View Full Version : Tubes / Valves
- Schade Feedback
- RH807 push pull ?
- RIAA lite no.ls37
- help I need some addres tube store in amsterdam
- Valve curve tracer gm tester
- 50C5 pentode LTSpice model
- "Iron Garter" Push-Pull Amplifier
- Mcintosh Mc-3500 sound
- A couple of PSD questions
- parafeed - Gyrator vs CCS anode load
- Compactron amp... LIVES!
- Opinions Please
- Aikido REV D pcb
- New Edcor opt, what would a 150ohm primary be used for?
- GM-70, A2, biamping
- Espressivo Headphone Amplifier on Budget
- Coupling Caps for Aikido ACF Buffer
- How to compute current at control grid of power tube?
- High voltage SS output, any experiences ?
- Back on the forum after a long hiatus 6SN7 Preamp project in the works.
- Look for Single Tube scheme
- Cathode follower amplifier, push-pull, xformer-coupled
- help with "bruce heran" el84 amp S2
- Triodes and current flow
- Heaters Constant Current Regulator
- Driver Tubes: Help Me Decide
- Possible tweak
- DHT Driving Pentode Output Stage Question
- 50C5=50l6; 12av6=12at6
- Any experience to drive 805 tube?
- Fixed short in a 45
- power amp current
- Phase inverter/power section
- Concerned with current dual 5U4's...
- What tube is this?
- Signal tube noise!
- McIntosh Goodness From Scratch
- Marshall Amp strange wiring
- Fisher Output Transformer ID
- Stepped Attenuator for Air Tight ATC-1
- Caps .
- The Tube Killer Killer?
- Martel FAX-200C
- 6n6p headphone amp
- 2 caps vs 1 (adding low value teflon to pio)
- Ouput voltage of a triode stage on quiescent state should be zero?
- Hum Ho
- build a OTL (output-transformerless) amplifier
- 6v6 PP maggie with Polk SDA 1C
- Stromberg-Carlson AU-32 distortion in preamp
- Please Help - LF Peaks/Dips & Clipping
- Anybody watching this?
- Trying to find an unusual schematic posted here this Spring
- If you were going to build a OTL?
- Protecting a valve variable LM317 power supply
- EL34 PP PROJECT
- Matching tubes for PP
- Calculate triode strapped characteristics from pentode data?
- 6922 Loading Question
- corrections for LF and HF peaking
- 300bSE journey under way
- Why shielded tubes
- Aikido LV 6N27P SMPS completed
- Tube PS question: Acceptable ripple
- Back at the 45 SET
- Time to replace my 50 year old filter caps...
- Amazingly low distortion -- Radford-based design
- To ground or not to ground the OPT secondary, that is the question
- Ultralinear Observations and Questions
- FEEDBACK DELAY TIME
- 6SN7 v 6N8P v 6H8C
- NOS radio parts awaiting for my pick up!
- Toroidal Transformer Cover
- VTV 6sn7 line stage project
- can something be made using these tubes
- Help! Need tube tester info for 6CW4 Nuvistor
- Hampton MC preamp
- J-fet - tube DAC analog stage
- geloso 3270 power amplifier
- Belton micalex tube sockets any experience ?
- DeathTrap 500™ - An Engineer's approach to the 300B SET
- My First Power Supply
- 5aR4 Rectifier Problem, Help! Little Long
- Electrolytic vs Polypropylene cathode
- Size of 5Y3 tubes?
- 3C24 really is a fine output tube...
- Yaqin MC100B Newbie Questions
- JE simple 45 SE grid leak resistor question
- 26 vs 27
- Bypass the tone control
- CCS with VN2222L
- Adding a ground with a 3 prong cable and connector
- European Made 6080/6AS7
- PFL200, what can I use them to?
- 7W7 tube - how it competes with other pentodes as driver?
- 1959 Blaupunkt receiver capacitors -Newbie
- i have one 5672 tube (new)
- 12ax7 pre amp + solid state power amp
- Preamp for Tim Mellow's 6C33C OTL
- Power supply buzz
- How to make a PCB with 15 years old Positiv 20
- Circuit query
- 845/211 driver circuits
- A question about the Malanz 7
- Looking for four KT90 Ei
- Dynaco PAS transformer breakdown
- where do you find your tube treasures
- 5670 Thoughts?
- looking to build or buy a cheep preamp
- Trying to achieve 25-30 watts... help please!
- RCA Reel to Reel Conversion??
- AA5 Tube Radio Design using 2010 Techniques
- I found a use for surplus tubes
- Edcor CXPP-30-MS-3.8K OPT
- Which tube does my amp use? 845 or 211
- Coupling cap replacement in series?
- electronique practique
- New PNP HV tranny for anode CCS
- tube reliability
- Hybrid dreams
- Triode Electronics 30W SE Transformer
- SMALL SIZE OUTPUT TRANSFORMERS
- headphone amp with 7025?
- Separation of preamp and power amp
- Aikido 9pin with 6n1p and 6n6p as Headphone
- PreAmp output transformers
- Line-out on tubes
- Would this scheme work ?
- differential cascode patented in 2007
- Question about AMP185 Rectifier Circuit
- correct heater wiring
- Speaker snap or crack (no pop)
- Very long cables
- Help! 2A3 SET quit after hot restart
- INTEGRATED HYBRID AMP WITH NO LOAD
- ECC88 symbol problem in TINA-TI
- 12AX7 preamp on 375V
- The Blue Velvet Line Preamp with 7193 instead of 6SN7
- Increase idle current on my KT77's?
- Yet another nutty idea - don't say I didn't warn
- Need help calibrating a Hickok 6000 Chicago
- need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
- Building an B-15-inspired amp
- China preamp Xiang Sheng 768A
- RE: Fisher 200 tube amp fuse blowing issue
- How do you match output tubes?
- Best Dyna ST-70 rebuild kit?
- Help with tube wiring
- Decided on Gibson GA 20 need layout drawings etc.
- st70 problem
- Help with info on old valve amp
- Exceeding V-heater-cathode
- Cayin/Sparks A- 50T schematic.
- Looking for Bi siemens datasheet
- Transformers, transformers, transformers...
- Need ideas for my 6V6 from 1946 Blues / rockabilly
- Quasi complimentary output stage?
- 4ohm output transformer with 8ohm speaker
- First DIY project for a good power Amplifier
- Cherry red plates
- DIY triode
- First post/build
- New Transformer Vendor In Belgium
- KT88 grid stopper
- Connecting valve shields to earth
- Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
- Fixed bias failure B+ switch off protection
- Who can tell me where to buy Caddock MS220
- Uses for Quicksilver Transformers
- SE amp problem
- EL-34 to 6P3S-E
- 6922 sepp with Balanced Gains
- What path to choose for Hamonica amplifier?
- tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
- Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
- gridchokes/output caps
- Can I build an MC30?
- Cathodyne: Can someone please help me fill in the blanks ?
- help hovland hp200
- 6SL7 and 6AS7 PP amplifier, design advice needed
- Project: Baldwin Tube Amp...
- Power Supply Input Capacitor - JE simple 45 question
- Tube output: Voltage or Current source?
- Edcor's new E-store website.....finally!
- Help complete the 300B schematic
- Confusion about a 5Y3GT rectifier
- Need advice on 300B circuit
- PCB in components
- new 6080 dc pp
- Single ended to balanced Aikido with mosfets in buffer position
- Simple LED power indicator light circuit?
- about 83 mercury rectifier
- Aikido Zo Calculation
- Line out issue - 1965 Ampeg B-18-N
- Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
- Is this Telefunken fake or OEM?
- About Hmmmmm
- PRE-AMP PROJECT SRPP + HEADPHONE AMP
- 6BN11 vs 6CB6
- Is output stage local feedback necessary?
- Tube Longevity
- Power triode drive current requirements
- OPT Selection Question
- Recommend me a 6V6 P-P schematic
- Requesting advice on a pre-amp build. I'm working on asking realistic questions.
- So, im going to replace the Alps with a PEC...someone help?
- 13e1 se "shade" some questions
- Pio russian capacitor K42-11...is good ?
- My first build VTA ST-120
- World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
- DIY 50C5 mini amp...
- So you think you have cool tubes?????
- Layout
- Looking to ID this amp
- Help me to make tube amply
- CAT SL1 SIGNATURE schematik phono
- Have anyone built this 6V6 amp?
- GU-50 in Single-Ended Triode Configuration - What bias points?
- DC coupling on a LTP? Opinions and help needed on Fred's design.
- Power Selection - Help Needed
- Which speaker with a 1/4W tube amp?
- 6973 VS 6CZ5 substitute
- Third Reich tubes
- Hello...and another ST-70 project.
- Home theater magic smoke...smoked and I think I heard a mirror crack...
- Scott LK48-B restoration
- 3 - 12AU7 Preamp. Is there such an animal?
- 300b filament
- resistor 880 ohms cathode
- Anyone have a Bugle Boy logo
- Change of circuit from triode to tetrode
- Need upgrade info for my Atma-Sphere Novacron Amps
- Whats Vintage Testing Equipment Do YOU Have/Use?
- JJ Kt77 Bias?
- tube rectified psu
- HELP!: my SET amp was turned off without a load and now it sound veiled!
- 5842 grid leak
- AMI Jukebox speaker impedence question
- Advice Needed: "Flabby" Amp Low-End
- Aikido transformer coupled output
- Audio measurements on tube amp. ? look here
- 12BH7A driver stage help
- Audio drive to g2 connected to g1 via 15K0
- KT88 SE Complete Kit
- Any high-end 6BM8 push pull tube amp schematic ?
- How a Triode Works
- EL3N substitute
- Magnavox AMP-185
- Best 6V6G that won't get me divorced..
- Shorted EL34 ?