View Full Version : Tubes / Valves
- 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 ?
- ARC VS60 hum in speaker
- Need help for a bias circuit
- Eico HF20 Output Txr Questions
- A Radford STA15 restoration story
- Tube Testing in DC Area
- Thorens PR24
- Newbie here with a couple questions
- 300B SwitchMode filament supply
- Mixed bias for balancing unmatched tubes in PPP?
- My First DIY Experience: An Aikido/Tetra Preamp
- how to test chokes for current and voltage
- pictures miniblok 1 and miniblok 2 by fred nachbaur
- Help with Aikido Preamp+class d amp
- will a PTX without center tap work?
- Anyone have information on 300B silvertone tube
- 6P14P push pull with low output
- passive 30Hz-20kHz Bandpass filter for tube preamp?
- My First Amp
- Frank's 6sn7 preamp
- My new 300B Amp
- help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
- Tube Gear Supply/Surplus in Houston Area
- What 2a3 ?
- long tailed pair - need more gain
- how to bypass the volume pot on my SET amp?
- 2 stage AIKIDO
- Guys please help me with my Jolida 102B!
- Philbrick GAP/R K2-W question
- First time baby Huey amplifier build
- 6LB6's....
- LMG Capacitor
- Meng 6PI Biasing Question
- AIKIDO LV WON'T START
- Under rating of Vertical Sweep Tubes
- Simple 845 tube monoblock design
- Running on filament only
- soft stat
- BJT Bias?
- Preamp Squeal
- Hammond L101 compensation cap
- Powering a headphone amplifier with DC filament supply
- new to this
- miniblok 1 voltage problem
- How will this affect my amp?
- Tetra Phono Builders...got problems!
- Parafeed C3g + 300B
- Base material of GEC KT88 Feb 1960
- Headphone amp with 6n2p valve on 12V
- pcc189 for audio use
- Reading material
- 2A3 rectifier
- help calibrating a mercury model 1000 tube tester
- 866a valve test
- Anybody in the Knoxville area?
- Looking for simple Push-Pull tricks (from Baby Huey) #1
- Why wire an output transformer as autoformer ? (parafeed)
- Measuring unwanted grid current
- Tube companies
- heathkit a7???guitar amp
- Hi Performance Pre amp
- HH Scott Type 209 Amp
- 6l6gb PP w/fixed bias?
- Holy cow! Can anyone tell me why this wire is so pricey?
- EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
- 4 x EL84 in UL PP, 470 B+!! is this right
- What amp is this?
- PS Setup For Testing
- OTL designed by Tim Mellow with 4 6C33C?
- Bassman 100 schematic questions
- Quick question on this schematic
- Variac, how to ?
- Tube data sheets - inaccuracy
- Benny's new ForeWatt SRPP pre amplifier
- OddWatt PP UL amplifier from scratch
- OPT Impedance
- Rectifier Valves
- WE311 amp
- Sherwood S8000 transformers
- yaqin MS-12B Search for Diagrams
- EICO HF-30 - Schematic
- 12AU7 Phono Stage
- How to install a motor run capcitor
- Sanity check on B+ regulator
- 6B4G PPP idea
- First OTL breadboarded
- New amp build
- Tube Parametric EQ - Idea looking for clarification
- Peavey Valveking 100- static sound during warm-up
- My Fender Twin Amp Not Working - get your guesses in
- DHT heater supply
- MC/MM Phono Pream PCB
- Help Identifying Old Westinghouse Tube Amp?