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  1. 807 vs 811A output: Sonic preference?
  2. Cheap PP OPTs
  3. Mc C-22 Ce
  4. Transformer Coupled Linestage
  5. 6CY7 Variants
  6. EZ81 rectifier noise
  7. Any good Output Transformers from China?
  8. Solid Core or Multistrand?
  9. Aikido - alive and kicking butt (not mine!)
  10. Dead Copland CTA-501
  11. Is the E86L the industrial sister of the EL86?
  12. Hammond 1630SEA, worth trying?
  13. Using Gas Regulators
  14. Cheap and Chinese KT88 SE amp
  15. Cary v12 -> V12r Conversion Questions
  16. 15 watts loud enough?
  17. ST70 hybrid finally up and running !!
  18. The Making of a Triode
  19. Spice models
  20. HV SS bench top power supply, advice needed
  21. A new Aikido is born - and kicking butt!
  22. Preamp - DIY vs Audio Research (or similar)
  23. Stromberg-Carlson 433 : Add standby or not?
  24. All-tube digital clock
  25. audible illusions dual mono preamp
  26. Siemens/Klangfim 6.4 mono question..?
  27. James 6123 OPT Wiring Help
  28. Next Bogen Conversion soon - need phase splitter advice
  29. A basic question regarding transformer laminations
  30. TOO many volts ????!!!!
  31. Dynaco Mark VI
  32. Frankenstein
  33. Unity buffer from 7-pin triode?
  34. Heathkit WA-P2 preamp
  35. Internal shield on 6922 dual triode
  36. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  37. 418a
  38. Is it worth biasing with a distortion analyzer ???
  39. Usefulness of 6X8 tube?
  40. reducing hum in SET amps
  41. dynamic loadline
  42. Designing Transformer-Coupled Circuits...
  43. Tube-amp power issues
  44. SCA-35 Dynaco
  45. Q on voltage swing
  46. Buzz on preamp
  47. Help- I'm new!
  48. tube phono stage
  49. Schematic for Gm70!Where to find it!
  50. getting the specs on a transformer
  51. Nixie bargraph as a audio VU-meter
  52. Unique or odd uses for the diyAudio CCS boards
  53. Balanced tube preamp for class D power amps.
  54. 117v heater tube 117n7
  55. bypassing the plate-load
  56. Is this OK for a heater supply?
  57. which gauge wire for PSU????
  58. Citation II OPT?
  59. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  60. Suggested budget pwr sply topologies?
  61. Battery for Cathode Voltage?
  62. Calbest help
  63. PO'ed at RFI
  64. 12B4-A Linestage
  65. Relay Attenuator for tube amp
  66. Aikido and K-1000 headphones?
  67. post poweramp power attenuator
  68. preamp tube for metal
  69. Favorite Output Tube?
  70. CCS Grid Bias
  71. Ring of two CCS for differential triode amp - stability?
  72. Unstacking a transformer...
  73. interconnect cable 15' long
  74. Citation II oscillating, Uh oh
  75. Regulated PowerSupply for Frank's 6SN7 Preamp
  76. Regulating G2 in Pentode Operation
  77. WE310A, a confusing issue
  78. Naming conventions
  79. Newbie: Powering up Tube Amp
  80. preference between 5842 and 6c45pi
  81. Help! first tube pre-amp with 12ax7
  82. S11E12 / 12E1: best operating point ?
  83. 6j5 trasformer coupled driver/splitter
  84. A new audio tube
  85. heretical unity gain OUTPUT stage...
  86. LL1630 Pre amp
  87. New Jensen caps has no bass in..Simple EL84PP
  88. EIMAC toobz : What sort of PSU ?
  89. Filament Transformer for 26 DHT
  90. Valve Pre for Chip Amp
  91. To hell with pride. I need help w. Grounded grid Pre-amp
  92. signal wiring / chassis grounding - Aikido
  93. Power rating for triode/pentode resistors
  94. Unity coupled power amp
  95. 6BX7 Outputs
  96. DIY Preamp for use with Dynaco ST70
  97. +B Power Supply Basics
  98. Tubes and their sweet spots.
  99. How to accomplish local feedback in pp amp ?
  100. Telefunken 5094
  101. Coupling caps size with grid choke?
  102. My first audio project
  103. Relationship Between Inductance And Current In Filter Choke
  104. Harmony H303A
  105. 6C4C - 6S4S - 6B4G op points?
  106. anyone mod a tube ultragain in here?
  107. EL84s glowing red
  108. Found a power transformer, what to do with it?
  109. Output section on preamp questions/breakdown.
  110. Transformer coupled 6AS7/6080
  111. Single Tube RIAA preamp too good to be true?
  112. What to make?
  113. LPT with low triodes?
  114. Ground questions
  115. Help! Upgrade a Music Angel KT88
  116. Need schematic for EL84 PSE
  117. Old OTL circuite question
  118. sub out in my 300b se? Help me please.
  119. Interstage OPT to drive 6V6 pp amplifier
  120. Voltage label on schematics...
  121. mystery purchase of the day
  122. What about the Eimac 3-500z?
  123. How much DC offset can a tube preamp take?
  124. Low voltage drop pass tube
  125. Convergent Legend Preamp
  126. vintage tube amp repair help
  127. Lasers, Tubes, and PCB
  128. 76 operating point/max plate rating?
  129. Mullard Made Tube Source Query
  130. SE Amp with NO HUM
  131. Frrank's 6Sn7 preamp...take out coupling cap??
  132. Need Schematic or help Newcomb AV-10 turntable tube amp
  133. Tube kits for beginners
  134. Lectron JH50 Tube Bias
  135. Tone circuit and other guitar amp Q's
  136. Removing LEDs from chinese amp
  137. Project madness
  138. chinese and tube Depot amps?
  139. eml 520 v2 info
  140. Gibson GA20 schematic needed
  141. Potted Transformer Enclosure Suppliers?
  142. Rogers Cadet III Phono Stage
  143. Modding Roberts/Akai mono block tube amps
  144. Full-wave bridge
  145. Output transformers and frequency response
  146. Class A2 SET using source follower driver
  147. Rectifier that drops lots of volts?
  148. switch snubber on preamp
  149. HV supply please comment before building
  150. This is cool
  151. Gold Lion KT88 Reissues
  152. 6F8G's any good?
  153. Matching capacitors
  154. Tung-Sol (new production) 6550s
  155. Curves, curves, and more curves
  156. Help for new design..
  157. OTL SE - Help Wanted with Idea
  158. OPTs causing crosstalk?
  159. KT88 Usable range
  160. How to change tubes ??? (NEWBIE)
  161. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  162. Need some help with potentiometer.
  163. Pinout of a UTC CG-422 power transformer
  164. Simple EL34 SET; advice?
  165. Popping Noise = Clipping ?
  166. PSU for an 813 SE
  167. Single Stage Line Amp (Diff Amp) Tube?
  168. EL 84 Edicron UK vs JJ
  169. calculating HF rolloff at 20kHz from input impedance
  170. Need info on RCA 813 used in Tube Amp
  171. Baby Huey: shunt feedback doesn't work to me
  172. Audio Innovations 800mkiii output trans needed
  173. High voltage psu
  174. First tubeamp, dont laugh too hard
  175. Newbie building d3A DRD 300B
  176. small practice amp with master volume
  177. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  178. gu81m
  179. 6sc7 vs. 6su7 in LTPI duty
  180. Cascode with ECC81(12AT7)=>Morgan Jones
  181. Where can I find these?
  182. Kofi Annan in: "Seven-Pound Mono Amp"
  183. Kofi Annan in: "Surf Bassin'"
  184. McIntosh Re-cap Questions
  185. 5881
  186. Cary Audio V12 - Schematic - Needed
  187. Anyone tried this method for OTL?
  188. Can't simulate 12AX7 with multisim 7
  189. new member, and some Electrohome PA100Mk1's
  190. Edcor Interstage for Phase Splitter?
  191. Why isodyne splitters not popular...
  192. Low Voltage phono stage for newbies
  193. 6EJ7 or 6EH7 triode strapped?
  194. New Guy
  195. Building a Fender 5E3 Deluxe from scratch.
  196. Counterpoint SA20 Mosfet output rail voltage
  197. Silly Chassis Punch Question...
  198. Tube Noob question
  199. tube shop in the uk
  200. Choke question
  201. Self Bias and Fixed Bias for Big Tubes?
  202. page tubelab.com
  203. Stromberg Carlson ASR433 Question
  204. CCS better in plate or cathode
  205. Audiophile term: "HIP test"
  206. Advice needed for tweaking S5 Electronics K-12G diy kit
  207. TV Damper Diodes
  208. 813 SE circuit,will it work?
  209. Looking for tube for application
  210. Finger joints vs. screw and glue
  211. 2C36 plate curve
  212. EL34 as preamp
  213. with DHT rectifiers, is the "+" side of the power supply...
  214. Paging Unison845
  215. Quad II - Forty
  216. my amplifiers
  217. Cheap spud amp
  218. Dr. Z "Route 66"
  219. Interesting 6L6GC Test Report
  220. 4D32 SE amplifier... help!
  221. 6AS7G with grid current?
  222. bypass switch for preamp
  223. Grounded Grid vs. Aikido
  224. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  225. Could this work? (PP amp with CCS)
  226. about newbies...and textbook..
  227. NFB capacitor to screen tap on ST-70 ?
  228. Aikido question
  229. Help with amp #2, 300B or 6550?
  230. Russian 807
  231. Searching Sound Valves M40 Monoblocks schematic
  232. Make: Bell P/A - Model: Carillon '35'
  233. Octal tubes for 7695-style matrix amp?
  234. SET recommendations
  235. Dynaco ST35
  236. Scott LK-72A is ALIVE
  237. 5687 as a single stage SE amp
  238. Changing two stereo amps into two monos
  239. UL Feedback Tap Calculation
  240. Precision Test Equipment tube tester
  241. Octal pentode sub for ef86?
  242. Help with guitar amp sound
  243. to mach1: tubecad regulator using tl431
  244. Thermal management: it this not really of concern?
  245. Signal phase shift through a tube amp
  246. Common-mode EI PS Chokes
  247. Signal pentode in current production
  248. Pentode vs Ultralinear
  249. Bogen CHA33/CHA33Y
  250. Sheet Metal Gauge

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