- 12ax7 tube ID
- help with 4th tube problem (Marshall 1959 100W bias)
- Determining an amp's full output wattage
- Transformer ID
- Tung Sol black plate?
- Today is opposite day for my amp...
- Amp techs...I need a schematic. Check this out....
- Tweed Cabs: What kind of pine?
- 12AY7 in V1 of a Marshall 50 ?
- Marshall 4140 Help
- Bacon frying sound in amp at idle...
- Ever re-cone a speaker that wasn't blown?
- Noisy Deluxe Reverb
- Vibro Champ Biasing
- Current EL34's
- What kind of toggle switch?
- ok, so i had my speaker cab disconnected...
- DRRI issue, please help
- Adjusting Grid voltage
- Great tone, bad hum
- Amp "overhaul" and do I need one? ! (Rivera)
- How to reverse bright cap mod to a DRRI???
- Marshall 2204, Amersican/Canadian Transformer Question
- 2 to 3 prong conversion on BF Vibro Champ still need help please
- Repro Princeton Faceplates?
- Recommend a bang-for-your-buck 5E3 kit please?
- Questions about (passive) Leslie speaker
- Impedance for Silvertone 6X10?
- How does cathode biasing affect tone?
- Ceriatone Plexi 50W problems
- NFB cap instead of resistor? Anyone familiar...
- Blew a filter cap need advice or info
- Bogner Question
- '63 Tremolux - is the original transformer multi-tap?
- Is it worth reconing an old Oxford?
- '57 Tweed Twin RI vs. Weber 5E8A kit
- 6G6 Kit? Studio Outboard Gear Kits?
- EL84 tube rattles at certain FREQ
- What circuit revision for '79 pro reverb? And some gut shots
- Solid Core vs Stranded?
- Tube porn
- 4 tubes, then 2 tubes, then 1 tube
- tube amp troubles
- Power Tubes in Old Gibson Skylark
- Red Plate Special
- DRRI light dimming power loss problem!!
- Vibro-King screen resistor
- Speakers for 64 vibroverb
- My weird, vintage, rare amp
- Trouble Finding Some Tubes
- source for Matchless style lamp holders?
- Adding a line "in" ?
- Mullard manufacture videos and more
- Salvaged Univox - now what?
- Amp builders/designers - please critique my circuit
- 5u4 Rectifier in Brownface Princeton?
- Easy to punch chassis?
- Can someone help me ID these tubes
- 5E7 Checkout
- Express schematic
- 8 ohm +16 ohm in a 2x12
- What Makes Amps Out Of Phase?
- Adjust ohmage when pulling power tubes?
- Speaker impedence help.
- Noisey Reverb?
- To all you amp techs out there....
- Tube Amp probelm...must fix by tomorrow!!! (video included)
- Ampeg B-25 Amp Problems
- V32 cathode resistor change
- 100 watt VS. 50 watt by removing tubes
- 12AY7 vs 12AU7
- amp clone buyer's guide
- shielding a pedal
- Bias for Tung Sol 5881
- Custom Chassis Fabricators? Anyone??
- Tube amp design relative to tube manufacturers
- Marshall Help
- what's your opinon on using HexFred diodes in tube amps?
- Amperex Bugle Boy 12AX7 anybody use them?
- Digitech gsp 2101 locked up????
- Amp tech in Cincinnati
- Princeton Reverb Experts?
- Metal Oxide vs Carbon Film for screen grid resistor
- Question about safe practices... (bias voltage)
- New Tung-Sol 12ax7
- OT swapping info
- Use guitar cable from head to cabinet?
- Chassis source: FOUND ONE!
- wire strippers for teflon wire?!?
- Vintage Tung-Sol blackplate 12AX7s out there?
- pt for '66 super reverb bf
- How do you rebias a Bruno Cowtipper 22?
- Power Amp Damage??? Help Please.
- Tube Tester ?
- Help with plexi hum.
- Safe to mix speakers in a series wired cab?
- Amp making a harsh crackle on one channel?!
- differences between 2 identical output transformers,one of them multi tap
- Twin Reverb Power Tubes...dead tube?
- half power load switch
- GE 6201 for Reverb Driver in Fender BF amps?
- Please help me build a parts list for 5E5A Pro
- Replacement reverb tanks for BF amps?
- Of Eyelet Boards and Solder Blobs
- Allen Old Flame bias question/biasing in general
- 5150 III schematic
- woodworking question
- Vibrato not working in Showman Reverb TFL5000D
- Are long speaker cables viable?
- what should i do. save up for another guitar or get a Marshall AD50?
- 1 watt Carbon Film or 1/2 watt Carbon Comp?
- Anemic Super Champ
- Dead tube socket
- 1980 Hiwatt: Variac Recommended?
- Marshall JCM 800 4010 capacitor question
- '67 Bassman problem......ideas???
- New 12AY7s - Groove Tubes vs EH
- Vox AC30 won't turn on...
- Learning speaker reconing?
- question about Derek Trucks' amp????
- Can you modify reverb to decrease/quicken decay???
- Will JJ 6V6s take more abuse than some NOS?
- Installing a midrange control on a Fender
- Help (SF) Vibro Champ popping fuses
- Help me identify this speaker
- help understanding split load PI's
- Tube Biasing and Tube Specs
- SF Princeton Reverb: Weird noise w/ delay pedals...
- Marshall plate voltage low??
- Need help dating a blackface Bandmaster head
- ID This OT
- RCA to 1/4" speaker jack?
- semi on-topic (but not really:) Help repairing an old hi fi speaker of strange design
- Bias????
- BF Deluxe Reverb High pitch noise
- amp not producing sound
- Cabinet String: Glued in?
- How do you know when your amp tubes are spanked?
- Sig-x tube problem
- Redplating in Marshall 2061CX??
- Grounding a '65 Vox Pacemaker
- Screws: Bulk suppliers?
- deluxe reverb clone normal channel not working
- Sourcing a ~'77 Marshall 100w output transformer?
- How does a phase inverter affect tone?
- Converting plexi clone to Cathode Bias?
- Fender 66' black face twin turning on after years of non use???
- When in half power mode, do the ohms double?
- seeking Fender reverb unit (6G15) knowledge
- About my newly acquired Marshall 1960AX cab....
- amp problem... help please
- Tube help! Please!
- What kind of tubes?
- Series/Parallel vs. Parallel/Series speaker wiring
- PTP Tremwreck
- 6L6 recommendations...
- Effect of speaker specs on tone?
- Using different power tubes in an amp
- bad hum/noise from my amp that shouldn't be there(need help)
- Not sure what's going on with my JCM800
- Silvertone 1389 transformerless amp: looking for schematic
- Marshall 1960 cab 32ohms, how?
- Another Blown Fuse Request
- JAN-CKR-6L6 Metal Casing Tube; Is it a suitable tube for Carr Mercury?
- So I opened her up...(Mesa .50 Cal + problem)(pictures included)
- How do I check plate voltages on my preamp tubes?
- Amperex Tubes Question
- Humming Phase Inverter
- Marshall Style switching Jacks?
- Doing a Cap job.....Vintage Fender.....
- Advice requested: Marshall + Step Up Transformer
- Power scaling in a Fender blackface style amp -- Any experience?
- Portaflex PT replacement options?
- Diagnosis needed
- Mesa MkIV Troubleshooting Assistance...
- Do all tubes have secret codes?
- In an effort to understand.....
- Tube Testing question
- HELP! Badger down.
- Power Transformer upgrade in 5E3?
- 68 Bandmaster
- "Proper" Speaker Ohmage Choice ?
- cone cry
- soldering question
- Output tranny swap to multi tap?
- Output Transformer wiring Question?
- Speaker Wattage/Efficiency Question
- Fender Vibro-king cathode follower stage?
- Scored a 6G6-B, Lots of Tech Questions
- Question about Cross-Line PPIMV
- Warmer 12AX7
- max dissipation for EH 6V6 ??
- Fender Red Knob loosing volume
- Tubes or sick amp?
- Sovtek Mig 50 help!
- Bogner Shiva Help - Static/buzzing on low E, A, and D
- SF Pro Reverb Volume Issue?
- Good NOS 12AX7 for PI?
- What is the name for these tube problems?
- Current Lot of KT88's
- Groove Tubes Bias help
- 12ax7s in vibroverb custom???
- Question - Amp Problem SCXD
- amp tone question
- LTP as a Mixer
- What is the best filter cap for re-capping a vintage Hiwatt?
- opinions on Tino Zottola's books?
- I might just be stupid...Hum question
- My cab's 16 ohm jack reads 22 ohms??
- JCM 2000 DSL100 no sound! please help!
- NOS JAN Philips 6L6WGB in 1966 Twin Reverb YES or NO
- Shield the BOTTOM of the Reverb Pan? -SFDR
- Preamp tube clipping. Top vs bottom of wave.
- 18 watt TMB Problem
- shielding for the amp cab?
- What do these resistors do?
- Classic 50 static issue
- 8 ohms into one 16 ohm cab
- Static type noise with no input
- EL34 Mesh Plates?
- Vibro-Champ Help
- tube started to redplate, what's the likely problem?
- Best Re-Cap Job you ever seen...or NOT seen
- Repairing the footswitch relay on a Boogie
- Pre-amp Tube Question (Valveking)
- KT66 in 69' 50watt Plexi
- KT88 vs 6L6?
- Y cable to connect cabinets
- So I decided to go with an AC15H1TV combo.
- Differences between 12AU7 vs 12AX7?
- 18 watt Tone Control Problems
- How much danger am I in?
- Why do the chassis in many amp heads hang upside-down?
- Reverb not working......what to check next?
- Power tubes for MM 210-65
- Ugly distortion only at higher gain levels - reverb transformer?
- Substituting EL34s with 6V6s?
- jcm800 clone, power tube issue.
- Matched quad tolerances?
- which tools are most helpful in amp building?
- How do you know when caps in your amp are going bad?
- 5881 vs 6L6.....the difference is?
- Cathode Bias Benefits?
- Bias Fender Amplfier Myself Easy Yes? No? Help the Dummy?
- who has a Weber Z-matcher?
- Just finished Metro 50 watt plexi build!!
- I think I destroyed a speaker
- Speaker Reconing in OC/LA reccomendations
- What's the word on Chinese 6V6's?
- Filament Inrush