View Full Version : Amp Technical Info
- 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?
- Soldering pencil dead
- 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
- Acoustic Model 123 - extension cab ohms
- Blues Deluxe semi short out????
- Vibro Champ Through 2x12 Cabinet
- Finished octal tweed princeton semi-clone...
- What is a Swart AST?
- DLS mod using switch--wiring help needed please
- KT66 in my LPTT ... ?
- 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 ?
- Multimeter and cable questions for Classic 30
- amp tech in ohio/cincinatti
- 1978 Mesa Boogie
- Transistor substitution guide...where can I find one?
- can I get a trasnformer re-wound?
- 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
- Vintage Modern
- Daisy-chain question
- 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?
- HK Switchblade 100h feeds back instantly
- 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?
- VHT Sig-X Hum
- Ohm question. 16 or 8 ohms to 2x12 cab?
- DC vs. AC heaters
- UL ratings of components
- HT-5 Footswitch Help
- what is negative feedback
- Ampeg J-20 Mods?
- Fender Champ Build (stack not combo) SOUND PREVIEW
- HK Switchblade 100h schematic?
- Amp Volume / Speaker Impedance
- Electro Harmonix 6L6
- 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
- D*mble SSS schematic and info?
- 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?
- Plugging a Head Into a Combo Cab/Speaker
- Silverface Champ-very loud hum, no signal.
- Bassman input Ohms speakers
- where do i put the "permanent cap" on the normal vol of my AC30cc ?
- where to source a 0.001f coupling cap for SF Twin??
- hot rod deluxe issue
- Atomic Space Tone owners
- 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
- heatsink for a Mesa
- 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
- Fender Tone Master Biasing
- JBL wiring...out of phase and why?
- build preamp from schematic?
- 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?
- Amp Conversion (Is this possible?)
- Soldano Astroverb speaker load?
- How to work on amps?
- JTM45 RI problems
- 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!
- 5y3 Rectifier in AC-30
- '05 TopHat Club Royale: Bright Cap Mod
- BF bassman, chronic rattle... Looking for suggestions...
- Identifying Bias Capacitor on Harmony H400A
- On building an amp from a kit - Mojotone
- New question jtm 60.................................
- How to tell if a pot shell is grounded...
- 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
- 5150 iii excessive hum and switching issues
- 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?
- Mercury "Axiom" output transformers - anyone try one with a Blackface Fender?
- Help/mods to Mesa DC-2 please?
- 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!
- Loud hum from brand new Ampeg J-20
- Need help - simple wiring diagram
- 57 Champ-Amp questions
- How do i go about becoming an amp tech?
- Pittbull 45 went down last night...
- Randall cab question
- 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?
- My new Fender Champion 600 has an Electro Harmonix power tube - any good?
- Will a good power conditioner eliminate problems caused by dimmer switches?
- '64 Fender Tremolux 10uf@150WV cap?
- 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...
- Bulb Limiter and ground
- Tube covers in fender amps?
- How to measure the in/out impedances for reverb line?
- how to connect a 240V hammond transformer???
- Dumb question... Whats the danger in installing tubes and not rebiasing?
- I need Schoolin', re FilterCap Discharge & MM
- Software Signal Generator & Oscilloscope; any good?
- who knows the Mesa OT color code?
- 62 gibson GA19 falcon rvt.How to measure if the tranny is ok with my rectifier?
- Phillips EF86 real or Fugazi?
- RFT EF86 or is it
- Hissing sound from a Fender Twin
- Vibro-Champ problem
- Tube Dampers--- Why?
- Comments on Fender amps, "Pete Anderson"
- How tough is it to build a new efx loop for an amp?
- Can I Use a Different 12A?7 For a P.I.?
- popping sound on my high powered twin, true bypass pedals only
- 100 OT 50 watt PT
- What is a going rate for Kalamazoo Model1 cap job?
- switching a leslie on and off using ac current
- 1969 Fender Silverface Blackline Bandmaster-What Circuit?
- Need help finding some parts for a Concert II 80s
- help with a DRRI Reverb
- princeton reverb woes
- Power tube life
- '72 or '73 Bandmaster Reverb
- VOX Valvetronix Amp Effects Knobs -- Need Source or Part #
- wet/splatty distortion overtone from my new Bruno...
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