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  1. Zobel for REDD47 w/ HA-100 Inpu
  2. Pentode P-P - cathode biasing for A and AB
  3. Why a Headphone Amp?
  4. How little B+ ripple do I really need?
  5. Need good EF86 based RIAA preamp.
  6. Which Tube amplifier should I build first?
  7. Sound Practices Magazines, Complete Set 98% perfect
  8. 6L6GC in Push Pull Class A - how much power out?
  9. ECC83 DC Heater Supply - without CT
  10. PPP EL84 monoblocs: i knew then what i know now...
  11. zener, voltage devider or 02A
  12. DHT heater current draw - how fast?
  13. Rca sa752
  14. Audio Research and Octal Pre's
  15. Scott 299D
  16. Unison Smart 845 big problem
  17. Need help with driver idea for 845 amp - have a few ideas
  18. Input impedance on cathode follower stage?
  19. Picked up a box of tubes for $5.. What tubes are usable?
  20. Need help on potentiometer.
  21. A Raven preamp (mk2) finished
  22. need help searching for ground
  23. Pre-amp transformer output
  24. Boyuu EL34 A9 Tube Amp
  25. Hybrid 15W, want feedback - work in-progress
  26. SP12 and PH12 Pre and Phono from Vacuum Tube Audio
  27. Which tube amp for Telefunken-tlx3 loudspeakers?
  28. Burned up a tube - want to be sure I know why
  29. Output Transformer Windings in parallel
  30. New tube tech from Korg
  31. Got some PX4 valves from an old radiogram
  32. At the start: Triodedick´s Monobill Classic KT88 Monos
  33. Choose your harmonic distribution: which sound better?
  34. Recommended HT current limit for old stock power transformers
  35. preamp circuit
  36. Low impedance headphone amp
  37. "Earthing" in DIY tube preamps
  38. Tube amp help
  39. How to draw a dynamic load line for cathode bypass triode like 12AX7
  40. Common Grid design
  41. 6AW8-A
  42. Push pull amp without GNFB
  43. No filament voltage
  44. Selecting Component Values for Simple Current-Feedback Amplifier
  45. 4 Blown Soft Recovery Diodes...Are TV Damper Tubes more Reliable?
  46. Just got a nice EL84 based receiver
  47. Is there any good current Production 6550s?
  48. Building the Damn Good 300B
  49. convert trashed kolster k20 into tube amp?
  50. Junkbox Hero
  51. KT150 curves by Sofia
  52. My new EL84 Amp
  53. 1955 Bogen J330 Mic Input Problem
  54. parallel el84 output pp. shared coupling caps?
  55. Will a Western Electric 422A substitute for a 5Y3?
  56. Question for a moderator
  57. bottlehead quickie schematic
  58. RCA 6146B sub for 807 or 6L6?
  59. Leak monoblock hum
  60. Eico 2036
  61. Heathkit iT-12 signal tracer to much gain??
  62. Valve Monoblocks - am I being realistic?
  63. Aikido Headphone Amp and PS1 Power supply
  64. Transforming a triode into a pentode?
  65. New to amps - Long-tail pair and heater hum
  66. Experimenting with the Aikido 12Vac kit
  67. Strategies for Implementing Negative Feedback in a 12ax7 Line Amplifier
  68. Output Transformer Impedances
  69. PP 6l6 class ab...advice needed
  70. 300B
  71. 12AX7 EL34B TUBE AMPLIFIER
  72. UK info please
  73. PAS 2/3 RIAA Modification
  74. My Homage to the Earmax Headphone Amp
  75. Aikio Line Stage
  76. Lite Audio LS 58 schematic
  77. Lite Audio LS 58 schematic
  78. Love those triodes
  79. Differential Pair with negative feedback
  80. Quad II Eighty Schematic?
  81. Adventures with Aikido
  82. Beard BB 100 and Beard A35
  83. Noob is about to press the BIN button and buy a Chinese tube amp kit. Save me/ help?
  84. Ebay Kit EL34 6n9P 5Z3P Build Thread.
  85. Sakuma 46 / 801A Circuit
  86. Tube Manufacturing at Expo-Pul
  87. Philips EL6410, how does it sound?
  88. tube amp power help
  89. Video from the Czech Tesla Tube factory
  90. Alans' rantings
  91. 3 x 3 Tube amp 30 watts
  92. Maximum allowed capacitance after gas rectifiers
  93. PSUD2 rectifiers list
  94. EL34 amplifier with these transformers
  95. Aikido Octal Dual Mono for Dummies... Help me.
  96. Monster Trans or Really Good Doorstop?
  97. The correct way to wire DC filaments 3B7 DHT
  98. Haller Circuit Problems
  99. Need recommendation for VERY basic amp project
  100. Recommendation on tube buffer?
  101. For Your Consideration: Unity Coupled Plitron Amp, No Bootstrapped Driver, No GNF
  102. Tango Transformers - any unique push pull circuits?
  103. newbe at designing tube amp
  104. Need help with microphone preamp.
  105. Trouble shooting vintage Harman Kardon A250
  106. Coating on Hammond Power Transformer
  107. Small tube amp for PC
  108. CCS dissipation
  109. 6SL7 - grid stopper values
  110. HELP - Laying out footprint for 9 pin tube socket
  111. Telefunken Magnetophon 104 - Keep or strip?
  112. Transformer rewinding or repair needed.
  113. Sun Audio in the USA?
  114. Wyetech Opal 6SN7 tube preamp, any DIY kit sound even close?
  115. KBG capacitors
  116. Praise for the 6N6G
  117. DHT equivalent to 12AT7?
  118. Why high voltage in coupling caps?
  119. BIAS Consonance M800SE
  120. SE ECC83 - EL 84 - EZ 81 - 1964 !
  121. Name That Design!!
  122. Distortion expected in SE DC coupled 26/45 amp
  123. One Channel is Louder than the other on my Tube Phono Pre
  124. Need a Zobel Network (or RC shunt) in tube amplifier?
  125. Aikido 12VAC Help needed
  126. Novarria TU-30 output transformer
  127. Question on Schematic
  128. CJ PV-10A
  129. Mcintosh C2200 ReCap
  130. simple tube amp for music
  131. SE Parafeed Signal Return ?
  132. RCA VC274
  133. Heathkit w5
  134. tube rectifier for 1000v AC
  135. Tone Control Intercept Point on TU 8200
  136. Help with transformer and power switch wiring
  137. Mullard 5-20 iron
  138. Hard data on HP928
  139. Glassware Audio
  140. 5U4G problem
  141. Schematic för mono el84 SE wanted
  142. qualtek power module
  143. Low Static Hum Issue
  144. Look over my whacko schematic?
  145. PSU inrush current
  146. Heathkit A7 Output transformer
  147. THose lovely triodes
  148. Just picked up a shoebox of tubes from Craigslist
  149. Lower the primary impedance of the OPT to reduce distortion?
  150. Parallel/Series heater question
  151. Jay's Cheaterpants Hong Kong Marantz 7 Clone Build-Along
  152. Unused half of dual triode in low gain input stage in mono blocks?
  153. 12AL8 PP Amp Low Volume - Is this all or i can get more?
  154. Power supply resistors
  155. Aikido Headphone amplifier
  156. preamp
  157. Resistor question
  158. How to turn Salvaged Parts into Projects..
  159. Output polarity?
  160. Help with this circuit
  161. Doing silly stuff for fun
  162. Modern Mullard head scratching
  163. Leben cs660p un identified component
  164. KT88 or 6L6 High-mu triode curves
  165. Edcor 240V primary 50hz humming
  166. Aikido quesion
  167. Why 6L6 is not more popular as power tube?
  168. 304TL SET schematic redesign. EML-20b Alternative?
  169. Question about Mullard EL84 Aplication note
  170. Magnavox tuner preamp 570111
  171. Tube amps on E-Bay
  172. Input, Output and Transfer Capacitance Question
  173. K502 Mods
  174. filament supply rectifier
  175. Triode as Voltage-Controled Dynamic Resistance in Compressor/Limiter
  176. RHSpud: Novice build
  177. 2A3 Amp - Not Another One...
  178. 12b4a pp
  179. replacing ECC82 with ECC99
  180. 2A3 input sensitivity
  181. Amp for JBL 2447 driver?
  182. Rare Philips 12ax7 Code Need Help
  183. Two quick questions on 35W4
  184. To convert Novar pins for Magnovale pins
  185. Mingda mc7r late design tweaking
  186. PSU for KT-90 PPP
  187. Noisy amp
  188. Book Recommendation for Newbies
  189. High power GU46 SE amplifier - help with certain issues
  190. Boyuu hifi Equis A10 EL34B+6N2 SE Tube Amplifier with 5Z4P rectifier: review and mod
  191. Unknown SE output transformer wiring
  192. Class A output without all the heat cheat
  193. Grid leak bias - Easy to overload?
  194. How about LTP with degenerate resistor?
  195. 1200 vdc capacitor tube amp.
  196. Telefunken OPT
  197. Fixed bias question
  198. Question about loadline in Morgan Jones
  199. Please explain this power supply...
  200. 6SN7 - EL84 SE with interstage?
  201. 211 amp test. Square wave measures
  202. SAC thailand OPT for 211/845
  203. 6P21s
  204. 6L7M, Is there any use in audio?
  205. 958a Line Preamp
  206. What capacitors do i need for this?
  207. Experience of the TentLabs Bias control modules?
  208. Simple Line Stage Topology
  209. compound/hybrid amp
  210. 6CJ3's in full wave rectifier
  211. CCS anode load overcomes 3/2 law non-linearity
  212. EL84 PP OT design for amp project
  213. $3k o/p XFR
  214. Jadis Factory Tour
  215. Considerations for Tubelab Simplse
  216. "budget" headphone amp
  217. Power Pulse Tetrode for Audio
  218. The SE UL 6P41S USSR
  219. buzz from dacmagic on kit st70
  220. WE 350B and WE311B available
  221. How determine p-g1 capacitance in trioded pentode
  222. Why Is My Single Chassis #26 PreAmp So Stable!
  223. Rare tube
  224. Allan's rantings
  225. Tube Amp problem ?
  226. Tube preamp SS PS slight thump like dead wax on an LP
  227. Hum if volume control between midpoint and max; No hum if volume knob at max or zero
  228. SET's first ripple in a big wave ? Here it is . . .
  229. Fourier Chassis for the shipping costs
  230. 6P3S/6L6GB Amplifier from scrap parts :)
  231. Choke loaded 6ax4 bridge
  232. Transformer and choke orientation question
  233. Why some people want DC coupling in power amp?
  234. want to diy a tube preamp using only 12 volts help
  235. Russian 6p3s??
  236. Single-ended 8w amp
  237. Hovland HP 100
  238. Simple Line Stage Expanded
  239. Bridge Rectifier with Fullwave Tube
  240. Can anyone help diagnose this SOHA II amp channel?
  241. Schade and the 6C33C
  242. AMC 3030 annoying ripple noise
  243. Question and comments on SE vs PP by Eddie Vaughn
  244. 6080 PSE output Tx?
  245. Difference Between Self-Inverting Push Pull and Anti-Triode?
  246. Is this capacitor required?
  247. Why nowadays tube amplifier should play better than 1960's amplifiers?
  248. Aikido 12vac
  249. iPod to Adcom tube buffer
  250. Referencing a direct coupled output stage

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