View Full Version : Tubes / Valves
- DIY Dynaco ST70
- Help need some info on this Raytheon
- Isolating parallel feed amplifiers
- Please help for B+ problem!
- Second Tubelab Simple SE board done
- "Sallen-Key" Public domain?
- Transformer questions / Good headphones?
- Which Spud Amp?
- Very simple SE Triode Help
- Tube friendly speakers
- Counterpoint SA5000 schematic
- Yaqin MC-10L
- Screen Driven Dissimilar Pentode SE Anti-Triode Spud
- Power tube bias increasing with signal.
- Preamp suggestion required pls
- How to change deemphasis from 75uS to 50uS for Fisher FM100
- Which 300B ?
- Custom OT for 6C33C tube - any advice
- s-5 tube amp hum troubles
- Cathode feedback on Mikael's SE KT88?
- RCA tube rectifier
- 300B Schematic
- Tubelab wiring
- My first amp!
- Building a Aikido preamplifier
- Tube rolling causes failure...
- Briefly subjected heaters to about 12v by accident.
- She lives!
- Wilcox Gay 5U
- 6EM7 project: maybe use more sand?
- 12B4A SET - any critiques on this project?
- Heathkit Manual
- What is this??
- Amp and Speakers decision
- Hey guitar joe...
- Question about Low Impedence Filters on a Bogen PA Head Need Info.
- counterpoint 3.1
- good book for learning the basics of tubes and tube amps
- Heater circuit - to twist or not to twist
- Rock and Flame: Wavebourn Barracuda
- Low voltage rectifiers?
- Horz Sweep amp Pent or screen drive
- Lessons learned building a 5VDC Power Supply for a 300B heater
- Getting frustrated--- amps and speakers for the noob
- Smallish chassis feasible? Multiple pics
- Using a Maida Regulator with a CCS
- Which Aikido pre-amp PCB for a newbie?
- Newbie wants to build Tubelab SE Monos.
- FM transmitter / PA
- What value attenuator would you use in front of a 396A in a preamp?
- Hybrid OTL Circlotron idea
- Heathkit aa-121
- Help please checking my B+ design
- Selenium rectifiers
- isolation transformer - high voltage.
- Cathode Bypass in a PP Output Stage
- Mcintosh Tube Amplifier Protection Circuit
- Where to start? Or: cool these plates down
- epiphone pacemaker 50 t
- Hum trouble on old PA amp
- Crazy newbie tube driver question
- UHF tubes for audio?
- Suggestion for this tube preamp
- PCB Board software?
- 300B push pull amp
- Simple P-P 84 proto
- Keeping cost down?
- Tube Amp Kit for newbie
- 40% Tap direct to plate
- Funny bias problem in PP EL34. Please help
- Transformer from Heathkit A-7 amp
- Any tube stores in Burnaby, Vancouver, Canada?
- B+ time delay circuit - your comments
- PCB mount line input transformer question
- SRPP circuit question
- Russian tubes - what pin material?
- Auto-bias - easy to convert to or not?
- old style anode/grid caps
- 6H30 Dual Triode
- Why would the frequency response vary so much on a pair of Monoblock amps?
- Disassembling output transformer
- Tube sockets
- H. P. Friedrichs
- The Rebuilding of Theta KT-88 Tube amp.
- Please check my PS pcb board layout for problems????
- glass capacitors
- Help w/fixing counterpoint Sa7 preamp
- IXYS 10M45 CCS IC question
- Wing-C 300B tubes and opinions
- PX25 DRD Power amp.
- rectifier tube recommendation please
- 6C33C to more standard triode conversion - any ideas?
- PP EL84 Build Questions (Bevois Valley)
- Tube line stage output impedance
- volume between gain stages
- Dyna ST70 PWR Tranny 6.3V Crnt Spec?
- Next Project - Darling Amplifier or 45
- tube magazines
- PSU choke help please
- PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
- TubelabSE phase
- EML 300B XLS and Mesh comparison
- UL - triode switch
- Spud anyone?
- Nooo! Almost have this amp built!
- Need help - Old cap can ID
- 16SL7+6SN7 Aikido
- 1600Hz Transformer?
- Anyone have a Bogen MX 60 Schematic they can post
- mc100b burned up
- DC heating, parallel diodes
- Identify Amperex Tube?
- Which speaker tap when going from UL to triode
- Tube wont bias...
- DIY stepped attenuator
- TV-7/DU KT88 Settings?
- Filmosound - Tone Knob - Tertiaries
- Hybrid Amp, Tube+MOS FET SE
- 3.1 integrated possible?
- Plate choke material, why to use amorphous core?
- Anything obviously wrong with my mic pre amp ?
- K-502 or Yamaha RX-V361 for Klipsch F-1?
- Help diagnosing phase-splitter
- question about Bruce's GGP preamp
- Rickenbacher amp HELP!!!
- interpreting max. values listed in datasheet
- zenith mlt 15 console record player problem
- ORIENTED or Not ORIENTED cores for OPT
- Audio Research SP-3-A-1 modified.........
- Tube heaters in series.
- Output transformer listening impressions?
- Tube buffer 6H6P after a DAC
- S-5 K16LS in enclosure - Pics
- Time to mourn the death of Broskie's Tube CAD blog?
- 6N6P preamp
- our Preamplifier using 2J27S tubes
- dc filament design question
- 6AV6A for meter driver
- AC wiring heaters, A or B ?
- Aikido preamp muting
- Help! New Yaoin MC-100B with intermittent crackling noise from speakers
- hummming YAHA
- leave a variac on all the time!
- More triodes
- Full Wave Rectifier
- Blowing B+ fuse
- PSRR of CF w/ CCS Sink
- MENG Series "EL34B" Integrated Amplifier
- Concertina Parafeed, or How to mess with OldEurope's mind...
- Phono stage success!
- A few pretty pictures and an ugly picture
- Rectifier with slow start up?
- Calibrating an emission tester
- What is this?
- 4XKT88 drive
- EL84 driven 2a3
- need suggestions for "standarizing" tube gain stages
- How long until someone tries
- Hickok Photo History - hidden web gem!
- Common Audio Tubes in standard use
- tango input transformer NN-6
- Filmosound dual pot
- Hi power Moskido with A/B output Bias
- how easy to make tube amp?
- metal film resistors or carbon?
- Quad II tubes replacement
- Sirius & FM
- Can someone look at a Counterpoint SA7 for me?
- The Wintersweet High-Vividity Project
- loftin white 801 amp
- Pics of unique design of amp chassis?
- Heathkit AA-32 modifications / upgrades
- Tango XE-20S Specification
- Question about Edcor output transformer
- SE EL84 output stage?
- New ST-70 Driver board from Blackburn Audio
- Transformer primary rating question
- Heathkit A7(c?) Rebuild
- Rewiring a socket to take 6GK6 instead of 6BQ5
- 317 CCS Question
- Active filter design software
- Larry Moore 10Y Squared
- Do you hear “pop” when you turn off your amp?
- Filmosound - Guitar - Ground
- Simple tube phono stage
- Tube phono amp repair/redesign help wanted
- Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
- tube newbie needs guidance
- Interesting linestage optimizing ideas
- Powered up my Lafayette 224A for the first time!
- Hickok Upgrades
- Passive BP filter sim results
- 100mA heater tubes for phono
- Audiotester + M-audio - info + question
- Indestructible HV hybrid regulator!
- yet another modified 5-20 amplifier
- help with OT for 15 watt tube amp
- Power supply for 12SL7 phono preamp
- few questions
- mystery 5881
- does lower B+ cause scratchy distortion?
- SY please keep us updated about your site
- Cleveland Ohio members?
- Scope tricks for detecting rectifier/choke switching
- To choke or not to choke
- Tube rectified LC PS for 6SN7 Aikido - choke DCR question
- Convergent Audio Technology (CAT) SL-1 preamplifier
- Very low current CCS?
- Morgan Jones' E88CC Phono
- pse help, unity µ triode as a phase inverter
- variable capacitor volume control
- What to do with P-P transformer ?
- 837 tube for SE Amplifier
- calculating transformer current draw question
- glass audio 1995 "Single Ended Glory"
- Manual for Heathkit AA-121 Power Amp
- Low gain triode recommendation plz
- Tubelab PP question
- Output transformer impedance question
- Choke... The side makes difference?
- Tubelab...Why "sandy" SE amps?
- Fostex Meets Pentode I need some NFB
- Oddball Sweep tubes in PP
- Noob - where to start?
- big doubt: dynakit st35 VS diytube st35clone
- Compactron Output Tubes
- XPP amp
- Tubelab SE ... which 5AR4 ?
- Getting only 400 hours on Class A2 PP tube
- Pete Millett's 829B amp -> monoblocks
- 6JU8A Spec confusion
- post on amp design by a newbie
- (INDIA) ECC802S/EL84 build, hardware requirements
- 6gw8 /ECL86 El Cheapo modifications
- Danielak's 300B design
- 6080 @ 800µA Question ...
- Groundplane layout theory
- delay on for 83 mercury vapor
- Anyone tried "Weber Copper" SS rectifyers?
- Scored a bunch of tubes at HamCon
- AB2 Anyone else done similiar
- 6v6 pp amplifier
- Loud 60 cycle Hum from tube amp.
- Building a Preamp
- another Big One....:)
- JJ factory pictures ...
- Good enough CFs
- What's a good way to clean tubes w/o taking off the labeling?
- 6BX7 or 12B4A for small SE amp?
- Schematic collection posted by a kind soul...