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

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