- Coupling cap. values???
- stepped attenuator
- Ideas for input/driver stage of 300B amp
- Schematics for Bogen MXM-A Mixer?
- yet another which cap is best for the money question
- Lowering the value of the lead resistor
- power supply recommendation for EL84 amp
- Can ECC40 be used in a phono stage?
- Better current source than LM317 on a 12B4 line amp
- Bias and max current for my 7591 AB amp...
- Making sense of the Aikido calculations?
- Computer Grade Capacitors
- Pls recommend a power amp to build?
- Advice about this 45 amp
- Any definitive infor on R-C parafeed out there?
- 6AS7 as rectifier tube?
- Pre Amps
- 12 volt preamp
- JE LAB's 2001 2A3 & Preamp???
- 12AX7WA
- found DIY amp - now what?
- Magic Eye spectrum analyzer
- Tube Companies
- B+ from GZ34 Heater CT ?
- Unknown mA on Gardners mains transformer
- PSU Question
- how to mount rca jacks and volume control in wood enclosure?
- Freaky Whistle in Guitar Amp
- Giaime's last nightmare - aka RIAA faceoff
- 5687 dc 5687 tube amp need help
- Input cap needed
- 6BQ5\EL84 line amp
- Capacitor Values Why so high? & What can I do?
- Bias pot question
- What I have: 4 Tubes. What I need...
- let me fix this bias
- A small no-fuss pentode/pentode SE amp
- Bleeder Resistor Placement
- Modifying Heathkit AA 151
- Interstage transformer for PI.
- Motorrun caps ... GND side?
- mono center channel out to stereo
- Audio Research REF 2 MkII
- 717a plate volts
- valve preamp criticisms?
- LOT of tubes. what can I do?
- substitution for 7355
- KT88 heaters
- Software for drawing tube schematics?
- Guitar Amp HUUUM with an MP3! Reverb Problem
- New books posted
- Compound bias
- Tube Oscillation or Microphonic Question
- WTB:OT for el 34 35 watt tube amplifier
- Questions on 6H30 simple PF?
- "Super Davohm" 1w .1% wirewound
- Heathkit AA-100
- 6159 for SE Power amp
- Do SMPS have a home at high end audio?
- Kofi Annan in: "300beee!" or "Kofi Gets a Toy"
- cathode capacitance on anode follower
- looking for a building shematic for ECLL800
- Iron learning.
- Tube Amp - Crackling Sound on Left Channel
- Pspice preamp simulation
- Supply voltage for 12v6 12B4 heaters
- Studio Tube Preamp
- New project and my first circuit...
- Champ clone fried my soundcard
- Choke coupled phase invertor
- long cable line drive
- What To Do?
- Simple Method To Measure Source Resistance?
- is this true????
- query on the PSU of a preamp
- Meshplate Help needed
- 6072 tube preamplifier.
- hybrid rectifiers and PIV rating
- transformerless amp help plz ...
- Help me build a tube MIC preamp plz
- chinese 845 amp blowing fuses
- Question about PIV rating of diodes...
- Triode strapped heptode?
- The Fisher 500C/800C Challenge (long..dialup warning)
- 5 wire output transformer
- Orcad & tube library
- Wall Wart Tube Power
- How can I lower B+ of power supply?
- How do you put a CCS under a diff. pair of DHTs???
- Just need to make sure.
- restoring a marantz 7c
- Who sells a tube bass guitar amp kit??
- What is Simplest and Best 6L6 PP circuit? (PK)
- Good DIY Transformer Article (in Thai)
- Tube Swapping Question
- Toroid choke question
- Pentode CCS for parafeed SEP??
- subminiature tube suggestion
- MQ431 or Triode's DynaClone
- Conrad Johnson MV 45 schematic help
- signal wiring
- NEW B Need Help on Output Tx Problem
- center tap of heater winding
- Dynaco Mk IV question
- Does this tube amp has enough cap
- Acrosound TO-330 output transformers
- PP transformer for SE use
- Holiday Time!
- another beginers first amp thread!
- Western Electric 374A
- Musen to Jikken 03/1997
- Please help me make a schematic
- Tips for Hakko 936-12
- AC or DC for 300b Heaters
- Two irons for PSU
- Which DHT for Line stage?
- Pye Mozart 10 amplifier
- I need a simple schematic with 6J1P tubes
- First tube project. Need advice.
- Sound Valves M-40 assistance
- Has anyone been keeping up on the 'New Sensor' Controversy?
- quad esl output transformer.
- penta labs?
- New Build (Guitar Amp)
- transformer links
- EL84 auto split
- TOPWARD MODEL 605 operation manual & Schematic
- PREdator, Diff/CF linestage.
- Triode Electronics ??
- Full Bridge Amp?
- Tube literature on pentodes + transformers
- so, who made General Motor's "AUTRONIC EYE" tubes?
- 6DJ8 Linestage
- Annyone seen this problem?
- psu to heater on 4 el34 tubes???
- 6C33C-B, Reliability--A theory........
- Sun Audio preamps
- Anyone Use A Harmon/Kardon XT-2 Xformer For MC ?
- Carver Phono
- Help With 3 Channel Magnavox
- simulation software
- trickle charge psu?
- tube filter
- Holiday S-5 K-12G
- Couple of (newbie) tube questions...
- valve buffer gainclone
- Series wiring for heaters
- DIY tube cd player ?
- Tubes in mp3 players?
- Output Impedance?
- Hum Pot Question
- Which 6AQ5
- White flakes in rectifier tube??
- Bogen V20 PA Amp Schematic or ?
- 12a?7 in Eico HF-12
- Home Made Tubes?? has anyone made one, is it possible??
- replace 6N1P with 7308
- Plate choke on a line stage?
- Looking for datasheet
- 811A SET Monoblock physical layout suggestions
- Automated bias
- OTL or parafeed?
- tubes: Jcm 900 Slx 50watt
- Reversing mains toroids for HT
- 5881/6L6WGC and 12AT7WA replacement
- Direction for Mounting Transformers
- Ecf80
- feedback phasing
- Cryotubes? Cryogenically Frozen valves
- European Triode Festival 2005
- PSU capacitors
- Question on shared rectifier / signal tube filament windings
- Heathkit rebuild or...?
- Fisher 500B OPT/Feedback Questions
- Transformer selection question
- Grounded Grid Help
- EF86 penthode
- Any audio use for ER21A?
- Upgrading a sonic frontiers SFS-80
- Hum problem
- low frequency oscillation in 12B4 linestage
- Balanced volume control question
- Need Help for Power Supply for gg Preamp
- OTL 6c33c Ciufolli v8.2 low voltage rails
- Any way to extend OPT low-frequency response?
- RCA Phono Stage Redux
- About tube codes
- More Joules? Tube or Solid State PSU?
- EL34 schematic confusion
- 2-stage DHT: high-mu vs. interstage stepup
- Understanding this power supply
- 6V6G recommended schematic
- parallel CRC Filtering for B+
- 6v6. 6lg Gain Max Voltage
- More buffer questions
- Benchtop PS
- Chassis labels
- LM317 Regulator Problem
- Can I afford my SE amp ??
- 12B4 versus 6S4 for linestage
- Function Generator Probe?
- Otl Set?
- Tektronix TDS2000 series is a noisy scope
- vanderveen's 30W PP amp..
- Roberts/Akai M series amp problems
- What speaker to use with my tube clone
- What’s the best tube amplifier you can build?
- Cathode Follower Buffer Input Impedance
- EL84 as Preamp and as Crossover
- Wondering if Upcoming DIY design will work with Tubes? Cheap DIY Kits?
- EL 84 Single Ended Integrated
- "2 Stage" PP 7591 Amp
- Jolida 1301a with Mission M71 speakers?
- EL34 SE in 430V?
- EL 84 PPP/PP Class A Triode schematic
- Almarro A318A
- beckman berkley model 7360
- spice model for UL output transformer?
- Need help with my new amp
- Motor caps
- E88CC Mullard fake
- Anyone try sharp cutoff pentodes in a p-p output stage?
- 845 A2 Monoblock Project
- newb needs help on simple el84 amp PS
- Newbie's power supply woes
- Question about M7 Preamp
- Which amp to DIY as a first project?
- help for psu
- tube amp
- Will a 6BH6 work in an Aikido?
- Tubes and maximum ratings
- FireFly Amp Question
- help needed 1st tube diy
- Help for newbie building Toccata preamp
- Diy Orange guitar amp
- Hybrid amp -> tube for VAS stage
- I recently inherited a Heathkit HO-10 monitor o-scope...
- Laney PA amp help!
- Aikido tube choice
- Biasing pre-amp problem
- Help with identifying tube
- Off Topic Holiday Cheer
- Prototype preamp example
- PV10AL Transformer burned, help!
- EL34 Pentode in Push-Pull!
- Mcintosh MX110 repair
- Mains Transformer Question
- Loaded Question
- A BIG SCRATCH in my speakers? Help me please.
- New Production Tung Sol 6550 Tubes - Opinions