View Full Version : Amp Technical Info
- hum - fixed it mostly, but minor idiosyncratic problem remains
- 2x12 cab wired at 4, 8 or 16 ohms...any difference tonewise?
- Adding "Loop Return" to Amp
- Bandmaster 5e7 excessive hum
- how to bias a hotrod deluxe
- Tools to Troubleshoot an Old Tube Amp???
- Putting a PC Fan in Amp: Help Needed
- Need help diagnosing a Marshall guys...John Philips?
- Acitive effects loop VS. passive
- Alright... I'm stumped.
- Oil & paper caps?
- What's a Marshall Silver Jubilee supposed to look like inside?
- AC30cc1 problems...almost no volume from either channel..
- SS Rectifier Question...
- vintage jensen question
- A (Probably Simplistic) Amp Question
- Mission amps 5E3 deluxe weirdness!
- 72 SF Deluxe Reverb keeps blowing fuse
- SFDR: Do 6L6's NEED a SS recto...
- what to build 6l6
- Weak Reverb in Vibrolux
- JCM 900 Question
- need help with BIASin' a la Ken Fischer...
- Head cab, inside clearance for tubes
- Baffle Board: Floating vs Fixed
- Would a SFDR w/6L6's, weber cap, and cathode biasn'...
- winding specs for a power transformer for an egnater tol 100 head?
- What makes a solid state amp sound good?
- I need a part for my cab...
- how much will a "cap job" affect tone?
- ZZZZZZZZ Sound at Power up
- EL84's for Crate V3112...
- Balanced Triodes?
- Hiwatt DR504 adjustable bias?
- Okay, here's a REAL super dumb-ass question...
- Do these capacitors look OK to you?
- Carvin Legacy footswitch help please
- Help with part id
- Marshall DSL-100 blowing mains fuse
- does a SFDR have too much voltage to cathode bias?
- Kalamazoo type trem not oscillating
- Amp tech in Calgary, Alberta?
- Ampeg 7027A Power Tubes Replacement Blues
- Hot Rod Deville Probs.
- Installing Outputs
- Peavey transtube circuit
- Princeton Reverb Speaker Impedance Mismatch
- kt66, kt77, kt88 - what's the difference?
- Audio Taper pots for Blues Deluxe Reissue?
- Need help with mid 60's Gibson amp
- Speaker cone creasing...
- DRRI Problem - Power On, No Output
- Sovtek Mig 100 Bias settings??
- JCM 800 and the Sovtek 12AX7-LPS
- 68 Vibrolux Reverb Recap Caused Reverb Motorboating
- Tonal impact of wiring mistake
- Would this old Gibson scare you away?
- Speaker Stuck to Baffle Board
- Output Bias Trem + PPIMV = Problem
- One bad speaker, should both be replaced?
- silvertone 1471/airline 62-9012 amp mods
- Deluxe Reverb RI OT and PT help
- Jointed boards on solid pine cabs?
- Strange noises from Dual Rectifier...
- 67 BF Vibro Champ orig Fender Upgrades ?
- 5150 Incredibly Noisy???
- Blues Deluxe Gain Mod?
- Ampeg VT-40 Help ?
- Jensen vs. Weber Specs
- Anyone have AxeFx clips w/o effects?
- 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...
- Grounding a BF Vibro Champ
- 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
- 5F1 with a tone pot added?
- Bacon frying sound in amp at idle...
- Old Vox- Wiring Question-
- Trem saga. -How to adjust intensity?
- Tube order for Fender '64 Vibroverb Custom
- Ever re-cone a speaker that wasn't blown?
- Noisy Deluxe Reverb
- Vibro Champ Biasing
- Current EL34's
- New Rectifier (GZ34) Do I need to Rebias?
- What kind of toggle switch?
- Vox AC 30/6 TB re-issue noise problem
- What kind of tranny for a simple, active line mixer?
- 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
- Different Ohm Loads on a Shiva
- 68 K or 6.8 K input jack resistors on blackface Deluxe Reverb ?
- Has anyone modded
- Help -- Buzz (even when amp is off)?
- 2 to 3 prong conversion on BF Vibro Champ still need help please
- fender vibrosonic reverb - revalving
- Repro Princeton Faceplates?
- Recommend a bang-for-your-buck 5E3 kit please?
- Questions about (passive) Leslie speaker
- Impedance for Silvertone 6X10?
- Faceplate Restoration
- Orbit Electronix Info
- How does cathode biasing affect tone?
- Ceriatone Plexi 50W problems
- Rattling tube covers on Crate Vintage Club
- Louisiana amp tech
- preamp tube info needed
- anyone changed the Transformer on a 64 Vibroverb Custom?
- NFB cap instead of resistor? Anyone familiar...
- Blew a filter cap need advice or info
- Bogner Question
- Vibro Champ Mods???
- '63 Tremolux - is the original transformer multi-tap?
- John Phillips???
- Is it worth reconing an old Oxford?
- 5150 effects loop question?
- series/parallel cab into series OR parallel ext. jack?
- '57 Tweed Twin RI vs. Weber 5E8A kit
- 4x12 into 2 2x12 cabs
- Build quality on new vs. old Peaveys?
- Power Amp phase splitter tube question
- 6G6 Kit? Studio Outboard Gear Kits?
- Transformers v. Rectifier Tube
- Tolex for Amp project
- amp tech's in ct?
- speaker magnet recycling?
- EL84 tube rattles at certain FREQ
- What's your favorite new production 5AR4/GZ34?
- What circuit revision for '79 pro reverb? And some gut shots
- NOS tube issues in Dr. Z z28
- Solid Core vs Stranded?
- Tube porn
- HUM in a newer Marshall JCM 2000 (or is it DSL)
- 4 tubes, then 2 tubes, then 1 tube
- tube amp troubles
- Power Tubes in Old Gibson Skylark
- Red Plate Special
- 1972 Fender bassman ten amp
- DRRI light dimming power loss problem!!
- Vibro-King screen resistor
- Super champ reverb noise?
- Randall RG100ES diode (CFH) mod?
- Sovteks Failing...Again?
- Speakers for 64 vibroverb
- Please recommend a noise filter that works!
- Impedience matching for blackface bandmaster
- Supplier for tolex, grill cloth, and piping?
- My weird, vintage, rare amp
- Can you diagnose this problem?
- Trouble Finding Some Tubes
- source for Matchless style lamp holders?
- Need insight: "Fancy" cabinet design
- Mullard (matsushida {sp?}) 12AX7
- 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?
- fx loop in a 5g9 tremolux clone
- 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.
- Fender Blues Deluxe Cutting Out?
- Noisey Reverb?
- To all you amp techs out there....
- Tube Amp probelm...must fix by tomorrow!!! (video included)
- Ampeg B-25 Amp Problems
- you gotta see this...
- V32 cathode resistor change
- 100 watt VS. 50 watt by removing tubes
- 70s Pro Reverb: noisy click on of vibrato
- 12AY7 vs 12AU7
- amp clone buyer's guide
- shielding a pedal
- Bias for Tung Sol 5881
- Custom Chassis Fabricators? Anyone??
- Question about resistor tolerance ratings
- Tube amp design relative to tube manufacturers
- 5U4 versus GZ34 (5AR4)?
- no sound at all in marshall jmp
- Marshall Help
- what's your opinon on using HexFred diodes in tube amps?
- Amperex Bugle Boy 12AX7 anybody use them?
- PR + Emi Red fang?
- Digitech gsp 2101 locked up????
- Amp tech in Cincinnati
- Princeton Reverb Experts?
- Metal Oxide vs Carbon Film for screen grid resistor
- slave out?
- Question about safe practices... (bias voltage)
- Cabinet Impedance?
- New Tung-Sol 12ax7
- OT swapping info
- Laney AOR 50watt model 1045
- Use guitar cable from head to cabinet?
- anyone near Milwaukee??? I need someone to fix my amp.
- Chassis source: FOUND ONE!
- wire strippers for teflon wire?!?
- Champ with 8ohm Tone Tubby
- Vintage Tung-Sol blackplate 12AX7s out there?
- pt for '66 super reverb bf
- "British Champ" w/ Power Scaling, Which Builders?
- How do you rebias a Bruno Cowtipper 22?
- Polytone Broke!
- channel selection of a 6505+ via midi?
- Amp/Channel Switching
- Whine - Bluesbreaker - and Pedal Question
- Power Amp Damage??? Help Please.
- Powering Orange Cabs w/ Fender Hot Rod ???
- Tube Tester ?
- Help with plexi hum.
- Safe to mix speakers in a series wired cab?
- About mixing a 1x12 and 4x12 - does ea. cab get ½ amps power?
- Venus 3 manual/schematics
- 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
- Bogen CHB 35A tricks?
- Allen Old Flame bias question/biasing in general
- 5150 III schematic
- Connecting a 6v6 output tube in triode mode?
- woodworking question
- Voltage conversion - how much trouble?
- Vibrato not working in Showman Reverb TFL5000D
- Are long speaker cables viable?
- AXESS FX1 Power Supply Question
- Rocktron Vendetta Output Tube Q
- BF Amp Filter Design Differences
- What transformers in a '72 Marshall?
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