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  1. How would you build a hybrid LM3xxx amp?
  2. Tade no tube amp!
  3. Sherwood 5500
  4. Most accurate way of matching triodes ?
  5. Help Identify This AMP!
  6. Old Tube Equipment Turnon
  7. Current Sourced Cathode Follower
  8. Tube Tester Data
  9. noob pre/pwer amp recording ?s
  10. Anyone heard of "in-rush" limiter resistor
  11. Will adding a 10H/125mA choke hurt bass performance
  12. Fixed bias vs. auto bias
  13. Not your average output transformer problem
  14. Balanced Audio Technology VK 3i preamplifier
  15. Musical Fidelity X10-D - changing tubes problem
  16. power transformers in series
  17. Loud sudden rumbling when turn on amp
  18. Help with tube amplification?
  19. UTC CG-431 Terminal Arrangement
  20. Mingda MC34B tweaks
  21. Symphonic Line Die Erleuchtung Reference
  22. 6SL7 Diffamp front end
  23. PT/OPT Orientation questions
  24. Effect of using 50k pot instead of 100k pot in tube preamp?
  25. Using the Crowhurst articles and Claus Byrith
  26. 12SX7
  27. Bridge SE amplifier
  28. Cad Sw
  29. Kit amps in the UK
  30. ECC82 based preamp
  31. How important is the coupling cap?
  32. any pcb layout for marshall standard 50w valve amp ?
  33. pentode driven 300b set amp - any info?
  34. Circlotron Preamp with ECC88.
  35. Removing tone controls - Need a little help
  36. SE EL84 amplifier schematics
  37. Output coupling - Choke-coil method?
  38. 7788 tube mic preamp design
  39. Amperex 6085 Tube- Where to Buy?
  40. Can a 5687 drive four 813's in triode mode ?
  41. Schematics needed for Heathkit S33
  42. Tube Sparking
  43. Vacuum Tube Pre O.C.L.
  44. Why no single triode OTL power stages?
  45. 6922 .2 sections in parallel
  46. Pre-amp input remote control
  47. Any benefit to DC heater on parallel supply rectifier (GZ34)?
  48. Relpacing 6EU7s with 12AX7s - Good idea?
  49. These Valves good for anything?
  50. buzz problem
  51. Help with trafo
  52. Svetlana EL509 III tubes
  53. Noise on Aikido output
  54. Book “Single Ended Amplifiers” by John (not Gordon) Rankin
  55. EV4417 6CM5 (6x) P-P Amp Schematic
  56. Need recommendation for cathode bypass cap
  57. Simplest flea-powered amp?
  58. Decisions, Decisions - Help me select iron
  59. 966 mercury vapor rectifier
  60. Sound Practices CDs
  61. Question about DIY EL34PP amp
  62. noisy noisy noisy noisy noisy tube
  63. Help needed lowering B+ for DIY amp
  64. 6SN7 CCS
  65. Russian 6L6 family sketchy?
  66. HT regulator using 78xx
  67. Audio Research CA50
  68. Granite tiles
  69. SE Triode amp for a newbie
  70. tube is flashing and glowing very bright!
  71. Suggestions for another amplifier project.
  72. almost just another newbie thread...
  73. Bogen PA--->Guitar Amp, few questions
  74. ts9 pt9 triode
  75. help Etude 124BA keep blowing fuse.
  76. Metal 6L6s?
  77. Hybrid amplifier help...
  78. Tube input and mosfet output
  79. musical fidelity f22 schematic wanted
  80. An intriguing 300B SE-direct-coupled-amplifier
  81. Output capacitor
  82. Cascoded Long Tail Pair Inferno!
  83. Tube ornamental rim
  84. What should be mod first in my amp
  85. EL504/PL504 spice model
  86. Long Tail Pair Phase Inverter with Penthode ?
  87. new spice models available
  88. Output Capacitor Value
  89. Popular tube websites notifier
  90. Convergent Preamplifier Schematich
  91. Source of tubes & associated stuff in Sydney?
  92. Projects involving EF50 tubes?
  93. Kt77?
  94. Best way to translate schematic into actual layout?
  95. Clean to breakup range
  96. 26 preamp problem
  97. mono tube microphone preamp
  98. Help designing a tube amp...
  99. MJE350 pinout and ccs issue
  100. KGB- DC Coupled Hybrid Balance OTL/OCL HeadAmp
  101. negative voltage doubler for ccs
  102. Loftin-White
  103. SET amp from 1619 driving a 809. Opinion wanted.
  104. Re:preamp sputtering noise
  105. Building an ECL82 Single Ended Amp ...
  106. help a newbie build his first tube project
  107. Mercury Vapour rectifiers
  108. El Cheapo Circlotron PSU question....
  109. lookin for a tube buffer
  110. Baby SET w/6FD7 and ilk, for Bas and others....
  111. py500A question
  112. Mundorf Silver-oil VS Jensen copper foil
  113. Can you run a Fender Twin Reverb with only two 6L6's?
  114. Drawing Schematics for Tubes
  115. Drive Current for EL509 Enhanced Triode
  116. How to use Svetlana 6d22s?
  117. James Singapore
  118. Oil Filled Capacitor not upright OK?
  119. Aikido using a #26 tube?
  120. Tube and DIY Newbie Kel84 vs Stoetkit Jr.2
  121. ZOTL and ferrites
  122. 6V6 vs EL84 SE UL
  123. Speaker questions for a Silvertone 1472
  124. Component selection
  125. Snap sound on preamp powerup
  126. Secondary voltage for heaters
  127. good schematic archive site
  128. Transitional SIlvertoneAmp between 1472 and 1482?
  129. Cheap Source for Hammond 125ESE
  130. PCF801 - pentode section has remote or sharp cut-off?
  131. Tube as a desk lamp
  132. Ella EL34 Bias Help
  133. tube diy can or can t
  134. Quad II Problems
  135. Choke input P/supply and critical damping
  136. balanced grounded grid preamp
  137. Fluorescent ballasts in SE
  138. Hammond Transformers and EZ80/EZ81
  139. Look what I found this weekend!
  140. Question on 300B tubes from Parts Connexion
  141. Russian Tubes
  142. Help a first timer to select...
  143. GE 5692 BLACK base?
  144. sources on the web for chinese amps
  145. How much capacitance in a power supply
  146. Parallel 12AT7 for 2A3 driver?
  147. Maida's regulator
  148. Common Mode Chokes for Heater Supplies
  149. Ming Da MC34B....passive or active pre amp?
  150. tube power supply upgrade... elna's, RTX, infinicap
  151. What tube do you think this OPT matches?
  152. safety fuse
  153. Short and sweet review of Sun Audio SV-300BE
  154. Help selecting a DIY schematic
  155. OP Transformer power rating guesstimate
  156. need a lot help on an el34 project :P
  157. Anode Follower
  158. CCS for tubes/valves: PCBs
  159. Improvement to DM's Generic Triode Model for 12AU7
  160. ccs, direct coupling and stuff
  161. Replica Pre QUAD 22 - Questions on mids
  162. Is this cap ok for audio?
  163. Remote Controlled Stepped Attenuator
  164. UltraLinear in toroidal parafeed, my findings.
  165. Help to tame a 12AX7/6AQ5 circuit
  166. DIY something like iMPAMP??
  167. Have you seen this tester?
  168. Help with taming a 12AX7 and 6AQ5a amp
  169. Linear Technology 1083CP adjusting problem
  170. radiation tubes
  171. 813 socket dimensions
  172. Cheap SE output transformers
  173. BIAS and B+ caps WKZ or NH
  174. Cleaning tubes...
  175. Manfred Huber
  176. IEC standards, anywhere?
  177. possible volume and balance control - does this look like it will work well?
  178. EL84 Amp - Baby Huey
  179. 6X4
  180. What do you guys use for HV toggles?
  181. Balanced Operation Output Transformer Questions from N00b
  182. Static stain cleaning
  183. 12AX7 preamp project
  184. SE 1.5W OTL
  185. Cross-coupled NFB for PP Pentode
  186. Parallel triodes - CONS?
  187. output transformer spec questions
  188. Choosing Valve
  189. opinions wanted - Lafayette Stereo 224 Tube Amp
  190. New KT77 Tubes by JJ
  191. 60HL5?
  192. Standby switch
  193. Problems With Simple Gounded Cathode Gain Stage
  194. srpp 6c33c
  195. Mullard 5-20/Maplin 4-20 modification to NON-Ultra Linear mode????
  196. Anyone in gta know their tubes?
  197. 801 low power SE amp
  198. superalloy ( 78% nickel/2%cobalt) EI-66 with Furukawa ultimate wire.
  199. OPT resistance for EL84 PP Class A
  200. What’s in this amplifier?
  201. Whose logo?
  202. pentode phase splitter
  203. Is this EL84M UL PP OK?
  204. Tube preamp question...also, chassis layout
  205. Quad II Mods/Tweeks
  206. Trying to recreate a Fisher SA-16
  207. CCS, how it actually works?
  208. 400V CRC PS, what do I do with it?
  209. Does anyone has MILBERT BAM230 TUBE CAR POWER AMPLIFIER
  210. Valve sockets
  211. Can I use 12AT7?
  212. Music Reference RM5 mkIII
  213. Help: Sun Audio Kits where from? EIFL, ELEX, Sun Audio?
  214. Looking for a link on power supply design
  215. Is feedback required for UL EL84PP?
  216. Someone working on an insane tube project?
  217. Load line frustration
  218. Is 12B4/A good for differential pair?
  219. Heretical Unity Gain line stage PLUS a little gain ?
  220. tube vibration
  221. Small temp voltage on phono input-problem?
  222. What's it all about?
  223. IXYS GaAs Schottky Diodes.
  224. Maplin 4-20
  225. Line preamp using 2 ECC88 per channel
  226. What to use as a nice amp case?
  227. Signal Tube Longevity ?!?
  228. HK 250 power amp tube amp schematic
  229. Need help with connecting OPT.
  230. 6SL7 driving SE EL34 ?
  231. power supply tranny
  232. Output Transformer Background
  233. Schematic
  234. £¸£´£µ no dc passing the opt
  235. New preamp schematics
  236. Transformer ID & Specs Sheet Help
  237. I Know Some Tube Flavors Are Worth More Than Others...
  238. Why hybrid CCS?
  239. Alembic F-2B
  240. Best cap to cathode tube bypass is …..
  241. Cheap el84 se
  242. Bridge rectifier with capacitors???
  243. 4 volt (dc?) heater from 6.3v
  244. Does anyone recognise this valve amp
  245. PS Capacitor Voltage Rating
  246. Which 6SN7 preamp should I build?
  247. Help on upgrading my Tube Preamp
  248. looking for a non-copyrighted preamp schematic
  249. Problems with cathodyne
  250. more gain needed -> how?

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