View Full Version : Tubes / Valves
- Need to run heaters in output tubes, remove plate and screen safe?
- 1AG4 Direct Heated Pentode, Output
- grid stopper and grid choke on pentode input
- unusual noise on AB763 Super reverb clone
- Has anyone tryied the GuiGuang 300B?
- Honeywell Mercury Tube?
- Tube audio-phoolery -- more teats on bulls
- Strange tube
- Adding a Headphone output to my amp.
- 6CG7 Phono/ linestage
- RH84 Build from old Dumont console
- 6N16 12x preamp srpp/cathode follower with printed circuit board design.
- Long Tail Pair
- Hickok 752A 5AR4 rectifier test?
- Shunt Capacitance in Output Transformer
- LTP vs single first stage
- 6n23 v. 6dj8 v. 6fq7
- newer than noob looking for advice on RH84
- 300B failed again
- No output transformer tube amp
- curious about a curious connection
- tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
- My new "vintage" tube radio
- help designing 6L6G S.E. amplifier
- SVT output iron as single ended
- is 6s2p actually equiv to 8532?
- Grundig H&B 6007 tube power supply - Repair or gut for parts?
- Quad 22 stereo balance/ filter problem
- KR 2A3: problems?
- Philco F-1801
- KT88 Stereo Schematic and help
- Where should I connect ground reference for heater supply?
- Chassis size and layout question
- May tubes amps
- 12SX7 coin base tubes? Fake?
- Toroidal transformer on tube amp
- Current Mirrors in a balanced preamp
- Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
- High-end Tube amp kits (all-included)
- High Current Maida
- High Current Maida
- Balanced tube preamp schematic or kit?
- Trying to find tube component supplier, lost webite ...VT42.com or something like it.
- 2A3 PP Can my OPT do the job?
- 1626 / 6j4 tube amp
- suggestions for driver tube for 2A3
- Does anyone know the specs for this Chinese pentode
- SiliconRay Kits
- Advice needed for hum reduction
- low voltage dc tube phase splitter/12AU7
- Damper rectifier tubes & voltage doubler
- Overheating Resistors on DAC board- "HELP NEEDED"
- opt primary inductance and secondary load
- SOS-HELP-AIDE-HILFE on " DAC dilema"
- Transformer Mounting Direction
- HELP! new to working on tube amps and need help with project im going to take on
- Fisher 500c radio hum
- Modify Power supply for Tube Amp
- Unusual amps..
- Anyone make a guitar amp from an EA-3?
- Help with Preamp/Amp hum
- Question about step up in 300B PP amp
- How do we reach PMillet?
- Please help me with a few questions and a idea for an old PA
- nos 5y3wgt in 5e3
- Edcor CXSE25-8-2.5K single ended UL transformer
- Voltseconds ccs for the K-12 kit
- The Torpedo Parafeed Headphone Amplifier
- Tube Rectifiers do sound different
- 6922, a 6DJ8 replacement??
- QB2/250 amplifier
- WE 350B and 311A
- Single ended 300b's
- More power!
- How the magnetic affect the sound of tube amplifier
- Valves replacement for Copland CT402
- Changing valve damage
- Tube phono preamplifier by 12ax7
- Altec 353A oddity
- I need to lose that Hummmm
- Reduce B+ with zener
- Old Marshall plexi clone problem
- triode and pentode 6v6 in parallel
- How to make mic input transformer 150:50KCT for mic tube preamp???
- Webcor 12AU7 is it a Mullard?
- Everett AO48
- Resurrecting old tubes
- Lumley ST70 Output impedance change and other questions
- AC Heater reference to B+
- Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
- Overly complicated 1.6A CCS Heater Supply
- Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
- Tube/Valve buffer with ECC88
- High(er) gm octal pentodes?
- Shielding Characteristics of Copper Clad PCB
- Starting a Meixing MC34-A07 modification project
- 6V SLA Dropping resistor for a 5VDC Filament Supply
- Wind (Thermionic?) noise, and other strange sounds
- Suggestions for an tube-amp with KT88
- SE-100 Golden Tube Audio - REPAIR
- Power amp vs preamp topology
- EL34 Characteristics for Ug2 400V
- old Heathkit amp
- Toroid OPT for 300B
- Help: Connecting two Fluke meters in series
- Preamp Volume Controls
- Output SE Transformer Question
- Vintage electrolytic capacitors
- Silver bearing grease for tube sockets
- Should I try adding a small Tube Preamp to a DTA-100?
- IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
- Dynaco stereo 70 look alike
- Vacuum Tube factory: For Sale!
- Does anybody know anything about this German console
- Heater dillema for multi chassis phono stage.
- Q: lifespan of JJ ECC99 tubes
- Cold solder joint?
- My Experience with a Jolida 202s (SoFar..)
- Input Impedance/Buffers
- Old capacitors..Comments..
- Shizuki capacitors?
- Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
- Amperex Orange Globe 12ax7 ,Brimar cv4004
- Question about transformer lamination stacking techniques
- line preamplifier with 6c10
- Homebrew Toroidal Output Transformer
- Line output tube
- MJK's SSSchadeode
- Any one know were to buy the fu-80 tube?
- Maida Regulator PCB
- Suggestions for 7k output transformers.
- Help: Fluke 87V Meter Calibration
- Searching for Primaluna Prologue Three schematic
- JCM Build - Hum and Crackle
- Silvertone radio to Guitar Amp conversion question.
- Pentode Regulation Question
- pentodes with CCS load?
- Are these tube PCBs any good ?
- china 6L6 SEdiy
- What are your opinions of the ST-70 and St-120
- Baffle Step Compensation Tube Circuit
- 6L6 to 7027 cathode resistor value
- PCB to mount snapmout electrolytic capacitors
- Dared MC-7P Upgrades
- adapter to go from 6L6 to 807
- Tube Rolling a Jolida 202a
- Cathodyne gain calculator link
- Dynakit ST-35?
- PSUD modeling old amp PS fails.
- Fisher 800 push-pull output stage not symmetrical. Why?
- Question of D3a driving 300B
- old console amp
- st35 vs millett DCPP vs tubelab simple SE
- New Tim Mellows OTL project
- Melted my mains transformer - Where to find replacement ?
- Strange.................
- Effect of high mains voltage?
- Kent SL 21 Tube head need help!!
- Hexfred or SIC rectifiers in choke supplies
- 'Strange' bass boost with impedance transformer
- Did my tubes go south ?
- Use of Tango NN-600-600 Transformers ?
- Anyone have an explanation for break(burn)in
- The Right Tube & TRannie
- 6SL7 / 6SN7 Phono
- Tube integrated amp in China.
- Power supply issues with Borbely style 12AU7/MOSFET hybrid
- heater elevation ground point
- Edison 12, can anyone help?
- Delay B+ using relay?
- New Schematic Linestage Tube Preamp using EF86 & 12AX7
- Phonostage (WAD clone) and 12B4A Preamp Build
- Interstage coupling feedback
- Just received a Yaqin MC-10T and have a couple of questions.
- Amplifier Troubleshooting
- Audio Preamplifier with PCC88
- Need Help With These TriodeDick Preamp Scematics
- I need help with my amp project
- Looking for unbalanced to balanced transformer
- Power Transformer Question
- My First Tube Amp Project S5 K-12G
- 6E2 vacuum tube compatibility
- Tube condenser microphone help!
- Audio transformer feedback loop
- yaqin vk amp without the loudness button uk version
- PP driver stage with local feedback
- Leader LAG-120B Audio Generator Manual Wanted
- Transformer brand question
- Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
- EL41 PP power supply questions
- Reduce output on a ECC88CC class A pre-amp !
- SE OT impedance question
- DIY Tube amp book?
- 6P6P tubes?? will 6V6's work?
- RH84 amplifier build, but very weak distorted output
- Paralleling filament transformers
- 6ak5 triode mode disipation
- Equalize or Not Equilize when driving a tube amp ?
- How to retire from DIY and sell off all your workshop contents?
- New to tubes and diyaudio here, question about torrids and tube amps...
- PC Based Oscilliscope for Tube Curcuits
- Lamp in HV Centre Tap - why?
- EL156 PP
- 300B resistor
- Has anyone here bought from ussr-tubes.com ?
- Which cathode bypass capacitor?
- RIAA Schematic for-6SL7,7308 or?
- Chassis' for Tube Gear
- Convergent Audio Tech SL1 preamp
- Buy Them While You Can Not When You...
- Does anyone know of Thomas Martens?
- OTL for 40-80ohm speakers
- Morrison Dinosaur
- pcl86=14gw8 ??
- My little SE with GU50
- Source follower in a DC-coupled pp amp?
- Tube chassis for retail sale.
- Poor man's power supply
- High voltage driver for AB2 operation GU81m tubes
- 5AR4 rectified power supply question
- Direct Coupled Amp
- Is this EL84 kit from Germany worth fooling with?
- 6v6 PP Pentode mode
- 5 pin octal tube socket
- RCA Manual Typo?
- pete millet low mu preamp
- Capability to drive the 211 PP
- 6BG6G SE advice needed.
- Signal Generator: Which one to buy ? What to look for in a signal generator ?
- Power booster
- I've just build this steroe amplifier
- What amp to build? Push Pull, SE? thoughts?
- amp sounds bad- fatman itube 252
- 6C33 single ended class A2 (cathode network question)
- Sweet Peach EL34b Amp - Distortion?
- 6C33C socket types, where to buy?
- haedphone amp. using 6418< NEED HELP
- finished my 6au6/807 amplifier
- Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
- Broskie "Unbalancer" - transformer specifications
- Tube chess.
- How Its Made - Vacuum Tubes
- Please help me understand power supply load
- 12AU7 - How absolute are maximum ratings?
- Tube rejuvination
- Article: Samsung brings back tubes in audio dock
- 1st build suggestions
- Parallel SE output
- Fixed Bias question
- vintage ua 610 schematic