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| 366 files in 8 albums and 2 categories with 5 comments viewed 403929 times |
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2SK1058 Mosfet Amplifier - Inside1903 viewsSergiy Makharchuk build of Mark's simple DIY Class A 2SK1058 Mosfet Amp Project. Here Sergiy has used light bulbs in place of the load resistor. The enclosure is recycled from an old piece of physiotherapy equipment.
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50L6GT Tube Amplifier481 viewsThis little guy is something I came up with when a friend asked me if there was an inexpensive, but decent vacuum tube amplifier he could build. Well, it is low cost and sounds acceptable, but it is dangerous as one side of the AC line is connected to the chassis. Yes, I used a polarized plug, but it also depends on the receptacle being wired correctly... so I recommended that he should build it with an isolation transformer.
It uses two 50L6GT output tubes driven with a 12AX7A. The heaters are series strung with a 68 ohm resistor to take up the remaining 8 volts. The powersupply uses a 1N4005 half-wave rectifier, so it was a bit difficult to filter out the 60 Hz buzz.
For something cheap, it doesn't sound half bad. Though, it doesn't hold a candle to my 6T9 Push-Pull Tube Amplifier!
-Steve (z-strat)
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Rear View - DIY Class-T (T-Amp) Kit1521 viewsHere is a rear view of the DIY AMP6 T-Amp kit.
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K-16LS Tube Amp Kit with Hammond OPT647 viewsAndy's son put also together a K-16LS Tube amplifier kit with the additional tone control preamp section. He used Hammond Output Transformers in place of the ones which came with the kit. See see his Andy's webpage for more photos and information.
Also, additional information about the S-5 kits is available at the Tube Amplifier Kit page.
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Two Buck Chuck - 50EH5 Tube Amp31 viewsThis is a stereo tube amp that was pulled out of a Philco record player that I paid two dollars for. It uses 50EH5 tubes in single ended mode.
Similar project: Single-Ended (SE) 50EH5 Tube AmplifierJun 26, 2009
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DIY Speakers and DIY Subwoofer 116 viewsI just finished building some budget speakers and subwoofer. Very basic design but that is the look I was after. It is my first project so I kept the components cheap. It sounds quite good considering the cost. Certainly a lot better sound than the speakers I was considering which cost 5 times the amount. Also I had fun and learned a lot along the way.
To get a perfect gloss finish and without the need to bog and sand screw holes, I first screwed the 19mm MDF together and then laminated (glued) 3mm MDF over the top. Next I trimmed the edges of the 3mm MDF with a router fitted with a laminex trimmer. After a light sand the boxes were ready to finish with no chance of seeing any screw holes.
I also made a cabinet to match and used some perspex for the centre panel and sprayed it the same colour as the subwoofer.
I hope this has inspired any budding diy speaker newbies. Im hooked now, im already planning my next project with better components.
BenJun 18, 2009
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OddWatt / OddBlock KT88 Push-Pull Tube Amp Kit79 viewsA finished OddWatt / OddBlock KT88 Push-Pull Tube Amp Kit. This KT88 tube amplifier kit can be purchased from OddWattAudio.com. The tube amp kit comes with a NOS JAN Philips Branded 5751 (US made) preamp tube. The output tubes are and new production Genalex Gold Lion branded KT88 tubes (Russian made). As you can see, the power and audio output transformers are from Edcor.
Complete DIY instructions to build the similar OddBlocks 12SL7 SRPP / KT88 SIPP (Push-Pull) Tube Amplifier are also available.Jun 13, 2009
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OddWatt / OddBlocks KT77 Push-Pull Tube Amp Kit59 viewsA photograph of a finished OddWatt / OddBlock KT77 Push-Pull Tube Amplifier Kit. The KT77 tube amp kit is available from OddWattAudio.com. The kit comes with a NOS JAN Philips Branded 5751 (US made) and new production JJ branded KT77 tubes (Russian made).
Complete instructions to build a similar DIY version of the amp are available on the Oddwatt 225 - 6SL7 SRPP / KT77 SIPP (Push-Pull) Tube Amplifier project page.Jun 13, 2009
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