View Full Version : Tubes / Valves
- Diodes to tube
- PL84/EL86 push pull
- circuit diagram
- Ultralinear operation
- 60hz hum in component system
- Crackling Amp
- Regulated Supply for Direct Coupled Amp
- Explanation wanted
- Dynaco FM1 stereo updating ?
- tube amp diy off. Is this a good deal?
- SE driver
- DN2540 + LM317 cascode CCS?
- Recapping old tube amp
- How a SRPP stage sounds like?
- Help troubleshooting SE Pentode amp
- What meter for Bias?
- Mains tranformer noise
- Tube tester block diagram
- got a custom 829b amp that i got laying around, need to know what driver to use
- Universal filament regulator
- ECC88 - 6DJ8 Cascode Plate Curves
- Gain of Phase Inverter
- CF/CCS, can it be made simpler?
- 2A3 Heater Hum Pot
- Need help - black out while the amp. was on
- simple question about cathodyne PI
- Where can I get a cover for the OPT and PS
- Power supply for heater
- how to use oscilloscope
- I am collecting parts for my 200w mono amps "But"
- This seems wrong?
- StoetKit Junior Schematics
- Valve Amplifiers 3rd edition Errata
- Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
- 6v6 datasheet
- Leaving filaments on?
- output caps -- your observations, pleeze
- Low gain preamp.
- Recommended Tube/Valve references?
- Stand Alone guitar power amp
- Tube Socket Identification
- Some agreement on reasonable affordable and well performing design builds?
- Fletcher cooke OTL article
- I have 4 Pl504's. Are they best used as SE or PP ?
- More k12g amp musings
- How preserve loudness circuit with new volume pot?
- Where to find 212E tubes???
- Music Angel XD-SE EL34 Amp
- CV345 VS EL34
- Reducing Filment Hum in Tubes
- push pull power amp
- 6 ohm speakers....
- Need a 12.6 VDC power supply schematic
- Gold Lion KT88 Issue
- Plate currents in P-P
- Bass preamp + Edcor balanced out = HUM!
- Testing amplifiers with computer software...
- Welborn Labs - Abysmal Service
- Repairing broken pins on valuable tube...
- Explain how feedback affects DF?
- Low emissions
- Tube Blue Glow question
- Common-mode choke before or after?
- 6l6 data sheet question
- Mic preamp
- Physical Tube Diagnosis?
- how and why power amps clip
- 80's Guitar Amp...replacing o/p tubes...which 6L6 should i try?
- Vacuum Tube OTL power amp!!
- Tube replacement options.....
- balanced RIAA amp
- power amp distortion
- Suggestions for 5k5 40W iron?
- Peavey Classic 30 Reverb headscratcher...
- Schematic Tube Analog Output Stage???
- 300B 'direct drive' using a 6U8..
- Magnavox 88-02 power trans ratings?
- Preamp with humming noise!
- How to choose line out transformer?
- Tools for Cutting Tube Socket Holes?
- Switchable SE.
- GZ33 in place of 5U4 can it be done?
- phase splitter issue
- Armstrong A10 MK2 EL34 mono block
- "Ug" The Transformer
- i think its time i start playing with caps
- problems with preamp on home brew
- LS180 Tube Socket?
- simple question - 5V heater power supply
- Lineamp
- FI AUDİO 421 A
- Pete Millett has another Red Board for sale
- Jolida JD9 Problem
- 6N11 = 6N1P ?
- K12-G tube amp problem
- Please vote for one of the schematics.
- Advantages of separate PS for input and output stages
- Another PCB tube amp design
- Help. Replacement OPT sqrueeechhh.
- New concept of a power amp
- Lundahl and rectifier mismatch?
- Resurrecting weak tubes
- Best DHT heater?
- Help requested for EL84 SET amp
- What did I buy??
- Edcor and Custom Power Transformer Design
- What would you make with this power TX?
- Lundahl 1676
- DHT for 300B problem
- Newbie question about output transformer to speaker matching
- Red board add-on phono/RIAA pre-amp
- 2 Chassis amp
- Is It posible to bridge two quad II monoblocks?
- Power tube at work picture
- Tube SE power amp , which one??
- Hickok 539A issue
- Noise in one channel? Pioneer SX-400
- Hartung / Prestla OTL amps
- Lafayette Model 417
- Extreme plate load
- What do you think about this idea
- el84pse schem, need advice
- Video pentodes as outputs
- Custom Vibrolux Reverb noise issue
- Chinese "Audio Research" KT88s
- Fender bandmaster rectifire problem.
- New 6C33 Socket
- 2a3 PP output transformer
- PSU problem - Murphy is an ***hole!
- Best SET design?
- Anybody ever tried EBC41 as 12AX7 substitute?
- The 7242
- 12bh7a
- Phase Splitter Help
- Oscilloscope Question
- sizing opt
- 6P3C-E Datasheet help
- on the toroids again
- OPT problem or Something else 6L6 PP
- Look what I found!
- Help, Diy tube amp
- Idea
- a few DIY tube amplifier setups
- 6L6 PP amp motorboating
- Mayer-inspired 4P1L
- 6L6 WGB 2X34W STEREO AMPL
- Isolation transformation wiring project help
- Tube Amp DIY or Retail
- Supplier for GU50 tubes
- 2E26's
- Encel Stereophonic M.F.B CSM 40 amplifier
- Mono 300B SE Amplifier
- Broken tubes for 3D Modelling
- Loud hum in one channel
- 6EM7 PP question
- 12AU7/IRF610 Hybrid Amplifier
- 12AU7/IRF610 Hybrid Amplifier
- RIAA preamplifier
- Classic amp, Chinese or scratch-build for Quad ESL?
- CLASS A TUBE AMPLIFIER FOR TWEETER
- How to gap output transformers?
- Cathode bypasses - partial bypass and combination bias
- Phase splitter
- YS Audio balanced Preamp
- Low voltage 12AU7 (19J6) -- re "starving"
- phase splitter
- JTM30 output transformer
- Music Angel Meng 6P1
- Is it possible to dampen a partially microphonic 12ax7?
- anyone built the matchless hotbox?
- Pioneer SA-810 tube amp.
- 6C33 D.C.M.B. - Paging Ari Polisois
- Whose is this logo?
- What is grid resistance of 807/6l6 in pentode
- PAS Upgrade Boards by Epperson
- Bang and Olufsen 609k stereo se el84 fm tuner
- Finished EL34 tube amp... but oscilates weird..
- Scope Trace
- Drifty tubes
- Choosing plate voltage
- Determining Zout for SRPP
- PX25 amplifier - thoughts?
- Testing Ck5703 tubes
- When can screen voltage be higher than plate???
- 31AL10's
- Lafayette TE-50 Tube Tester
- Acoustic (not Audio) Alchemy - I need a wizzard
- current feedback
- dac with tube buffer/preamp
- Sowter 3607
- Back to Loftin-White
- What to build? (I have a lot of parts)
- Grounding chassis through RCA
- K40Y-9: Questions And Comments
- buffer line stage schematic
- Dual triode Thanks for the pre-attenuation link
- Help With Alps Volume Pot Noise
- 6AM4 driving 45???
- Franks 6sn7 line stage question
- Edcor power tx XPWR035 issue
- Recommend me a schematic for El34 or KT88 ?
- RH84 Power supply
- Pentode driving a SE triode? any experience?
- Big tubes thread
- Meng Yayi KT88 MonoBlock
- Old Dumont Console - Story and Questions
- Newbie GlassWare Aikido All in One Questios
- Building my 1st tube amp
- A good tube for my SE 5K-8 OPT's
- 6c33 - ready, SET, GO
- Noisy tube rectifier goes quiet when i put my hand NEAR it
- Tweed 5E3 Deluxe Project Problems
- Strange ancient looking tube amp
- Vintage Dynaco vs. Triode Electronics
- LINE PRE - 6N9S - 6dB
- Can I balance a diff stage like this?
- Ways to design for low IM distortion
- Genalex KT88 Plate Dissipation Question
- difference between SE and PP transformer
- I put a bad ouput tube in my amp, did I hurt it?
- Vox AV 100 Mk2
- Stereo amplifyer project
- 6sl7 6sl7 dynaco driver board
- PCB for stand alone 5W SE
- Triode VS. UL bias
- How to test a DIY amp?
- Morgan Jones 4th ed
- How close is too close when designing an amp
- Fatman I tube Problem
- 807 p-p tube amp schematic
- TUBELAB SIMPLE SE
- Listen to 6DJ8 Triode through Power Chip IC. Easy project.
- Cheap motor caps(MKP) vs Electrolitics
- James O/P Tx
- Ripple reduction with added voltage compensation to HV
- SEVETLANA "SV" 6550 C vs 6550 C
- Frank's 6SN7 - plate follower, noise
- Help running RH807 at higher voltage
- Preamp hum issues
- EML mesh plate 2a3 in DRD amp
- How to run RH807 at 400V?
- Preamp Umbilical - Use Shield as Ground Lead?
- Automatic Bias Control sliding bias
- Edcor Output Transformer Resistance
- Would this be worthwile restoring?
- Historic Tube Amplifiers
- 6HF5 testing
- A quick question about NFB
- PAS3 - are the tone controls really *that* bad?
- PP OPT in SE mode operation?