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  1. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  2. 418a
  3. Is it worth biasing with a distortion analyzer ???
  4. Usefulness of 6X8 tube?
  5. reducing hum in SET amps
  6. dynamic loadline
  7. Designing Transformer-Coupled Circuits...
  8. Tube-amp power issues
  9. SCA-35 Dynaco
  10. Q on voltage swing
  11. Buzz on preamp
  12. Help- I'm new!
  13. tube phono stage
  14. Schematic for Gm70!Where to find it!
  15. getting the specs on a transformer
  16. Nixie bargraph as a audio VU-meter
  17. Unique or odd uses for the diyAudio CCS boards
  18. Balanced tube preamp for class D power amps.
  19. 117v heater tube 117n7
  20. bypassing the plate-load
  21. Is this OK for a heater supply?
  22. which gauge wire for PSU????
  23. Citation II OPT?
  24. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  25. Suggested budget pwr sply topologies?
  26. Battery for Cathode Voltage?
  27. Calbest help
  28. PO'ed at RFI
  29. 12B4-A Linestage
  30. Relay Attenuator for tube amp
  31. Aikido and K-1000 headphones?
  32. post poweramp power attenuator
  33. preamp tube for metal
  34. Favorite Output Tube?
  35. CCS Grid Bias
  36. Ring of two CCS for differential triode amp - stability?
  37. Unstacking a transformer...
  38. interconnect cable 15' long
  39. Citation II oscillating, Uh oh
  40. Regulated PowerSupply for Frank's 6SN7 Preamp
  41. Regulating G2 in Pentode Operation
  42. WE310A, a confusing issue
  43. Naming conventions
  44. Newbie: Powering up Tube Amp
  45. preference between 5842 and 6c45pi
  46. Help! first tube pre-amp with 12ax7
  47. S11E12 / 12E1: best operating point ?
  48. 6j5 trasformer coupled driver/splitter
  49. A new audio tube
  50. heretical unity gain OUTPUT stage...
  51. LL1630 Pre amp
  52. New Jensen caps has no bass in..Simple EL84PP
  53. EIMAC toobz : What sort of PSU ?
  54. Filament Transformer for 26 DHT
  55. Valve Pre for Chip Amp
  56. To hell with pride. I need help w. Grounded grid Pre-amp
  57. signal wiring / chassis grounding - Aikido
  58. Power rating for triode/pentode resistors
  59. Unity coupled power amp
  60. 6BX7 Outputs
  61. DIY Preamp for use with Dynaco ST70
  62. +B Power Supply Basics
  63. Tubes and their sweet spots.
  64. How to accomplish local feedback in pp amp ?
  65. Telefunken 5094
  66. Coupling caps size with grid choke?
  67. My first audio project
  68. Relationship Between Inductance And Current In Filter Choke
  69. Harmony H303A
  70. 6C4C - 6S4S - 6B4G op points?
  71. anyone mod a tube ultragain in here?
  72. EL84s glowing red
  73. Found a power transformer, what to do with it?
  74. Output section on preamp questions/breakdown.
  75. Transformer coupled 6AS7/6080
  76. Single Tube RIAA preamp too good to be true?
  77. What to make?
  78. LPT with low triodes?
  79. Ground questions
  80. Help! Upgrade a Music Angel KT88
  81. Need schematic for EL84 PSE
  82. Old OTL circuite question
  83. sub out in my 300b se? Help me please.
  84. Interstage OPT to drive 6V6 pp amplifier
  85. Voltage label on schematics...
  86. mystery purchase of the day
  87. What about the Eimac 3-500z?
  88. How much DC offset can a tube preamp take?
  89. Low voltage drop pass tube
  90. Convergent Legend Preamp
  91. vintage tube amp repair help
  92. Lasers, Tubes, and PCB
  93. 76 operating point/max plate rating?
  94. Mullard Made Tube Source Query
  95. SE Amp with NO HUM
  96. Frrank's 6Sn7 preamp...take out coupling cap??
  97. Need Schematic or help Newcomb AV-10 turntable tube amp
  98. Tube kits for beginners
  99. Lectron JH50 Tube Bias
  100. Tone circuit and other guitar amp Q's
  101. Removing LEDs from chinese amp
  102. Project madness
  103. chinese and tube Depot amps?
  104. eml 520 v2 info
  105. Gibson GA20 schematic needed
  106. Potted Transformer Enclosure Suppliers?
  107. Rogers Cadet III Phono Stage
  108. Modding Roberts/Akai mono block tube amps
  109. Full-wave bridge
  110. Output transformers and frequency response
  111. Class A2 SET using source follower driver
  112. Rectifier that drops lots of volts?
  113. switch snubber on preamp
  114. HV supply please comment before building
  115. This is cool
  116. Gold Lion KT88 Reissues
  117. 6F8G's any good?
  118. Matching capacitors
  119. Tung-Sol (new production) 6550s
  120. Curves, curves, and more curves
  121. Help for new design..
  122. OTL SE - Help Wanted with Idea
  123. OPTs causing crosstalk?
  124. KT88 Usable range
  125. How to change tubes ??? (NEWBIE)
  126. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  127. Need some help with potentiometer.
  128. Pinout of a UTC CG-422 power transformer
  129. Simple EL34 SET; advice?
  130. Popping Noise = Clipping ?
  131. PSU for an 813 SE
  132. Single Stage Line Amp (Diff Amp) Tube?
  133. EL 84 Edicron UK vs JJ
  134. calculating HF rolloff at 20kHz from input impedance
  135. Need info on RCA 813 used in Tube Amp
  136. Baby Huey: shunt feedback doesn't work to me
  137. Audio Innovations 800mkiii output trans needed
  138. High voltage psu
  139. First tubeamp, dont laugh too hard
  140. Newbie building d3A DRD 300B
  141. small practice amp with master volume
  142. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  143. gu81m
  144. 6sc7 vs. 6su7 in LTPI duty
  145. Cascode with ECC81(12AT7)=>Morgan Jones
  146. Where can I find these?
  147. Kofi Annan in: "Seven-Pound Mono Amp"
  148. Kofi Annan in: "Surf Bassin'"
  149. McIntosh Re-cap Questions
  150. 5881
  151. Cary Audio V12 - Schematic - Needed
  152. Anyone tried this method for OTL?
  153. Can't simulate 12AX7 with multisim 7
  154. new member, and some Electrohome PA100Mk1's
  155. Edcor Interstage for Phase Splitter?
  156. Why isodyne splitters not popular...
  157. Low Voltage phono stage for newbies
  158. 6EJ7 or 6EH7 triode strapped?
  159. New Guy
  160. Building a Fender 5E3 Deluxe from scratch.
  161. Counterpoint SA20 Mosfet output rail voltage
  162. Silly Chassis Punch Question...
  163. Tube Noob question
  164. tube shop in the uk
  165. Choke question
  166. Self Bias and Fixed Bias for Big Tubes?
  167. page tubelab.com
  168. Stromberg Carlson ASR433 Question
  169. CCS better in plate or cathode
  170. Audiophile term: "HIP test"
  171. Advice needed for tweaking S5 Electronics K-12G diy kit
  172. TV Damper Diodes
  173. 813 SE circuit,will it work?
  174. Looking for tube for application
  175. Finger joints vs. screw and glue
  176. 2C36 plate curve
  177. EL34 as preamp
  178. with DHT rectifiers, is the "+" side of the power supply...
  179. Paging Unison845
  180. Quad II - Forty
  181. my amplifiers
  182. Cheap spud amp
  183. Dr. Z "Route 66"
  184. Interesting 6L6GC Test Report
  185. 4D32 SE amplifier... help!
  186. 6AS7G with grid current?
  187. bypass switch for preamp
  188. Grounded Grid vs. Aikido
  189. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  190. Could this work? (PP amp with CCS)
  191. about newbies...and textbook..
  192. NFB capacitor to screen tap on ST-70 ?
  193. Aikido question
  194. Help with amp #2, 300B or 6550?
  195. Russian 807
  196. Searching Sound Valves M40 Monoblocks schematic
  197. Make: Bell P/A - Model: Carillon '35'
  198. Octal tubes for 7695-style matrix amp?
  199. SET recommendations
  200. Dynaco ST35
  201. Scott LK-72A is ALIVE
  202. 5687 as a single stage SE amp
  203. Changing two stereo amps into two monos
  204. UL Feedback Tap Calculation
  205. Precision Test Equipment tube tester
  206. Octal pentode sub for ef86?
  207. Help with guitar amp sound
  208. to mach1: tubecad regulator using tl431
  209. Thermal management: it this not really of concern?
  210. Signal phase shift through a tube amp
  211. Common-mode EI PS Chokes
  212. Signal pentode in current production
  213. Pentode vs Ultralinear
  214. Bogen CHA33/CHA33Y
  215. Sheet Metal Gauge
  216. Help with 6N6p
  217. Can anyone help, identifing selenium bridge hookup please.
  218. E182CC substitution ?
  219. Face Plate Printing and Silk Screening
  220. Funky reading 12B4A?
  221. Sovtek 5Y3 Issues
  222. from lilliput to gargantua (just for fun)
  223. Formula for calculating HT voltage?
  224. DIY Headamp for Sennheiser-650?
  225. Nuera Tube Amps
  226. Amplifier identification
  227. Perfect tube regulator
  228. Value of grid leak resistor
  229. Comments on this circuit
  230. Just grabbed this AF mesuring equipement, Any infos before restauration is Welcome
  231. Heater current monitoring...
  232. on-off switch position in PSU
  233. A better LDO heater regulator
  234. Guitar Head Amp Schematic
  235. any feedback on Russian gas regulators like SG4S and etc.?
  236. Some cathode follower questions
  237. rectifier voltage drop
  238. Anyone please explain"What is an A1,A2 in SE amp?
  239. Interesting link for guitar amps
  240. What is the correct plate voltage in this circuit?
  241. Any1 have an Osmond PCB library for tubes?
  242. best type cap for preamp PSU
  243. Steve Bench PP loadlines
  244. single Diode power supply?
  245. Spice Error
  246. Anyone have a Welborne Labs amp?
  247. Please help out a Noobie...
  248. wellborne labs
  249. best schematic designer for tubes?
  250. hum in 1 channel

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