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

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