World Audio Design 6550 | Audio-Digital.net

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World Audio Design KIT 6550 & KAT 6550 JJ Full Revalve Kit

https://www.watfordvalves.com/product_detail.asp?id=3552

World Audio Design Ampllfiers / World Audio Design KIT 6550 & KAT 6550 JJ Full Revalve Kit. World Audio Design is an excellent range of Audio amplifiers that come in kit or full made format. Many readers have enjoyed the huge improvements made to these fine W.A.D. kits simply by fitting specially selected valves.

Test Reviews - Watford Valves

https://watfordvalves.com/cgi-bin/documents/testreport_42.pdf

6550-EH/SOVTEK: The 6550 EH has been in the market place for a few years and comes in a very nice coke bottle type glass envelope. The bass response was well extended with musical detail and bass runs easily and accurately displayed. The valve also had a very large soundstage which made the sound sparkle and kick into life. The midrange was a little

World-Designs-Forum - Powered by vBulletin

http://www.world-designs.co.uk/forum/login.php?do=login

For discussions re World Audio Design. Kit 6550 refurbishment,... by B Perry. 21st October 2021 06:28 PM. 441: 5,949: WAD Problems (4 Viewing) For questions and answers re older World Audio Design Projects. Kit 6550 resistor failures... by bob orbell.

Tung-Sol 6550 – Upscale Audio

https://upscaleaudio.com/products/tung-sol-6550

Tung-Sol 6550. A current re-creation of the classic original 6550, now made in Russia. Super dependable, works well in most all applications. We burn them in for 72 hours, check for excessive current draw, all that good stuff, then match each tube in circuit at real voltages. We've been using these in a variety of amps here with fantastic results! Because of it's superb test …

PP2012 - KT88 Hi-End Push Pull Amplifier - Audio Design Guide

http://www.audiodesignguide.com/PP2011/PP2012.html

6550: KT88: Power max: 25W: 42W: 42W: Anode voltage max: 800V: 500V: 800V: Screen voltage max (G2) 400V: 440V: 600V: Cathode current max: 150mA: 190mA: 230mA: Internal resistance in triode conf. 1250ohm: 1000ohm: 1000ohm: Price medium each (euro) 15: 27: 30

Auris Audio Fortino 6550 integrated amplifier - Hi-Fi+

https://hifiplus.com/articles/auris-audio-fortino-6550-integrated-amplifier/

Vacuum tubes: 4 ×ECC82, 4×6550. Load impedance: 4 Ω and 8 Ω. Frequency response: 17 Hz–30 kHz (± 1,5 dB) Output power: 50 W. Input Impedance: 100 kΩ. Dimensions (W×D×H): mm 450 ×400 ×270. Weight (kg): 19.5. Price: £4,795. Manufacturer: Auris Audio URL: aurisaudio.rs. UK Distributor: Elite Audio Distribution. Tel: +44 (0)1334 570666

Electro-Harmonix 6550 – Upscale Audio

https://upscaleaudio.com/products/electro-harmonix-6550

Electro-Harmonix 6550 This is a great tube. Again, we are very conservative, having seen the "hot new tube" being to too cool. These have been tested in real-world conditions and they have proven to be a great tube, so you can relax and get back to playing your Norman Greenbaum. Pricing above includes matching in any quantity you need at no extra charge. All power tubes are …

Audiogon Discussion Forum

https://forum.audiogon.com/discussions/best-modern-6550-tube-for-arc-per-amp

you do realize that the audio research ref 6 linestage uses its single 6550 tube as a voltage regulator in the power supply section, feeding the 4x 6h30p controlled gain section, right? this has been the case since the ref 2a model... where the power supply/regulation circuit incorporated a single 6550

DIY and Hi-Fi Audio Schematics - DIY AUDIO PROJECTS

https://diyaudioprojects.com/Schematics/

SE 6550 / KT88 Tube Stereo Amplifier Schematic (6N1P input) - [4 Watts, SE, class-A, Triode or UL] - (Project) SIPP 6550, KT88, KT90 Tube Mono Block Amp Schematic (5751 SRPP input) - [25 Watts, SIPP, class-A, UL] - (Kit)