View Full Version : Tubes / Valves
- Tube Hybrid Amp Gain Calculation
- transformer coupled plate follower
- What does your system look like?
- Cascoding tubes
- Advice with modification of Beard power amp
- Harman Kardon TA5000-X power XFMR
- This happens when you hire a good designer.
- Test & Measurement interface for Soundcard
- Where to find large capacity high voltage caps?
- Output capasitor-less "Bijow" headphone amp
- 1st Pass at 1st Phono Preamp; Comments?
- Transformers to try.
- Hum in phono pre - help please
- Output transformer cores
- Output transformer cores
- Presonus Bluetube makeover
- Guitar amp on the cheap???
- Tube Amp Channel Switching
- physically small twin triode tube
- Tubelab SE 2A3 _ Newbie question.
- TJ Full Music Factory Tour Now Online
- where to find cool vol control knobs?
- $200 6V6 Amp
- Audio Research Reference Phono, anyone?
- Review of Suppo Audio's first offering - EL84 Push Pull
- 6n23p(-ev)
- Akikido LSA/HPA 9-Pin or Akikido Octal which one?
- TUBE AMP 1946 worth grabbing?
- SE Newbie wants to go level 2
- Where To Purchase Tube Amp Parts in the UK
- The soul of a new "electrostatic" machine
- Transformer question
- Hybrid caps
- 6021 phono pre-amp
- bandmaster ab763 fx loop
- How to design input stage with specific input impedance/pot value
- Simple SE Grounding Question
- James OPT connections?
- DIY rtp5 help please?
- SS Followers to drive power tubes
- Sophia Electric EL34 Schematic
- DRD amplifier with CCS?
- Phono Preamp
- Dynaco ST-70 with a GSI board, Parts diagram and any info PLEASE
- transistor AC blocker
- PL519 Source
- Identify this mullard
- Suppo Audio -- New Chinese EL84 PP amp for CHEAP.
- Beard p35mkII schematics/photo photo
- Bias transformer question
- Anyone deliberately dial in 2nd harmonic?
- What is the sonic impact of SS CCS in tube equipment
- Phase help
- El34-kt88
- Transconductance amplifier based on hybrid cascode
- Chinese 6Z4, also those regulated supplies.
- Audion Reference restoration
- Anyone try a regulated PS in an Ultrapath preamp?
- Source for Resistor sets?
- High Zout tube preamps with ss power amps.
- PSUD II soft start
- About the 6AU6s
- Capacitor polarity question
- Audio Note line preamp question
- EL34 SE amp schematic
- looking for 12AT7 / ECC81 phase splitter
- 6AS7 getting rare?
- How to power up a new Build the first time
- power transformer for a 2a3se amp!
- 6DJ8 Tube Phono and Line Preamp
- ST-35 Build Using PC13 Boards Questions and Thoughts
- My new hybrid full single ended amplifier project on going
- Punch tools for making metal top plates on amps
- antique sound lab AQ1009-845 interstage transformer replacement
- The search for the ultimate 6SN7
- Looking for a good part web store
- Need your advice for tube amp case
- Questions about grounding
- power supply
- Strange idea for an output stage - comments requested
- Please comment on this EL84 PP design
- 1.5VDC Heater Supply For #26!?
- Looking for 300B or 2A3 design suggestions......gearing up for a new project
- original philips AD-9058
- Bench test equipment, What's yours?
- Gain calculating in 12ax7 guitar preamp
- 7027A with tubelab simple se
- Tube Lab SE Problem
- Tube Socket help, I'm looking at a few, but not sure which material to buy?
- Sweep tube info/specs
- Help for Tango 300b amp
- vacuum tubes type 10 and UX201A
- 6DQ5 specs for audio
- r-core output transformers...
- Isolation Transformer Question
- Buffer question?
- el95 pp amp for guitar
- Two positive rails from a center-tapped transformer?
- Help reqd - 115V PTX on 230V
- Replacing the cathode resistor with a current source in SE ?
- First 300b Design, Please comment
- 6AX4 datasheet question
- Bias Drift
- Recommend me a tube...
- What happens when Heater Cathode voltage is exceeded?
- 100uF Motor Run Caps
- HELP Schematics for RL 12 T 15
- Phono Stage
- TEE Vee Tube fans' SE Cf Amp
- Yaqin MC-10L losing volume
- Pl84 tubes
- AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
- 5150 or slo 5-50w clone
- ECC88, warm up time
- Yaqin MC-10L Heater Voltage
- 6c33 otl amblifier
- self-oscillation in Dynaco ST-70
- computer tube tester
- Troubleshooting the decware se84 kit
- 6L6 PP problem
- First try at an Eagle Schematic/board
- opinions on decware zen kit
- Powerdrive for PP amp with local feedback and pentode driver ?
- having trouble calculating transconductance
- Philips console unit with reverb!
- 300BSET with Kimmel style mu driver ?
- Testing Mullard 12AU7 on Hickok 600A
- EL34/6CA7 driven 300B Schematics
- C450 Radio Craftsmen info needed
- Tubelab Simple SE v.2
- Magnetic shielding with aluminum
- lampizator dac
- AES is At It Again...
- Se Amp with Push Pull Transformer
- 6550 which breed can take the flog ?
- Chassis Question
- EL82 in triode with silverstepper (TVC)
- Joined the 12b4 line stage club. And worth it!
- ECL86/PCL86 Schematic
- Ambient temperature and tubes
- Vintage output transformers
- -ve grid voltage
- Ming Da MC-3008-A2 Mono Blocks
- V-Reg, Gyrator, Low (relative) voltage tubes
- Simple Tube amp
- Jolida 502A replace power switch
- Tubelab build selector switch question
- Matching tubes pot in old Fenders
- tubes supplier
- RadioDaze out of the tube business
- 8000+ hours on my Simple SE
- C-L-C-parallel-R-C
- musical power supplies
- Trimpots sound better than equivalent resistors for biasing?
- Anyone have a simple circuit for . .
- PP Tube Biasing, how good is good enough?
- Aesthetics
- Point to point, from scatch build of the K-12G
- What 6550 for Conrad MV75
- Motorboating phono input on Stromberg Carlson ASR433
- Sunn Sceptre: Weak Vibrato Cause?
- Pioneer sr-101
- 6AU6 in Push Pull: Opinions please
- Audionote M7 and Foreplay III
- vintage triode
- Help with design review wanted
- 6J52P pentode driver?
- a gutar amp I built
- Looking for a good valve preamp
- Anyone try the "Hazen mod" to G3 supressor grid
- 6L6GC -Which Shuguang can take the Heat?
- Using Toroidal PTs as tube OTs - methods and sources
- With a little help... KT88 PP UL Amp
- TechTube Featured In November AudioXpress
- Yaqin MC-100b channel imbalance
- Modify KT88 SE for headphone use
- Regulated Tube Preamp question
- Has anybody purchased from Mable Audio?
- PS voltage changes after capacitor replacement
- Non-magnetic bolts that hold an output transformer together
- e bay op tranformers opinion please
- Audio Innovations Series 500 Rewire
- Which audio electrolytics in tube voltages -- Your comments please !
- Some general opt questions.
- Looking for ANYTHING on the Audioromy 838 w/805A Tube..
- modifying zenith 7d31 amp console
- Questions on JE Labs transformer coupled line stage
- Onix/Melody SP3 Upgrades and Mods
- Motorboating with Regulated Supply
- 27 & 6SN7 Preamp - Crossover
- Budget 2A3?
- first go at design - pp
- Guitar Tube-Amp Entusiast Seeks A/V Advice
- Tube Amp for MP3 Player
- Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
- Marshall amp loses bias
- Building the Baby Huey EL84 pushpull amplifier
- Tube Voltage Regulator, Is it worth the effort?
- Best tubeamp for metal, tight bass
- Donor stereo 845 amp- now what!?
- "Optimal" output grid loading?
- wax poured out!
- Yet another do-nothing tOOb hack.
- What is a CCS - how do you design one?
- Strange Aikido problem when home power fluctuates
- Need to regulate 450v --> 300v
- new to the forum and looking for el86 info
- Why not invert the Tubelab SE board?
- Steve Bench Crossover Questions
- Audio Note M7 - 7F7 CCS
- Anyone have schema for katodcoupled 6C33 P-P?
- Ltspice and Valve models
- VTV Push-Pull 6SN7/KT88 Amp: DIY or China?
- How to identify type of bias used for my tube amp
- VR Tube Question
- Ampmaker Kits
- P-P with some muscle
- buzz w/ nothing plugged into inputs. Goes away once jacked in.
- CV6 / CV1135 / E1148 / VT232 VHF oscillator triode data
- HELP HELP HELP mesa rectifier
- simple se with source selector
- Measuring tube/component temperature
- Parallel Single Ended Amplifier Design using Acro TO-290s?
- Elevate heater trouble
- Adjusting the sensitivity on a 6e2 magic eye tube
- tube amp for automobile / need ideas
- 6550A HF Amp
- problem - scratchy sound, rythmical
- eico st70 irons!what to do?
- How Lampizator CD tube player sound?
- Maestro soya amplificador
- Can I use my tube amp as a preamp ?
- Simple SE with 6BG6GA - magic smoke escapes...
- Shunt Cascode Power Valve Driver
- Did Siemens ever publish data for their own D3A ?
- Motor run caps as power supply filter
- Measure unknown choke?
- 6528a....HELP ME PLEASE...PLEASE..
- Are any of these tubes useful to me?
- Heaters The Key Too Sweet Tube Tone.
- PP Output Transformer design
- "Kingfisher" P-P Amp using 7591A Outputs and Fisher 500B Iron
- 832 ultra-linear push pull?
- 3A5 thoughts
- ECC86 vs. ECC88
- RH84 builder!
- 10GV8 Bias point for the K-12G
- EL34 amp blowing up, anode glowing red hot
- Steve Bench's LR Phono Stage - Cathode Bias Circuit Question
- Tubelab SE w/Parafeed