- Cheap 6n6p double ended push-pull idea - thoughts?
- Vintage WE Tubes
- SE amplifier advice..
- Mineature Tubes
- MD SM 102b transformer spec's please
- Vintage Marconi radio
- second order harmonics
- Hybrid amplifier
- Input caps for Motorola Console Amps
- to much gain
- Question - Type 19 tube
- alternative for footswitch??
- Noob. Help PP EL34 / EF86 both as triode schem.
- Yet another LA-2A
- RH84 SE, pentode driver... advice please
- Having an issue with a MOSFET in my Blue Hawaii
- Info wanted on OPT....
- 6P43P Strange Plate Graphs
- Multiple Phono preamp
- pas filament supply
- HV on high voltage amps
- Lageschaar hybrid-connection PSE-KT66
- First DIY from scratch
- Ballance resistors
- casing about SOHA I headphone amp
- Any interest in 56 various tubes?
- Help with exploding tubes!
- My new filiment PS for Push Pull GM70
- So what exactly do I have here? Heathcraft EA-2
- Please help identify this Amveco toroidal transformer.
- first experience with retro electronics
- Revising a tube pre-amp: can't find parts?
- Info for Pioneer SA-810 tube amp
- Has anyone tried tx2575 in cathode resistor?
- 12JZ8
- Is it OK to drill mounting holes in transformer laminations?
- Seeking Sescom Transformer Specs
- Calibrating a Sencor ??
- Capacitor in parallel with negative feedback resistor
- Old electronics repair store closing. Hartford. FYI. Not related
- CL ad for tubes in MA. FYI only. Not connected
- Distortion in amp after warm up
- Re-bias when changing from Triod to Pentode
- Yaqin MC-10L - Electricity in volume knob
- Newbie question about a 300B amplifier
- Modified Wavebourn Tower II ?
- Elevated Heater Voltages - 40v?
- Free Tubes!
- found tube i like, only small bits of red letter,what tube brands used red lettering?
- Impedance problem Of O/P Transformer
- Runaway tubes or tubes drawing excess current--baffling
- croft SD3 CROFT PREAMP
- valve phono stage on a budget
- Dynaco vs. Dynaclone
- Amplifier Problem - Need help!
- Idea for a 6n1p preamp
- K & K Audio Two Terminal Constant Current Source
- 6550 Push Pull noise in power stage
- 6P1P-EV PP guitar amp tryout.
- question about output transformer for guitar amp
- Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
- Counterpoint SA-12 wackyness
- Shuguang SG-50
- manley EQP-1A Tube EQ
- El34 PP advice needed
- Fosgate Punch 800 a4, diagram needed
- Power Transfomer For Valve Amp Question
- a 'simpler' tube/valve mixer topology
- Qustions about centre speaker connection
- Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
- 0d3 for el84 screen regulator
- Edcor XPWR059 power problem
- Did bootstrapping pot change it's operation
- Transformer wiring (Need Help)
- Class-d Hybrid
- New test data comparing different 7591's
- Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
- ZKIT2 Zen Triode mono SET amplifier kit
- Tango 11146 Output Transformers ?
- KT120 Tube
- B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
- Mu follower
- Aronov LS9100 - any info ???
- Tube Preamp Dock
- Substituting potentiometers
- Grounded grid Zout
- HY69 in triode mode...some experience ?
- ITA LA 1B SCHEMATICS????
- Thoughts on PSU
- Bleeder Resistor (Need Help)
- use of 12ax7 and 6v6 as 6T9 alternative?
- Do I want fast settling or massive filtration in PS?
- Positive feedback for amplifier input stage
- Rusted OT Issue?
- Multiple filament windings
- need help with frist tube amp
- Testing Western Electric 437a with TV-7D/U ?
- Graaf 5050
- finished breadboard project
- How Much is Too Much Filtering?
- 2a3 - for car use?
- troubleshooting a Mingda MC34AB
- How to repair and refurbish vintage tube amps?
- How to repair and refurbish vintage tube amps?
- NYAL OTL3 Amps
- 6DJ8/6922 rolling... any general consensus on these?
- Mullard 12AU7 tests bad when running grid leakage test?
- Can you identify this AMP??
- effects of different HT voltage
- Substituting a 12AX7 for a 12DW7
- what to do with 1uF???
- Correct power rating for Chicago OT - opinions
- Need help with Stancor 1.5 K OPT Tran.
- S5 K8-LM mono KIT (total newbie)
- Pentode section of 6M11
- Looking for goodme proven 2A3 SE project
- Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
- Tube replacement causes bias problems.
- Spectra of tube glow: any data?
- Plate Characteristics for 6158 dual triode
- Center tap or not...
- Connecting G3 to a negative supply on a pentode
- Dynaco FM-3 Curcuit Boards
- Sonic Frontiers Line 2 schematic
- Philips Hi Z radio amp
- Need help modifying tube bias circuit
- filament transformer current rating
- SE OT power tube suggestions please!
- What is up with this wave form?
- Volume Controls
- Help identifying driver stage
- Tube mixing console
- Uses for Cheapo 6CB5
- Twin DN2540 in TubelabSE?
- Bias or loss of power in one channel problem
- Drilling a hole in a Tube :)
- Tube stage placement in a mongrel (hybrid) amp
- Tubelab Single Ended
- Quad KT88 driver
- Single Ended Output Transformer
- SE P-P guitar amp.
- 300B with interstage
- Problem with Aria (Meng) Mini 6p1 (glowing plate)
- possible to filter dips in AC line?
- Weston Ammeter Headphone Amp Prototype
- What is the fault with this amp?
- k-12G turret board version
- low voltage "high gain" amp
- Wanted: ELNA Cerafine 10000uf 63v New or used
- Connect ipod/laptop to old 1950's radio
- Percieved Power outputs Tube vs Solid State
- (Weston Ammeter Headphone Amp Redux ?)
- Tube guitar amp for acoustic guitar?
- Would it be possible to drive a 300b with new power jfets?
- Would it be possible to drive a 300b with new power jfets?
- Will KT88 increase output power in Copland CTA-402
- Music Angel XD-SE EL34 intermittent thump
- OPT with cathode feedback
- Rebuilding fisher sa-1000
- Little Dot Mk IV SE
- EF86 on HICKOK 752a tester..??
- Choke power supplies and bypassing.
- Load resistor on OPT
- Ultimate Octal
- Help needed for 6H30 output schematic for DAC
- KT88 doubt
- Leave it on or turn it off?
- 6y6 output tube and Fender Champ(ion)
- Did I do this loadline correctly
- Masco MA-35 rebuild
- Motorola SE console amp blown fuse
- What to do with Telefunken parts?
- OT as buffer?
- Single ended EL84 Schematic
- Pattern for power xmfr magnetic leaking ?
- heater voltage
- Small Speakers for 5 channel single ended amp
- missing circuit components- why?
- valve rectifier series resistors
- What to do with a 6N14P/ECC84
- Info for very rare neon tubes?
- Fender 5F1 Champ clone with triode mode
- UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
- Jan Tube question
- 60 watt tubeamp with Low B+
- What types of SET rock the hardest?
- UTC A16 interstage 300B
- 6C33
- Need wiring schematic for Conn 6050 amp
- 6N6P at very low voltage
- My lineamp， Circuit of MATISSE ATOM
- Transformer Swap
- Need help building a tube linestage for my gainclone
- Ping SY: His Master's Noise
- Wollensak SE 7591 parts projects?
- 807 screen voltage help
- My little 801A power amplifier
- Help needed finding a small DPST switch - confused!
- Help with bias pot- wont adjust!
- 6N6P / ECC99 / E182CC
- bias question
- Really low parts could el84 pp design for a beginner?
- moviola tubes -- other names?
- DHT with TDA1541A in a NOS DAC?
- 6C33C-B Tube Tester
- VT100mk2 - Retubing
- Parallel 6L6 se iron suggestion.
- 6N2 Tube Srpp Drive Stage
- Unexpectedly good EL84 amp
- Kypo Electronic - Buffer, Preamp & Amp kits
- PSU bypass cap type
- Yaqin MC10-T
- Yaqin MC10-L Need help collating data
- Wanted: High Quality Complete tube NOS DAC with TDA1541A
- 6360 or 6939 as a phase inverter
- Peerless 16687 & 7142 Transformer Identification
- Wanted: High Quality DIY Tube NOS DAC with TDA1541A
- Restoration of leak stereo 20: advice pls
- DC Tube Heaters
- Musical Paradise MP-428 300B Amplifier
- Tube regulator
- Why overvoltage on HT?
- 50c5 schematic question
- Me again... matrix decoding w/ tubes?
- chapman 305 transformer wiring
- tube rolling el34 need advice
- Adding resistance to OT circuit.
- Tube pre-amp + Class-D amp. any experience?
- Bias using a ccs as an anode load
- Magnepan High Frequency Tube Amp
- Home-Made Plate Curves
- Vacuum Tube Audio PH-11
- Latest project SRPP valve front end with class D MOSFET output stage.
- Melos 400 restoration project - need help (unaltered reference needed)
- Comparison of Sovtek 5751 and RCA 5751
- Replacing electrolytic caps
- Heater supply for the 866a
- How good is good enough when designing a line stage?
- Cathode/plate resistors ??
- Tubes and LTspice?
- Is this an oscillation problem? -broskie CCA linestage
- Simple Octal SET help.
- Capacitor Sanity Check
- VTVM substitute?
- Caps - Mundorf Silver/oil vs silver/gold/oil
- What music/sound style for 845 tubes?
- Advice Needed
- Favorite ouput tube (SE only)
- Best make of audio valves/tubes
- How to calculate source impedance for audio transformer?