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  1. My small tube does it work?
  2. Approaching the best primary impedance on low or high side?
  3. CT Trafo and floating psu for circlotron?
  4. Unknown tube, need help to identify!
  5. 6L6 guidance needed
  6. Output Power Question
  7. Can the 7AK7 computer tube work as audio output tube ?
  8. Burned in Power Tubes?
  9. Driver Match for K-12G TubeAmp
  10. KT90 to KT88 with autobias
  11. SRPP DC working condition for Rk1=2Rk2
  12. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  13. the 'sound' of a CF
  14. Hickok I-177B tester help!
  15. Illinois Capacitor or Cornell_Dubilier
  16. Found iron recycling - what possible uses?
  17. Class AB PP - is it any good ?
  18. Stereo to mono by paralleling outputs?
  19. BOX in the making
  20. How about paralleling output tubes
  21. Are they basically Borbely hybrid circuitry?
  22. Service Life at Low Plate Current
  23. Sophia Electric SE Transformers for 813 "Super Schade"
  24. 10W suitcase amp
  25. PP OT made of 2 transformers
  26. If I change B+ do I have to change the circuit?
  27. PhonoDude
  28. Lafayette Phono/Reverb /Center channel amp
  29. Seller recommendation needed.
  30. Jeffrey's Super Circlotron (hybrid)
  31. Request for obscure heater specs
  32. Jolida JD1501RC Service Manual / Schematic
  33. 80W amp with a pair of EL34
  34. Epiphone Valve Junior to HiFi Conversion
  35. Serious Distortion on my DIY Toccata Phono Preamp
  36. Hickok 539b switch settings for 6SL7
  37. help me designing parallel SE guitar amp with 12at7 as power tube
  38. Voltage Change9115v/230v) of Audio Research amplifiers
  39. HF oscillation with no load, but only on one channel.
  40. Tube innards
  41. Peavey valveking 112 lead (distortion) channel doesn't work
  42. Looking for a tube amp
  43. What happens If I use too weak output transformer?
  44. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  45. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  46. Single Ended EL84 B+
  47. Looking for some PSU advice ...
  48. Electronic transformer filament supply
  49. Which Salas HV shunt regulator should I choose?
  50. Traced an old valve with no specs - thoughts please
  51. Resistor socket?
  52. Dynaco PAS 3X PSU mod
  53. Best sounding 500v. electrolytics
  54. CCS's for CCD line amp?
  55. tube life
  56. For tube amps w/ high output Z - Parallel R cross spkr?
  57. High and low impedance output preamps
  58. LTspice and simulating tube circuits?
  59. Cheap & Well Made Chinese SE EL34 Amp
  60. Heathkit transformer replacement...
  61. Integrated amp will not turn on
  62. EL34, Claus Byrith amplifier, mains noise problem
  63. Need a proposal for a stereo amp
  64. 12AT7 Headphone amp
  65. 6l6/12ax7 schematics please
  66. Hybrid bridge with jfet OS
  67. Please allow me to introduce myselft
  68. Chassis Source
  69. Is my 6L6 amp damaged from EL34's
  70. VISHAY VTA 55 Bulk Metal Foil Resistors?
  71. High-Voltage Power for 6 stage pedal
  72. 10 megaohms??
  73. E180F V EF184
  74. help on gain calculation with transformer for SE tube
  75. Working with constant current charts
  76. Hum and noise in small amp
  77. My project (6c33SET)
  78. EZ260A Grommes 260A Project
  79. 18A5 sound fine in triode mode ?
  80. 6GF5 sound fine in triode mode ?
  81. Muddy 6V6 Power Amp?
  82. GM 70 Schematic needed!
  83. tube simulatie models.
  84. building vacuum tubes... some questons
  85. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  86. Fixed bias on small signal pentode
  87. Buffer preamplifier
  88. 7027a testing
  89. decade bank values for a plate current tester
  90. anyone know the dimensions of a dynakit st-70 pcb?
  91. Help on designing full DHT SET power amplifier
  92. dc coupled volume pot value
  93. 20W OTL with 6N5P, Opinions...
  94. Finding parts
  95. Tube's JLH hybrid solution
  96. Curtis Mathes Console / TV receiver
  97. Marantz 8b feedback circuit
  98. Noisy volume pot with some tubes but not others
  99. Found an Eico HF-86 for sale, is it worth it?
  100. Paco T-60 Tube Tester
  101. Aikido all in one heater issue
  102. Need a little help with Chinese tube Preamp
  103. Choke Loaded Const. Current Draw Amp
  104. 6550 SINGLE-ENDED AMPLIFIER
  105. Balancing pp driver stage
  106. P-P 6C33
  107. Need help with Cornet 2
  108. Sweet folly: a tube SMPS
  109. More articles for the Wireless World Archive
  110. Recommendations for a valve amp kit
  111. 2 watt amplifier
  112. 1AX7
  113. 2 x 6as7 -> u=?
  114. Help with transformer
  115. Building a mu-follower stage
  116. ecl11 - ecl86 replacement
  117. Please comment on this grounding scheme.
  118. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  119. Microphone modification help
  120. Microphone modification help
  121. First time hearing an SET
  122. Rattle can a power transformer
  123. Need better RIAA circuit for my phono amp.
  124. Input volume pot wiring
  125. Constant current heating undervoltage
  126. Some tube info that I hope is helpful
  127. Toroidal output transormers
  128. cathode bypass on opt secondary
  129. Push Pull Powersupply Test Question?
  130. Recommandation please..
  131. My new humble thread
  132. KT88 single stage pp - cascode diff amp
  133. foot switch safety question
  134. Which KT88 Brand to Buy?Sso many to choose
  135. 12ax7 perfect bias point
  136. preamplifier/driver for 807
  137. Help with Quad II hum
  138. 18K audio note output transformer
  139. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  140. Hybrid never see
  141. "Next to Last" PAS Project
  142. Power supply overload
  143. Home build 6L6 pp amp buzzing noise
  144. 807 monoblocks with big PSU
  145. SET amps and crossovers.....?
  146. Sockets for 6P41S
  147. 6dj8 phono amp
  148. Jolida Score!!!!
  149. voltage boost
  150. Swinging choke value in PSUD
  151. Hum Nirvana
  152. Plates glowing on my Fender Concert after blowing fuse
  153. This weekend's reading
  154. 6550-6550A-6550B-6550C - What are exactly Differences ??
  155. Interstage Transformer Questions
  156. Vacuum State FVP5A voltages
  157. can you help me out? Sencore TC114 tube tester
  158. Steve Bench's tube crossover - Help needed.
  159. transformer design equations
  160. Retrofit idea, need advice, 6L6SE guitar amp
  161. some misc schematics, manley, rotel
  162. What happened to my tube??
  163. Tube Preamp Question
  164. Schematic for Pilot SP215
  165. Screen current through cathode resistors
  166. Gyrator design
  167. Any tips for routing heaters on a PCB
  168. 6EZ5 as drop in replacement for 6V6 tube?
  169. RIAA Preamp and equalization 12AX7
  170. Correct hum mods?
  171. Push-Pull from Stereo SE amp
  172. how to select transformers.
  173. Ultrapath or parallel feed apps. for 7591 amps?
  174. PP-UL amp with KT88
  175. Reuse these sockets and tube choice question
  176. Need help understanding this circuit
  177. Need a little help with a power supply I designed.
  178. Which tube Rectifier is good enough for 5902 tube amp ?
  179. Schematic for Masco ME-8?
  180. Transformer Rattle & Hum issue - Dynakit ST-70
  181. pio coupling caps - damaged/used?
  182. 6EZ8 (and other triple triodes) help please!
  183. Akron, Ohio
  184. 6N6P Heater and earth wiring advice
  185. united transformer corporation
  186. Capacitive v. Inductive inter-stage coupling
  187. unused secondaries on SE opt?
  188. Marco Rodint coil building info needed
  189. Scott 222B Hum
  190. how to make audio output transformer
  191. 5842 Anyone?
  192. 813 SE build
  193. Aikido LV improved psu
  194. My first HiFi project
  195. B&O 608 tube amplifier
  196. Just designed a 300b amplifier....
  197. Anyone used C3g to drive GM70?
  198. Capacitors found, have you used these?
  199. I need your help!!!!!
  200. 12au7 600 ohm output
  201. new C3g/211PSE comments pls
  202. anyone know of a source for 12 pin+ connectors?
  203. Dynaco Mark IV Power Resistor
  204. Moondog with ac on gain & driver tubes?
  205. need help again on DIY Toccata MC Phono preamp
  206. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  207. newbie needs help with tube inheritance
  208. 2A3 SETs with Edcor Iron
  209. What to do with this iron (originally from PP 7355)
  210. Just for everyone's amusement....
  211. beam tetrode calculations
  212. What are the differences between LC and CLC chokes
  213. gain and mid circuits
  214. Kay 503 Schematics?
  215. Transformer Data
  216. tube B 406 triode dick's cleo 4
  217. GE Snubber, High Current DC, and Switching Capacitors
  218. Russian EL84 - Many varieties
  219. Back From the Dead- A NOS Tube Story
  220. application for ccs/gyrator board from the groupbuy
  221. Building a tube radio
  222. Three more articles for the WW Archive
  223. Amplifier antics
  224. what about a tube makes it UL recommended
  225. 6as7 p-p with transformer phase-splitter
  226. Large power push pull output transformers, say 150W
  227. I need a schematic for a amp project
  228. Preamp resistors calculation for http://www.shine7.com
  229. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  230. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier
  231. Vintage tubes
  232. Amp PSU standby and PA switching
  233. 245 tubes
  234. Vacuum tube clock radio
  235. First Project, need some help
  236. Graetz Scerzo Schematic
  237. simple se 2a3 amp help!!!!!
  238. 5bc3 rectifier
  239. Help me improve this PSU. (6c33 set, voltage doubler)
  240. Choke Loaded Driver Load Lines Question
  241. CCS and tube aging
  242. Tetra lives!!!!!
  243. Tube shops/supplies in Brisbane/Gold Coast
  244. AC VT25 filament?
  245. Let's show go on: Building Monster SE!
  246. Mystery 6AQ5A powered chassis?
  247. 6Y6G tube for low-voltage SE amplifier?
  248. Jolida gain and negative feedback?
  249. 1/2 of the tube for each channel?
  250. Problem with Legacy pentode driver stage

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