Tube Amplifier Kit, DIY Tube Preamp Kit, Tube Preamp, DIY Amplifier Kit, 6j1 Vacuum Electron Tube Valve Preamp Tube Amplifie Board Headphone Amp Parts Musical Fidelity Kit DIY Electronic Kits

Outstanding! My love for kit building started in 1963, when I was young and out to prove that a woman could do anything. Not being overly domestic, I quickly developed a love for soldering. I've soldered on stained glass...built an Heathkit stereo FM receiver, a small FM radio, and now this pre-amp. It took a day to build this pre-amp, and the end result is awesome. Coupled with an inexpensive amp I bought from Amazon and a couple of small speakers, the sound is amazing!!! Although there were no instructions, the pcb was well marked so no written instructions were needed. If you're looking for a fun project, I highly recommend buying this kit. You won't be disappointed.

Great for getting the hang of audio circuits. It's very basic, implements pretty much all the parts to 99% of one channels audio amplifiers. Wish it would go into a bit more detail but I guess you get what you pay for.

The media could not be loaded. 3/5 because image depicts a case which is sold separately and a lot of people probably dont understand they will need a 12v AC source, which is uncommon.Price point is fair, however. Good project and worth the money.Appears to function under test. There are some tight solder points (pot) but board is well labeled. No schematic needed if you pay attention. Make sure the diodes are properly aligned. Capacitor C9 was out of spec with the board label, but in the right direction. It's okay to use a higher rated cap. So, it is still functional.Recommend a good ohm meter to test resistors as installed.

Did great job will jam for years thanks guys

My kit arrived missing the 4 1uF capacitors. I didn't realize until I had completed half the kit, so it doesn't make sense to return. I wish there was an actual bill of materials / schematic so I could order the correct capacitors, but there isn't . I will have to make a guess.

Not the easiest build due to no instructions or schematic but sounds great for the price.

Bought this as a gift for my nephew, he was supposed to learn about soldering and electrical components with this build but unfortunately he was very upset when you found out it was missing the most important pieces. The vacuum tubes. So unfortunate. I really hope the better could get back with me and help me get the figured out.

First off the plastic case is sold separately which was a slight bummer. I did end up buying one.I tried running it initially off DC 12v which is what most power adapters are. Was quiet and distorted. Figured out I needed 12v AC and got the correct adapter and it worked.The 2 best cheap mods I have found:Either replacing R14 and R19 with 100ohm resistors or just soldering a 220 ohm resistor on the underside of those supplied two resistors. This slightly opens up the sound stage and raises the volume some.Replacing C10 and C12 with 10uf caps or just bridging the originals with 10uf caps does really help the bass response like another review said.Also getting a matched pair of GE tubes helps improve the sound over the cheap ones supplied. This will cost you about as much as the kit though.With a nice set of headphones this little preamp does sound quite good. That resistor mod to R14/R19 really helped give the volume I wanted on my headphones. They are 40ohm speakers and I doubt you would get near the needed volume on any headphones of much higher resistance.