View Full Version : Tubes / Valves
- PP 6c33c-b
- Modifying the classic Williamson
- eimac 152TL and 304TL
- LTspice model for Dynaco A470 Output Transfomer
- audiodesignguide.com PP KT88
- One more 4P1L SE
- Mount rectifier above torroidal transformer?
- Extending Tube Sockets off a PCB
- EMG 200 tube tester
- Looking for a great starter stereo P-P amp
- Question regarding value of Telefunken tubes.
- Magic Eye tube
- Partridge Transformers
- 6CG7 replacing E88CC in SE KT88 Amp.
- Omit the filament windings -- LTM8033 from Linear
- Best position for bleeder resistor?
- anyone have experience with a Radio Craftsmen C400?
- Amp-A, a variation to the EL84 Push Pull theme
- tony's 6LU8 push-pull power amp build
- First Post Here
- MFA Lumi sings high-pitched tunes
- Power tubes not drawing current
- replacing tubes with circuitry
- High Voltage Regulators (Maida or zener)
- GU-81m tube amp schematics???
- Suggestions on SIPP driver stage
- How to eliminate the "white noise" for the 300B tube amp?
- 6BQ5 UL Curves?
- Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
- 6N1P and 6N6P OTL headphone amp
- New Project
- Understanding Steve Bench's regulated power supply
- Preamp with buffer design
- JP200 preamp?
- IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
- New Tube Manufacture?
- Lowering B+ in PS
- Rectifier tube blows
- direct coupling
- Need some help with these tubes
- Edcor GSXE10-8-5K primary Inductance?
- SE 2.5k secondary 2w guitar amp
- My "Red board" chassis
- PP EL34
- Building something better with a Chinese SE EL34B Amp DIY Kit
- Problem with my amp, and I have run out of ideas
- Value of coupling caps
- Testing 6BQ5 on Hickok I-177B
- Stepped Attenuator for AI Modulus IIA
- Tubes are beautifully colored....right?
- Differential Input for Aikido Amp?
- MY BEST OTL PREAMPLIFIER
- Valve testing machine
- Line stage with 12AU7 and 6CG7 anyone?
- Vibrating capacitor
- MingDa MC845-C or Opera COnsonance Reference 9.9
- Lower gain 12AX7?
- Needed: schematic for Ming Da MC34ab
- 12AX7 high gain guitar amp
- Solid State Cathodyne Phase Splitter Device?
- My Wave Isn't Square.
- 6J7 driver in WE91 like amplifier
- F2a - C3m Monkey
- balanced/unbalanced questions decision time
- Stern's saville double 6
- GM70 psu transformer.
- Antek toroidal vs Edcor?
- current production pentode, I_a ~ 8mA
- Brook 10c clone
- Unknown lamps need help
- What's wrong with this?
- Microphonics from C0G Caps across Heaters
- Yarland FV34CIII vs Synthesis Nimis
- 12AT7 and TDA1543...
- Eico Hf-81 Integrated Amplifier
- Tubed voltage regulator for KT88se amp, need help ?
- 1st post what can i build with this?
- CJ PV-3 voltage values for schematic
- How to analyze square waves?
- From KT90 to KT88
- side by side bifilar windings in excess of 1000 volts
- looking for a great tube amp book.
- Revox G36 Mod for preamp
- 33 in triode mode...any experience ?
- Help with Decware Zen EL84 SET
- Bumblebee Caps
- Find schematic of amplifier mcintosh mc 275 mkiv
- Heater wiring - Coaxial?
- now mono blocks!
- Heathkit AA-40 or AA-121
- UTC o-9 ouncers for headphone amp?
- Help modify 6H30 Mu-follower stage
- Help me to identify unknown tube
- Valve Compressor Circuit
- Should I rebuild my Eico 950 Cap Tester?
- Choke orientation (Need help)
- push pull 813 tube in ultra linear mode
- AD1865 DAC + 6SN7 analogue stage
- Inexpensive tube amplifier kits?
- SET amp/speaker issue.
- No pre-Amp - Pre Amp
- Found a CHEAP source of output transformers in Europe
- How calculate cathode LEDs biased
- ESR test for tube amps ?
- Anyone familiar with my 1975 Ampeg SVT
- asking help/knowledge asked: luxman d105u output stage
- Have you ever seen a 4 pin blue Alps pot??? need help
- Any ideas on this one???
- first 5f1 build is acting funny :/
- '57 twin question
- Why not 6C41C used in OTL??
- 6p14p(EL84) SE with 6n6p build jurnal
- Oscilloscope - Which one should I get ? What to look for?
- "Jonokuchi" - new desktop amp, or "Little red board"?
- Robust Driver stage recommendations
- Wireless World valve articles from the past
- Overshoot and Ringing
- B&K Tube Tester
- Harman Kardon A50K
- Which Fender Deluxe Circuit?
- HiFi Tube amp project
- Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
- Tone control - good diagram needed
- Pentron tube microphone mixer/preamp
- Dolby AC3 coming on nicely.
- Power Supply Question
- Dynatuner FM-1 Restoration
- faulty audioromy 6550 no output and very faith sound please help
- just one tube preamp or driver
- Power triode preamp a different way
- £49.95 Tube amp?!
- Which cap for the Musical Machine?
- How much power do I need in the kitchen?
- 1Gohm or higher resistor ...
- Grounding check for SE 300B amp
- Suggest me a build for HD600 headphones
- 6BQ5 Screen Voltage Regulator
- 6SN7 Tubes
- My first tube Amplifier VT4C DIY record
- Amplifier output wattage test
- Troubble shooting help please.....
- Heater Wiring
- 220/110 step down in reverse ... and more
- Input Level Devil please help
- Soft start for a preamp?
- Opinion requested: MingDa MC300 variants versus Consonance Cyber range
- Using one KT77 and one EL34 per side?
- Help identifying transformer wires.
- tube pre and tube power amp
- Spice Models for Tubes w Screen Grid by Gurski
- Theremin project needs some help!
- Transformer abuse or other use
- aikido heater voltage
- HY51Z datasheet, help !!!
- 6L6 amp with unique phase splitter - check my math
- Dynaco A451 Output Transformer
- my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
- 6AU6 preamp problem
- Help identifying a Telefunken(?) tube...
- UCC85 and e-pay
- Lundahl LL1676 - missing data
- valve phono pre-amp HELP needed
- Preamp pcb
- ECL82 pp guitar amp project
- Strange Problem In Tube Amp Build
- Output transformer question
- Replacing ECL86/6GW8 to PCL86(14GW8)???
- On or Off?
- Neg-Feedback into Grid of gain stage instead of cathode?
- Accuphase F-25 Japanese manual translation help!
- Negative supply with CT tranny
- E130L SE again
- tony builds a 7N7 preamp
- Tango 10429 78% Nickle Output Transformer?
- Bias for Ipod Input
- What about this driver????
- allen organ amp 75
- Needs help Tubezone Poseidon
- Lightbulb trick on filament circuit?
- AMC CVT3030a Help for repair
- TF110-48/UL in the UK?
- hum in pas2
- Aikido Cathode Follwer Question
- 12AX7 tube preamplifier for bass guitar (Need help)
- Fuses...what's the deal?
- Question Regarding a Partial Feedback 807 SE
- Preamp issue on Fender Blues Jr.
- Leftover transformers
- Newbie "In Search of help"
- ELL80/ECLL800 Cathode follower
- The "Tube" bookshelf
- Basic tube power supply question
- knight KG-240? low output help
- Reverb trouble-Schematic reading help needed
- Vacuum tube VCO
- JE lab 2a3 , fizzy, squeal in one channel, help
- Trouble with a DIY EL34 Tube Amp Kit
- SPICE Transformer Model Spreadsheet
- Choosing the right triode as a Phase Inverter
- toob noob with GE 5670 and I'd like to do something with it. Help?
- my first tube amp, no tubes...
- Enough heat to power my CD player...
- My first tube amp: 6C33C
- S5 16LS kit as a first DIY tube build?
- lady day we 91 psu mod help
- On days like these ...
- The Magnetron - A Low Noise, Long Life Amplifier????
- 6M11's
- DC coupled 300B idea - request for comments
- Fisher bias
- How does anode voltage swing to twice HT voltage?
- Can a 7625 Ceramic Planar Triode be soldered ?
- AMI "DD" Project: 6L6
- Plate loading questions
- EZ81 rectifier
- PY500a
- Tube Regulator Thoughts?
- Fully balanced from cartridge to loudspeaker - a little help needed!
- OPT on the speaker side?
- tube circuit conversions?
- Current inrush limiter suggestions
- Repair of Philips EL6416 amplifiers.
- GU-19 In priboi
- Duncan Amps PSU Designer II
- Troubleshoot help for vibrato type problem
- using existing pre with this circuit
- Laney Tube Fusion 200 series 2 footswitch
- Antek AT-070L Specs
- Unused tube sections
- Rewire Rectifier Sockets for Tube Substitution
- Shuguang 300BC
- Sn/Pb S-Sn/Cu ...
- What and Where is BAF?
- CCS plate follower 12bh7 schematic needed pls
- 300B DC heaters confusion
- Blue Tube Red Plating = Help!
- Tube bass preamplifier power supply (Need Help)
- Opera Consonance M500 mkii
- 6AC7EH Better but different
- For that hard to find 5HY 2 amp choke...
- Cleaning up an old ST-70 chassis
- Accuphase P250 Amplifier Schematic Requred
- Pls Help me, this 6C33C pp Schematic is OK?
- Loud Noise due to NFB
- NAMM Zoo 2011
- Recommended O'Scope Reading?
- Damage to valve amp when powered up but disconnected to speakers?
- preferred resistor type
- use more then 'maximum capacitance' after tube rectifier
- Headphone Tube Amp D3a