View Full Version : Tubes / Valves
- Transformer power formula Help???
- 2A3 OTL 800 Ohm Speaker
- Trying to find specs on transformer core material
- 12AX7 suggestions?
- power supply (cap input)
- is it safe to connect these secondaries in series?
- Peter Millett's Uniamp with KT88
- Mystery transformer
- Can I phase split like this?
- How to model psud2 using tube regulator?
- Choke-loaded 6C33C stage
- EL84 as both driver and output stage.
- Silvertone (Sears) stereo amp
- Chasing hum in a new tube amp
- Zenith K731 AM/FM radio audio random cracking sound in FM mode
- 6bx7gt Se Amp
- Beard P100 Bias Lights
- Metasonix TS-21 modulator
- help with diyparadiso schematics
- electrostatic shield - nice to have or recommended or doesn't matter?
- Simple method for 240V from 240V line
- Audiophile bibliophilia nervosa
- Help with amp layout
- Why triode Mk3 is louder than stock Mk3
- Seduction or Cornet for phono???
- Please review my 6AQ5 Amp
- 832A PP Amp LTP
- Checklist to observe before applying the mains
- C3g driving 2a3: Triode or pentode?
- psud2 question and Fi Primer's 211 circuit
- Jolida JD-301A & Jadis DPL
- Headphones with a Tube Amp
- 6S3B-V Wire-Ended Single-Triode tube
- Anode stoppers
- Weird Quad II mains transformer help
- Mullard 5-20 parts list
- has anyone DIYed a Citation 2?
- Bogen/plexi conversion question
- Matched pair - different brands
- ERIC Mod 3460P Restore
- PV12 Preamplifier
- Grandma's old Capitol Console
- Music Angel
- What is the version of 45
- Aikido for guitar?
- Heathkit potted power transformer question
- Thermionic Cooling?
- What have the finest sound, the PX4 or the 45 ?
- value of a cap between driver tube and output tubes
- do matched pair (or maybe a quad) output tubes "aged" at the same rate?
- Mini EL84 Amp Done
- Overcoming Miller
- Heathkit Schematic model AA-50 needed
- Help me choose please
- Mono Class A SE Schematics
- Irish DIY Meet.
- Sizing PP OPT
- 6BQ5/EL90 guitar amp schematics wanted
- Do SE transfomers get hot?
- Aikido Questions
- LTP with interstage trafo
- 6BQ5 Push-Pull amplifier
- Amplifier input
- C#@$ quality 6L6EH's
- Mains toroids appear to be great for audio
- High bias point.
- ebay amp
- GU 50 output modification
- 6C41Cs Class-A PP
- My First Big Amp
- sv572-10
- Stupid PAS-2 Pot Questions
- Old electronics articles
- UL Feedback
- who know fd23 and fd422 tubes?
- Laptop amplifier
- Thoughts Of Modifying My First Tube Amp.
- Quick question for Eli Duttman (or others!)
- Blackened GZ32 glass envelopes
- Are these vintage vacuum tubes suitable.....
- Tube XP8109-02?!
- peak current 300B heater with start up
- Microphonic phono preamplifier
- Pentode Plate Load
- what monoblocks to build?
- All tube direct box
- max b+ for 6V6
- What speakers to go with tubes ??
- Bluenote Koala Tube CD Player
- OPTs and power for bi-amping
- Quick And Dirty ~75W Guitar Amp
- Old Diodes
- Father, I abused my Leak S/20
- 6688/E180F line stage?
- Variable feedback to enhance damping factor at low frequency
- Need assistance with picking the right Edcor audio transformer
- Critique my first design
- Biamping, phase of output?
- Ground star
- op-points for 27 pre...?
- Opinions/Experience of Toroidal valve amps
- hum, no way to get rid of it
- How to adjust my circuit for frequency response?
- Input Tubes?
- 6BG6 = 6L6GC with top cap - cheap!
- Maida Regulators Redux
- ground of DC bias supply
- does anyone the website for yaqin/mr. liung/music angel amps?
- plate load ccs ala gary p question
- Books for newbe
- 6AS7 OTL
- n00b phono preamp troubleshooting..
- TubelabSE - Anyone built?
- any example of SE designs using GM70?
- Shunt regulator question
- Any RH807 builders?
- Replacing multi-section caps with multiple caps?
- Recycle an Eico HFT-90 for a preamp
- EL84 PP output transformer for 6L6 PP class A
- Jensen PIO capacitor burn in
- toroid psu, weird results...
- Squeaky Noise in ARC Dual 75
- EL84 mod questions
- Measuring DC at preamp output
- Is Northern Electric the NEW W.E.?
- Burnt Woodside STA35 valve amp... Help!
- My tube preamplifier project
- Ponderings on hybrid 300B
- Maida Regulator Parts
- anyone familiar with the 211/vt4c circuit from Fi Primer?
- Calculating operating points of two DC stages
- Advice for retubing VTL Ichiban`s
- Need help
- Art Audio Kit on Common Ground Magazine
- Moskido - Hybrid Aikido/MOSFET amplifier
- Advice for retubing VTL Ichiban`s
- fisher 800c intermitant hum
- calling Yves....
- X10 Pre
- NEW KT66 - 6AU6 single ended
- mechanical hum
- Big valve preamp
- Question about biasing heater above cathode in a direct coupled circuit.
- center tapped choke inverter
- Guitar tube pre DIY suggestions..?
- Which One Of These Tube Amps Should I Buy?
- Tube Info
- Circuit/Equipment Designer
- help needed with noise in phono preamp
- Pentode driver and IT?
- Plate Caps for 832A
- 300b advice
- Designs on your noob, err, tube
- 7788 Triode Curves
- EL81/6CJ6 operating point
- Separate cathode resistors in push pull output
- C3m linestage
- Anyone know this 13E1 design...
- LTP w/ positive only supply
- 6V6 line preamp
- The 6P43P russian tube is a EL84 equivalent ??
- Ixys IXCP10M45s IC
- Help with hybrid mosfet valve amp
- Substitute for 6gw8 in Heathkit aa-32
- U-Follower: Output from Cathode or Plate?
- Getting rid of oscillations in the preamp
- has anyone used the 4-125A in SE amp ?
- line preamp using 6SN7 instead of 12AU7
- 3-pong conversion for Acoustic amplifier
- 6v6pp design
- CCS Plate Load
- All tube voltage doubler
- best value/performance ECC83 on market
- Help needed for my preamp
- 6H6p cascode differential driving 2A3 PP
- Best phono / line preamp
- Point to Point
- gain curve questions
- Questions concerning Aikido Line amp
- Partial cathode bypass to effect a treble boost.
- SE bass
- choke orientation
- Musical Fidelity X-PRE schematic
- Circuitmaker Spice question
- Trouble with a paraphase PI
- 27 pre PS question..
- 6AV5 g2 driver
- Calculate PSU output impedance?
- Output stage biasing, with the driver stage
- tube pedal plate voltages?
- grounding and 12AV6 diodes
- 6as7 Pse
- Looking for datasheets
- Ping Albert from Canada
- Old Tektronix booklet
- fisher 800c phase inverter adjustment 2
- Quick Transformer Question
- Power supply for Heathkit
- low-power output tube quality
- Conn Caprice organ
- Conservation of tubes
- Brimar EM87
- Tube sockets without the ceramic carrier.
- SET with tube-based CCS???
- fisher 800c modifications
- Bottlehead meet.
- Tie cathode to heater??
- anyone seen it tried like this?
- What do people think of the SETH 2A3 PP?
- Very high plate voltage EL34 amp
- How About Bridging SE
- Fisher 800c Has Odd Cathode Reading
- What part of DIY do you LOVE?
- Priboi tweakers ?
- 5751 and 12ax7
- LM317 + ceramic cap Q
- Derive Triode Curves from Pentode Curves?
- 7701 distortion device?
- Looking for the perfect giftshop
- 300b
- Choked ripple killer for SE?
- Dynaco Kits
- Positive bias for tube CF?
- need help
- Xindak attenuation for use with Leak Stereo 20, help please
- Series heaters = small problem?
- Recommend an EL84 tube for HIFI
- Help - need some info on this valve amp, please
- H. Olson's amps
- 12AT7 and the Simple EL84
- New K-12g only one channel working
- Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
- Rauland Borg 6L6 amp Need Info
- Hum Noise!
- Tube regulator for solidstate devices
- 6gu7 a sub for 6cg7/6fq7?
- obsession sd-600 300b mono block
- how do you know you need matched pair?
- Nobu Shishido's 805 SET interstage
- KT88SE, turning OPT
- New to tubes.
- OB with.......well, TL Audio's iTUBE :)
- Matched tubes required?
- GU-50 output trafo
- Are Hammond power transformers good enough ?
- Transformers.
- Quicky - magic eye between preamp and power stage
- HT to rectifier
- 6AV5 spice model
- Audio Research LS2 from 110V to 220V