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The Little Book of Tube Amplifier Projects… By Kevin Kennedy
Paperback: $12.95
Ships in 3-5 business days
A guide to building three different triode based amplifier designs. The first is a 45 DHT based SE amplifier, the second a pushpull amplifier using 6CK4, and the third a pushpull amplifier using EL34... More > triode connected for 16Wrms output. Several of the designs feature regulated power supplies. All use commonly available tubes and parts.< Less
IT Coupled 50 DHT Amplifier Project (Advanced) By Kevin Kennedy
eBook (PDF): $7.50
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A construction manual for the very advanced hobbyist who would like to construct an IT coupled SE amp based on the 50 direct heated triode. The tube complement is a 6SN7 SRPP driving a 71A DHT which... More > in turn through an interstage transformer drives the 50 output tube. The driver and output stage are operated in fixed bias. Power output depending on transformer and operating point is typically 3.5W. This design is intended primarily for use with high efficiency horn type loudspeakers. This design was originally created for a customer in the Far East and the amplifier in question was built and sounds excellent according to the builder.< Less
The Little Book of Vacuum Tube Pre-Amplifier Projects By Kevin Kennedy
Paperback: $12.95
Ships in 3-5 business days
(1 Ratings)
Pre-Amplifier project book using commonly available tubes and easily constructed. Designs often feature 0 feedback topologies (some local feedback is used)and tightly regulated supplies. A variety of... More > line stages and phono stages of varying complexity are featured. The more advanced line stages feature front panel switchable output polarity. (Absolute polarity) Phono stages are all passively RIAA equalized with single stage passive equalization networks.< Less
A Guide To Vintage Audio Equipment For The Hobbyist And Audiophile By Kevin Kennedy
Paperback: $14.95
Ships in 3-5 business days
A guide to finding, selecting, restoring and using vintage tube audio equipment (Acrosound to Scott) from the perspective of the audiophile/music lover as opposed to the collector. Anecdotes,... More > descriptions and caveats for everyday use of this gear. Decription of circuit topologies and classes of operation.< Less
The Little Book of Vacuum Tube Pre-Amplifier Projects By Kevin Kennedy
eBook (PDF): $7.95
Download immediately.
(1 Ratings)
Pre-Amplifier project book using commonly available tubes and easily constructed. Designs often feature 0 feedback topologies (some local feedback is used)and tightly regulated supplies. A variety of... More > line stages and phono stages of varying complexity are featured. The more advanced line stages feature front panel switchable output polarity. (Absolute polarity) Phono stages are all passively RIAA equalized with single stage passive equalization networks.< Less
IT Coupled 50 DHT Amplifier Project (Advanced) By Kevin Kennedy
Paperback: $13.95
Ships in 3-5 business days
A construction manual for the very advanced hobbyist who would like to construct an IT coupled SE amp based on the 50 direct heated triode. The tube complement is a 6SN7 SRPP driving a 71A DHT which... More > in turn through an interstage transformer drives the 50 output tube. The driver and output stage are operated in fixed bias. Power output depending on transformer and operating point is typically 3.5W. This design is intended primarily for use with high efficiency horn type loudspeakers. This design was originally created for a customer in the Far East and the amplifier in question was built and sounds excellent according to the builder.< Less
A 30W 300B PP Monoblock You Can Build By Kevin Kennedy
Paperback: $13.95
Ships in 3-5 business days
A 30W pushpull amplifier based on the 300B direct heated triode output tube. Fully differential driver stage topology, no global feedback, fixed bias amplifier with full voltage regulation. Audio... More > tube complement is a pair of 300B, 6SN7 differential driver stage, and 6SL7 input stage. Topology is long tailed pair. Inputs may be operated in fully balanced or unbalanced mode with no degradation in performance. The power supply features tube regulated B+ and bias supplies. Potential builders should have moderately advanced construction skills, and at least a good DVM for successful construction and debug. Scope and audio generator recommended. This amplifier will drive conventional modern speakers systems quite well. This design was originally featured in a VTV article 10yrs ago.< Less
The Insanity Jeep CJ-7 Project By Kevin Kennedy
eBook (PDF): $8.95
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The story of how I took an old CJ-7 and gave it new life. Details on installing a new body tub, rebuilding suspension and running gear, refreshing the electrical and fuel systems, scrounging parts,... More > getting the whole thing back together and what it took to do it. Similar in tone and content to a detailed blog (predates blogs by 5 yrs or so..)Color pictures of various steps along the way. 34 pages.< Less
LS-1 SRPP Line Stage Project By Kevin Kennedy
Paperback: $11.95
Ships in 3-5 business days
Easy to build SRPP based 3 tube stereo line stage featuring regulated power supplies, and a simple transparent sounding audio topology. Purist design with simple audio path and no tone controls. Tube... More > complement is a single 6U8A and a pair of 6189/12AU7A/12BH7A. This high performance project should satisfy the advanced builder, and yet is simple enough that a careful beginner should be able to complete a unit based on this design successfully. Customizable, and a tube rollers dream. Compatible with a wide range of modern and not so modern audio gear.< Less
A 30W 300B PP Monoblock You Can Build By Kevin Kennedy
eBook (PDF): $7.50
Download immediately.
A 30W pushpull amplifier based on the 300B direct heated triode output tube. Fully differential driver stage topology, no global feedback, fixed bias amplifier with full voltage regulation. Audio... More > tube complement is a pair of 300B, 6SN7 differential driver stage, and 6SL7 input stage. Topology is long tailed pair. Inputs may be operated in fully balanced or unbalanced mode with no degradation in performance. The power supply features tube regulated B+ and bias supplies. Potential builders should have moderately advanced construction skills, and at least a good DVM for successful construction and debug. Scope and audio generator recommended. This amplifier will drive conventional modern speakers systems quite well. This design was originally featured in a VTV article 10yrs ago.< Less