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  1. Help Identify This AMP!
  2. Old Tube Equipment Turnon
  3. Current Sourced Cathode Follower
  4. noob pre/pwer amp recording ?s
  5. Anyone heard of "in-rush" limiter resistor
  6. Will adding a 10H/125mA choke hurt bass performance
  7. Fixed bias vs. auto bias
  8. Not your average output transformer problem
  9. Balanced Audio Technology VK 3i preamplifier
  10. Musical Fidelity X10-D - changing tubes problem
  11. power transformers in series
  12. Loud sudden rumbling when turn on amp
  13. Help with tube amplification?
  14. UTC CG-431 Terminal Arrangement
  15. Mingda MC34B tweaks
  16. Symphonic Line Die Erleuchtung Reference
  17. 6SL7 Diffamp front end
  18. PT/OPT Orientation questions
  19. Effect of using 50k pot instead of 100k pot in tube preamp?
  20. Using the Crowhurst articles and Claus Byrith
  21. 12SX7
  22. Bridge SE amplifier
  23. Cad Sw
  24. Kit amps in the UK
  25. ECC82 based preamp
  26. How important is the coupling cap?
  27. pentode driven 300b set amp - any info?
  28. Circlotron Preamp with ECC88.
  29. Removing tone controls - Need a little help
  30. SE EL84 amplifier schematics
  31. Output coupling - Choke-coil method?
  32. 7788 tube mic preamp design
  33. Amperex 6085 Tube- Where to Buy?
  34. Can a 5687 drive four 813's in triode mode ?
  35. Schematics needed for Heathkit S33
  36. Tube Sparking
  37. Vacuum Tube Pre O.C.L.
  38. Why no single triode OTL power stages?
  39. 6922 .2 sections in parallel
  40. Pre-amp input remote control
  41. Any benefit to DC heater on parallel supply rectifier (GZ34)?
  42. Relpacing 6EU7s with 12AX7s - Good idea?
  43. These Valves good for anything?
  44. buzz problem
  45. Help with trafo
  46. Svetlana EL509 III tubes
  47. Noise on Aikido output
  48. Book “Single Ended Amplifiers” by John (not Gordon) Rankin
  49. EV4417 6CM5 (6x) P-P Amp Schematic
  50. Need recommendation for cathode bypass cap
  51. Simplest flea-powered amp?
  52. Decisions, Decisions - Help me select iron
  53. 966 mercury vapor rectifier
  54. Sound Practices CDs
  55. Question about DIY EL34PP amp
  56. noisy noisy noisy noisy noisy tube
  57. Help needed lowering B+ for DIY amp
  58. 6SN7 CCS
  59. Russian 6L6 family sketchy?
  60. HT regulator using 78xx
  61. Audio Research CA50
  62. Granite tiles
  63. SE Triode amp for a newbie
  64. tube is flashing and glowing very bright!
  65. Suggestions for another amplifier project.
  66. almost just another newbie thread...
  67. ts9 pt9 triode
  68. help Etude 124BA keep blowing fuse.
  69. Metal 6L6s?
  70. Hybrid amplifier help...
  71. Tube input and mosfet output
  72. musical fidelity f22 schematic wanted
  73. An intriguing 300B SE-direct-coupled-amplifier
  74. Output capacitor
  75. Cascoded Long Tail Pair Inferno!
  76. Tube ornamental rim
  77. What should be mod first in my amp
  78. EL504/PL504 spice model
  79. Long Tail Pair Phase Inverter with Penthode ?
  80. new spice models available
  81. Output Capacitor Value
  82. Popular tube websites notifier
  83. Convergent Preamplifier Schematich
  84. Source of tubes & associated stuff in Sydney?
  85. Projects involving EF50 tubes?
  86. Kt77?
  87. Best way to translate schematic into actual layout?
  88. Clean to breakup range
  89. 26 preamp problem
  90. mono tube microphone preamp
  91. Help designing a tube amp...
  92. MJE350 pinout and ccs issue
  93. KGB- DC Coupled Hybrid Balance OTL/OCL HeadAmp
  94. negative voltage doubler for ccs
  95. Loftin-White
  96. SET amp from 1619 driving a 809. Opinion wanted.
  97. Re:preamp sputtering noise
  98. Building an ECL82 Single Ended Amp ...
  99. help a newbie build his first tube project
  100. Mercury Vapour rectifiers
  101. El Cheapo Circlotron PSU question....
  102. lookin for a tube buffer
  103. Baby SET w/6FD7 and ilk, for Bas and others....
  104. py500A question
  105. Mundorf Silver-oil VS Jensen copper foil
  106. Drawing Schematics for Tubes
  107. Drive Current for EL509 Enhanced Triode
  108. How to use Svetlana 6d22s?
  109. James Singapore
  110. Aikido using a #26 tube?
  111. Tube and DIY Newbie Kel84 vs Stoetkit Jr.2
  112. ZOTL and ferrites
  113. 6V6 vs EL84 SE UL
  114. Component selection
  115. Snap sound on preamp powerup
  116. Secondary voltage for heaters
  117. good schematic archive site
  118. Transitional SIlvertoneAmp between 1472 and 1482?
  119. Cheap Source for Hammond 125ESE
  120. PCF801 - pentode section has remote or sharp cut-off?
  121. Tube as a desk lamp
  122. Ella EL34 Bias Help
  123. tube diy can or can t
  124. Quad II Problems
  125. Choke input P/supply and critical damping
  126. balanced grounded grid preamp
  127. Fluorescent ballasts in SE
  128. Hammond Transformers and EZ80/EZ81
  129. Look what I found this weekend!
  130. Question on 300B tubes from Parts Connexion
  131. Russian Tubes
  132. Help a first timer to select...
  133. GE 5692 BLACK base?
  134. sources on the web for chinese amps
  135. How much capacitance in a power supply
  136. Parallel 12AT7 for 2A3 driver?
  137. Maida's regulator
  138. Common Mode Chokes for Heater Supplies
  139. Ming Da MC34B....passive or active pre amp?
  140. tube power supply upgrade... elna's, RTX, infinicap
  141. What tube do you think this OPT matches?
  142. safety fuse
  143. Short and sweet review of Sun Audio SV-300BE
  144. Help selecting a DIY schematic
  145. OP Transformer power rating guesstimate
  146. need a lot help on an el34 project :P
  147. Anode Follower
  148. CCS for tubes/valves: PCBs
  149. Improvement to DM's Generic Triode Model for 12AU7
  150. ccs, direct coupling and stuff
  151. Replica Pre QUAD 22 - Questions on mids
  152. Is this cap ok for audio?
  153. Remote Controlled Stepped Attenuator
  154. UltraLinear in toroidal parafeed, my findings.
  155. Help to tame a 12AX7/6AQ5 circuit
  156. DIY something like iMPAMP??
  157. Have you seen this tester?
  158. Help with taming a 12AX7 and 6AQ5a amp
  159. Linear Technology 1083CP adjusting problem
  160. radiation tubes
  161. 813 socket dimensions
  162. Cheap SE output transformers
  163. BIAS and B+ caps WKZ or NH
  164. Cleaning tubes...
  165. Manfred Huber
  166. IEC standards, anywhere?
  167. possible volume and balance control - does this look like it will work well?
  168. EL84 Amp - Baby Huey
  169. 6X4
  170. What do you guys use for HV toggles?
  171. Balanced Operation Output Transformer Questions from N00b
  172. Static stain cleaning
  173. 12AX7 preamp project
  174. SE 1.5W OTL
  175. Cross-coupled NFB for PP Pentode
  176. Parallel triodes - CONS?
  177. output transformer spec questions
  178. Choosing Valve
  179. opinions wanted - Lafayette Stereo 224 Tube Amp
  180. New KT77 Tubes by JJ
  181. 60HL5?
  182. Standby switch
  183. Problems With Simple Gounded Cathode Gain Stage
  184. srpp 6c33c
  185. Mullard 5-20/Maplin 4-20 modification to NON-Ultra Linear mode????
  186. Anyone in gta know their tubes?
  187. 801 low power SE amp
  188. superalloy ( 78% nickel/2%cobalt) EI-66 with Furukawa ultimate wire.
  189. OPT resistance for EL84 PP Class A
  190. What’s in this amplifier?
  191. Whose logo?
  192. pentode phase splitter
  193. Is this EL84M UL PP OK?
  194. Tube preamp question...also, chassis layout
  195. Quad II Mods/Tweeks
  196. Trying to recreate a Fisher SA-16
  197. CCS, how it actually works?
  198. 400V CRC PS, what do I do with it?
  199. Does anyone has Milbert BAM230 tube car power amplifier
  200. Valve sockets
  201. Can I use 12AT7?
  202. Music Reference RM5 mkIII
  203. Help: Sun Audio Kits where from? EIFL, ELEX, Sun Audio?
  204. Looking for a link on power supply design
  205. Is feedback required for UL EL84PP?
  206. Someone working on an insane tube project?
  207. Load line frustration
  208. Is 12B4/A good for differential pair?
  209. Heretical Unity Gain line stage PLUS a little gain ?
  210. tube vibration
  211. Small temp voltage on phono input-problem?
  212. What's it all about?
  213. IXYS GaAs Schottky Diodes.
  214. Maplin 4-20
  215. Line preamp using 2 ECC88 per channel
  216. What to use as a nice amp case?
  217. Signal Tube Longevity ?!?
  218. HK 250 power amp tube amp schematic
  219. Need help with connecting OPT.
  220. 6SL7 driving SE EL34 ?
  221. power supply tranny
  222. Output Transformer Background
  223. Schematic
  224. £¸£´£µ no dc passing the opt
  225. New preamp schematics
  226. Transformer ID & Specs Sheet Help
  227. I Know Some Tube Flavors Are Worth More Than Others...
  228. Why hybrid CCS?
  229. Best cap to cathode tube bypass is …..
  230. Cheap el84 se
  231. Bridge rectifier with capacitors???
  232. 4 volt (dc?) heater from 6.3v
  233. Does anyone recognise this valve amp
  234. Which 6SN7 preamp should I build?
  235. Help on upgrading my Tube Preamp
  236. looking for a non-copyrighted preamp schematic
  237. Problems with cathodyne
  238. more gain needed -> how?
  239. OT: Tribute to Kondo-San
  240. PCL82 SE Tube Amplifier Kit
  241. Rectifier voltage difference, Why?
  242. partial feedback stuff
  243. replace 5y3
  244. Sparking Tubes!
  245. Transformer End Bells
  246. DHT Ultrapath Linestage schematic help
  247. Who manufactured are these EL34's?
  248. Tubes and RoHS compliance?
  249. What do you think about this tube preamp?
  250. What's Ra?

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