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  1. Why separate AC heater supplies for driver and power tubes?
  2. Using one half of double triode
  3. huh ?
  4. holy cow, this sounds nice
  5. my SY CCS is only giving me 15mA
  6. Changing filter cap in HH Scott
  7. Why Class AB is bad
  8. Problem, please help !!!!!!
  9. Eico hf-30 reworking
  10. KT88 Bias Adjustment
  11. Interstage Distortion Measurements
  12. Survey: Aikido distortion
  13. Loftin-White Mod
  14. Music Angel EL34
  15. How much filtering required for DC heaters?
  16. What is the best input/driver for 2A3 SE?
  17. tube kits....
  18. !2ax7 heater wiring? Series / parallel?
  19. Shunt regulator
  20. Trying to choose a project...
  21. Old Projector amp conversion project
  22. Experiences with TJ Mesh Plate DHT's
  23. The lost Millman Seely chapters on audio amps
  24. Individual fixed bias and transf coupling
  25. Transmitter e-tour
  26. 7984
  27. Screen driven EL36 / 6CM5 /PL36 /25E5
  28. Clone Marantz 7C power supply
  29. On - board supply ?
  30. Name that EL34!
  31. How much plate voltage for 6N1P's?
  32. minimalist valve pre for follower
  33. Schematic opinion needed (guitar amp)
  34. Tube availability: what would you do?
  35. Silvertone 1472 Makeover
  36. Looking for EL32 schematic
  37. oil bath cooling for tubes?
  38. Aikido Crackle Hiss Noise Solved
  39. Mini-p1 tweaks
  40. Refried Power Supply?
  41. The Edcor meets the 6AV5
  42. old console radio as guitar amp
  43. Anyone have curves for a 5HC7?
  44. Any common cathode (grounded grid) schematics?
  45. SIMPLE tube amplifier for...dummy guy...
  46. ground and earth
  47. Tube Cad Journal dead
  48. First amp
  49. 6922 direct coupled to 2A3
  50. Ok guys, get your daggers out.......
  51. How would you build a hybrid LM3xxx amp?
  52. Tade no tube amp!
  53. Sherwood 5500
  54. Most accurate way of matching triodes ?
  55. Help Identify This AMP!
  56. Old Tube Equipment Turnon
  57. Current Sourced Cathode Follower
  58. Tube Tester Data
  59. noob pre/pwer amp recording ?s
  60. Anyone heard of "in-rush" limiter resistor
  61. Will adding a 10H/125mA choke hurt bass performance
  62. Fixed bias vs. auto bias
  63. Not your average output transformer problem
  64. Balanced Audio Technology VK 3i preamplifier
  65. Musical Fidelity X10-D - changing tubes problem
  66. power transformers in series
  67. Loud sudden rumbling when turn on amp
  68. Help with tube amplification?
  69. UTC CG-431 Terminal Arrangement
  70. Mingda MC34B tweaks
  71. Symphonic Line Die Erleuchtung Reference
  72. 6SL7 Diffamp front end
  73. PT/OPT Orientation questions
  74. Effect of using 50k pot instead of 100k pot in tube preamp?
  75. Using the Crowhurst articles and Claus Byrith
  76. 12SX7
  77. Bridge SE amplifier
  78. Cad Sw
  79. Kit amps in the UK
  80. ECC82 based preamp
  81. How important is the coupling cap?
  82. any pcb layout for marshall standard 50w valve amp ?
  83. pentode driven 300b set amp - any info?
  84. Circlotron Preamp with ECC88.
  85. Removing tone controls - Need a little help
  86. SE EL84 amplifier schematics
  87. Output coupling - Choke-coil method?
  88. 7788 tube mic preamp design
  89. Amperex 6085 Tube- Where to Buy?
  90. Can a 5687 drive four 813's in triode mode ?
  91. Schematics needed for Heathkit S33
  92. Tube Sparking
  93. Vacuum Tube Pre O.C.L.
  94. Why no single triode OTL power stages?
  95. 6922 .2 sections in parallel
  96. Pre-amp input remote control
  97. Any benefit to DC heater on parallel supply rectifier (GZ34)?
  98. Relpacing 6EU7s with 12AX7s - Good idea?
  99. These Valves good for anything?
  100. buzz problem
  101. Help with trafo
  102. Svetlana EL509 III tubes
  103. Noise on Aikido output
  104. Book “Single Ended Amplifiers” by John (not Gordon) Rankin
  105. EV4417 6CM5 (6x) P-P Amp Schematic
  106. Need recommendation for cathode bypass cap
  107. Simplest flea-powered amp?
  108. Decisions, Decisions - Help me select iron
  109. 966 mercury vapor rectifier
  110. Sound Practices CDs
  111. Question about DIY EL34PP amp
  112. noisy noisy noisy noisy noisy tube
  113. Help needed lowering B+ for DIY amp
  114. 6SN7 CCS
  115. Russian 6L6 family sketchy?
  116. HT regulator using 78xx
  117. Audio Research CA50
  118. Granite tiles
  119. SE Triode amp for a newbie
  120. tube is flashing and glowing very bright!
  121. Suggestions for another amplifier project.
  122. almost just another newbie thread...
  123. Bogen PA--->Guitar Amp, few questions
  124. ts9 pt9 triode
  125. help Etude 124BA keep blowing fuse.
  126. Metal 6L6s?
  127. Hybrid amplifier help...
  128. Tube input and mosfet output
  129. musical fidelity f22 schematic wanted
  130. An intriguing 300B SE-direct-coupled-amplifier
  131. Output capacitor
  132. Cascoded Long Tail Pair Inferno!
  133. Tube ornamental rim
  134. What should be mod first in my amp
  135. EL504/PL504 spice model
  136. Long Tail Pair Phase Inverter with Penthode ?
  137. new spice models available
  138. Output Capacitor Value
  139. Popular tube websites notifier
  140. Convergent Preamplifier Schematich
  141. Source of tubes & associated stuff in Sydney?
  142. Projects involving EF50 tubes?
  143. Kt77?
  144. Best way to translate schematic into actual layout?
  145. Clean to breakup range
  146. 26 preamp problem
  147. mono tube microphone preamp
  148. Help designing a tube amp...
  149. MJE350 pinout and ccs issue
  150. KGB- DC Coupled Hybrid Balance OTL/OCL HeadAmp
  151. negative voltage doubler for ccs
  152. Loftin-White
  153. SET amp from 1619 driving a 809. Opinion wanted.
  154. Re:preamp sputtering noise
  155. Building an ECL82 Single Ended Amp ...
  156. help a newbie build his first tube project
  157. Mercury Vapour rectifiers
  158. El Cheapo Circlotron PSU question....
  159. lookin for a tube buffer
  160. Baby SET w/6FD7 and ilk, for Bas and others....
  161. py500A question
  162. Mundorf Silver-oil VS Jensen copper foil
  163. Can you run a Fender Twin Reverb with only two 6L6's?
  164. Drawing Schematics for Tubes
  165. Drive Current for EL509 Enhanced Triode
  166. How to use Svetlana 6d22s?
  167. James Singapore
  168. Oil Filled Capacitor not upright OK?
  169. Aikido using a #26 tube?
  170. Tube and DIY Newbie Kel84 vs Stoetkit Jr.2
  171. ZOTL and ferrites
  172. 6V6 vs EL84 SE UL
  173. Speaker questions for a Silvertone 1472
  174. Component selection
  175. Snap sound on preamp powerup
  176. Secondary voltage for heaters
  177. good schematic archive site
  178. Transitional SIlvertoneAmp between 1472 and 1482?
  179. Cheap Source for Hammond 125ESE
  180. PCF801 - pentode section has remote or sharp cut-off?
  181. Tube as a desk lamp
  182. Ella EL34 Bias Help
  183. tube diy can or can t
  184. Quad II Problems
  185. Choke input P/supply and critical damping
  186. balanced grounded grid preamp
  187. Fluorescent ballasts in SE
  188. Hammond Transformers and EZ80/EZ81
  189. Look what I found this weekend!
  190. Question on 300B tubes from Parts Connexion
  191. Russian Tubes
  192. Help a first timer to select...
  193. GE 5692 BLACK base?
  194. sources on the web for chinese amps
  195. How much capacitance in a power supply
  196. Parallel 12AT7 for 2A3 driver?
  197. Maida's regulator
  198. Common Mode Chokes for Heater Supplies
  199. Ming Da MC34B....passive or active pre amp?
  200. tube power supply upgrade... elna's, RTX, infinicap
  201. What tube do you think this OPT matches?
  202. safety fuse
  203. Short and sweet review of Sun Audio SV-300BE
  204. Help selecting a DIY schematic
  205. OP Transformer power rating guesstimate
  206. need a lot help on an el34 project :P
  207. Anode Follower
  208. CCS for tubes/valves: PCBs
  209. Improvement to DM's Generic Triode Model for 12AU7
  210. ccs, direct coupling and stuff
  211. Replica Pre QUAD 22 - Questions on mids
  212. Is this cap ok for audio?
  213. Remote Controlled Stepped Attenuator
  214. UltraLinear in toroidal parafeed, my findings.
  215. Help to tame a 12AX7/6AQ5 circuit
  216. DIY something like iMPAMP??
  217. Have you seen this tester?
  218. Help with taming a 12AX7 and 6AQ5a amp
  219. Linear Technology 1083CP adjusting problem
  220. radiation tubes
  221. 813 socket dimensions
  222. Cheap SE output transformers
  223. BIAS and B+ caps WKZ or NH
  224. Cleaning tubes...
  225. Manfred Huber
  226. IEC standards, anywhere?
  227. possible volume and balance control - does this look like it will work well?
  228. EL84 Amp - Baby Huey
  229. 6X4
  230. What do you guys use for HV toggles?
  231. Balanced Operation Output Transformer Questions from N00b
  232. Static stain cleaning
  233. 12AX7 preamp project
  234. SE 1.5W OTL
  235. Cross-coupled NFB for PP Pentode
  236. Parallel triodes - CONS?
  237. output transformer spec questions
  238. Choosing Valve
  239. opinions wanted - Lafayette Stereo 224 Tube Amp
  240. New KT77 Tubes by JJ
  241. 60HL5?
  242. Standby switch
  243. Problems With Simple Gounded Cathode Gain Stage
  244. srpp 6c33c
  245. Mullard 5-20/Maplin 4-20 modification to NON-Ultra Linear mode????
  246. Anyone in gta know their tubes?
  247. 801 low power SE amp
  248. superalloy ( 78% nickel/2%cobalt) EI-66 with Furukawa ultimate wire.
  249. OPT resistance for EL84 PP Class A
  250. What’s in this amplifier?

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