View Full Version : Tubes / Valves
- How Would You Change This Soildstate Circuit To Tube
- Using existing transformer winding to provide and additional supply
- Magnetic shields for transformers
- First DIY job: Dual Tube Recording Preamp
- James Transformers
- Audiopax Model 7
- Isis 3030 Monoblocks
- From diode to tube rectification in my Aikido
- Williamson KT77 Question
- mu followers --- current --- please help
- need tube schematic
- switch snubber for Aikido
- Pioneer Tube Schematics
- Question about "bloaty" bass with SET and KT88's
- Ultron 6v6GT
- low power OTLs
- 6H30 equivalents
- What Would You Do?
- k-502/k-12m vs. Model 1 pcl82
- Shunting Pot
- Suggested replacements for Chinese tubes
- What to do with these.....
- ECL82 PP "reference" amp
- Heater TX proximity
- Quick question on the PP-C1 amp
- SET "interstage coupler" for First Watt F4
- 811A amp Class A2
- TVC before Input Transformer?
- Point-to-Point, Pointers
- Triode recommendation
- Schmitt & CCS
- Simple DC Heater Supply
- Output transformers ? sound quality ?
- KT88 Minimum Mounting Distance
- LED bias indicator
- Standby Switch
- chinese tube amp
- Broskie OTL
- Connecting a single plate to multiple screens?
- voltage divider+Aikido
- Wiring PSU and Aikido PCB
- Mission 300b parallel single ended
- Vietnam tube amplifier festival
- learning design but need help
- tutorial software
- Fisher 500C troubleshooting
- triode pentodes
- Deriving Secondary Voltages
- Here's the W-5M schematics . . .
- Question for Heathkit W-5M owners
- Classic 16.0
- 100 Ohm loudspeaker
- Are Srpp's Any Good (please Help)
- Blasphemy, I'm sure
- Decware ZSLA buffer -- worth cloning?
- Pse El84
- 6S19P Push-Pull Amplifier
- Class B Triodes
- Need a serious PP driver stage
- laptop->tubes?
- cathode follower -- damping factor (HELP please)
- Interstage X-former identification
- Multi-turn pot?
- 6L6G and 6L6GB differences?
- 6AK6 low power tube amp finished
- 7 pin X
- Replacing KT88 with KT90 - Beginner's questions
- way to estimate choke current rating?
- attn: Montreal, QC, Canada, OPAMPS!
- Hiss but no hum...
- Cap size for Aikido heater PS?
- Heathkit W-5M
- NTK " Teds tube mic"
- Making a Bias Voltage from B+ tape?
- Reg. Heater Circuit
- 6AG7 UL Curves
- Best SE output transformer for 300b - shootout
- Single ended amp from class A push-pull
- Yaqin MC-100b schematic diagram
- 12/24 volt tubes
- Favorite noval hi gain dual triode?
- AVO MKIII Tester Operation?
- Aikido users- anyone NOT have turn-off thump?
- Optimum value for volume control?
- VAL MPS mark II preamp gain reduction
- It is asked drawing 100 or 200 watts amplifier
- Mystery ST-70 Driver Board
- First Timer needs help
- Help. Bogen m60a
- grid-grounded preamp sound
- Rectifier switching / choke ringing noise
- Single Ended Amp Design -- Help Needed
- tube current
- Needed : ECF83, can anyone help ??
- Problem with a solid state CCS
- Looking for low-ish rp single triode
- Cleaning beverage out of inside tube amp
- Aikido problems!!!
- Another Power Supply Question
- 2a3 output transformers....
- yet another 6em7 amp
- zenith amp
- 6AG7 Amplifier
- Valve Power Supplies?
- tube tracer article
- PCB design techniques for Tube Amps
- Adjectives for tube sound!
- Question about Amperex tubes and a preamp
- I want to build a preamp for my dad.. thoughts?
- Constant Current DC Heater Supply
- Weekend Fun with Tubes - Guitar Preamp
- Which valves for MF CD-T
- 6C33C-EB / 6C33C-EV extended life ?
- Yamamoto A-08S RCA 45 tube amplifier original schematic
- Audiovalve RKV schematic (hybrid headphones amp)
- Music Angel EL34 XDSE
- Dynaco PAS Preamp Tone Controls
- build 805 or 845 se for ~$1000
- Built a quick 26 pre yesterday..nice so far,,
- An UL preamp idea.
- 6BX7 PSpice Model?
- using 24G and 3B28 in an od ball amp.......
- Tube Line Buffer
- Please help me build an amp for my father
- Why is my phono amp fatiguing?
- Heater current drawn by 8416
- want dead counterpoint SA100 SA-100 in good cosmetics
- Cathode Followers and Clipping
- transformer secondary connections
- imp amp
- Information 6DJ8
- Smoothing Cap = Noise Source?
- peavey ultra 60 footswitch wiring diagram
- 6S19P budget SE.
- adding reverb to a PA head
- My 2 new latest Dynaco ST-70's
- help with KT88 / mikaels SE amp
- twin reverb 100 watt
- adding LEDs to amp head
- What Is Line Level????
- chokes, caps, and long distance relationships
- First foray into tubes!!
- Simple Hi-end 845 amplifier
- increased choke inductance - recommended?
- HELP PLEASE - with preamp design
- Alternative to James OPTs
- DIY preamp tube: Audio Research Reference 3???
- Crowhurst's Twin Coupled Amplifier
- 6lw6 tv sweep tube bias?
- 24V aikido build!
- magnavox tube radio
- New S5 L series kits
- Anyone has experience with Stranwood
- 6n6p amp
- DC Darling Amp – Buzzing on both channels.
- 6SL7 EL34 300B amp
- I just installed Yeos (DIY Paradise) DC Blocker
- Measuring Cathode Current
- Need the Ogirin Circuit of Bruce Berman
- Input Choke Too Small
- Poodle gives clues to capacitor construction
- Would a line stage/preamp be beneficial? NEWBIE question
- 6p45c
- fanon pa amp schematic
- line stage confusion
- Hammond Transformer Secondary Connections
- Klimo Merlin LS Tube Power Supply
- OPT Design Assistante (EL84)
- Hum - can't find an answer by searching the forum
- Please critique my plans for a WE91 clone.
- Emission Labs 300B Mesh plate
- DRD Power Supply
- Octal Champ works - pls check design
- telefunken EL 34 audio tube
- Bias instability in Heathkit W-5M amp
- EL-34 instability in EICO HF-35 amp
- Russian paper in oil caps - any good?
- Matching Impedances
- Open-Source Audio Input Switch
- Phono pre amp RF problem
- Best CHEAP + best BEST current production EL34?
- New toy
- EL84 SEP schematic. Some questions.
- Referencing DC heaters to cathode
- Need advice on Val Audio amp with EL-34 Tubes
- Please help a newbie with PSU current requirement for Aikido linestage
- Loudspeaker noise from 300B
- Schematic for GU-50, EL34, 6J32P ???
- alternative for heater / B+ references
- need a little help from some tube Gurus!!!
- EF86 + SPICE = no noise contribution?
- 6n1 tube = 6n1p
- One channel softer than the other, humming and buzzing
- Parallel Output Transformers
- Distortion from heater sag?
- Testing 5842 / 417a
- RH ECL86 Amp: Dave?
- High gain pentodes
- Tube Matching and Push-Pull
- What constitutes a leaky Coupling capacitor?
- Question on Input Connections
- s5electronics tube amp kit damping factor
- 6L6s and cabinet selections HELP!!!!
- source of nickel + silicon steel laminations
- Explanation for this problem?
- turn off thump
- Pop from amp when turning off
- Big Paper in Oil Caps
- Valve noobie asks for help / advice
- Polypropylene vs electrolytic in Power supply
- 6S4P vs 5842
- Calibrating Your Hickok Tube Tester
- Which 2A3 ?
- New design: 12V push-pull tube amplifier
- hybrid power supply: diode bridge into diode tube
- heater reference to B+ and buzzing trafo
- Hum cancelling scheme?
- Run a transformer backwards?
- FIVRE RRCF info needed
- Siemens Valvo ED-8000
- 6J5 and 6F6 SE - enough gain for guitar?
- My last Zamir Aleph
- Questions about first tube PSU!
- Looking for site
- Heater voltage mismatch
- Contacting Pete Millet for 813 PSU?
- Suggestions for first tube project?
- Just Saying Howdy
- Wiring a tube rectifier PSU
- Looking for a small yet powerful pentode / dual triode?
- Earth Bus Wire - Where can I get it?
- Tube Amp Startup
- 45 amplifier
- Noob saying Hi...
- Maida regulator
- Sensitivity limiter in Bogen MX60a
- Just finished first amp
- 6080 / 6AS7G power amplifier
- Schematics
- General questions before finishing up ST-35 clone
- Will a 12AX7 sub. for 12DW7/7247?
- Deutsche Wurlitzer Lyric Jukebox?
- Made in China buyer beware...
- Variac to power-up Beveridge OTLs?
- Any ideas on how old this is?
- Philips Tube radio
- Improve Avel toroid in OTL amp
- tube pre amp mods in queensland, australia
- 6SL7GT pre-amp
- Aikido circuit question