- speaker driven reverb
- Orange Rockerverb 100
- Mixing power tubes
- Measuring wattage
- Blender pot on effects?
- primary impedance Gibsonette
- Amp Builder new on the scene
- Output tube impedance
- Fender AB763 Style Optocoupled Tremolo Circuit Question
- screen supply pot?
- Loading a gain stage with a constant current source
- Reverb 12AT7 Tube Heat ?
- Voltage dividers - calculating resistor values for tube substitution?
- Is 2 Watts enough for power resistors?
- My Vision of the Future Guitar Amp
- Amp to Speaker/Cab Simulation - Your Experience?
- reverb tank in/out power?
- SE versus PP
- Donor power section question
- active mosfet screen voltage dropping resistor
- Question About Gain Stage of Ampeg r212r
- Strange Standby Arrangement
- Cathode Bias current draw
- Power reduction
- Presence control barely adjusting presence
- Mystery OT and impedance help
- Post PI buffers........
- 750 volts too much for 6l6GC plates? (need big PA advice)
- SLO100 parallel channels
- Tweed Twin Design
- Max signal input to a 12AX7 (or any tube)
- Transformer based Phase inverter for a small PP amp
- Tapped screw holes?
- Music Man RD-50
- "power scaling" or attenuator
- Milbert OTL 5lb tube amp auto everything sound clips
- NFB shielding?
- 12 volts filament supply
- DC Filaments, any cons?
- replacing transformers with lower rated units
- 5e3/AC15 mod
- Series Diodes w Parallel Caps
- 6X4 output voltage
- Single tone knob question
- Preamp Gain stage Impedances
- Matchless dc-30 reverb schem?
- save bias supply
- mosfet split load PI?
- Standalone preamp: output impedance/buffer question
- higher voltage on OT than originally called for
- Old newbie looking for help on 12ay7/EL84
- Determining OT specs?
- Presence control
- Obscure Tubes for Guitar Amplification?
- newbie here with basic questions
- Does anybody know a good transformer winder?
- Question from a new member - Basic Theory
- Split-load vs. long tail pair: Tonal/Vibe differences?
- Cheap Current Source Drivers
- Paraphase confusion
- Choke tail phase inverter
- 4 channel leslie amp...
- Switching Noise
- Need a little insight about a fender prosonic
- Any 8X El34 amps here?
- Fender Reverb Mod Questions
- optocoupler to replace mic for tube amp
- Need help identifying location for standby switch
- unused PT filament windings?
- Old Wurlitzer Iron for build?
- running multiple heater supplies in parrallel
- uCU based bias supply
- The "best" "small" amp?
- Mesa GEQ Inductors - Gyrators
- single ended output - hammond 125 SE?
- Equalizer
- Voltage needed to drive power tubes
- Power Transformer sizing..
- LED power supply
- popping switches everywhere!
- Need some help with MOSFET oscillator design
- Sustain - Grid Blockin or Anode Clipping
- 7189A guitar amp B+?
- valve jr to champ
- BOOK REVIEW: Design & Construction of Tube Guitar Anplifiers.
- Mesa Mark V Schem Available!
- CF recovery stage - essential or not?
- help with 3 channel preamp design
- Rare PT Find - what to build?
- Ultimate ground switch
- ohm's law in practice
- Resistor values in a LTP PI - affect on tone?
- managing inrush current advice
- How to analyze distortion
- Heyboer site
- PWM amp with modulated rails
- B+ too high
- PI for lotsa drive, little supply voltage
- Auto everything 5lb 50w tube amp?
- Determining necessary bias voltage from tube data sheets
- Stretched waveform
- anyone ever find this usefull?
- Back-to-back transformers + bias tap voltage doubler. check?
- ampeg ba210sp bass amp
- Another new book
- 4-6v6 OT?
- Rewiring V1, which schem...?
- 6G12-A Concert w/Reverb?
- Grid clipping or ?
- Old Trannies
- filter caps in 5f4-How much is too much?
- preamp gain question
- help me read this!
- Where do you spend the money?
- SE transformer, air gap?
- Shielding Plate Wires
- Voltage doubler ripple
- odd circuit ideas
- Heyboer Transformers
- Power supply schematic? please critique.
- Hello all and circuit design questions
- drive the tube hard or clipper fuzz ?
- Effects of chassis material
- Duncan Tone Stack Calculator
- channel switching
- add SE PA to PP amp
- Low ESR Caps for Filters
- Another SE amp - transformers
- SE 6L6 Harp Amp Design
- why is BF Bandmaster cleaner than BF Bassman?
- 1700ohms primaries for a 2XEL34 + 2X6L6 amp running about 450V?
- New member!! Whoo!
- "Class A" nonsense
- Voltage Adapters as power supplies - Safety?
- LED Power & Standby Indicators
- Metal Oxide vs Wirewound Resistors
- BF Princeton - aa964 / aa1164
- Heater in Series w/ Cathodes of Power Tubes?
- Fender style ldr/neon tremolo
- Cap-Driven Reverb?
- Another PI question...
- Phase inverter capacitor?
- Review? MOSFET CF & "Mix" control
- Guitar Amp Schematics
- could the B+of 12ax7 only 15 voltage
- Do I need add spring reverb in 5w class tube amp
- Volume leak with bootstrapped master volume
- feedback in VOX Night train
- fender style pilot light fixtyres
- SE amp with 6550 tube
- Changing the load resistor in the cathode follower
- output trans impedance
- fixed bias
- Needing help with tremolo
- Fender's Peak Music Power = 2.2 RMS?
- OT protection diodes SR-2873?
- High power bass amp
- best designed single tube reverb
- full-wave rectifier, fuse in centre tap
- Bass Tube Pre-amp Project VU Meter Help
- 5F6A + 'blocking' distortion & Grid Stopper trials
- No EL tube amp - PP film filter caps
- unidentified PT, how to establish what wire is for what...
- Autobias amps
- Preamp cathodes - question...
- heater to cathode voltages
- Bias vary trem with triode outputs
- Peavey Spring Revreb?
- How many watts am I really using?
- Where are the really old Fender Transformer specs?
- Series / Parallel Heater Combinations
- Two Tube 'Verb for Tweed Bassman Amps
- Designing my first tube guitar preamp: a few questions
- Transistor question for Enzo
- How to reduce 'blow'??
- Multiple inputs - question
- Reverb driving methods
- Bias vary trem & Fixed bias - what optimum combination?
- 1700 ct OT and 6l6
- Carbon comp applications
- Metallised Polyester Capacitors Installation direction
- Building a traynor based clone
- I'm back, thinking about 6550s in a bassman chassis, opinions?
- Solid State Guitar Amps book
- Output Power
- Transformer Cans
- Yet another post about Cathode Caps!!
- Great Article on Shielding
- componet package? and Eagle 5.60?
- exotic tube bass amp
- PI resistor question
- Tone stack values
- Dumble Bass knob not working
- Characterizing mystery OTs
- Recommended books?
- Tilt Control - Use with Tubes
- The loudest amp in the world?
- Hammond OT/PT pairing question
- Coupling caps- can you explain them to me?
- James/Bandaxall question
- Amp switcher box, multiple amps going to one (or two) cab
- Amp switcher box, multiple amps going to one (or two) cab
- switching between UL and Pentode
- Global NFB resistors & EMI
- Lowering preamp gain via bias or split-load resistors?
- new CP audio pots <$1?
- stripping shielded cable
- peavey vk112/tonelab le question...
- Using Op-amps as reverb driver / recovery
- Gibson GA42RVT revised schematic
- Treble pot: is this odd?
- Wattage...
- Can you have too much filter capacitance?
- Voltage on 1st cap goes slightly over 500V when on stdby... dangerous?
- Hi/Low Power Switch ?
- adding DC heaters to preamp with a center-tapped trans
- Grid resistor question
- How do I calculate guitar amp output power
- I made a few changes to my AA764 champ but
- swapping Vibro Champ & MM Bass power sections
- Thinking about a cut-rate "champish" design. A few Q's
- Tremolo to Panning conversion
- Question about phase and pots.....
- I need to stop going to the surplus store...
- plate R value and PSU voltage question
- Alpha pot codes?
- Lots of capacitor questions...
- Anyone else confused by pot types in Duncan's Tone Stack Calculator?
- My new creation: 8W Baby Marshall! 6K6GT = low volume big amp sound
- Question about voltage ratings on bypass cap
- a few reverb questions
- Does 5E3 have crossover distortion?
- Mylar film/foil caps 600V for Tweed Twin
- Ultimate Tone ?!?
- Sovtek 5Y3GT and Sovtek 5V4G?
- Ohm's Law and Power Slide Rule
- What are the differences in tonestack circuit placement?
- output transformer suggestions????????
- Limits on amp power?
- GZ34 Anode Series Resistance
- 5F6A verb & Trem revisited
- EL84 + 6L6 in parallel in same amp! 3.3K primary?
- JJ load lines?
- Bandaxall: cathode follwer or plate driven w/ gain recovery?
- How to add a mid boost...
- Hammond Impedance Selector Switch
- Looking for ideas on how to make NFB vs no NFB infinatly variable
- Bias measuring resistor(s)
- ECC832 Driver and Conertina
- Selecting Reverb Transformer