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  1. Question about grounding a 2-prong tube amp
  2. Grommes Mono Block
  3. EL84 triode mode @ 425V?
  4. Hybrid amp - Grounding Suggestions?
  5. Advises asked for, exquisite taste wanted!!
  6. need a good 2a3 socket... need advice
  7. Cathode feedback comments?
  8. Does different Rectifier Tubes change the tone????
  9. Another boring day
  10. el84 Tube amp
  11. Haddon PL151 Quad II input transformer
  12. Noob question
  13. Futterman H3 Set Up
  14. Any tube guys here use a MiniDSP
  15. Should Output Transformers be replaced
  16. Quad II questions
  17. MY OTL Tim Mellow-ESL 63 PROJECT
  18. Zobel for REDD47 w/ HA-100 Inpu
  19. Pentode P-P - cathode biasing for A and AB
  20. Why a Headphone Amp?
  21. How little B+ ripple do I really need?
  22. Need good EF86 based RIAA preamp.
  23. Which Tube amplifier should I build first?
  24. 6L6GC in Push Pull Class A - how much power out?
  25. ECC83 DC Heater Supply - without CT
  26. PPP EL84 monoblocs: i knew then what i know now...
  27. zener, voltage devider or 02A
  28. DHT heater current draw - how fast?
  29. Rca sa752
  30. Audio Research and Octal Pre's
  31. Scott 299D
  32. Unison Smart 845 big problem
  33. Need help with driver idea for 845 amp - have a few ideas
  34. Input impedance on cathode follower stage?
  35. Picked up a box of tubes for $5.. What tubes are usable?
  36. A Raven preamp (mk2) finished
  37. need help searching for ground
  38. Pre-amp transformer output
  39. Boyuu EL34 A9 Tube Amp
  40. Hybrid 15W, want feedback - work in-progress
  41. SP12 and PH12 Pre and Phono from Vacuum Tube Audio
  42. Which tube amp for Telefunken-tlx3 loudspeakers?
  43. Burned up a tube - want to be sure I know why
  44. Output Transformer Windings in parallel
  45. New tube tech from Korg
  46. Got some PX4 valves from an old radiogram
  47. At the start: Triodedick´s Monobill Classic KT88 Monos
  48. Recommended HT current limit for old stock power transformers
  49. preamp circuit
  50. Low impedance headphone amp
  51. "Earthing" in DIY tube preamps
  52. Tube amp help
  53. How to draw a dynamic load line for cathode bypass triode like 12AX7
  54. Common Grid design
  55. 6AW8-A
  56. Push pull amp without GNFB
  57. No filament voltage
  58. Selecting Component Values for Simple Current-Feedback Amplifier
  59. 4 Blown Soft Recovery Diodes...Are TV Damper Tubes more Reliable?
  60. Just got a nice EL84 based receiver
  61. Is there any good current Production 6550s?
  62. Building the Damn Good 300B
  63. convert trashed kolster k20 into tube amp?
  64. Junkbox Hero
  65. KT150 curves by Sofia
  66. My new EL84 Amp
  67. parallel el84 output pp. shared coupling caps?
  68. Will a Western Electric 422A substitute for a 5Y3?
  69. Question for a moderator
  70. bottlehead quickie schematic
  71. RCA 6146B sub for 807 or 6L6?
  72. Leak monoblock hum
  73. Eico 2036
  74. Heathkit iT-12 signal tracer to much gain??
  75. Valve Monoblocks - am I being realistic?
  76. Aikido Headphone Amp and PS1 Power supply
  77. Transforming a triode into a pentode?
  78. New to amps - Long-tail pair and heater hum
  79. Experimenting with the Aikido 12Vac kit
  80. Strategies for Implementing Negative Feedback in a 12ax7 Line Amplifier
  81. Output Transformer Impedances
  82. PP 6l6 class ab...advice needed
  83. 300B
  84. 12AX7 EL34B TUBE AMPLIFIER
  85. UK info please
  86. PAS 2/3 RIAA Modification
  87. My Homage to the Earmax Headphone Amp
  88. Aikio Line Stage
  89. Love those triodes
  90. Differential Pair with negative feedback
  91. Quad II Eighty Schematic?
  92. Adventures with Aikido
  93. Beard BB 100 and Beard A35
  94. Noob is about to press the BIN button and buy a Chinese tube amp kit. Save me/ help?
  95. Ebay Kit EL34 6n9P 5Z3P Build Thread.
  96. Sakuma 46 / 801A Circuit
  97. Tube Manufacturing at Expo-Pul
  98. Philips EL6410, how does it sound?
  99. tube amp power help
  100. Video from the Czech Tesla Tube factory
  101. Alan0354's Rantings
  102. 3 x 3 Tube amp 30 watts
  103. Maximum allowed capacitance after gas rectifiers
  104. PSUD2 rectifiers list
  105. EL34 amplifier with these transformers
  106. Aikido Octal Dual Mono for Dummies... Help me.
  107. Monster Trans or Really Good Doorstop?
  108. The correct way to wire DC filaments 3B7 DHT
  109. Haller Circuit Problems
  110. Need recommendation for VERY basic amp project
  111. Recommendation on tube buffer?
  112. For Your Consideration: Unity Coupled Plitron Amp, No Bootstrapped Driver, No GNF
  113. Tango Transformers - any unique push pull circuits?
  114. newbe at designing tube amp
  115. Trouble shooting vintage Harman Kardon A250
  116. Coating on Hammond Power Transformer
  117. Small tube amp for PC
  118. CCS dissipation
  119. 6SL7 - grid stopper values
  120. HELP - Laying out footprint for 9 pin tube socket
  121. Telefunken Magnetophon 104 - Keep or strip?
  122. Transformer rewinding or repair needed.
  123. Sun Audio in the USA?
  124. Wyetech Opal 6SN7 tube preamp, any DIY kit sound even close?
  125. Praise for the 6N6G
  126. DHT equivalent to 12AT7?
  127. BIAS Consonance M800SE
  128. SE ECC83 - EL 84 - EZ 81 - 1964 !
  129. Name That Design!!
  130. Distortion expected in SE DC coupled 26/45 amp
  131. One Channel is Louder than the other on my Tube Phono Pre
  132. Need a Zobel Network (or RC shunt) in tube amplifier?
  133. Aikido 12VAC Help needed
  134. Novarria TU-30 output transformer
  135. Question on Schematic
  136. CJ PV-10A
  137. Mcintosh C2200 ReCap
  138. simple tube amp for music
  139. SE Parafeed Signal Return ?
  140. RCA VC274
  141. Heathkit w5
  142. tube rectifier for 1000v AC
  143. Tone Control Intercept Point on TU 8200
  144. Help with transformer and power switch wiring
  145. Mullard 5-20 iron
  146. Hard data on HP928
  147. Glassware Audio
  148. 5U4G problem
  149. Schematic för mono el84 SE wanted
  150. qualtek power module
  151. Low Static Hum Issue
  152. Look over my whacko schematic?
  153. PSU inrush current
  154. Heathkit A7 Output transformer
  155. THose lovely triodes
  156. Just picked up a shoebox of tubes from Craigslist
  157. Lower the primary impedance of the OPT to reduce distortion?
  158. Parallel/Series heater question
  159. Jay's Cheaterpants Hong Kong Marantz 7 Clone Build-Along
  160. Unused half of dual triode in low gain input stage in mono blocks?
  161. 12AL8 PP Amp Low Volume - Is this all or i can get more?
  162. Power supply resistors
  163. Aikido Headphone amplifier
  164. preamp
  165. How to turn Salvaged Parts into Projects..
  166. Output polarity?
  167. Help with this circuit
  168. Doing silly stuff for fun
  169. Modern Mullard head scratching
  170. Leben cs660p un identified component
  171. KT88 or 6L6 High-mu triode curves
  172. Edcor 240V primary 50hz humming
  173. Aikido quesion
  174. Why 6L6 is not more popular as power tube?
  175. 304TL SET schematic redesign. EML-20b Alternative?
  176. Question about Mullard EL84 Aplication note
  177. Magnavox tuner preamp 570111
  178. Tube amps on E-Bay
  179. Input, Output and Transfer Capacitance Question
  180. K502 Mods
  181. filament supply rectifier
  182. Triode as Voltage-Controled Dynamic Resistance in Compressor/Limiter
  183. RHSpud: Novice build
  184. 2A3 Amp - Not Another One...
  185. 12b4a pp
  186. replacing ECC82 with ECC99
  187. 2A3 input sensitivity
  188. Amp for JBL 2447 driver?
  189. Rare Philips 12ax7 Code Need Help
  190. Two quick questions on 35W4
  191. To convert Novar pins for Magnovale pins
  192. Mingda mc7r late design tweaking
  193. PSU for KT-90 PPP
  194. Noisy amp
  195. Book Recommendation for Newbies
  196. High power GU46 SE amplifier - help with certain issues
  197. Boyuu hifi Equis A10 EL34B+6N2 SE Tube Amplifier with 5Z4P rectifier: review and mod
  198. Unknown SE output transformer wiring
  199. Class A output without all the heat cheat
  200. Grid leak bias - Easy to overload?
  201. How about LTP with degenerate resistor?
  202. 1200 vdc capacitor tube amp.
  203. Telefunken OPT
  204. Fixed bias question
  205. Question about loadline in Morgan Jones
  206. Please explain this power supply...
  207. 6SN7 - EL84 SE with interstage?
  208. 211 amp test. Square wave measures
  209. SAC thailand OPT for 211/845
  210. 6P21s
  211. 6L7M, Is there any use in audio?
  212. 958a Line Preamp
  213. Experience of the TentLabs Bias control modules?
  214. Simple Line Stage Topology
  215. compound/hybrid amp
  216. 6CJ3's in full wave rectifier
  217. CCS anode load overcomes 3/2 law non-linearity
  218. EL84 PP OT design for amp project
  219. $3k o/p XFR
  220. Jadis Factory Tour
  221. "budget" headphone amp
  222. Power Pulse Tetrode for Audio
  223. The SE UL 6P41S USSR
  224. buzz from dacmagic on kit st70
  225. WE 350B and WE311B available
  226. How determine p-g1 capacitance in trioded pentode
  227. Why Is My Single Chassis #26 PreAmp So Stable!
  228. Rare tube
  229. Alan's rantings
  230. Tube Amp problem ?
  231. Tube preamp SS PS slight thump like dead wax on an LP
  232. Hum if volume control between midpoint and max; No hum if volume knob at max or zero
  233. SET's first ripple in a big wave ? Here it is . . .
  234. 6P3S/6L6GB Amplifier from scrap parts :)
  235. Choke loaded 6ax4 bridge
  236. Transformer and choke orientation question
  237. Why some people want DC coupling in power amp?
  238. want to diy a tube preamp using only 12 volts help
  239. Russian 6p3s??
  240. Single-ended 8w amp
  241. Hovland HP 100
  242. Simple Line Stage Expanded
  243. Bridge Rectifier with Fullwave Tube
  244. Can anyone help diagnose this SOHA II amp channel?
  245. Schade and the 6C33C
  246. AMC 3030 annoying ripple noise
  247. Question and comments on SE vs PP by Eddie Vaughn
  248. 6080 PSE output Tx?
  249. Difference Between Self-Inverting Push Pull and Anti-Triode?
  250. Is this capacitor required?

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