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  1. the valve with no markings
  2. Pentode AB1 design school???
  3. Capability of Sony/Tamradio SE Output Transformers
  4. my CELLINI triode amp
  5. 45-based SET -> Pass Labs F4
  6. Testing Amplifiers - Speaker or dummy load
  7. Quiet amp hums with signal source or input directly tied to star earth??
  8. amp output testing
  9. S5 Amp Comparison?
  10. How to Ground a Preamp PCB Board?
  11. RH807 / 6L6GC g2 issues
  12. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  13. sunn solarus guitar amp
  14. Converting Dynaco ST70 Power Transformer for 12.6V
  15. Simple CF with 5687/6900/E182CC
  16. World Audio Design 5881 Schematic needed
  17. PP triode transformer load
  18. 6V6 PP load line
  19. Need help to under stand this 6n3 Kit from ebay
  20. Help:ampeg svt 2 pro 100v>>240v
  21. Blown left channel
  22. Tube preamp build help-heaters
  23. Medium Power SET, EL156 based
  24. Concertina Splitter question - Need help
  25. 6V6 amp - schematic options
  26. Lectron pa50+jh50
  27. 4pr60b valve
  28. Transformer phase splitter
  29. Help! ground hum
  30. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  31. Recommended upgrades for Yaqin Tube Buffer ?
  32. 6J5 or 6S4 mic amp?
  33. ST-70 build, ideas and advice
  34. Yaqin MC-100B Help Needed!
  35. Preamp Aikido : 6ax5GT,12au7,2c51
  36. Heater of tube
  37. R-Core Winders
  38. 1946 philco amp, tuner, record player
  39. otions for drawing tube schematics on Mac..?
  40. Push/Pull Plate Load Choke - how to figure Inductance?
  41. 6aw8-a tube question
  42. Newbie needs a point in the right direction
  43. Minimalist PL519 OTL?
  44. Telefunken schematics
  45. parallel pp EL84
  46. AD1 Operating Question
  47. 6П3С-Е Russian NOS: Gas Problem
  48. Favourite EL34 circuit
  49. Medium power SET with parallel OP tubes
  50. sds labs into Pas3
  51. Low voltage 6922 preamp...wanting a schematic
  52. Voltage Gain on Long Tailed Drivers
  53. Purpose of 5842 tube?!?
  54. MA XDSE KT88 vs YAQIN MC-100B KT88
  55. JBL Amplifier story
  56. Fender tweed pro-amp clone
  57. Recommended spacing for multiple 5AR4's
  58. Cap choices coupling
  59. Output transformer for PP EL34 source
  60. mini max pre
  61. use 2 ohm speakers
  62. Ask tube rect 5u4c and JJ caps
  63. Adding caps to prevent oscilation in AF 5687
  64. Williamson on EL84. Is it worth doing?
  65. CCS and regulated B+
  66. Garter cross-coupled feedback
  67. soundcard protection Z ???
  68. Using a CCS on SE Output Stage
  69. First amp build... help please!
  70. multiple independent grid biasing from 1 mosfet
  71. Eico HF-81 modification opinion
  72. 4K or 5K Output Transformer
  73. Noisy input on Michaelson & Austin TVA-1
  74. Precision Electronics S-35 help,
  75. Rogers Cadet 3 Problem
  76. Triode Electronics VS Hammond
  77. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  78. Start up delay needed???
  79. Connecting a stereo amp as a mono-block
  80. HQ-DHT (All tube DHT amli) 26-45-2A3
  81. 24A tube in triode mode, help !!!
  82. Amperite Ballast
  83. Need super quiet 6.3V filament supply schematic
  84. (Sound Space)Houston 2A3 Power Amplifier
  85. James Burgess 2A3 Monoblocks
  86. Funny tube tale from southamerica
  87. RCA 7189 Black Plates
  88. Preamp nasty noise and hum
  89. EDCOR VS One Electron
  90. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  91. Robinhood output transformers?
  92. looking for help diagnosing volume loss on tube amplified reel to reel player
  93. Question about power consumption Hagerman Cornet Octal
  94. valve rectifier in PSUD
  95. Can you explain what this is ?
  96. volume rise with frequency problem
  97. 1 + 1 = 3 :)
  98. What would the perfect multi-way speaker for a tube amp look like?
  99. GU50 compared with EL84
  100. Counterpoint SA-4 manual and schematics
  101. Ever heard of a Valvo 16ECC ?
  102. the Reversal SRPP
  103. Want to build a C3G linestage
  104. 30A5 tubes
  105. Good speakers to match a K-12
  106. Driving Long Cables, how much current?
  107. twin triode question
  108. Am I going to blow up my 7189s
  109. How is wattage calculated when only using a single section?
  110. Counterpoint SA5 problems and a question.
  111. Headphone Amplifier 6922EH
  112. Fuse Clip for Small Plate Cap Use
  113. Advice sought on medium power triode for tube headphone amplifier
  114. Not the 111M; A Precise 116 Tube Tester
  115. Input stage
  116. Does anyone have any FFT plots from real Class-AB tube amps?
  117. Testing for a Damaged Output Trafo
  118. What has happened to WE Huntsville lately?
  119. Output Transformers Sun HCT 1003 KT
  120. Plexiglass case for small tubes?
  121. 100 Best Sound Tubes
  122. Input tube bias
  123. eschematic amplifier sinle end 12at7 6av6 6bq5
  124. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  125. HV using zener diode
  126. Akai M8 rebuild up and running!
  127. Best current production 2a3
  128. what happens when plugging a stereo source into mono jack on a tube amp?
  129. Transformer coupled Gainclone idea.
  130. Audio Research VT100
  131. output transformer turns per volt
  132. valves and metal cones= bad mating?
  133. Why do you need a grid to ground resistor on a line stage?
  134. Need some help with RIAA Preamp
  135. Swapping transformer cores
  136. got hold of a bunch of tubes...
  137. output transformer secondary configuration
  138. WE/Ultrapath B+ Where?
  139. Blending 12ax7 parallel gain stages
  140. Sudden spark.
  141. Priboj Reborn
  142. Misunderstand of sijosae schematic
  143. 12AX7 Identification
  144. GM70 Datasheet Error!!
  145. Using old Hammond iron
  146. Need confirmation on LED bias for circuit
  147. Tone control problems
  148. Tube Parameter "Attenuation, Harmonic" What is it?
  149. Bias adjust on '65 Twin Reverb Reissue AB763 - 2004?
  150. Need HELP on Randall RGT100ES 6L6 to EL34
  151. Tube amp with Dual Triode
  152. Fisher X-101-C bias question
  153. DC Current-Regulated 300B filaments?
  154. Anyone ever use DC to heat rectifier tubes?
  155. Tantalum Resistor Watt?
  156. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  157. Best sounding remote control volume
  158. plate and screen voltage
  159. 12AT7 plate voltage
  160. Latest LTspice giving crazy FFT results
  161. Dynakit PC-3A as a balance pre?
  162. e283cc better sounding than?
  163. Porchlight Scratchbuild
  164. No output and Loud squeals! Help!
  165. Low mu triode for phase splitter
  166. Help figuring which is the center tap???
  167. Help with Paco SA-40
  168. Best tube/sonics
  169. One Half 12AU7
  170. 1939 Novachord - 163 Tube Monster!!
  171. Gyrators to replace PSU chokes?
  172. Output trannies for 6as7
  173. 2 Toroids = 1 Isolation Transformer?
  174. Finding Transformer Building Supplies
  175. Sagging Heaters
  176. Kofi Annan in: "Kofi's Baby Huey"
  177. Point to point wiring help
  178. help !! PTT2s Line stage
  179. Rickard Berglund, Sweden
  180. "The Sussex Homebrew Valve Tester"
  181. clipping
  182. Wanted: a couple of UNF bolts
  183. H-Bridge Amp Design
  184. need help with yaqin mc10l
  185. Watt the?
  186. DIY tube preamp with 5687
  187. Help with tube stereo build
  188. Tube recommendation for speakers
  189. Bogen mx60a Schematic
  190. Eliminating volume pot?
  191. CXPP100-MS-3.3K or CXPP100-MS-4.2K
  192. tube power supply voltage
  193. Driver Bypass Cap - Value?
  194. Tube bases and plate caps rant
  195. tube dual regulated psu needs amp
  196. Help me choose output transformers
  197. 12GT5-guitar amp.
  198. Verdier dual regulated tube psu
  199. Aikido Phono Amp Output Tubes 12AU7 and 12AX7?
  200. Mullard EL84 ID
  201. schematic request for transformer with 4k primary and UL taps
  202. Plate-Grid feedback: How to get better than DHT performance from cheaper tubes
  203. Anyone going to the Dayton Hamfest?
  204. More class D madness
  205. the SuperHybrid
  206. Tecon Model "55" final mods(?)
  207. Hammond P-T125E OPT
  208. Highbred Amp "TUMOS" Sounds good?
  209. 300B SET which chassis design
  210. Help with creating a simple tube HV regulated supply
  211. Tube Sockets for oddball miniatures
  212. McGohan M506 PA Guitar conversion mods.
  213. Bogen chb35a
  214. My last el84 PP tube amplifier
  215. Ultrapath - Advantages?
  216. Phono preamp with c/em2
  217. 12AY7 plate current
  218. OPT identification
  219. Resistor values at supply to anodes
  220. Typical output impedance for tube amps
  221. Problems with EM87 stereo level indicator for computer line out
  222. VR tube recommendation
  223. Mills MRA-5 resistors in tube circuits
  224. B&K Dyna-Quik 500 shows good tubes as Shorted
  225. Output transformers
  226. dbx 386 upgrade
  227. Sub 6n6p for 6n1p?
  228. SET Amp History in Japan
  229. Grid Bias or Cathode Bias
  230. Oscillating CJ PV-5
  231. FireFly Single Ended Tetrode
  232. Aikido front end for a SE 6C33S
  233. Ground Plane vs Star earth
  234. Circuit board with long post??
  235. ecc804 as Phase Splitter
  236. What can you do with a 3a5?
  237. Auto Wave soldering sockets
  238. Using diode for biasing
  239. No bass in 300b amp
  240. Tube socket and pin cleaning
  241. Help With Left Channel Hum
  242. Volume pot has rustling sound
  243. How best to distribute heater windings
  244. 30MB6 data
  245. Kofi Annan in: "Pushed and Pulled Back!"
  246. How dangerous is it to build an SET?
  247. 6as7 SE OTL
  248. Melody Roll
  249. 8417 Output Transformer
  250. Do you still need matched tubes if running a CCS ?

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