voltages.
G**B
Perfect warm music preamp
If you have a little knowledge of electronics you can easily build this preamp, audio of this preamp is warm you need to connect this preamp to class d amp for best warm sound.thanks to amazon and seller.
Trustpilot
2 months ago
2 months ago