- 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
- 6k11 tube talk
- A question on filtering caps
- speaker sensitivity question
- Simple Electrolytic question(s)
- New book: Designing Tube Preamps for Guitar and Bass
- Adding one more tube - PT enough?
- Line and power filter question
- I have sort of an odd question here .
- I have read about diodes used to protect the rect tube
- OTL Reverb driver
- Master volume on a SE amp?
- How to make my new Plexi clone louder
- Is a cap needed between MV - SE with bias?
- 6SJ7 as phase splitter
- Ghost Notes From Marshall, Bassman, Etc.
- NFB and PI overdrive
- Standby switching and amp football
- How to determine output phase or does it really matter?
- Determining power output
- On bias /adjustable fixed
- new cabinet concept.
- What's the best reverb tube/circuit?
- Amp for both Guitar and Voice
- Selecting a Choke
- AA764 champ last question
- LTP vs See Saw
- 5E3 Prebuild Questions - Decoupling, Filtering, etc
- Need some help with 2 problems
- On 6V6GT tubes?
- Output Transformer load lead identification?
- A little voodoo?
- On a 5E3 why do they use a 1.uf coupling cap
- confused by schem, help!
- Mercury Magnetics in August VG magazine
- Best rotary switch for an attenuator?
- AA763 champ bypass cap question
- Fluxtone speakers
- Biasing Mixed Power Amp operation
- attenuator inductor emf trouble
- Sorry about the n00b question!!
- Shielding question.
- Power Tube Grid Drive Voltage
- AA763 Champ home brew B+ ?
- Bias modulating trem idea
- Design enviornment
- Bassman 70 center tap
- Turn amp in preamp
- Convert Super Twin To Headphone Amp?
- Power Transformers and Voltage
- SS rectifier & hum magic
- when checking bias with a meter in series...
- Rectifier fuse?
- Elevating Heaters from B+ with bleeder resistors
- Do bleeder resistors waste power?
- Another bias question
- Unused triode
- Transformer current coupling
- Mark IV EQ on positive voltage?
- What's going on in in an Ampeg V4 preamp?
- Three cheers for tboy
- question about bas resistors on EL34
- Brown fender tone stack with tapped pot- experimental results
- Resistor Value for P/P Cathode Bias 6L6/KT66
- Two power Transformers
- Determining Power Transformer Current Requirement
- Input filter cap value 5V4
- Tube or solid state?
- How would you describe plate impedance?
- Purpose of diodes, cap and res between chassis and power ground?
- Does anyone know the reason for Mesa Boogie 20/20's 10 330 OHM resistors in series?
- LED instead of Lamp wiring
- shielded wire for inputs
- how do I use a 50v bias tap for a 48vDC mic phantom power?
- 1940's Thordarson transformers
- Multitap universal primaries on power transformers?
- high gain amp design and questions
- blocking dist
- EL34/EL84 versus 6V6/6L6
- Any suggestions for things to do with this amp?
- Magic Eye
- Help with oddball 3XEL34 output section?
- Motorboating returned, and this time it's a problem
- Tube FX loop design questions
- would this work?
- capacitor tester
- Post PI splitting of signal
- LED b/t relay ground and ground
- Voltages and volume
- Question about prevalent 6L6GC Screen Grid Voltages
- wire gauge confusion
- ot primary impedance question
- self split 12au7 (FF) into 10k OT?
- Tone circuit - schematic attached
- What to build with 580VDC B+?
- Loose low end
- Mains Breaker Instead of Fuse?
- UL taps for guitar amps!
- Unity Gain for 12AX7 Stage
- Another PSU question
- Buzzing sound that goes away when touching the strings?
- belton tube sockets
- Useful parts in a junk TV?
- So, uh, Steve.....(conner)
- Determine transformer specs
- Need help wiring DI output in tube preamp
- head room calculation?
- Couple PSU questions
- Edcor OT spec ideas needed
- Route 66 tone stack (and other Dr. Z amps)
- Champ OT Question - TUT3
- Space Charge Type Tube?
- DR504 what's up w/ V3?
- how to get bypass cap tone w/o gain?
- NFB Lowers Output Impedance?
- sub bass elimination
- Power Supply - Schematic attached
- has anyone built a 12v or 30v tube amp?
- the f**king f**ker. Anyone seen inside it?
- Which PSU caps?
- newbie capacitor question.
- A couple of 6G15 Reverb "whys"
- Attenuator build problems
- Chassis Layout
- Updated my schematic finally !
- critique please
- negative feedback vs. attenuation
- On conjunctive filters
- One-Knob Tone Stack Idea
- Another general resource
- Any way to replicate this tone?
- Designing a 2XEL84 PP amp with a smallish PT (190-0-190 65mA)
- Anyone bother to redraw a Marshall DSL 2000 schematic?
- Any reason this wont work?
- Power supply connundrum.
- 6550 or kt88 screen voltage
- visio templates?
- Selecting OT Primary Impedence from Load Lines
- meter probe slipped on plate, poof !
- Choke Voltage Rating
- high or low grid leakage?
- Filter cap bleeding resistors: pros and cons
- Mixed tube output KT66 and EL84
- How to protect the OT?
- PI input voltage?
- Weber alnico 8S speaker data - SPL, etc.
- Stand Alone Reverb
- New to Forum - Blackheart BH5H - > Vox AC4 Conversion? Ideas/Schem inside
- neutralization
- I knew this amp was good !
- tone stack section
- Need help refining schematic (Marshall 2204 clone with a "Plexi/800" switch)
- Why would.....
- cheap output transformers??
- Amp Switching?
- feedback howl on hi gain amp
- Ampeg V-2 / V-4 / SVT theoretical question
- dropping resistors
- Cryogenically treated vacuum tubes...?
- Light bulb noise reduction on Hot Plate?
- Pro 6G5-A Vibrato circuit Q
- bf pr w/ 40,20,20,20uf cap can
- power resstors and heat
- single el84 driving two reverb tanks
- Mains fuse location
- voltage tripler/relay/voltage regulator help...
- Question from a transformer-disabled person....
- Blackface preamp, Brown tremolo/vibrato
- When does PT fry from ^plate current ?
- Tube Amp Design Confusion
- 6G3 preamp idea
- hartke 3500 mod
- Shock mounting tubes
- Metallized Polyester Film Capacitors
- Chassis layout questions
- Does cap voltage affect tone?
- Average Resistance question
- Negative DC on hum balance pot
- LED as bias resistor for LTP
- Why Twin Wattages Different?
- series / parallel transformer switch wiring
- Safe Plate Voltage For Unbiased 6L6GC?
- PT Thoughts and Assistance
- resistor in place of choke
- Can I build an AB763 w/ channels in phase?
- warmer triod bias?
- Out go the cathode's resistor and cåp - In goes the BATTERY
- is 30 watts enough for a sag resistor?
- Tone Stack Challenge
- 1000v p-p class AB
- Tone stack idea-will it work?
- Hybrid Guitar Power Amp 45W
- Peavey Special output transformer ?
- 135W Ultralinear Twin Reverb: Questions about wiring in Ext Cab and NFB section
- Super Twin: Ultralinear Conversion
- Merits of 'dual platform' (2x-6v6 + 2x-el84) amps?
- cap size
- Tube-buffer
- Can anyone explain why this is?
- El34's and 800V on the plates
- hi and low inputs. what for?
- On Using Higher Capacitance Power Supply Caps
- Super Twin Reverb 180w Amp: Theory of Operation?
- Whither my transformers?
- Matchless Style Tremolo with Fixed Bias?
- Mixing 5F6A/Plexi channel with Blackface channel
- heaters ac or dc
- Bridge rectifier & arcing 5u4
- '65 Deluxe Reverb OT impedance connundrum
- Bias vibrato questions
- Voltage Regulator Noise
- Tantalum filter caps?
- Toroidal inductors as crossover parts
- Acoustic Amps and their Pots
- One last decision: what type of board construction to go with?
- O.T. secondary confusion
- and speaking of Vibro-Champs
- Chassis Material
- Buffered cathodyne vs. LTP
- Amp for vocals
- Heater center tap
- Fender Roc Pro 1000
- Output transformer assistance
- Can Cathode Biased ever sound like Fixed?
- Transformers
- your thoughts on NFB cap
- Your thoughts on biasing like this
- PSU cap question