- Over 500V rated electrolytics?
- Fireplug? (inline fuse)
- Help! Flash-over on my amp :-(
- 6550 drive question
- 4211D Amp?
- Please, reccomand me about 7233 GE NOS
- Help! Schematic Conrad Johnson Premier 3
- Tubelab SE in parallel?
- Just an Idea?
- Tried this out, but needs more gain. . .
- EL34 Power Stage
- Daven Question
- How many rectifiers can have mesh plates?
- Real Quick Question!!
- Wattage of vintage resistors ?
- What is the signal path -- the red line?
- Hi-end definitive vacuum tube phono pre
- Resistors for Stepped Attenuator
- dual rectifier clone....
- Motorola Console Salvage
- single endedtransformer coupled 6sn7 mic preamp
- Brett's 12B4 schematic?
- insulated turret terminals
- Building first tube power amplifier, reccomendations?
- Can you use a MOSFET as a cathodyne
- Resolving cold midrange in 5687 circuit
- 829B SE Comments????
- Shielding and regulator location in the KTA 26 preamp
- Voice of music, antique or reproduction?
- Quick Question - Audio Note M1 or AR SP-6?
- Red Light District/Baby Huey (EL84 P-P) Output Iron
- help with PSE design
- Tantalum VS CC & metalfilm
- Rise-time question
- Have an odd problem with my Aikido.
- Weird Hybrid Splitter (equal impedances?)
- Tube 6550 to test
- Using semiconductor curvetracer for tubes...
- Question regarding 3rd wire grounding and safety
- Plate Current VS Plate Voltage Graphs
- Toggle Switch Contact Type and Rating
- Inside information on Shuguang
- 6N6P vs. 6N6P-I
- Technical Survey Paper -- Need Some Help!
- VOLTAGE DOUBLER : drop in current?
- Using genetic algorithms to optimize pentode parameters
- Favorite size wire for signal wiring?
- Any idea what this thing is?
- Breadboarding Poindexter's 6GK5/EL34 Music Machine
- anyone ever use el86/6cw5?
- bad 5ar4?
- 6DJ8 biasing question
- Is it worth using anything other than DHTs for preamps?
- Billington Export Ltd Tubes?
- 845SE : comments on this circuit?
- Tip-Restoring Vintage Pot
- B+ Delay - Is this a problem?
- Toroids in SET
- I have to sell my Pyramid-V prototype...
- Stealing a preamp
- OLD GOLD, or something I can dissassemble and use
- CF PP design
- Preamp Idea
- Metal Oxide Screen Stoppers
- Splitting up power supply inductance
- Back to Back transformers and safety ground
- Vintage tube tester
- 7 pin ECC81.
- 26 Driver Tube for 45 - Operating Points
- My New pre-amplifier£¡
- Echocord Super Question
- High quality matching panel meters?
- 6BY5GA question
- Seeking schematic for Conn organ amp
- Will this work as a differential stage?
- Tube ID and suggestions
- 6L6 to EL34 conversion
- my saturation test ??
- DO-35 diode inside vacuum tube ?
- Transformer Polarity
- Modular Gain Stages for Tube Guitar Amp
- Where to go for tube gear in Hong Kong?
- EL84 Shunt reg for pre-amp, 85A1?
- Tube Preamp Idea
- UTC Linear Standard High Level matching transformers
- Manley Compact 160w noise problem -please help
- D3a Experimenters Breadboard Project
- Dtmm
- Running Single Ended 6V6 in Triode Mode
- 6v6pp Finished
- Stereo Buffer with a single twin triode
- Marshall volume drop off help
- Anybody recognize this pentode?
- Original schemes of amplifiers for 45 tubes of 1920 and 1930 years?
- My new amplifier£_300BSE!
- low zout vs output transfo
- can't find valve art tube - and glowey tube pic
- Which Phono Pre???
- EICO HF-20 Guitar Amp Convert
- BB 1702 DAC + transformer I/V ?
- aikido build thread-
- Triode Connected 6BK5
- need help in building tube amplifier 10 watter
- Parasitic oscillations in general
- Help Russian tube experts.
- forced aircooling
- Dirty Cheap Vintage Pot Fix - Your Opinion Please
- ask jan first
- running 6S4S/6C4C hot .. calling widowmaker
- An Odd Duck -- Gibson BR-6f Guitar Amp
- Covi Mark II OTL Help
- Volume pot between triodes?
- Series Pass Transistor for TL-783
- Anyone else have the new Mullard EL34's?
- VR tubes in single ended circuits
- Transformer for Tube Amps?
- "Magga Amp Workshop" builds again (Simple 45 Project)
- How to handle Reclaimed Transformers
- Dual supply...
- How much would this cost/how complicated would this be...
- low cost DHT hum pots vendors?
- Tube Buffer – question?
- Bogen CHB 10A questions
- 12B4 Preamp
- adding output tubes etc to pre amp
- primaluna dialogue 5 and fanboys?
- yaqin mc-100b
- KT88 in place of 6550?
- Tube manaul data sheets
- Need a bias supply how??
- Wouldn't you just love to have these!. United Electronics 211's
- Using single tube of Dual
- 21st century tube? Non-Vacuum
- making two minibloks for stereo
- Lynn Olson Raven Question
- Inrush current limiting heater filaments
- Tube amp with "meter"?
- lytics and choke AFTER regulator
- Boosing the power of your existing amp.
- Component ID from a 50EH5 Amp
- Music Angel KT88 Bridged /Bias problem
- Output of preamp drops when overdriven
- Choke load calculation...
- 807 SE amp schematic
- DC Heater Voltage
- Choke loading vs. SRPP
- Unloaded Power Transformer Current Draw/Janus-Aikido snipet
- Need help with tubed output for PCM1793 DAC
- Single ended transformer grounding question
- Reforming Caps with Variac
- First Shot at a 41 SE amp
- [Question] Ground Error?
- TOMIKO OPT-SE, any good?
- 6550 Williamson - Low Bass Response...
- Preamp design question
- Reading Oscilloscope Traces -For Dummies
- Power Supply Question
- PI Question Guitar Amp Related
- Altec 1568A modifications for comments and help…. again
- H & K Tube 20 unruly gain
- Electro-Harmonix interview
- Using LED bias for 4.5 mA cathode current, is it a good idea?
- amp dead?
- 7189 vs EL84 +458v plate
- What does your Aikido drive?
- Help with Decware SE84 Kit!
- Hybrid Amplifier in Small cases
- audio mixer with tubes?
- Epiphone Galaxy 25 transformer problem
- Help with KT88 biasing
- Bad Schottky??
- Aikido Diagnostic
- Could this become a Baby Huey killer ?
- SV83 vs EL84
- KT88 PP-5 Monoblock Amplifier
- RE604 SET amp
- Dropping rectifier filament voltage
- need suggestion about MC pre-pre
- New gain stage .. Opinions???
- Using SS to augment < 100Hz?
- A help with an soviet transformer.
- I thought that I had seen everything
- Triatic PP-amp with 6p14p
- Single 6N6P stereo pre-amp
- Tubelab SE input tube filament
- high frequency oscillation and decoupling question
- Long tailed pair schematic questions
- CCS Kit options
- Variac Question for Thatch_Ear
- 13e1
- Rogers Tube Amp
- Pair of McIntosh MC-60 on Dallas Craigslist
- Lundahl LL1517. What is it good for?
- Edcor OPT Voltage Rating?
- Which Tube to Start with?
- Basic Transformer hookup wiring
- Beta followers, biasing.
- 6W 2xEL519 Half-hybrid Class-A OTL
- Can a Class AB PP amp be said to be operating in Class A at low signal levels?
- Wiring / Layout question
- Yaqin MC10K
- help me lower the gain of this preamp pls
- How to wiring the transformer
- "universal" P-P driver board
- series or parallel?
- Question about Cathode bias in this Magnavox amp. . .
- GK71 B+ turn on delay
- Paralleling Triodes in a 6SN7GT
- 6C33C-B. PP or SE ?
- 6550 Triode B+
- Aikido Phono Pre.....any good???
- Tube Preamp L&R Channel different current draw
- amp is dead!
- What you think about Ayon Audio Spark SE 6C33 tube 22 W
- Running stereo through a single tube with dual triodes?
- Looking for 6AQ5 audio preamp schematic!
- Quad KT88 oscillation problem
- El86 driving high beta bipolar power tr
- Wikipedia article: Tube sound
- Installed 12" Speaker in Pro Jr---Now What??
- How do I design a pentode constant current source plate load?
- Socket for 6AQ5
- new 845? Who produces it?
- Looking for a 45 SE Schematic
- Counterpoint SA-12 outputs 2SK134/2SJ49 work??
- Tube Amps left outdoors 24/7
- The beast OTL
- Input transformer: floating input = distortion
- Altmann's Split Feedback concept
- preamp for a JE LABS 2A3DX amp
- Phase flip needed -Interstage Transformer?
- Can your amp do this?
- AES out of 1625?
- Any info on Haltron 6BL8 tubes?
- Need Schematic for 12 Volt Tube Buffer
- Input impedance for Simple SE?
- SR-101 Pioneer Spring Reverb
- Basic Transformer Question - how do I know build possibilities?
- Source for 2.5VCT 5A filament transformers
- Nichicon VR VZ or GU
- Missing 6.3V CT/'Cockeyed Bridge' problem
- Best plate voltage for 6dj8 at +-6ma
- Max supply voltage for small DHT's
- Operating Temperature of KT88?
- First Tube Amp
- earthing advice on a US amp
- distortion at low volume
- interstage transformer cheating?
- PP EL34 or 6L6 circuits?
- Rectifier Capacator (voltage adjust)