View Full Version : Tubes / Valves
- Darling in Europe... (110 vs. 220)
- DC heater (+/-) -> elevated?
- Tubelab simple SE help needed...working but only on one channel
- Yaqin MS-300B SET amp
- 300b calibration (tubelab)
- Sonics of a "dynamic coupled" driver
- 716p's Vs. Fancy Caps
- ELL80
- Will this work?
- What circuit to build with MQ TL-404
- Very low output from Knight KN928 amp
- 6GK5 to drive a 6AS7?
- Plate Heater Dissipators
- preamp suitable for Dynaco st-70- OTHER than dynaco
- 'EL34 World' website for music amps
- Strange Russian(?) tube tester
- is this possible?
- Power transformer impedance
- Anybody did compared tube vs opamp for preamp ?
- The days of wine, roses & WE205D
- I need to ask...
- SPICE model for 6AK5 wanted!
- Differences with 6C33 Tube Types
- mugen hybride
- 1st Build - Kit or No Kit
- feedback problems
- Antique Electric Supply
- Highs
- ELK bass amp, mono, twin OPT's (?)
- Anyone have a "handle" on the Yaqin EL34 X 2 SE AMP?
- Suggestions on books
- Cathode stripping in low voltage tubes
- Current to overcome 6.5 uuF input capacitance?
- Help me to work on the damping factor of my 845 SET
- Y A A B - Yet Another Aikido Build
- Music Angel - Help wanted
- Calculating PS current for octal Aikido
- X-10d
- wirewound vs standard pots
- Anyone famaliar with the 485 tube?
- Ideas for ground plane/shielding?
- TESLA E88CC 6922 Tubes shorting out???????
- Will My Ipod Benefit Through a Tube Amp?
- PSU for testing circuits
- easier way to cut a square hole for xmfr
- Combine left & right for sub
- Noisy Squeal from SE amp
- Plate Choke calculation
- Audio Cable Deathmatch!
- tubelab PP?
- replacing op-amps with thermionic valves
- aikido heater
- Heathkit W 5M output transformers
- 6S19 Circlotron (OTL)
- Quality of Hammond 1600 series transformers and a question about loading.
- Kuei Yang Wang's 6sn7 linestage
- Laney TF-200 speaker farts out...
- E-mu 0202 + audiotester
- Where to buy HT toroids ?
- CJ 1.4: Power tubes are working but drivers not ! Help please.
- A 6SN7 direct coupled preamp & regulated supply for everyone's perusal.
- Slight hum from my new soldering station.
- phono stage
- 6sn7gtb problem
- The old man told me to get it all out of the basement
- The Look of Preamp Hum
- hookup wire options
- Tubelab Simple Se Trannie Shopping List-a Newbie Seeks Info
- Testing Amplifiers / Pad
- Volume Pot vs Stepped Attenuater
- Which tubes should I use?
- KT88s and grid current
- Gain stage with g2-feedback.
- K-502 Left Channel is out
- 12B4 help needed
- Power Trans question
- Noob amp wiring question...
- 5842 - russian ripoff
- Ruskie tube questions
- Opt placement
- 807 AB2 oscillation maybe?
- Amazon Does DIY Parts
- Shielded wire
- Guitar amp(s) for nephews
- Questions about Tube Amplifiers, Mikael's vs SimpleSE
- duncan psu simulation vox ac30cc
- Where low noise resistors matter
- funky power supply
- Choke loaded PSU versus VR tube regulated PSU?
- What would most of you do?
- IRFBC20 as source follower drivers for EL34s in AB1 PP
- first post, PS for 6em7 SET amp
- affordable transformers for KT-88's
- Need help with schematic
- How many people here use simulators, like LTspice, to help design tube stuff?
- newbie question regarding gain reduction
- Anybody did try this tube preamp ?
- Heathkit UA-2 output tx wiring question
- Question about the properties of "matched" tubes
- Using a passive direct box to kill ground loop noise?
- magnetized power transformer!
- Utc A-24
- lower cost options for spectrum analyser/ function generator?
- Need schematics for Val VP-110S Tube Amp
- So What now
- What other tubes can I use this OPT for?
- Super Junkbox 6S19P SET
- Grid stopper resistors
- 1959 Pilot AA-908 Amp into Guitar Amp
- Please evaluate my new EL34 Amp (waveform attached)
- Max voltages for EL84?
- Tubelab SE finished but need help.
- Oscilloscope Probes for Tube Work
- ECC88 vs 6SN7
- Good (tube) audio shows in the US?
- Please help me de-hum my new pre
- Help for newbie
- Simple ReAmp Mod? Help with Input Impedances, Please!
- Which of these two phono stages
- Crosley radio
- Small tube amp for headphones/computer speakers?(first post)
- Peculiar Fisher circuit
- Hum in Grounded Grid Pre
- Counterpoint SA-1000
- K-502 How to select a potentiometer
- What are these Christmas light things?
- a CHEAP integrated tube amp kit-anybody?
- My amp is acting like a transducer!?
- Transformer current question
- Brimar date codes?
- Home made SE 300B amp
- Parallel Push Pull 6AS7 or 6080
- random crackle ? (McMartin MA-20)
- KT88 filament failure - twice on same socket
- Solid State Regulator for tube amp
- Proposed screen-drive amp design... comments, please?
- SimpleSE PCB out of stock
- Any good explanation of Passive EQ Filters??
- terraplane 300B
- Sun Audio transformers
- Vacuum State RTP5.
- Schematics for Audio Innovations s1000 pre
- Tube amp for newbye
- 3C24SE amp...
- Meixing MingDa MC767-RD
- confusing transformer connections
- Have to mod K-502 to 4Ohms from 8
- SOund of 3B28 vs. 866A
- S3E Vacuum Tube
- Tube audio & "3 dimensionality"
- Darling monoblocks
- Testing 350B with B & K 747A
- Interstage transformer for balanced amp question
- Filament transformer questions
- dBm or dBV Audio Voltmeter
- VTL MB250 Signature monoblock Manual..
- Choke phase spliter
- Output transformer DC resistance..
- Chassis layout?
- Jolida schematic questions
- Tube Phono preamp kit?
- Does size really matter - SE Output
- 437A testing
- Tube Amp reverb noise, no vibrato intensity, unknown model. Help please
- What to do with a 5k output transfomer?
- adapter?
- Studer 52
- Safety ground question
- Old PS questions (EL34 replacement), and any Aus people know BWD?
- Darling 1626 amp
- Blackheart 5 watt
- What is this tube amp
- Extry, Extry, Blind Squirrel Finds Nut -sequence
- Why is distortion harmonic?
- Source for OPT
- EL34 to RL12P35 converting
- calculating total current draw
- Allied Radio (Knight) KA-55 schematic
- 6F6G Amplifier
- good book/article about using oscilloscopes?
- how to attach photos
- Is 450V the max of triode strapped 6l6gc
- Separate power supply - Umbilical Cord
- tube amp being weird -- any ideas
- need to discharge psu safely
- Jadis DA7/defy power amplifier mods
- 5.3v on 6SN7 filament?
- The Valve Wizard
- Mercury vapor rectifier tube question
- An Indiana Yankee in Putin's court.
- Switching over to a fixed bias
- Dynamic load line analysis using music and speaker load
- Capacitance in PSU
- preamp line ctt
- Genalex KT-88 reissue
- Combine EF80 with EL84
- 2A3 maximum plate voltage
- Amplifier Response Stability & All That.
- 100k linear pots, any idea?
- 6550, 6L6, or 6V6??
- grid-stopper resistor
- cathode bypass caps suggestions please for newbie
- Need Schematic-H&K B.A.T.T.
- 6EJ7 phono preamp?
- Impressions of the Ella, a pp EL34
- 30L15 / PCC805 - What can I use them for?
- Ultra Cheap transformers?
- Push-pull output impedance
- Tube amp cost
- 830b
- Leak Tl/12+
- Toroid Trafo as choke
- in search of a 3c33 dual triode.....
- Question about MiniBlok II Schematic
- Wavebourn Alligator amplifier
- Best Tube Testers?
- Rusky version EF86
- Melos SHA Gold Issue
- Tubelab Simple SE & Edcor
- Erratic tube activity
- Bogen Front End
- Maybe a Ruskie
- Another kind of hybrid
- Output impedance
- GU29 Amp. Schematic - Audioromy or similar
- Power On Indicator Light
- Newbie Aikido power supply question
- Se output transformer question
- Aikido hum
- Output transformer replacement... Worth it?
- Almarro A205A schematic
- Valves World question
- diodes before plate load
- power tubes..newbie question.
- Need Help 12BH7 Tube test.
- Tube Virgin
- Chassis layout help
- Maybe this is why 300b's dont last as long
- High-voltage bench power supply
- Ebay Tube amp buy disaster
- HK cheap SE OTPs...hmmm
- Modded ST70 Done
- bad buzz in an EL34 amp
- Another radio->Gtr amp mod question
- yaoin
- What is the safest method to plot characteristic curves without ruining the tubes
- Screen grid zeners; which?
- Another one I don't get
- 6BG6GA adapter instructions needed
- got an EC8020