- Diode Rectifier
- Basic Math for Tube Amp Geeks
- A question about the 'gimmick' capacitor on my SF champ
- Marshall 1974x - Tremolo channel plate resistors
- Primitive preamp
- Oscilloscope for newbie...
- Ok gurus, answer me this
- Symmetrical vs Asymmetrical Clipping
- impedance question
- Fender OT Winding Questions
- Grid Current - an essay
- Power tubes too close to PT?
- Heater voltage too high
- Fender 6G15 Reverb unit, why use a 6K6 (6V6) instead of the usual 12AT7 ?
- Clicking/popping from footswitch audible on my new hybrid amp project, ideas?
- Some OZ history for your possible imterest.
- So what things can cause "thuddy" pick attack?
- 12AX7 SPICE Model Comparison
- Tube and schem question
- Floating shields
- Push-pull
- Different brands of power tubes!?!
- Understanding a Fender tone stack - low-pass filter
- Why was grid-leak/contact bias used in guitar amps?
- Reverb pans...WTF
- Testing with no tubes
- Transfer function of a gain stage
- Confusing Info on Grounding Layouts...
- Zinky Blue velvet 50watt head
- Cap storage and discharge
- Gain - common cathode stage
- Opinions on BW-Limited Output Transformers?
- Grounding two monoblock amps with common preamp
- Perfecting Fixed-Bias Cathodyne
- Dialing in the trem?
- Hmmm... What to make?
- Powr Supp Drop Resist
- balanced to unbalanced
- Spitfire: choke vs resistor
- Cap Placement
- Impedance question
- Choke question
- AC30 based ampdesign
- Max Grid Resistance - Preamp Tubes
- Choke Orientation
- Opamp preamp
- 807 Output Tube Project
- How can I get my 12ax7's to distort as good as transistors?
- Best OT Primary Z for 6BQ5 in AB1?
- impedance selection - best compromise?
- Has anyone here built a flat board amp design center?
- Classic Kustom Amp Input Sensitivity
- valve reverb questions
- Irradiated PVC hook up wire???
- Mismatched OT load - impact on frequency response?
- Marshall Bias Circuit Diode Direction
- Help understanding Carvin V3M power reduction scheme
- Suhr amp with 12BH7 ?
- Using two different impedance speakers
- two half wave rectifier tubes to make a full wave rectifier?
- Range of bias voltages for power tubes in fixed bias?
- MV in Plexi build. Supposed to sound like this?
- Paralleled triode first gain stage: Spitfire and 18 watt
- contemplating shared dropping resistor on LTPI plates
- 50Hz Hum in Plexi Build
- Security issues power switch wiring
- Noise, and how to minimise it, in a small signal pentode circuit?
- How to Avoid the Drudgery of Drawing Push-Pull 6L6 Composite Load Lines?
- small signal pentodes, no Ck, Cg2 connection???
- Converting 50W Plexi to 20W 6V6
- Getting a power supply from the heater windings - a long and winding road.
- kt66 datasheet specs
- Resistors to ground or in signal path before gain stages?
- Capacitors in series
- Help understanding varying power output measurement from tube-swaps in a 70s Model T
- 6v6 PP 20w Bias Voltage Range
- Marshall Super Bass Filtering?
- Cable for LaMar Mastervolume?
- Twin AB763 filter cap question
- bias supply questions
- grounding multiple choice
- What is Amp Bloom?
- Active Bias Circuitry
- Amp's tone changes when hot
- one question dealing with dropping resisters and filter caps
- Capacitor in Series of Earth Wire
- Can bias be that low?
- Ran out of black lead wire @#!%
- Panel LED using heater tap
- Elevated heater voltage on cathode follower
- Sound differences between cap brands? Test results?
- methods of removing oscillation?
- Looked inside a fender vibro king and....
- I was looking over a few things on my 6G2 build and have a question .
- Questions about a basic atenuator
- Can someone explain this PI in this amp.
- Merlin Bypass Implementation
- heres an odd one
- Anecdote about "loudness" vs. power
- Shielded wire for NFB?
- Grid Leak
- Spring reverb phase??
- Software for design/simulation of audio projects.
- Should I put an effects loop in a plexi build?
- MV, Powerscaling in 50W, 100W Amps
- running tubes in push-pull at less than max output
- how do you guys strip teflon?
- fender pro (pro tube) reverb
- high volume hum!!!!
- How do you attach wire and components to turrets?
- Second attemp at a hybrid amp.
- Bridge Rectifier
- Please explain resistors at power amp section
- Has anybody ever try the diode trick?
- power supply choke
- Is there a way to do this?
- Looking for a 8K:16ohm OT. Suggestions
- Removing low end mud
- Would this be an easy way to direct couple an output stage?
- Heater Wiring Do's and Dont's - Will This Fly?
- Building a JCM 800 preamp. Should I add a stage after the MV, like an FX Send ?
- Too much gain?
- What's going on in this peavey schematic?
- What does this 1k R do?
- NFB question
- Laney Lionheart's Dyncamics and Bite controls - how do they work?
- I have a long question about my P-P builds gain.
- PI input caps
- Wave shape of breakup in DC-coupled cathode follower
- on my Champ build again different question( adding a filter cap )?
- question about adding a 25uf bypass cap in parallel with a 2 uf bypass cap SF Champ
- Anybody ever tried zero bias with the screen and control grid tied together?
- 100W OT in 50W amp?
- Need advice how to hook up a switch to fender speaker jack?
- input capacitor?
- grid stoppers and scren resisters?
- Laney Lionheart - brightess issue
- Help with equivalent resistor/capacitor
- How to wire 4 x 16 ohm speakers of different types
- Output transformer research, for the benefit of mankind.
- Schematic Question.?
- 12A_7 Tube Shootout
- vox-style treble/tone cut
- Old timers: What's the first amplified electronic musical instrument?
- Merlins Preamp Book in its 2nd edition is out now
- How to wire illuminated rocker
- Who can explain this Peavey PI?
- Japanese Symbols in a Greco Guitar
- Solid State drivers for Output Tubes
- Cat Follow & Gain
- Cifte 12AU7 Tubes
- when measuring a SF champ cathode bias ?
- Top Boost Single Ended
- If I wanted to change my SF champ to adj fixed bias ?
- Now another question on the sound of a SF champ
- LTPI ?
- advantage of using a cap can?
- A Handy Cheat Sheet - gain stages
- Approximate AC to DC capacitor voltage rating equivalence? Other ideas?
- Parallel 12AX7 vs. EF86 (matchless clone design)
- MY builds voltages ?
- Tube Tone
- I added diodes between the rect tube in serier with the PT secondary HT leads ?
- What would happen if you connected screen grids to constant current source?
- Why do some tube amps produce better pinch harmonics than others?
- speaker jack shorting or not?
- Speaker impedance choice
- current source on Schmitt
- Now, take a look at this..
- What is the meaning of max dc ma ratings on single ended output transformers?
- I have a question on a build I did a while back
- Old Dual-Pro type dual OT
- 45v to 5v voltage regulation
- Anyone remember this???
- Ground scheme Q
- a quick transformer question
- Dual Bias
- I would like to know what one thinks of this adj fixed bias
- planning a safe in home low voltage hybrid.
- high side current monitoring
- intro to theory?
- Unmatched, different brand power tubes?
- Would this work? (adding gain stage on 5F6A)
- Fixed bias theory
- 12SQ7->50L6 SE design...request for comments
- PSE : can we share the grid-stopper and screen grid ?
- Wurlitzer 206
- Spitfire information
- Spitfire info resurrection
- initial preamp stage clipping
- Single Ended Global Negative Feedback
- Anode to Cathode capacitor?
- Tube Compressor
- Tweed Tone Control Simulation
- Low Impedance output for B15n style preamp
- Input question
- preamp triode replication
- Capacitor multiplier circuits
- CF as First Stage
- 'PI' type distortion in a single ended amp - possible?
- comparing tweed front ends 5F4 vs. 5F6A
- What to Rip Off - 6V6 Power Section using Vintage 6V6G
- 5E3 Volume Tone mod
- Is it worth buying huge value power filter caps?
- Gibson BR-1 build
- Grid stoppers with AB2
- Finally getting around to ordering parts.... but I am green as can be...
- Power Scaling in Morgan amps?
- Star grounding problem
- Which cathode voltages to choose?
- LM3886 Spice model
- PT, OT and tubes. How do they interact.
- What makes the power section sound like it sounds?
- Bandmaster 4 Ohm OT into 8 cab?
- Converting SF Bandmaster PI and Bias to Blackface?
- Tube Rectified Amps: Standby via Switch on Rectifier Heater - Good Idea?
- Placing_5Y3GT_of_Champ_5F1_into_STANDBY
- Adequate PT for 2x7591, 2x12AX7
- 6s4 triode in place of el84 in se amp, a good fit?
- How to properly measure OT inductance??
- Need good link to output transformer design.
- Output power
- SE amp for 2 miniature triode/pentodes
- Ampeg BA115
- Current Limiting Resistor Power Rating
- Coupling capacitor voltage rating - Calculating the 'proper' value?
- What is a Parallel Single Ended Amp?
- solid state long tail pair input
- hammond organ verb
- PC occiliscopes
- 5E3 vol & tone mod to 6G3
- Tie both cathodes together and bias with one LED?
- Grid stop resistor.
- OT, the bigger the better? And which one to choose?
- CF vs MF plate resistors.
- ss rectifier circuit design probs..
- HELP, Will this work
- Townshend CP103 Hiwatt tone control- have you tried it?
- Tube amps for beginners
- PTC voltage ratings - fusing B+?
- Peavey 6505+ 112 vs 5150 mk1
- Ultimate screen and bias voltage source: series 9v batteries in parallel with B+?
- preamp design from 3mv to 1v
- Germanium Transistor cross reference
- Tube based octave effect?
- multi tap windings
- Strange input loading effect.. or not?
- Matching output impedances: how do?
- Question in RDH4
- mini reverb circuit design