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  1. Cheap (<100€) Digital Tube Tester from ebay; experience/build/mod thread
  2. Cleaning old tube sockets with common household products
  3. Automatic Bias Kit
  4. Triode mode Pentode G2 resistor?
  5. Rectifier.
  6. Tube gainstage for newbie
  7. Source follower irf720 or DN2540
  8. Toroidal OPT
  9. Tesla E83CC - Have done research & still havingt trouble spotting fakes from real
  10. Can Capacitor
  11. SE Power amp SG2 voltage
  12. Bias supply
  13. 7377 tube socket
  14. Power Transformer Impedance Matching
  15. zenith console amplifier (a stereo mono amplifier :) )
  16. Trutone model Teeco 610-D
  17. electromagnetic hum problem
  18. Heathkit A7 Volume.
  19. Ribbon Tube Amp
  20. Brimar ECC83 with red bottom
  21. Dynaco ST 35 Cheap Transformers source in EU
  22. Transformer input for P-P
  23. Help Identifying 12au7a From Hammond Organ
  24. K502 Bleeder and LED
  25. Cathode follower attenuates signal
  26. Anyone has a curve tracer to trace Western Electric 436A 448A 418A in triode mode ?
  27. Breadboards and tube voltages
  28. Dynaco 35 Power Supply
  29. Magic eye with tube em80-schematic or circuit
  30. Using 220v amp in country with 230v
  31. Magic eye with EM81 tube - made in China
  32. Improvement Suggestion Wanted: 6AS7 Hybrid PP Amp
  33. Tube amp instability in LTSpice (Claus Byrith 4-30)
  34. Current mfg triode's
  35. K12g upgrades
  36. Help Needed Identifying a Custom Tube Amp
  37. Capacitor Voltage rating
  38. 6dj8 6922 driver question
  39. APPJ PA0901A Repair
  40. Output tube G1 resistors question
  41. Building Mullard PP ECL86 stereo
  42. 6SN7 Parallel Preamp Anyone?
  43. Advice on Finishing my K502 Build
  44. Another SSE build question
  45. Ferrite SE Outut XFMR for HF Tube Amp
  46. Question about grounding a 2-prong tube amp
  47. Grommes Mono Block
  48. EL84 triode mode @ 425V?
  49. Hybrid amp - Grounding Suggestions?
  50. Advises asked for, exquisite taste wanted!!
  51. need a good 2a3 socket... need advice
  52. Cathode feedback comments?
  53. Does different Rectifier Tubes change the tone????
  54. Another boring day
  55. el84 Tube amp
  56. Haddon PL151 Quad II input transformer
  57. Noob question
  58. Futterman H3 Set Up
  59. Good tube amp for bass
  60. Any tube guys here use a MiniDSP
  61. Should Output Transformers be replaced
  62. Quad II questions
  63. MY OTL Tim Mellow-ESL 63 PROJECT
  64. Zobel for REDD47 w/ HA-100 Inpu
  65. Pentode P-P - cathode biasing for A and AB
  66. Why a Headphone Amp?
  67. How little B+ ripple do I really need?
  68. Need good EF86 based RIAA preamp.
  69. Marshall 9005 modification
  70. Which Tube amplifier should I build first?
  71. Sound Practices Magazines, Complete Set 98% perfect
  72. 6L6GC in Push Pull Class A - how much power out?
  73. ECC83 DC Heater Supply - without CT
  74. PPP EL84 monoblocs: i knew then what i know now...
  75. zener, voltage devider or 02A
  76. DHT heater current draw - how fast?
  77. Rca sa752
  78. Audio Research and Octal Pre's
  79. Scott 299D
  80. Unison Smart 845 big problem
  81. Need help with driver idea for 845 amp - have a few ideas
  82. Input impedance on cathode follower stage?
  83. Picked up a box of tubes for $5.. What tubes are usable?
  84. Need help on potentiometer.
  85. A Raven preamp (mk2) finished
  86. need help searching for ground
  87. Pre-amp transformer output
  88. Boyuu EL34 A9 Tube Amp
  89. Hybrid 15W, want feedback - work in-progress
  90. PT from scratch for 100 W Marshall 2555 Silver Jubilee - advices and comments ...
  91. SP12 and PH12 Pre and Phono from Vacuum Tube Audio
  92. Which tube amp for Telefunken-tlx3 loudspeakers?
  93. Burned up a tube - want to be sure I know why
  94. Output Transformer Windings in parallel
  95. New tube tech from Korg
  96. Got some PX4 valves from an old radiogram
  97. At the start: Triodedick´s Monobill Classic KT88 Monos
  98. Choose your harmonic distribution: which sound better?
  99. Recommended HT current limit for old stock power transformers
  100. preamp circuit
  101. Low impedance headphone amp
  102. "Earthing" in DIY tube preamps
  103. Tube amp help
  104. How to draw a dynamic load line for cathode bypass triode like 12AX7
  105. Common Grid design
  106. 6AW8-A
  107. Push pull amp without GNFB
  108. No filament voltage
  109. Selecting Component Values for Simple Current-Feedback Amplifier
  110. 4 Blown Soft Recovery Diodes...Are TV Damper Tubes more Reliable?
  111. Just got a nice EL84 based receiver
  112. Is there any good current Production 6550s?
  113. Building the Damn Good 300B
  114. convert trashed kolster k20 into tube amp?
  115. Junkbox Hero
  116. KT150 curves by Sofia
  117. My new EL84 Amp
  118. 1955 Bogen J330 Mic Input Problem
  119. parallel el84 output pp. shared coupling caps?
  120. Will a Western Electric 422A substitute for a 5Y3?
  121. Question for a moderator
  122. bottlehead quickie schematic
  123. RCA 6146B sub for 807 or 6L6?
  124. Leak monoblock hum
  125. Eico 2036
  126. Heathkit iT-12 signal tracer to much gain??
  127. Valve Monoblocks - am I being realistic?
  128. Aikido Headphone Amp and PS1 Power supply
  129. Transforming a triode into a pentode?
  130. New to amps - Long-tail pair and heater hum
  131. Experimenting with the Aikido 12Vac kit
  132. Strategies for Implementing Negative Feedback in a 12ax7 Line Amplifier
  133. Output Transformer Impedances
  134. PP 6l6 class ab...advice needed
  135. 300B
  136. 12AX7 EL34B TUBE AMPLIFIER
  137. UK info please
  138. PAS 2/3 RIAA Modification
  139. My Homage to the Earmax Headphone Amp
  140. Aikio Line Stage
  141. Lite Audio LS 58 schematic
  142. Lite Audio LS 58 schematic
  143. Love those triodes
  144. Differential Pair with negative feedback
  145. Quad II Eighty Schematic?
  146. Adventures with Aikido
  147. Beard BB 100 and Beard A35
  148. Noob is about to press the BIN button and buy a Chinese tube amp kit. Save me/ help?
  149. Ebay Kit EL34 6n9P 5Z3P Build Thread.
  150. Sakuma 46 / 801A Circuit
  151. Tube Manufacturing at Expo-Pul
  152. Philips EL6410, how does it sound?
  153. tube amp power help
  154. Video from the Czech Tesla Tube factory
  155. Alans' rantings
  156. 3 x 3 Tube amp 30 watts
  157. Maximum allowed capacitance after gas rectifiers
  158. PSUD2 rectifiers list
  159. EL34 amplifier with these transformers
  160. Aikido Octal Dual Mono for Dummies... Help me.
  161. Monster Trans or Really Good Doorstop?
  162. The correct way to wire DC filaments 3B7 DHT
  163. Haller Circuit Problems
  164. Need recommendation for VERY basic amp project
  165. Recommendation on tube buffer?
  166. For Your Consideration: Unity Coupled Plitron Amp, No Bootstrapped Driver, No GNF
  167. Tango Transformers - any unique push pull circuits?
  168. newbe at designing tube amp
  169. Need help with microphone preamp.
  170. Trouble shooting vintage Harman Kardon A250
  171. Coating on Hammond Power Transformer
  172. Small tube amp for PC
  173. CCS dissipation
  174. 6SL7 - grid stopper values
  175. HELP - Laying out footprint for 9 pin tube socket
  176. Telefunken Magnetophon 104 - Keep or strip?
  177. Transformer rewinding or repair needed.
  178. Sun Audio in the USA?
  179. Wyetech Opal 6SN7 tube preamp, any DIY kit sound even close?
  180. KBG capacitors
  181. Praise for the 6N6G
  182. DHT equivalent to 12AT7?
  183. Why high voltage in coupling caps?
  184. BIAS Consonance M800SE
  185. SE ECC83 - EL 84 - EZ 81 - 1964 !
  186. Name That Design!!
  187. Distortion expected in SE DC coupled 26/45 amp
  188. One Channel is Louder than the other on my Tube Phono Pre
  189. Need a Zobel Network (or RC shunt) in tube amplifier?
  190. Aikido 12VAC Help needed
  191. Novarria TU-30 output transformer
  192. Question on Schematic
  193. CJ PV-10A
  194. Mcintosh C2200 ReCap
  195. simple tube amp for music
  196. SE Parafeed Signal Return ?
  197. RCA VC274
  198. Heathkit w5
  199. tube rectifier for 1000v AC
  200. New Tubes For Peavey Valveking VK100
  201. Tone Control Intercept Point on TU 8200
  202. Help with transformer and power switch wiring
  203. Mullard 5-20 iron
  204. Hard data on HP928
  205. Glassware Audio
  206. 5U4G problem
  207. Schematic för mono el84 SE wanted
  208. qualtek power module
  209. Low Static Hum Issue
  210. Look over my whacko schematic?
  211. PSU inrush current
  212. Heathkit A7 Output transformer
  213. THose lovely triodes
  214. Just picked up a shoebox of tubes from Craigslist
  215. Lower the primary impedance of the OPT to reduce distortion?
  216. Parallel/Series heater question
  217. Jay's Cheaterpants Hong Kong Marantz 7 Clone Build-Along
  218. Unused half of dual triode in low gain input stage in mono blocks?
  219. 12AL8 PP Amp Low Volume - Is this all or i can get more?
  220. Electrolytic cap voltage
  221. Power supply resistors
  222. Aikido Headphone amplifier
  223. preamp
  224. Resistor question
  225. How to turn Salvaged Parts into Projects..
  226. Output polarity?
  227. Help with this circuit
  228. Doing silly stuff for fun
  229. Modern Mullard head scratching
  230. Leben cs660p un identified component
  231. KT88 or 6L6 High-mu triode curves
  232. Edcor 240V primary 50hz humming
  233. Aikido quesion
  234. Why 6L6 is not more popular as power tube?
  235. 304TL SET schematic redesign. EML-20b Alternative?
  236. Question about Mullard EL84 Aplication note
  237. Magnavox tuner preamp 570111
  238. Tube amps on E-Bay
  239. Input, Output and Transfer Capacitance Question
  240. K502 Mods
  241. filament supply rectifier
  242. Triode as Voltage-Controled Dynamic Resistance in Compressor/Limiter
  243. RHSpud: Novice build
  244. 2A3 Amp - Not Another One...
  245. 12b4a pp
  246. replacing ECC82 with ECC99
  247. 2A3 input sensitivity
  248. Amp for JBL 2447 driver?
  249. Rare Philips 12ax7 Code Need Help
  250. Two quick questions on 35W4

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