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