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  1. Solid state relais in stean of standby swtich
  2. $75 tube amp kit on eBay???
  3. Power supply RC (ohm's law) question -NEWBIE ALERT
  4. variable power control
  5. reccommend a voltage doubler for bias?
  6. Point to Point build tips
  7. I need some fairly specific capacitors types, like polyester or silva mica.
  8. ecf82 pentode instead of ef86
  9. K-12G vs. K-502
  10. eq in a tiny Directly Heated Cathode amp
  11. Anyone ever try 6C33C SE with Aikido drive?
  12. Help with 1:2 line level input Tx's
  13. 112a preamp need comment please
  14. Excellent (Modified) Williamson Treatise
  15. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  16. Chicago BO-14 100w amp
  17. ef861 - guitar preamp
  18. volume pot question, help.
  19. Simple B+ delay circuit for tube power amp?
  20. Dynacord Super 61, 62 spares request
  21. My small tube does it work?
  22. Approaching the best primary impedance on low or high side?
  23. CT Trafo and floating psu for circlotron?
  24. Unknown tube, need help to identify!
  25. 6L6 guidance needed
  26. Output Power Question
  27. Can the 7AK7 computer tube work as audio output tube ?
  28. Burned in Power Tubes?
  29. Driver Match for K-12G TubeAmp
  30. KT90 to KT88 with autobias
  31. SRPP DC working condition for Rk1=2Rk2
  32. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  33. the 'sound' of a CF
  34. Hickok I-177B tester help!
  35. Illinois Capacitor or Cornell_Dubilier
  36. Found iron recycling - what possible uses?
  37. Class AB PP - is it any good ?
  38. Stereo to mono by paralleling outputs?
  39. BOX in the making
  40. How about paralleling output tubes
  41. Are they basically Borbely hybrid circuitry?
  42. Service Life at Low Plate Current
  43. Sophia Electric SE Transformers for 813 "Super Schade"
  44. 10W suitcase amp
  45. PP OT made of 2 transformers
  46. If I change B+ do I have to change the circuit?
  47. PhonoDude
  48. Lafayette Phono/Reverb /Center channel amp
  49. Seller recommendation needed.
  50. Jeffrey's Super Circlotron (hybrid)
  51. Request for obscure heater specs
  52. Jolida JD1501RC Service Manual / Schematic
  53. 80W amp with a pair of EL34
  54. Epiphone Valve Junior to HiFi Conversion
  55. Serious Distortion on my DIY Toccata Phono Preamp
  56. Hickok 539b switch settings for 6SL7
  57. help me designing parallel SE guitar amp with 12at7 as power tube
  58. Voltage Change9115v/230v) of Audio Research amplifiers
  59. HF oscillation with no load, but only on one channel.
  60. Tube innards
  61. Peavey valveking 112 lead (distortion) channel doesn't work
  62. Looking for a tube amp
  63. What happens If I use too weak output transformer?
  64. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  65. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  66. Single Ended EL84 B+
  67. Looking for some PSU advice ...
  68. Electronic transformer filament supply
  69. Which Salas HV shunt regulator should I choose?
  70. Traced an old valve with no specs - thoughts please
  71. Resistor socket?
  72. Dynaco PAS 3X PSU mod
  73. Best sounding 500v. electrolytics
  74. CCS's for CCD line amp?
  75. tube life
  76. For tube amps w/ high output Z - Parallel R cross spkr?
  77. High and low impedance output preamps
  78. LTspice and simulating tube circuits?
  79. Cheap & Well Made Chinese SE EL34 Amp
  80. Heathkit transformer replacement...
  81. Integrated amp will not turn on
  82. EL34, Claus Byrith amplifier, mains noise problem
  83. Need a proposal for a stereo amp
  84. 12AT7 Headphone amp
  85. 6l6/12ax7 schematics please
  86. Hybrid bridge with jfet OS
  87. Please allow me to introduce myselft
  88. Chassis Source
  89. Is my 6L6 amp damaged from EL34's
  90. VISHAY VTA 55 Bulk Metal Foil Resistors?
  91. High-Voltage Power for 6 stage pedal
  92. 10 megaohms??
  93. E180F V EF184
  94. help on gain calculation with transformer for SE tube
  95. Working with constant current charts
  96. Hum and noise in small amp
  97. My project (6c33SET)
  98. EZ260A Grommes 260A Project
  99. 18A5 sound fine in triode mode ?
  100. 6GF5 sound fine in triode mode ?
  101. Muddy 6V6 Power Amp?
  102. GM 70 Schematic needed!
  103. tube simulatie models.
  104. building vacuum tubes... some questons
  105. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  106. Fixed bias on small signal pentode
  107. Buffer preamplifier
  108. 7027a testing
  109. decade bank values for a plate current tester
  110. anyone know the dimensions of a dynakit st-70 pcb?
  111. Help on designing full DHT SET power amplifier
  112. dc coupled volume pot value
  113. 20W OTL with 6N5P, Opinions...
  114. Finding parts
  115. Tube's JLH hybrid solution
  116. Curtis Mathes Console / TV receiver
  117. Marantz 8b feedback circuit
  118. Noisy volume pot with some tubes but not others
  119. Found an Eico HF-86 for sale, is it worth it?
  120. Paco T-60 Tube Tester
  121. Aikido all in one heater issue
  122. Need a little help with Chinese tube Preamp
  123. Choke Loaded Const. Current Draw Amp
  124. 6550 SINGLE-ENDED AMPLIFIER
  125. Balancing pp driver stage
  126. P-P 6C33
  127. Need help with Cornet 2
  128. Sweet folly: a tube SMPS
  129. More articles for the Wireless World Archive
  130. Recommendations for a valve amp kit
  131. 2 watt amplifier
  132. 1AX7
  133. 2 x 6as7 -> u=?
  134. Help with transformer
  135. Building a mu-follower stage
  136. ecl11 - ecl86 replacement
  137. Please comment on this grounding scheme.
  138. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  139. Microphone modification help
  140. Microphone modification help
  141. First time hearing an SET
  142. Rattle can a power transformer
  143. Need better RIAA circuit for my phono amp.
  144. Input volume pot wiring
  145. Constant current heating undervoltage
  146. Some tube info that I hope is helpful
  147. Toroidal output transormers
  148. cathode bypass on opt secondary
  149. Push Pull Powersupply Test Question?
  150. Recommandation please..
  151. My new humble thread
  152. KT88 single stage pp - cascode diff amp
  153. foot switch safety question
  154. Which KT88 Brand to Buy?Sso many to choose
  155. 12ax7 perfect bias point
  156. preamplifier/driver for 807
  157. Help with Quad II hum
  158. 18K audio note output transformer
  159. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  160. Hybrid never see
  161. "Next to Last" PAS Project
  162. Power supply overload
  163. Home build 6L6 pp amp buzzing noise
  164. 807 monoblocks with big PSU
  165. SET amps and crossovers.....?
  166. Sockets for 6P41S
  167. 6dj8 phono amp
  168. Jolida Score!!!!
  169. voltage boost
  170. Swinging choke value in PSUD
  171. Hum Nirvana
  172. Plates glowing on my Fender Concert after blowing fuse
  173. This weekend's reading
  174. 6550-6550A-6550B-6550C - What are exactly Differences ??
  175. Interstage Transformer Questions
  176. Vacuum State FVP5A voltages
  177. can you help me out? Sencore TC114 tube tester
  178. Steve Bench's tube crossover - Help needed.
  179. transformer design equations
  180. Retrofit idea, need advice, 6L6SE guitar amp
  181. some misc schematics, manley, rotel
  182. What happened to my tube??
  183. Tube Preamp Question
  184. Schematic for Pilot SP215
  185. Screen current through cathode resistors
  186. Gyrator design
  187. Any tips for routing heaters on a PCB
  188. 6EZ5 as drop in replacement for 6V6 tube?
  189. RIAA Preamp and equalization 12AX7
  190. Correct hum mods?
  191. Push-Pull from Stereo SE amp
  192. how to select transformers.
  193. Ultrapath or parallel feed apps. for 7591 amps?
  194. PP-UL amp with KT88
  195. Reuse these sockets and tube choice question
  196. Need help understanding this circuit
  197. Need a little help with a power supply I designed.
  198. Which tube Rectifier is good enough for 5902 tube amp ?
  199. Schematic for Masco ME-8?
  200. Transformer Rattle & Hum issue - Dynakit ST-70
  201. pio coupling caps - damaged/used?
  202. 6EZ8 (and other triple triodes) help please!
  203. Akron, Ohio
  204. 6N6P Heater and earth wiring advice
  205. united transformer corporation
  206. Capacitive v. Inductive inter-stage coupling
  207. unused secondaries on SE opt?
  208. Marco Rodint coil building info needed
  209. Scott 222B Hum
  210. how to make audio output transformer
  211. 5842 Anyone?
  212. 813 SE build
  213. Aikido LV improved psu
  214. My first HiFi project
  215. B&O 608 tube amplifier
  216. Just designed a 300b amplifier....
  217. Anyone used C3g to drive GM70?
  218. Capacitors found, have you used these?
  219. I need your help!!!!!
  220. 12au7 600 ohm output
  221. new C3g/211PSE comments pls
  222. anyone know of a source for 12 pin+ connectors?
  223. Dynaco Mark IV Power Resistor
  224. Moondog with ac on gain & driver tubes?
  225. need help again on DIY Toccata MC Phono preamp
  226. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  227. newbie needs help with tube inheritance
  228. 2A3 SETs with Edcor Iron
  229. What to do with this iron (originally from PP 7355)
  230. Just for everyone's amusement....
  231. beam tetrode calculations
  232. What are the differences between LC and CLC chokes
  233. gain and mid circuits
  234. Kay 503 Schematics?
  235. Transformer Data
  236. tube B 406 triode dick's cleo 4
  237. GE Snubber, High Current DC, and Switching Capacitors
  238. Russian EL84 - Many varieties
  239. Back From the Dead- A NOS Tube Story
  240. application for ccs/gyrator board from the groupbuy
  241. Building a tube radio
  242. Three more articles for the WW Archive
  243. Amplifier antics
  244. what about a tube makes it UL recommended
  245. 6as7 p-p with transformer phase-splitter
  246. Large power push pull output transformers, say 150W
  247. I need a schematic for a amp project
  248. Preamp resistors calculation for http://www.shine7.com
  249. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  250. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier

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