View Full Version : Tubes / Valves
- Best way to solder gold-plated components?
- Phono EQ hiss/white noise!!!
- help needed with grounded grid CCS upgrade
- Resistor wattage?
- SCORE! Kepco Tube Power supplies!
- 6SN7-2A3 SE Amp - James Transformers
- Capacitor explosion.
- JJ ECC81/12AT7 Longevity
- 6V6GTA Tubes, H/K A300 Transformers, Now What?
- DIY valve radio
- U600 rectifier valve datasheet, please !!!
- Capacitors
- please help ! 5687 cd player buffer
- LK-72 mis-wired or am I confused?
- Need help with tube ID.
- spud amp 6c45pi vs 5842
- Air gapping transformers
- Voltage Measurement
- Cornell-Dubilier Caps Western Electric 91A Amplifier
- My take on a modern ST-70
- pls suggest a project
- Help with input stage driver for EL84 output stage
- Trying to make sense of the Sweet Peach
- Cornell-Dubilier Paper In Oil Capacitors
- lm3886 + cathode follower PS problem
- Completely differential amplifier final stage
- Capacitors in series for coupling?
- Help needed with messed-up-amp repairs.
- 6DJ8 tube schematic as balanced line stage?
- 6DJ8 (balanced) tube line stage
- Knight amp circut voltages
- Make Mono Phonograph into Mic Preamp?
- Yet another passive attenuator
- What tube is this?
- El Cheapo ok for a first build?
- Anyone in Vancouver with a tube tester?
- How long can I expect a tube to last
- Output transformers... which one...?
- My MA845 modded and questions
- Sun Audio SV-2a3 HK Clone
- departure and tube slop
- Wire construction for capped tube plates
- Grid resistor location
- Meng Yue X1 trial
- Yarland pro845
- Faulty 5881 tube ?
- MF Xpre - help pls!!
- Heaters Voltage
- Pleas help identify this McIntosh valve amplifier
- Curves for Triode Connected 6EW6
- microwave oven transformer..
- Marantz 8b tubes
- Request: The schematic of Audible illusions MODULUS 3
- How many watts are really needed?
- Worn Tube Rectifier
- Bogen CHB35a Problem
- 29KQ6 Datasheet
- Help selecting a thermistor
- Beard P.101, new-to-me.
- Audioromy 838 Amp Broke need help..
- Inexpensive Guitar Amp
- How to Read faded Tube Numbers
- Test data for 6H30PI & Hickok 539??
- Tube Text books "Reich"
- PCL805 parafeed SE idea + question
- 12V driver tubes for Engineer's Amp?
- >200W with 6BG6GA
- Leak stereo 20 modification
- Baby Huey components
- Monstrous 1kW amp!
- blue glow, how?
- Using different transformer taps for each needed B+
- Heating DHT Cathodes a new way???
- Noise problem in 572-10 PP amplifier
- Power transformer question (Bud?? calling Bud)
- Identifying 12AX7 Tubes
- PAS3 to volume pot
- 5F6A Amp build help (Fender Bassman)
- Jean Hiraga SE KT88
- ASC motor run caps....can they be mounted horizontal???
- Millivolt signal and tube sockets
- 6N1P Data sheet differences
- Confident in buying tubes on ebay ?
- CCS Troubles
- Mengyue el34b schematic needed
- safest way to power up a new build
- Phono amp Raytheon 6418 tubes
- YL1350 Help characteristic and output tranies
- EL84 PP using 5K plate to plate primate OPT
- VR tube flashing?
- Tabletop 12au7 Amp
- Renovated website: www.pmillett.com, www.tubebooks.org
- Troubleshooting Eico HF-85
- Custom chassis europe
- Mixer from pre-amp design
- SE Output Tranny - Dumb Question
- What Tube for a Differential Amplifier?
- Thinking of buying a Lumley Reference ST70 with attached passive pre
- Psu
- Protection of the Irreplaceable
- Trix T621 PA amplifier (British)
- Resistor types ??? (carbon or metal film)
- First Amp Build
- Help ID these little PP output xfrmrs?
- Rectifier voltage drop question
- dc and ac heater supply in Aikido
- Can I obtain a suitable B+ voltage with spare parts?
- Multi tap transformers dont use the whole windings?
- First layout with spud
- EL152, GU50 and EL156
- Convert a 110 volt Mcintosh Mc275 to 230volt
- transformer maker list
- design a preamp, so easy....
- SRPP - determining load and balancing
- Idea for all C3g phono stage
- temp check
- Pentode Question
- K & K Audio Transformer phase splitter?
- Transformer Efficiency
- How to test a 6H30 tube
- Karaoke Tube Hi-end In The Future
- What makes the old McIntosh stuff so good?
- Paralell 10M45's for 71A DHT filament?
- Rod Coleman CCS/gyrator help
- Differential amp.Do they pass 2nd harmonics or reject them?
- A half 6sl7 tube
- failing tube
- Capacitor in series - Resistor across ?
- Tube preamp choise...
- Some general tube questions from a Tube newbie !!
- How unsafe is an Autotransformer?
- Can a dual triode use a common cathode resistor?
- Dared MC-7P
- SRC2496 Miniatube tube output stage
- Tubetech smc2b multiband compressor
- Tweaking/correction question - Xindak MT-1 balance
- HELP! ELNA CERAFINE 500V Caps
- Em87/ em84
- Pioneer SM-83 restoration
- Best GM70 version suited for audio??
- PSUDII transformer question
- what are these caps doing?
- Distortion VS OPT impedence
- Heater wiring approaches
- Rogers pops, crackle and static are driving me mad!
- tube power enough?
- Ever notice those scratches on some plates??
- JE 45/2A3 SE 2001 edition
- Difficult Time Finding Replacement Caps
- Mini tube output stage
- Mismatched Power Tubes
- Eimac 35TG amplifier glows !
- ECC88 Shield
- One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
- SRRP Output stage. Calculating power output.
- bogen chb-35
- Rating for resistors in power supply?
- Effects of Bias /Ammeters....
- pentode mode distortion 6LR8? George?
- Info for 6b4g PP
- Understanding unregulated PSU
- C3m C3g tubes
- More ebay craziness
- Shunt Capacitor
- 6021 Load Line
- TubeRiaa - How to calculate the impendance?
- Fake Vacuum Tube Amps - Funny but real
- 12.6v+ vs 6.3v+/- heater supply
- Distortion Measurements
- modifying kt88 pp ul amp
- Aikido help!
- Are Positive Grid Voltage Traces Necessary?
- New to Tubes
- How to read "Typical Characteristics" curves
- 12B4 pre output cap and LF instability
- attractive amp kit?
- Stereo 7O with transformer phase splitter?
- Filter Cap Recommendation
- New Guy...With a question...
- Interesting wiring guide find, thanks NASA!
- marantz 9's OPT data
- Why do my amps want signal ground and safety earth connected?
- scott 299c
- Tube Schematics
- JLTi EL34 and KT88 Amplifiers
- Radford sta15 looking for a nice preamp...
- Really subjective question
- Pen-toad Question
- Revox Model 40- leave it alone or dig in?
- Driver of Sumo Tubes PP for anybody: Shematic and PCB
- Output transformer from rowe ammi mm4
- Equivalent Circuit?
- 300b tube life
- CBS tube?
- Looking for a 700vdc supply
- Are all 9-pin sockets the same?
- Problem with short Test
- Troubleshooting 12B4/RH84/Akai project
- hi-end vacuum tube phono preamplifier
- PCB help
- QUICK transformer Question HELP
- Configuring an AB class amp to work in pure A class
- SCott LK-48-B balance pot
- lost a tube
- Lee Laboratory - model 50 Cruiser
- 1/2 of 12AX7 in single envelope?
- 2 pairs of 8150's
- AX84 Clean Preamp
- 8150 Tubes
- Capacitor/Choke value in SET buffer supply? (95 vdc B+)
- NJ Tube Auction
- pentode buffer
- Tube Buffer? 12ax7?
- What is this tube?
- Kits
- Power supply high voltage problems with Melos amp.
- 811A Class A2 with Power Drive
- Help ID this 12AX7/EL84 Console(?) Amp
- Eico HF-86
- Marantz 9 Filter CHOKE value??
- 10M45s: strange behaviour @ 100mA
- LtSpice - Russian tube models
- Before I buy KT88's
- Ultra Low Cost 6P1P Push Pull Schematic,PCB
- adding reverb to Bassman circuit
- 300B SE amp: One more one
- Already found problem with new amp
- LtSpice transformer - confusion
- OPUS 5.0 A Modern Mullard
- EL34 PP New Design of newbie
- Tubelabs SE vs. Simple SE ??
- Somebody knows about Lorenz e84l?(real Lorenz)
- Aikido Heater PSU help
- ecc99 with which Interstage Transformer?
- Looking for Audio Research Caps
- 2A3 SE Problem
- One knob tone control
- Tube Base Application ?
- The no-brainer project, some questions
- schematic request Yarland FV34AIII
- SY/Pete Millett Crossover
- Please don't stone me. . . .
- Golden Tube
- BH Curve & OPT choices
- Scott Transformers
- Identifying transformers
- Need Help understanding a triode fed LTP.
- How to measure and adjust bias
- Another cheap tube amp from China
- where to add master volume/gain/tone to Bogen L330?