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  1. 45 DHT HT Supply oscillating - help!
  2. exceeding plate voltage of the output tube
  3. Fisher 101D
  4. Tubes and Eagle3D
  5. Looking for old amp info
  6. Restoring an old tube amp
  7. Noob Tube Preamp Finished Kit Transformer HOT!
  8. the tv underrated tubes
  9. Headphone Amp
  10. What is needed to drive 86db speakers and sound *good*?
  11. ef86 - plate voltage
  12. Output signal distortion
  13. Minimum Acceptable Gm
  14. Anyone have experience with the 6SD7GT tube ?
  15. Identifying an ultralinear OPT
  16. A good sounding EL34 PP sch please
  17. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  18. ST-35 First Build
  19. Identifying EL34 tube?
  20. Solid state relais in stean of standby swtich
  21. $75 tube amp kit on eBay???
  22. Power supply RC (ohm's law) question -NEWBIE ALERT
  23. variable power control
  24. reccommend a voltage doubler for bias?
  25. Point to Point build tips
  26. I need some fairly specific capacitors types, like polyester or silva mica.
  27. ecf82 pentode instead of ef86
  28. K-12G vs. K-502
  29. eq in a tiny Directly Heated Cathode amp
  30. Anyone ever try 6C33C SE with Aikido drive?
  31. Help with 1:2 line level input Tx's
  32. 112a preamp need comment please
  33. Excellent (Modified) Williamson Treatise
  34. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  35. Chicago BO-14 100w amp
  36. ef861 - guitar preamp
  37. volume pot question, help.
  38. Simple B+ delay circuit for tube power amp?
  39. Dynacord Super 61, 62 spares request
  40. My small tube does it work?
  41. Approaching the best primary impedance on low or high side?
  42. CT Trafo and floating psu for circlotron?
  43. Unknown tube, need help to identify!
  44. 6L6 guidance needed
  45. Output Power Question
  46. Can the 7AK7 computer tube work as audio output tube ?
  47. Burned in Power Tubes?
  48. Driver Match for K-12G TubeAmp
  49. KT90 to KT88 with autobias
  50. SRPP DC working condition for Rk1=2Rk2
  51. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  52. the 'sound' of a CF
  53. Hickok I-177B tester help!
  54. Illinois Capacitor or Cornell_Dubilier
  55. Found iron recycling - what possible uses?
  56. Class AB PP - is it any good ?
  57. Stereo to mono by paralleling outputs?
  58. BOX in the making
  59. How about paralleling output tubes
  60. Are they basically Borbely hybrid circuitry?
  61. Service Life at Low Plate Current
  62. Sophia Electric SE Transformers for 813 "Super Schade"
  63. 10W suitcase amp
  64. PP OT made of 2 transformers
  65. If I change B+ do I have to change the circuit?
  66. PhonoDude
  67. Lafayette Phono/Reverb /Center channel amp
  68. Seller recommendation needed.
  69. Jeffrey's Super Circlotron (hybrid)
  70. Request for obscure heater specs
  71. Jolida JD1501RC Service Manual / Schematic
  72. 80W amp with a pair of EL34
  73. Epiphone Valve Junior to HiFi Conversion
  74. Serious Distortion on my DIY Toccata Phono Preamp
  75. Hickok 539b switch settings for 6SL7
  76. help me designing parallel SE guitar amp with 12at7 as power tube
  77. Voltage Change9115v/230v) of Audio Research amplifiers
  78. HF oscillation with no load, but only on one channel.
  79. Tube innards
  80. Peavey valveking 112 lead (distortion) channel doesn't work
  81. Looking for a tube amp
  82. What happens If I use too weak output transformer?
  83. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  84. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  85. Single Ended EL84 B+
  86. Looking for some PSU advice ...
  87. Electronic transformer filament supply
  88. Which Salas HV shunt regulator should I choose?
  89. Traced an old valve with no specs - thoughts please
  90. Resistor socket?
  91. Dynaco PAS 3X PSU mod
  92. Best sounding 500v. electrolytics
  93. CCS's for CCD line amp?
  94. tube life
  95. For tube amps w/ high output Z - Parallel R cross spkr?
  96. High and low impedance output preamps
  97. LTspice and simulating tube circuits?
  98. Cheap & Well Made Chinese SE EL34 Amp
  99. Heathkit transformer replacement...
  100. Integrated amp will not turn on
  101. EL34, Claus Byrith amplifier, mains noise problem
  102. Need a proposal for a stereo amp
  103. 12AT7 Headphone amp
  104. 6l6/12ax7 schematics please
  105. Hybrid bridge with jfet OS
  106. Please allow me to introduce myselft
  107. Chassis Source
  108. Is my 6L6 amp damaged from EL34's
  109. VISHAY VTA 55 Bulk Metal Foil Resistors?
  110. High-Voltage Power for 6 stage pedal
  111. 10 megaohms??
  112. E180F V EF184
  113. help on gain calculation with transformer for SE tube
  114. Working with constant current charts
  115. Hum and noise in small amp
  116. My project (6c33SET)
  117. EZ260A Grommes 260A Project
  118. 18A5 sound fine in triode mode ?
  119. 6GF5 sound fine in triode mode ?
  120. Muddy 6V6 Power Amp?
  121. GM 70 Schematic needed!
  122. tube simulatie models.
  123. building vacuum tubes... some questons
  124. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  125. Fixed bias on small signal pentode
  126. Buffer preamplifier
  127. 7027a testing
  128. decade bank values for a plate current tester
  129. anyone know the dimensions of a dynakit st-70 pcb?
  130. Help on designing full DHT SET power amplifier
  131. dc coupled volume pot value
  132. 20W OTL with 6N5P, Opinions...
  133. Finding parts
  134. Tube's JLH hybrid solution
  135. Curtis Mathes Console / TV receiver
  136. Marantz 8b feedback circuit
  137. Noisy volume pot with some tubes but not others
  138. Found an Eico HF-86 for sale, is it worth it?
  139. Paco T-60 Tube Tester
  140. Aikido all in one heater issue
  141. Need a little help with Chinese tube Preamp
  142. Choke Loaded Const. Current Draw Amp
  143. 6550 SINGLE-ENDED AMPLIFIER
  144. Balancing pp driver stage
  145. P-P 6C33
  146. Need help with Cornet 2
  147. Sweet folly: a tube SMPS
  148. More articles for the Wireless World Archive
  149. Recommendations for a valve amp kit
  150. 2 watt amplifier
  151. 1AX7
  152. 2 x 6as7 -> u=?
  153. Help with transformer
  154. Building a mu-follower stage
  155. ecl11 - ecl86 replacement
  156. Please comment on this grounding scheme.
  157. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  158. Microphone modification help
  159. Microphone modification help
  160. First time hearing an SET
  161. Rattle can a power transformer
  162. Need better RIAA circuit for my phono amp.
  163. Input volume pot wiring
  164. Constant current heating undervoltage
  165. Some tube info that I hope is helpful
  166. Toroidal output transormers
  167. cathode bypass on opt secondary
  168. Push Pull Powersupply Test Question?
  169. Recommandation please..
  170. My new humble thread
  171. KT88 single stage pp - cascode diff amp
  172. foot switch safety question
  173. Which KT88 Brand to Buy?Sso many to choose
  174. 12ax7 perfect bias point
  175. preamplifier/driver for 807
  176. Help with Quad II hum
  177. 18K audio note output transformer
  178. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  179. Hybrid never see
  180. "Next to Last" PAS Project
  181. Power supply overload
  182. Home build 6L6 pp amp buzzing noise
  183. 807 monoblocks with big PSU
  184. SET amps and crossovers.....?
  185. Sockets for 6P41S
  186. 6dj8 phono amp
  187. Jolida Score!!!!
  188. voltage boost
  189. Swinging choke value in PSUD
  190. Hum Nirvana
  191. Plates glowing on my Fender Concert after blowing fuse
  192. This weekend's reading
  193. 6550-6550A-6550B-6550C - What are exactly Differences ??
  194. Interstage Transformer Questions
  195. Vacuum State FVP5A voltages
  196. can you help me out? Sencore TC114 tube tester
  197. Steve Bench's tube crossover - Help needed.
  198. transformer design equations
  199. Retrofit idea, need advice, 6L6SE guitar amp
  200. some misc schematics, manley, rotel
  201. What happened to my tube??
  202. Tube Preamp Question
  203. Schematic for Pilot SP215
  204. Screen current through cathode resistors
  205. Gyrator design
  206. Any tips for routing heaters on a PCB
  207. 6EZ5 as drop in replacement for 6V6 tube?
  208. RIAA Preamp and equalization 12AX7
  209. Correct hum mods?
  210. Push-Pull from Stereo SE amp
  211. how to select transformers.
  212. Ultrapath or parallel feed apps. for 7591 amps?
  213. PP-UL amp with KT88
  214. Reuse these sockets and tube choice question
  215. Need help understanding this circuit
  216. Need a little help with a power supply I designed.
  217. Which tube Rectifier is good enough for 5902 tube amp ?
  218. Schematic for Masco ME-8?
  219. Transformer Rattle & Hum issue - Dynakit ST-70
  220. pio coupling caps - damaged/used?
  221. 6EZ8 (and other triple triodes) help please!
  222. Akron, Ohio
  223. 6N6P Heater and earth wiring advice
  224. united transformer corporation
  225. Capacitive v. Inductive inter-stage coupling
  226. unused secondaries on SE opt?
  227. Marco Rodint coil building info needed
  228. Scott 222B Hum
  229. how to make audio output transformer
  230. 5842 Anyone?
  231. 813 SE build
  232. Aikido LV improved psu
  233. My first HiFi project
  234. B&O 608 tube amplifier
  235. Just designed a 300b amplifier....
  236. Anyone used C3g to drive GM70?
  237. Capacitors found, have you used these?
  238. I need your help!!!!!
  239. 12au7 600 ohm output
  240. new C3g/211PSE comments pls
  241. anyone know of a source for 12 pin+ connectors?
  242. Dynaco Mark IV Power Resistor
  243. Moondog with ac on gain & driver tubes?
  244. need help again on DIY Toccata MC Phono preamp
  245. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  246. newbie needs help with tube inheritance
  247. 2A3 SETs with Edcor Iron
  248. What to do with this iron (originally from PP 7355)
  249. Just for everyone's amusement....
  250. beam tetrode calculations

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