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  1. Jeffrey's Super Circlotron (hybrid)
  2. Request for obscure heater specs
  3. Jolida JD1501RC Service Manual / Schematic
  4. 80W amp with a pair of EL34
  5. Epiphone Valve Junior to HiFi Conversion
  6. Serious Distortion on my DIY Toccata Phono Preamp
  7. Voltage Change9115v/230v) of Audio Research amplifiers
  8. HF oscillation with no load, but only on one channel.
  9. Tube innards
  10. Looking for a tube amp
  11. What happens If I use too weak output transformer?
  12. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  13. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  14. Single Ended EL84 B+
  15. Looking for some PSU advice ...
  16. Electronic transformer filament supply
  17. Which Salas HV shunt regulator should I choose?
  18. Traced an old valve with no specs - thoughts please
  19. Dynaco PAS 3X PSU mod
  20. Best sounding 500v. electrolytics
  21. CCS's for CCD line amp?
  22. tube life
  23. For tube amps w/ high output Z - Parallel R cross spkr?
  24. High and low impedance output preamps
  25. Cheap & Well Made Chinese SE EL34 Amp
  26. Heathkit transformer replacement...
  27. Integrated amp will not turn on
  28. EL34, Claus Byrith amplifier, mains noise problem
  29. Need a proposal for a stereo amp
  30. 12AT7 Headphone amp
  31. 6l6/12ax7 schematics please
  32. Hybrid bridge with jfet OS
  33. Please allow me to introduce myselft
  34. Is my 6L6 amp damaged from EL34's
  35. High-Voltage Power for 6 stage pedal
  36. 10 megaohms??
  37. E180F V EF184
  38. help on gain calculation with transformer for SE tube
  39. Working with constant current charts
  40. Hum and noise in small amp
  41. My project (6c33SET)
  42. EZ260A Grommes 260A Project
  43. 18A5 sound fine in triode mode ?
  44. 6GF5 sound fine in triode mode ?
  45. Muddy 6V6 Power Amp?
  46. GM 70 Schematic needed!
  47. tube simulatie models.
  48. building vacuum tubes... some questons
  49. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  50. Fixed bias on small signal pentode
  51. Buffer preamplifier
  52. 7027a testing
  53. decade bank values for a plate current tester
  54. anyone know the dimensions of a dynakit st-70 pcb?
  55. Help on designing full DHT SET power amplifier
  56. dc coupled volume pot value
  57. 20W OTL with 6N5P, Opinions...
  58. Finding parts
  59. Tube's JLH hybrid solution
  60. Curtis Mathes Console / TV receiver
  61. Marantz 8b feedback circuit
  62. Noisy volume pot with some tubes but not others
  63. Found an Eico HF-86 for sale, is it worth it?
  64. Aikido all in one heater issue
  65. Need a little help with Chinese tube Preamp
  66. Choke Loaded Const. Current Draw Amp
  67. 6550 Single-Ended Amplifier
  68. Balancing pp driver stage
  69. P-P 6C33
  70. Need help with Cornet 2
  71. More articles for the Wireless World Archive
  72. Recommendations for a valve amp kit
  73. 2 watt amplifier
  74. 1AX7
  75. 2 x 6as7 -> u=?
  76. Help with transformer
  77. Building a mu-follower stage
  78. ecl11 - ecl86 replacement
  79. Please comment on this grounding scheme.
  80. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  81. Microphone modification help
  82. Microphone modification help
  83. First time hearing an SET
  84. Rattle can a power transformer
  85. Need better RIAA circuit for my phono amp.
  86. Input volume pot wiring
  87. Constant current heating undervoltage
  88. Some tube info that I hope is helpful
  89. Toroidal output transormers
  90. cathode bypass on opt secondary
  91. Push Pull Powersupply Test Question?
  92. Recommandation please..
  93. My new humble thread
  94. KT88 single stage pp - cascode diff amp
  95. foot switch safety question
  96. Which KT88 Brand to Buy?Sso many to choose
  97. 12ax7 perfect bias point
  98. preamplifier/driver for 807
  99. Help with Quad II hum
  100. 18K audio note output transformer
  101. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  102. Hybrid never see
  103. "Next to Last" PAS Project
  104. Power supply overload
  105. Home build 6L6 pp amp buzzing noise
  106. 807 monoblocks with big PSU
  107. SET amps and crossovers.....?
  108. Sockets for 6P41S
  109. 6dj8 phono amp
  110. Jolida Score!!!!
  111. voltage boost
  112. Swinging choke value in PSUD
  113. Hum Nirvana
  114. This weekend's reading
  115. 6550-6550A-6550B-6550C - What are exactly Differences ??
  116. Interstage Transformer Questions
  117. Vacuum State FVP5A voltages
  118. Steve Bench's tube crossover - Help needed.
  119. transformer design equations
  120. some misc schematics, manley, rotel
  121. What happened to my tube??
  122. Tube Preamp Question
  123. Schematic for Pilot SP215
  124. Screen current through cathode resistors
  125. Gyrator design
  126. Any tips for routing heaters on a PCB
  127. 6EZ5 as drop in replacement for 6V6 tube?
  128. RIAA Preamp and equalization 12AX7
  129. Correct hum mods?
  130. Push-Pull from Stereo SE amp
  131. how to select transformers.
  132. Ultrapath or parallel feed apps. for 7591 amps?
  133. PP-UL amp with KT88
  134. Reuse these sockets and tube choice question
  135. Need help understanding this circuit
  136. Need a little help with a power supply I designed.
  137. Which tube Rectifier is good enough for 5902 tube amp ?
  138. Schematic for Masco ME-8?
  139. Transformer Rattle & Hum issue - Dynakit ST-70
  140. 6EZ8 (and other triple triodes) help please!
  141. Akron, Ohio
  142. 6N6P Heater and earth wiring advice
  143. united transformer corporation
  144. Capacitive v. Inductive inter-stage coupling
  145. unused secondaries on SE opt?
  146. Marco Rodint coil building info needed
  147. Scott 222B Hum
  148. how to make audio output transformer
  149. 5842 Anyone?
  150. 813 SE build
  151. Aikido LV improved psu
  152. My first HiFi project
  153. B&O 608 tube amplifier
  154. Just designed a 300b amplifier....
  155. Anyone used C3g to drive GM70?
  156. I need your help!!!!!
  157. 12au7 600 ohm output
  158. new C3g/211PSE comments pls
  159. Dynaco Mark IV Power Resistor
  160. Moondog with ac on gain & driver tubes?
  161. need help again on DIY Toccata MC Phono preamp
  162. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  163. newbie needs help with tube inheritance
  164. 2A3 SETs with Edcor Iron
  165. What to do with this iron (originally from PP 7355)
  166. Just for everyone's amusement....
  167. beam tetrode calculations
  168. What are the differences between LC and CLC chokes
  169. gain and mid circuits
  170. Kay 503 Schematics?
  171. Transformer Data
  172. tube B 406 triode dick's cleo 4
  173. GE Snubber, High Current DC, and Switching Capacitors
  174. Russian EL84 - Many varieties
  175. Back From the Dead- A NOS Tube Story
  176. application for ccs/gyrator board from the groupbuy
  177. Building a tube radio
  178. Three more articles for the WW Archive
  179. Amplifier antics
  180. what about a tube makes it UL recommended
  181. 6as7 p-p with transformer phase-splitter
  182. Large power push pull output transformers, say 150W
  183. I need a schematic for a amp project
  184. Preamp resistors calculation for http://www.shine7.com
  185. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  186. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier
  187. Vintage tubes
  188. Amp PSU standby and PA switching
  189. 245 tubes
  190. Vacuum tube clock radio
  191. First Project, need some help
  192. Graetz Scerzo Schematic
  193. 5bc3 rectifier
  194. Help me improve this PSU. (6c33 set, voltage doubler)
  195. Choke Loaded Driver Load Lines Question
  196. CCS and tube aging
  197. Tetra lives!!!!!
  198. Tube shops/supplies in Brisbane/Gold Coast
  199. AC VT25 filament?
  200. Let's show go on: Building Monster SE!
  201. Mystery 6AQ5A powered chassis?
  202. 6Y6G tube for low-voltage SE amplifier?
  203. Jolida gain and negative feedback?
  204. 1/2 of the tube for each channel?
  205. Problem with Legacy pentode driver stage
  206. 845 Operating Point
  207. Tube rectifiers
  208. D76 Inrush current limiter thermistor?
  209. New to Tubes? How to get the basics, read on..
  210. interstage tansformer impedence
  211. 2 PSU sharing the same Power transformer?
  212. Biasing amp
  213. CCS placement
  214. clueless on console
  215. Popping in stepped volume control
  216. 6by5 CRC Values
  217. Is this do-able?
  218. PCB for Gary Pimm's CCS & SS Pentode
  219. EL86 Single Ended PP Power Amplifier
  220. Diyhifisupply Billies - dead OPTs?
  221. 6H30P-DR
  222. Tube AMP and stax headphones....
  223. soft start power supply for dynaco st-70
  224. The Telefunken EF86?
  225. Can you run parallel circuits from a rectifier?
  226. Mullard 5-20 with 6L6GC's?
  227. Adding balanced input to 6N1P tube.
  228. Partial feedback (anode grid) with cathode follower
  229. 4P1L as First gain stage or in Pre-Amp..?
  230. Advice on 6418 design requested
  231. Tube lineup in an Admiral y4302
  232. John Broskie MIA?
  233. Audio Research VT 100 MKII need help!!
  234. Help with AD30 PSU build
  235. Who was the Japanese Amp Guru?
  236. 6922 vs an ECC82.....a test.
  237. Triode connected 6LW6 for SE
  238. 12AD7???
  239. New Book Review
  240. Hoax or truth about 6SJ7 (Equiv.: 6J8P/5693/CV3699/VT-116A).. ???
  241. looking for hi volt commercial power supplies
  242. 6L6, 6L6GT, 6L6GC, 5881, 7027, KT66...
  243. ECC85
  244. Pioneer 304B fm/am reciever schematic
  245. ECC82 JJ Made in Slovak Republic!?
  246. Definition of matched
  247. pick tubes for tubecad unbalancer
  248. OPT for EL34
  249. 12v dc tube amp/pre high SQ
  250. Better than 12au7?

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