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  1. EL84s glowing red
  2. Found a power transformer, what to do with it?
  3. Output section on preamp questions/breakdown.
  4. Transformer coupled 6AS7/6080
  5. Single Tube RIAA preamp too good to be true?
  6. What to make?
  7. LPT with low triodes?
  8. Ground questions
  9. Help! Upgrade a Music Angel KT88
  10. Need schematic for EL84 PSE
  11. Old OTL circuite question
  12. sub out in my 300b se? Help me please.
  13. Interstage OPT to drive 6V6 pp amplifier
  14. Voltage label on schematics...
  15. mystery purchase of the day
  16. What about the Eimac 3-500z?
  17. How much DC offset can a tube preamp take?
  18. Low voltage drop pass tube
  19. Convergent Legend Preamp
  20. vintage tube amp repair help
  21. Lasers, Tubes, and PCB
  22. 76 operating point/max plate rating?
  23. Mullard Made Tube Source Query
  24. SE Amp with NO HUM
  25. Frrank's 6Sn7 preamp...take out coupling cap??
  26. Need Schematic or help Newcomb AV-10 turntable tube amp
  27. Tube kits for beginners
  28. Lectron JH50 Tube Bias
  29. Tone circuit and other guitar amp Q's
  30. Removing LEDs from chinese amp
  31. Project madness
  32. chinese and tube Depot amps?
  33. eml 520 v2 info
  34. Gibson GA20 schematic needed
  35. Potted Transformer Enclosure Suppliers?
  36. Rogers Cadet III Phono Stage
  37. Modding Roberts/Akai mono block tube amps
  38. Full-wave bridge
  39. Output transformers and frequency response
  40. Class A2 SET using source follower driver
  41. Rectifier that drops lots of volts?
  42. switch snubber on preamp
  43. HV supply please comment before building
  44. This is cool
  45. Gold Lion KT88 Reissues
  46. 6F8G's any good?
  47. Matching capacitors
  48. Tung-Sol (new production) 6550s
  49. Curves, curves, and more curves
  50. Help for new design..
  51. OTL SE - Help Wanted with Idea
  52. OPTs causing crosstalk?
  53. KT88 Usable range
  54. How to change tubes ??? (NEWBIE)
  55. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  56. Need some help with potentiometer.
  57. Pinout of a UTC CG-422 power transformer
  58. Simple EL34 SET; advice?
  59. Popping Noise = Clipping ?
  60. PSU for an 813 SE
  61. Single Stage Line Amp (Diff Amp) Tube?
  62. EL 84 Edicron UK vs JJ
  63. calculating HF rolloff at 20kHz from input impedance
  64. Need info on RCA 813 used in Tube Amp
  65. Baby Huey: shunt feedback doesn't work to me
  66. Audio Innovations 800mkiii output trans needed
  67. High voltage psu
  68. First tubeamp, dont laugh too hard
  69. Newbie building d3A DRD 300B
  70. small practice amp with master volume
  71. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  72. gu81m
  73. 6sc7 vs. 6su7 in LTPI duty
  74. Cascode with ECC81(12AT7)=>Morgan Jones
  75. Where can I find these?
  76. Kofi Annan in: "Seven-Pound Mono Amp"
  77. Kofi Annan in: "Surf Bassin'"
  78. McIntosh Re-cap Questions
  79. 5881
  80. Cary Audio V12 - Schematic - Needed
  81. Anyone tried this method for OTL?
  82. Can't simulate 12AX7 with multisim 7
  83. new member, and some Electrohome PA100Mk1's
  84. Edcor Interstage for Phase Splitter?
  85. Why isodyne splitters not popular...
  86. Low Voltage phono stage for newbies
  87. 6EJ7 or 6EH7 triode strapped?
  88. New Guy
  89. Building a Fender 5E3 Deluxe from scratch.
  90. Counterpoint SA20 Mosfet output rail voltage
  91. Silly Chassis Punch Question...
  92. Tube Noob question
  93. tube shop in the uk
  94. Choke question
  95. Self Bias and Fixed Bias for Big Tubes?
  96. page tubelab.com
  97. Stromberg Carlson ASR433 Question
  98. CCS better in plate or cathode
  99. Audiophile term: "HIP test"
  100. Advice needed for tweaking S5 Electronics K-12G diy kit
  101. TV Damper Diodes
  102. 813 SE circuit,will it work?
  103. Looking for tube for application
  104. Finger joints vs. screw and glue
  105. 2C36 plate curve
  106. EL34 as preamp
  107. with DHT rectifiers, is the "+" side of the power supply...
  108. Paging Unison845
  109. Quad II - Forty
  110. my amplifiers
  111. Cheap spud amp
  112. Dr. Z "Route 66"
  113. Interesting 6L6GC Test Report
  114. 4D32 SE amplifier... help!
  115. 6AS7G with grid current?
  116. bypass switch for preamp
  117. Grounded Grid vs. Aikido
  118. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  119. Could this work? (PP amp with CCS)
  120. about newbies...and textbook..
  121. NFB capacitor to screen tap on ST-70 ?
  122. Aikido question
  123. Help with amp #2, 300B or 6550?
  124. Russian 807
  125. Searching Sound Valves M40 Monoblocks schematic
  126. Make: Bell P/A - Model: Carillon '35'
  127. Octal tubes for 7695-style matrix amp?
  128. SET recommendations
  129. Dynaco ST35
  130. Scott LK-72A is ALIVE
  131. 5687 as a single stage SE amp
  132. Changing two stereo amps into two monos
  133. UL Feedback Tap Calculation
  134. Precision Test Equipment tube tester
  135. Octal pentode sub for ef86?
  136. Help with guitar amp sound
  137. to mach1: tubecad regulator using tl431
  138. Thermal management: it this not really of concern?
  139. Signal phase shift through a tube amp
  140. Common-mode EI PS Chokes
  141. Signal pentode in current production
  142. Pentode vs Ultralinear
  143. Bogen CHA33/CHA33Y
  144. Sheet Metal Gauge
  145. Help with 6N6p
  146. Can anyone help, identifing selenium bridge hookup please.
  147. E182CC substitution ?
  148. Face Plate Printing and Silk Screening
  149. Funky reading 12B4A?
  150. Sovtek 5Y3 Issues
  151. from lilliput to gargantua (just for fun)
  152. Formula for calculating HT voltage?
  153. DIY Headamp for Sennheiser-650?
  154. Nuera Tube Amps
  155. Amplifier identification
  156. Perfect tube regulator
  157. Value of grid leak resistor
  158. Comments on this circuit
  159. Just grabbed this AF mesuring equipement, Any infos before restauration is Welcome
  160. Heater current monitoring...
  161. on-off switch position in PSU
  162. A better LDO heater regulator
  163. Guitar Head Amp Schematic
  164. any feedback on Russian gas regulators like SG4S and etc.?
  165. Some cathode follower questions
  166. rectifier voltage drop
  167. Anyone please explain"What is an A1,A2 in SE amp?
  168. Interesting link for guitar amps
  169. What is the correct plate voltage in this circuit?
  170. Any1 have an Osmond PCB library for tubes?
  171. best type cap for preamp PSU
  172. Steve Bench PP loadlines
  173. single Diode power supply?
  174. Spice Error
  175. Anyone have a Welborne Labs amp?
  176. Please help out a Noobie...
  177. wellborne labs
  178. best schematic designer for tubes?
  179. hum in 1 channel
  180. B+ time delay relay
  181. something is wrong with the shunt regulator
  182. Suggestions for a high end tube amp kit
  183. Conrad Johnson PV 7 problem
  184. Math to calc optimal voltage of tube dac to match amp input sensitivity?
  185. Power supply dilemma
  186. Transformer Placement 5E3
  187. Please help: no sound and blown fuse
  188. sparking Output transformer In Webcor 14x240 Amp
  189. Designing my very first tube amp...
  190. Diode bridge for Valve Buffered GC
  191. 6S41S (6C41C) Amplifier
  192. audio research sp11 upgrade help please
  193. The good, the bad, and the ugly OTL amplifiers
  194. Z2b tube rectifier
  195. Sparks inside GZ34
  196. Help with EV4417 6cm5/EL36
  197. Guitar Amps, Overdrive Pedals, and Space Charged Tubes
  198. My Cornet2 Tube Phono Preamp
  199. bright switch to bias circuit?
  200. Regulated AC...thought some of you might be interested
  201. Aikido PSU - integrated or standalone???
  202. Frank Philipse's tube site
  203. World' smallest GM-70 set
  204. Question on output hum on tube amp?
  205. Aikido Preamp
  206. Argh!!
  207. EL84 bias point
  208. Coupling cap rating
  209. Regulated power supply
  210. outstanding book??
  211. when the datasheet says "vertical mounting: up or down", does it mean...
  212. half wave rectifier will not saturate transformer core?
  213. Did I get in over my head too soon?!?
  214. Parallel output tubes
  215. Dropping filament volts/ L-W ramblings
  216. Rogers Cadet III Power problem ?
  217. about bi-cap
  218. HOT Iron ?
  219. how to set current in G Pimm's latest self-biasing CCS circuit?
  220. Low pass active tube crossover
  221. Ecological recycling amplifier (6CU6)
  222. Need ECF80 / 6BL8 tube spice 3f4 model
  223. Capacitor above chassis
  224. PS Help
  225. Bogen-Stein! mx60a mx-60a mo100a mo-100a
  226. Transmitter tubes
  227. Power Supply Construction
  228. what are the advantages of double core output transformers vs EI ?
  229. What is a reasonable amount ripple voltage for a 300B?
  230. "Old Like" sound transformer with a Tube !
  231. I coined the phrase HIGH VIVIDITY, to differentiate our amps from High Fidelity ones
  232. P-P resistance oddity
  233. Tube preamp vs. solid state
  234. 6l6 penthode triode
  235. Rising hum when turntable is plugged into preamp ??
  236. 6SL7 or 6SL7GT for broken Tubalizer
  237. Aikido PCB and AC filaments.
  238. Help with 300b proyect.
  239. 6P14P Amp Scratch Build
  240. 6GH8 - A Little Off?
  241. design and personality
  242. An all DHT push pull amp.
  243. Junk Pile Linestage
  244. need tube rectifier info
  245. Question on voltages
  246. How to change this design from penthode to triode or UL
  247. what glass-ware program?
  248. aikido 12b4 input 6sn7 output???
  249. GZ34 and temperature
  250. schematic search crate bv-60

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