- 69 Bandmaster reverb-rebuild
- Do variacs help in voltage regulation too?
- Plate resistors in Marshall circuit creating noise?
- built a guitar amp. need some troubleshooting advice
- Selecting correct wattage speakers!
- Power cord question
- Update - Cryo Tubes
- AC-powered Flanger - electrocution danger?
- Preamp tubes - when to buy "balanced" and/or "matched"?
- Tubes identification
- help with a hot rod deluxe
- DRRI questions
- Found a amp project today comments welcome.
- Resistance across speakers.
- New Weber Speaker in My Velocette
- Standard Tone Stack Cap Value Question
- What's magical about the 4-16 ohms window?
- Recitifer tube?
- Looks like Atoms may be here to stay after all?
- rebiasing question
- Tube going bad? Bad Cat Cub... Which one? Refresh my memory...
- Amp Dropped Reverb Doesn't Work Help
- Clean up oozing capacitors
- Why does my amp sound different sometimes?
- wiring in parallel - odd question
- Rectifier tube trouble
- For EI tube fans
- Modding my Fender Bassman head...
- Can you diagnose this amp problem??
- Need help finding a schematic for a phono amp for a conversion for a friend
- Fender Amp tech question, Please help if you can...
- Speaker rating systems
- who is this guy?
- Recommended JTM45 mods
- Help Biasing a Class A Amp
- Is there any hope for this chassis as a guitar amp project?
- Positioning of V1
- tweed differences?
- NEW book about preamps!
- discharging caps
- How DO you bias an amp correctly?
- fix for "dirty" power?
- YBA-1 ground switch
- Red Plateing question
- A little Class D remedial help?
- Green face altecs
- JJ 6V6S putting out >15w in my Victoria 518
- tube amp noise question
- 12AY7 in a DRRI?
- Noobie wants to fix his own amp... help!
- Bringing back a messed-with small single-ended amp... help!
- Peavey XXX Retubing
- How do I get reverb into channel 1 of fender deluxe reverb reissue
- How do I make the 2 channels of a deluxe reverb reissue in phase with each other?
- '?? differences in biasing GEC KT77 compared to EL34 in JMP marshall'
- Changing out a resistor on a 5E3- Dangerous?
- blown fuse problem with a Marhsall Super Lead
- Question: Amp Damage from Bad Tube
- Suggestions for a Digital Multimeter
- Does this sound like a blown filter cap?
- Two questions about THD Hot Plate
- The 'Presence' control?
- Bias pot in Ampeg V-4B
- Amp makes "single coil" type hum
- Reeves Custom 50 head (EL34's)
- 6v6 tubes questions
- Too much bass/woofiness in Marshall Plexi circuit...
- Adding ground prong to an old Champ?
- 12AX7 and 12AY7
- Turning A Combo Into A Cab
- tubes for a Naylor SC-38
- Worthwhile SR mods?
- Noisey Microphonic Reverb
- Could this be a bad speaker?
- Changing the PI in cathode bias amp
- Chinese KT66 Rattle
- Who wants to fix my Valve Jr.
- Electro Harmonix or JJ tubes??!
- 'brighter' 12ax7
- Too low or too high voltage? I need help!
- Cap voltage values . . .
- Hot rod Deluxe input jacks
- Bias Question
- Gibson Skylark 5T Help the Dummy
- Speaker ohms question
- Tung-Sol Issues
- 12b4a Is used like high gain 12ax7?? or i'm being fooled?
- Bassman RI internal fuse value?
- deluxe reverb 2 problem
- London Power Press?
- New VA KT66 Dead in 20 hours...Replace w/ same/other?
- Class A + Orange
- this is a lil weird.
- Tweaky tone knobs?
- OK I tried that Zenith amp as is to see what it sounded like.
- hmm... an interesting terminology/nomenclature question...
- jtm 45 vs tweed bassman
- Amp Help
- modifying a Bassman
- Another beam blocker question.
- Reverb driver question
- Fender amp squeals when tilted back
- Help me service my Champ!
- Carvin SX100 amp speaker hiss
- Sozo Cap test
- EF86 front end on a Marshall!
- Speaker Phase?
- Fender Twin Reverb Noise Problem
- Dr. Z Rt. 66/KT45 questions
- EL84 amps and biasing
- 12AY7 question
- wiring a 4 10" for 16 ohms..?
- Vox AC15 CC, what tubes to buy for the best sound?
- Transformer Specs
- 12EU7 Preamp Tubes?
- ID a 12AX7 please
- not really technical amp info but...
- Loose tube base
- The importance of biasing.
- Anyone know if a a good online source for detailed Tube pictures?
- Brand new 1M pot bad?
- Question on a Champ 12...
- Amp impedance switching
- Silverface Vibrolux bypass caps
- Anybody have a Ceriatone DIY amp?
- Vox AC30 question - Subtones
- Bias question - voltage & current difference between tubes
- drri reverb & volume questions...
- Amp makes cracking losing power noises only at higher volume, what to do?
- Denver/ Colorado Amp Techs
- Princeton/Weber Speaker Problem
- Can speakers "go bad"?
- STF Electronics question
- What does "HI-MU" mean when describing a tube?
- Volume swell. What would cause this?
- Help! VAC 22 6V6 Bias
- What model Jensen speaker is this?
- New Project? SF Dual Showman Reverb Questions...
- Fender Concert II question
- Effect of cap type in BF vibrato circuit
- Restoring a Tweed Deluxe
- Fender Princetons
- Speaker sensitivity question...
- tube warm up time?
- Speaker Cab Insulation, Yes or No?
- Adding a "Speaker OUT" for Roland JC-55?
- Tube question
- international servicemaster 6l6gc
- Tung-sol 5881's in a Super Champ?
- Is This Fixable? (Twin Reverb Cab)
- Combo cabinet tolexing services???
- Suggest OP XFM fro Marshal TSL 100W
- Disconnecting a Fender Trem Circuit...
- Why Fenders are pedal un-friendly?
- Cap Goo
- Is this thing safe for my amp, anybody use one
- reverb on both channels
- Help with 50wOT for MS1987
- tube or other issue?
- Blasphemy ?
- Who will fix it?
- Instructions on biasing a Marshall head?
- Tung-Sol 6550 tubes anybody tried them
- Traynor production amp assembly video
- Any benefits of Series over Parallel or visa versa?
- SUPER CHAMP Gain Channel Mods?
- JCM800 2203 Bias Pots
- Amp Hum
- What can be done to (make better) a Blues Deluxe Re Issue
- De-rating amps
- Plate Voltage Question for Reverend Owners?
- Need Some Electronic Guru Help
- Fender Intensity Control Switch/pot... (wiring question)
- Power Tube glow question 50 watt Marshall
- Tung Sol KT 66?
- Ported 2x12 cab idea....
- Pulling tubes and using a Hot Plate
- Can reverb be added to a Showman?
- Mercury Magnetics?
- Bias Pot
- What output transformer for '68 Fender Vibrolux Reverb?
- Badger/Suhr/Power Scaling questions
- Dr.Z Maz38 - volume issues
- Switching a Sunn Model T to EL34s
- Help with blown fuse?
- Just got a peavey ultra 60, and was playing :( now it won't
- Retentioning octal tube sockets
- Fender power transformers; any effect on tone?
- Amp tech question...Fender Vibrolux
- Another Impedance Mismatch Question
- Lay rest to some amp myths
- Increasing Fender Bright Switch Cap. Uf Pf Nf ?!? Help
- preamp tubes problem solved??
- Where to get turret board?
- Marshall JTM-60 troubles..
- Weber Z Matcher?
- Fender Pro Junior Mods
- SFVR pull boost removal
- oscilliscope. any good cheap used models to go with
- Which 6L6 tube for '66 Pro Reverb, least amount of breakup?
- What gives still getting shocks?
- Budda sd18 troubles???
- Loose Tubes Cure ???
- Just got my Traynor, BUT
- Plate load resistor mod for AC30CC
- Looking for an Amp Tech in Los Angeles Area
- Fuse question
- Help! My new (old) Magnatone got boinked by UPS!
- Shielded wire from input jack; ground one end???
- FRED vs. THD Reactive Rectifier
- Hiwatt transformers - today's equivalent
- 5E5 Bassman cab vs. 5F6 Bassman
- 6L6GC identification?
- Speaker cab construction idea
- ohmage help!
- 5AR4/GZ34 = 5V4GA (Philips ECG/JAN)
- 68 Bandmaster Reverb cathode biased?
- '68 Traynor Custom reverb; remove ice pick highs via slope resistor?
- Help in re-capping my Gibson Falcon please?
- Current Production 6V6s?
- Identifying old versus reissue Mullard EL34 tubes?
- Question on KT66s
- Biasing 5881's
- Tube / valve Identification Codes
- What is the VibroKing a combination of?
- Zenith amp conversion update.
- Using a 1/2A fuse in place of a 1/4A...
- Question for you pro designers
- New Tubes For Fender Twin
- Eminence question
- Can someone ID this OT?
- Cabinet Help
- EVM Recone
- Mesa MK IV Question *Tube Related*
- where to get transformers?
- Bias Meters...
- New production tubes vs NOS
- Thoughts on Hammond OTs needed
- freezing tubes?
- What happens if I leave the 2 prong cord on a '70 Princeton Reverb?
- 22uf/500v cap on plate resistors?
- I think I killed my amp, HELP!!!
- Need tech in So. Fla..
- BF Bassman for mostly Bass. Tubes??
- Amp Cuts Out Until Well Warmed Up
- SF Bassman Retubing
- Musicman RP-100 EL-34 amp worth fixing?
- Tweaking the Tiny Terror - check my work?
- Want to run 4x10 cab as either mono or stereo
- More tube questions - troubleshooting - 6L6 GC