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  1. SRPP DC working condition for Rk1=2Rk2
  2. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  3. the 'sound' of a CF
  4. Hickok I-177B tester help!
  5. Illinois Capacitor or Cornell_Dubilier
  6. Found iron recycling - what possible uses?
  7. Class AB PP - is it any good ?
  8. Stereo to mono by paralleling outputs?
  9. BOX in the making
  10. How about paralleling output tubes
  11. Are they basically Borbely hybrid circuitry?
  12. Service Life at Low Plate Current
  13. Sophia Electric SE Transformers for 813 "Super Schade"
  14. 10W suitcase amp
  15. PP OT made of 2 transformers
  16. If I change B+ do I have to change the circuit?
  17. PhonoDude
  18. Lafayette Phono/Reverb /Center channel amp
  19. Seller recommendation needed.
  20. Jeffrey's Super Circlotron (hybrid)
  21. Request for obscure heater specs
  22. Jolida JD1501RC Service Manual / Schematic
  23. 80W amp with a pair of EL34
  24. Epiphone Valve Junior to HiFi Conversion
  25. Serious Distortion on my DIY Toccata Phono Preamp
  26. Hickok 539b switch settings for 6SL7
  27. help me designing parallel SE guitar amp with 12at7 as power tube
  28. Voltage Change9115v/230v) of Audio Research amplifiers
  29. HF oscillation with no load, but only on one channel.
  30. Tube innards
  31. Peavey valveking 112 lead (distortion) channel doesn't work
  32. Looking for a tube amp
  33. What happens If I use too weak output transformer?
  34. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  35. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  36. Single Ended EL84 B+
  37. Looking for some PSU advice ...
  38. Electronic transformer filament supply
  39. Which Salas HV shunt regulator should I choose?
  40. Traced an old valve with no specs - thoughts please
  41. Resistor socket?
  42. Dynaco PAS 3X PSU mod
  43. Vari-mu compressor question - Side chain
  44. Best sounding 500v. electrolytics
  45. CCS's for CCD line amp?
  46. tube life
  47. For tube amps w/ high output Z - Parallel R cross spkr?
  48. High and low impedance output preamps
  49. LTspice and simulating tube circuits?
  50. Cheap & Well Made Chinese SE EL34 Amp
  51. Heathkit transformer replacement...
  52. Integrated amp will not turn on
  53. EL34, Claus Byrith amplifier, mains noise problem
  54. Need a proposal for a stereo amp
  55. 12AT7 Headphone amp
  56. 6l6/12ax7 schematics please
  57. Hybrid bridge with jfet OS
  58. Please allow me to introduce myselft
  59. Chassis Source
  60. Is my 6L6 amp damaged from EL34's
  61. VISHAY VTA 55 Bulk Metal Foil Resistors?
  62. High-Voltage Power for 6 stage pedal
  63. 10 megaohms??
  64. E180F V EF184
  65. help on gain calculation with transformer for SE tube
  66. Working with constant current charts
  67. Hum and noise in small amp
  68. My project (6c33SET)
  69. EZ260A Grommes 260A Project
  70. 18A5 sound fine in triode mode ?
  71. 6GF5 sound fine in triode mode ?
  72. Muddy 6V6 Power Amp?
  73. GM 70 Schematic needed!
  74. tube simulatie models.
  75. building vacuum tubes... some questons
  76. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  77. Fixed bias on small signal pentode
  78. Buffer preamplifier
  79. 7027a testing
  80. decade bank values for a plate current tester
  81. anyone know the dimensions of a dynakit st-70 pcb?
  82. Help on designing full DHT SET power amplifier
  83. dc coupled volume pot value
  84. 20W OTL with 6N5P, Opinions...
  85. Finding parts
  86. Tube's JLH hybrid solution
  87. Curtis Mathes Console / TV receiver
  88. Marantz 8b feedback circuit
  89. Noisy volume pot with some tubes but not others
  90. Found an Eico HF-86 for sale, is it worth it?
  91. Paco T-60 Tube Tester
  92. Aikido all in one heater issue
  93. Need a little help with Chinese tube Preamp
  94. Choke Loaded Const. Current Draw Amp
  95. 6550 SINGLE-ENDED AMPLIFIER
  96. Balancing pp driver stage
  97. P-P 6C33
  98. Need help with Cornet 2
  99. Sweet folly: a tube SMPS
  100. More articles for the Wireless World Archive
  101. Recommendations for a valve amp kit
  102. 2 watt amplifier
  103. 1AX7
  104. 2 x 6as7 -> u=?
  105. Help with transformer
  106. Building a mu-follower stage
  107. ecl11 - ecl86 replacement
  108. Please comment on this grounding scheme.
  109. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  110. Microphone modification help
  111. Microphone modification help
  112. First time hearing an SET
  113. Rattle can a power transformer
  114. Need better RIAA circuit for my phono amp.
  115. Input volume pot wiring
  116. Constant current heating undervoltage
  117. Some tube info that I hope is helpful
  118. Toroidal output transormers
  119. cathode bypass on opt secondary
  120. Push Pull Powersupply Test Question?
  121. Recommandation please..
  122. My new humble thread
  123. KT88 single stage pp - cascode diff amp
  124. foot switch safety question
  125. Which KT88 Brand to Buy?Sso many to choose
  126. 12ax7 perfect bias point
  127. preamplifier/driver for 807
  128. Help with Quad II hum
  129. 18K audio note output transformer
  130. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  131. Hybrid never see
  132. "Next to Last" PAS Project
  133. Power supply overload
  134. Home build 6L6 pp amp buzzing noise
  135. 807 monoblocks with big PSU
  136. SET amps and crossovers.....?
  137. Sockets for 6P41S
  138. 6dj8 phono amp
  139. Jolida Score!!!!
  140. voltage boost
  141. Swinging choke value in PSUD
  142. Hum Nirvana
  143. Plates glowing on my Fender Concert after blowing fuse
  144. This weekend's reading
  145. 6550-6550A-6550B-6550C - What are exactly Differences ??
  146. Interstage Transformer Questions
  147. Vacuum State FVP5A voltages
  148. can you help me out? Sencore TC114 tube tester
  149. Steve Bench's tube crossover - Help needed.
  150. transformer design equations
  151. Retrofit idea, need advice, 6L6SE guitar amp
  152. some misc schematics, manley, rotel
  153. What happened to my tube??
  154. Tube Preamp Question
  155. Schematic for Pilot SP215
  156. Screen current through cathode resistors
  157. Gyrator design
  158. Any tips for routing heaters on a PCB
  159. 6EZ5 as drop in replacement for 6V6 tube?
  160. RIAA Preamp and equalization 12AX7
  161. Correct hum mods?
  162. Push-Pull from Stereo SE amp
  163. how to select transformers.
  164. Ultrapath or parallel feed apps. for 7591 amps?
  165. PP-UL amp with KT88
  166. Reuse these sockets and tube choice question
  167. Need help understanding this circuit
  168. Need a little help with a power supply I designed.
  169. Which tube Rectifier is good enough for 5902 tube amp ?
  170. Schematic for Masco ME-8?
  171. Transformer Rattle & Hum issue - Dynakit ST-70
  172. pio coupling caps - damaged/used?
  173. 6EZ8 (and other triple triodes) help please!
  174. Akron, Ohio
  175. 6N6P Heater and earth wiring advice
  176. united transformer corporation
  177. Capacitive v. Inductive inter-stage coupling
  178. unused secondaries on SE opt?
  179. Marco Rodint coil building info needed
  180. Scott 222B Hum
  181. how to make audio output transformer
  182. 5842 Anyone?
  183. 813 SE build
  184. Aikido LV improved psu
  185. My first HiFi project
  186. B&O 608 tube amplifier
  187. Just designed a 300b amplifier....
  188. Anyone used C3g to drive GM70?
  189. Capacitors found, have you used these?
  190. I need your help!!!!!
  191. 12au7 600 ohm output
  192. new C3g/211PSE comments pls
  193. anyone know of a source for 12 pin+ connectors?
  194. Dynaco Mark IV Power Resistor
  195. Moondog with ac on gain & driver tubes?
  196. need help again on DIY Toccata MC Phono preamp
  197. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  198. newbie needs help with tube inheritance
  199. 2A3 SETs with Edcor Iron
  200. What to do with this iron (originally from PP 7355)
  201. Just for everyone's amusement....
  202. beam tetrode calculations
  203. What are the differences between LC and CLC chokes
  204. gain and mid circuits
  205. Kay 503 Schematics?
  206. Transformer Data
  207. tube B 406 triode dick's cleo 4
  208. GE Snubber, High Current DC, and Switching Capacitors
  209. Russian EL84 - Many varieties
  210. Back From the Dead- A NOS Tube Story
  211. application for ccs/gyrator board from the groupbuy
  212. Building a tube radio
  213. Three more articles for the WW Archive
  214. Amplifier antics
  215. what about a tube makes it UL recommended
  216. 6as7 p-p with transformer phase-splitter
  217. Large power push pull output transformers, say 150W
  218. I need a schematic for a amp project
  219. Preamp resistors calculation for http://www.shine7.com
  220. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  221. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier
  222. Vintage tubes
  223. Amp PSU standby and PA switching
  224. 245 tubes
  225. Vacuum tube clock radio
  226. First Project, need some help
  227. Graetz Scerzo Schematic
  228. simple se 2a3 amp help!!!!!
  229. 5bc3 rectifier
  230. Help me improve this PSU. (6c33 set, voltage doubler)
  231. Choke Loaded Driver Load Lines Question
  232. CCS and tube aging
  233. Tetra lives!!!!!
  234. Tube shops/supplies in Brisbane/Gold Coast
  235. AC VT25 filament?
  236. Let's show go on: Building Monster SE!
  237. Mystery 6AQ5A powered chassis?
  238. 6Y6G tube for low-voltage SE amplifier?
  239. Jolida gain and negative feedback?
  240. 1/2 of the tube for each channel?
  241. Problem with Legacy pentode driver stage
  242. 845 Operating Point
  243. Tube rectifiers
  244. D76 Inrush current limiter thermistor?
  245. New to Tubes? How to get the basics, read on..
  246. interstage tansformer impedence
  247. 2 PSU sharing the same Power transformer?
  248. Biasing amp
  249. CCS placement
  250. clueless on console