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Tube Amp Community (Hi-fi too!)
Forums on designing and building tube guitar amplifiers, hi-fi amps and accessories.
Forum Threads Posts Last Post
Q&A regarding Kevin O'Connor's "The Ultimate Tone" book series
29 205 Cathode Bias Rk Recommend...
03-25-2024, 11:21 PM
by makinrose
Power Scaling
Discussion of London Power's Power Scaling methodology
11 63 Power Scale pot sweep
05-28-2024, 12:57 PM
by K O'Connor
PCB Design
7 57 Schematic management
11-21-2022, 01:39 PM
by K O'Connor
Power Supplies
20 116 Hammond 290-series Guitar...
12-31-2023, 08:25 PM
by K O'Connor
Power Amps
Design and modification of audio power amps
7 22 SEM Mod on a 5f6-A
05-28-2024, 08:14 PM
by K O'Connor
Preamp Mods & Design
27 206 D-PRE BUILD ( mini marshm...
04-10-2024, 11:57 PM
by K O'Connor
Sag & Sustain
3 14 What is sag?
12-31-2023, 08:58 PM
by K O'Connor
6 38 Pentode/triode switch
06-02-2024, 09:10 PM
by jmcd
11 92 Suitable Shoulder Washer ...
03-06-2024, 01:09 PM
by ZeusMC
Personal Projects
29 323 Bogen CHB-20A Rebuild
Yesterday, 05:43 AM
by physics
Test & Measurement
Testing your project and test equipment selection
18 60 Oscilloscopes for Audio
05-31-2024, 08:20 PM
by K O'Connor
New Member Introductions
You are welcome to let forum members know more about you! We're glad you are here.
31 82 Hi All
05-30-2024, 04:33 PM
by Linke

Forum Threads Posts Last Post
London Power Amps & Gear
0 0
London Power Kits & Mods
14 124 RBX Question
07-30-2023, 11:18 PM
by K O'Connor
Gear for Sale by Forum Members
5 9 Gone (FS/T): 100W Carvin ...
12-23-2023, 01:52 AM
by physics
Vendor Info
Post here if you sell parts or services of interest to audio builders/hobbyists
2 4 Speaker Repair Pros testi...
07-19-2023, 08:14 PM
by physics
Miscellaneous for Sale
Selling roosters, hammocks or shoe-horns? Post them here.
0 0

Recording & Playback
Methods for recording musical performances and playing them back
Forum Threads Posts Last Post
Recording Methods
How to record a live performance or individual instruments
2 9 Warming up the sound
01-21-2024, 01:19 PM
by K O'Connor
Headphones for Music Playback
Discuss the types of headphones and their merits for music playback
1 4 Headphone selection
09-07-2023, 02:19 PM
by K O'Connor
Playback of Recorded Music
Types of playback systems for listening to music
1 1 Ideal playback system
08-31-2023, 12:45 PM
by K O'Connor
Specialized Headphone Amplifiers
Dedicated headphone amplifiers for music playback
3 3 Headphone amps for dynami...
08-31-2023, 05:28 PM
by K O'Connor
Stereo Playback Systems for Music
Components of a stereo music playback system
1 1 The rule is: There are no...
08-31-2023, 05:58 PM
by K O'Connor

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Come in where it's warm!
A warm welcome to tube amp modding fans and those interested in hi-fi audio! Readers of Kevin O'Connor's The Ultimate Tone (TUT) book series form a part of our population. Kevin O'Connor is the creator of the popular Power Scaling methodology for amplifiers.
Please remember these three principles: respect, sharing, community.
Not familiar with The Ultimate Tone book series? See discussion topics, or click here to visit London Power/Power Press Publishing.

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