- Pre-amp Fixed bias / or self bias. Which is better ?
- EL84 Tube Rating
- DIY OT Swap-Am I Safe
- 1967 Deluxe Reverb Problem
- Wattgrinders?
- SRV's Vibroverb dissected surprising mods.
- How often do you change your PI?
- Crackling while warming up
- Trace Elliot Quatra Valva bass amp problem
- 59 5G9 Tweed Tremolux Trouble . HELP !!
- Hoffman point to point mod
- Blown Power Transformer?
- Best approach when going from 2 to 3 prong AC
- Vox AC15htv busted!
- Help w/ 12AX7A ID please
- Star Sirius 30 Manual/Tube Chart
- 5Y3GT in place of a 5AR4?
- bassman middle control install gone wrong
- Fender Hot Rod Deville 212 problem
- Twin reverb not powering on...help!
- Circuit design and tone impact
- Sprague Atoms The Surprise is inside
- Amp failure and "insert" inputs.
- Attenuators, headphone taps and you
- Which preamp tube to replace? And with what?
- Peavey 6505 problem
- Looking at a JCM 900 MK3 but have a question
- How to bias this amp?
- Traynor YBA-3 gut shots
- how do I make my 1974 clone feel more loose ?
- Fender 93' Concert Questions
- Magnets vs. Tubes. A problem?
- OHMS question
- Need Tube shields where do I find em
- Fender 65 twin Reissue
- Add effects loop?
- Epiphone Valve JR Mods
- 5150 iii starting to pop when channel switching
- Fender Twin Reverb 1965 RI with external cab.
- Fender DRRI Hummmmms ...
- Tubes in a quad: Where to put mismatched pairs?
- hows to wires up a 6V recto filament center tap!??
- Don't be too harsh on me, but...
- HELP! - Marshall 100W JCM 2000 DSL - Output Problem on "Classic" Channel A
- Replacing power tubes without biasing
- Changing a 5AR4 to a 5U4 in a Dr. Z?
- Traynor Electrolytic re-cap: more uf's ?
- Krinard Prototype Confusion
- DRRI Hum and Volume Pot Issues
- Trying new preamp tubes. Switch types, or brands?
- Switches popping
- impedance mismatch smoked the amp?
- Twin reverb voltages
- 4 ohm amp/8 ohm speaker???
- Silverface Champ Bias Mod
- I am looking for someone to write an amp schematic.
- Dumb impedence question
- Problem with JCM800, fraps out over 2 on the master
- Power cord directly to rectifier tube?
- Layout/lead dress question
- Weird taps and color coding on old geezer OT?
- Best place to buy SMALL quantites of caps, resitors, etc.
- Three 8 ohm speakers wired to 8 ohms...
- Bandmaster goes Thump in the Night
- Add standby switch?
- 67 super reverb has distorted sound when note decays
- Amp Tech in Detroit Area
- Eminence speaker like a Weber California?
- Running 2 amps with a 5000W Generator
- Blues Jr Hiss
- Proper way to repair a break to a circuit board?
- Speakers vs. rated watts?
- JTM45/Bluesbreaker Output Impedance selector mismatch?
- How do you tell when tubes are overheating?
- Amp Mystery
- Swapping speakers in cab 8 ohms to 4 ohms
- could this be a power tube problem ?
- Suhr Mini-Mix Alternatives
- Low pass filter help
- Slope resistor mod
- Vibro Champ Through 2x12 Cabinet
- Finished octal tweed princeton semi-clone...
- What is a Swart AST?
- DLS mod using switch--wiring help needed please
- Original Speakers in Orange Cabs?
- Electro Harmonix EL34 tubes...Fat Bottle or Regular???
- Tubes for a Traynor YBA-1 Bassmaster
- 5F1 Champ clone, 22kohm 1/2W OK in power supply?
- Channel 1 not working on Pro Reverb
- EL-84 Specs ?
- amp tech in ohio/cincinatti
- 1978 Mesa Boogie
- Transistor substitution guide...where can I find one?
- Silvertone 1484 layout drawing (or hi-res gutshots)?
- Does using shielded grid wires really help much?
- First Time Poster - Looking for Inductor...
- Grid Resistors on 6G6B Bassman
- SF to BF Conversion
- TAD Electrolytics
- Who makes circa 20AWG teflon insulated shielded hookup wire?
- Can someone explain exactly how ohms function?
- Need Schematic for Sears "200 XL"
- Blackface Deluxe Reverb Kit?
- Will new caps change my eq. range or tone?
- popping noise in a 66 pro reverb.
- Electrons can't survive in a crystal lattice.
- Chenging standard recovery diodes to fast recovery
- Quick amp ohm question. Need help!!!!!!!
- My '66 Fender BF Dlx Rev is fizzy with OD pedals...?
- 6v6 to 6L6 in a Gibson GA-16t?
- Low Filament Voltage
- Low Voltage on Pin 4?
- Would this make a good project?
- How hot is too hot for a 5E3 chassis?
- Effects processor problem
- New filter caps; bring voltage up slowly?
- Ampeg VL 503
- Where to install standby switch?
- Ohm question. 16 or 8 ohms to 2x12 cab?
- DC vs. AC heaters
- UL ratings of components
- what is negative feedback
- Ampeg J-20 Mods?
- Fender Champ Build (stack not combo) SOUND PREVIEW
- Amp Volume / Speaker Impedance
- Questions about Fender blackface vs silverface amps
- How to adjust bias on Ampeg VL-1001 amp?
- Help with Boogie Trem-o-verb combo
- Mesa Boogie DC-2 Studio Caliber - MODS
- Epi Valve Junior
- AT-100 blowing fuses no power
- V32 Palomino - volume dropping
- What's a common value for input coupling caps on Marshalls?
- Rectifier tubes
- Zener diodes, or new PT?
- How much noise/hum should an AB763 Super Reverb make?
- Problem with Mesa Roadking II.. ch. 4 prob only
- 1960 Gibson GA-40 Amp Question?
- Silverface Champ-very loud hum, no signal.
- Bassman input Ohms speakers
- where to source a 0.001f coupling cap for SF Twin??
- hot rod deluxe issue
- NOS tubes
- Vari-watt powerscaling or not?
- How do I determine the output impedance?
- Have these caps been replaced?
- acoustic through marshall question??
- Measuring reverb tank impedance?
- Standby question..
- Replacing reverb tank?
- High Mid attenuation...how?
- Noob question - need to ground an amp/pedal.
- PRRI makes dirt pedals raspy... bright cap?
- RIP Jon Bessent 1952-2009
- Fake Tesla 12AX7s???
- Mallory 150s Outer Foil
- Brownface Princeton Bias
- Desperately want to learn to build/fix amps... Where to start?
- Mismatching power tubes pairs?
- What's the largest value orange drop cap? Where to buy?
- Weber Speaker Question
- 2 Speakers in Series/Parallel?
- blowing fuses- OT short?
- Tube amps and generators?
- Potentially stupid Super Reverb question
- Reading pot codes
- Best preamp tubes / cost
- Vibro Champ Trem - Is This Normal ?!?
- out of phase fender channels
- Basic cap types question
- Cabinet Wiring
- silverface deluxe reverb problems
- ef86
- Need advice for my Mesa F-50
- Sag, Power Scaling, VVR confusion - BF'd Bandmaster Reverb - No bedroom volume needed
- Rushing Waters of White Noise Noise Noise
- Help me ID these preamp tubes
- Fender Blackface cab dating question
- JBL wiring...out of phase and why?
- Need a transformer guru. Bias supply affected by load on Mains???
- AC30 blowing mains fuse - rectifier?
- Lil Dawg Champster Problem
- How do I tell what circuit (type) my SFSR is?
- Weird sound out of cab
- Retubing my Fender Reverb tank: What should I expect?
- Soldano Astroverb speaker load?
- How to work on amps?
- Really stupid question
- 2-12 cab series-parallel switch
- Reverb on a Tweed Amp
- 6v6 & EL34 Tubes. Questions
- Reverb eq mod in Super Reverb channel 1
- Damn! My home built 5E3 Just Died!
- Help marshall jtm 60!!!!!!????????
- Tubes and Tone
- Do silver Fender blackface grills turn brown?
- Capacitor in parallel with negative feedback resistor?
- Need back plate for JMP Marshall Super Lead????
- How to bias a Champ/Vibro Champ!
- BF bassman, chronic rattle... Looking for suggestions...
- Identifying Bias Capacitor on Harmony H400A
- On building an amp from a kit - Mojotone
- AC30CC2 help !!!
- Kitty Hawk M5 service information needed
- 5881 tube substitutions
- Rectifier tube substitute?? the 5Y3
- My 5E3 Has a B+ Voltage of 417v!
- Are even-length "legs" on a capacitor mandatory?
- Biasing Amps Questions
- MM vs Heyboer vs Hammond vs...
- Are there any Mods for a Blues Deluxe RI?
- New Amp - No sound
- Can anyone help with info about Fender Champ 25 SE ?
- anyone try the new Sozo fender capacitors?
- Output Transformer Question
- Headstrong Lil' King Reverb
- Two Rock "mid" question...
- Marshall 2554 - no choke?
- Black Fender Caps
- Another US/UK amp question
- Tube failure?
- Fizz on top of note
- Adding a Presence Knob to an AB165 Bassman
- Anyone interested/for hire in giving a house call on proper biasing +tutorial in NYC?
- Speaker / Amp Ohm ratings questions
- Switching between class A/B, class A, and SE Class A?
- Telefunken 12ax7 question...
- Broken Mesa...Best to Sell it? or Morph it?
- two amps are out of phase!!!
- Need transformer recommendations for SE/Class A/single EL34
- Ocsillation & Reverb not Working Properly
- I need a forum member who can make a faceplate!
- Need help - simple wiring diagram
- How do i go about becoming an amp tech?
- Pittbull 45 went down last night...
- Bias Supply: This One's A Head Scratcher
- Fender blues deluxe in trouble
- AMP tech in Orange County, NY area?
- Soldering on a PCB - quick question about technique.
- Is rebiasing necessary after replacing an O.T?
- Will a good power conditioner eliminate problems caused by dimmer switches?
- Germino Classic 45 with 6V6's and 5Y3 Rectifier?
- Caps for Champ style Class A amp; biased? (Alamo)
- Fender DRRI re-build
- installing solid state rectifier = re-bias?
- 2 Power tubes... different very mA readings ?
- Biasing my bf bassman...
- Tube covers in fender amps?
- How to measure the in/out impedances for reverb line?
- how to connect a 240V hammond transformer???