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  1. Pentode P-P - cathode biasing for A and AB
  2. Why a Headphone Amp?
  3. How little B+ ripple do I really need?
  4. Need good EF86 based RIAA preamp.
  5. Marshall 9005 modification
  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. PT from scratch for 100 W Marshall 2555 Silver Jubilee - advices and comments ...
  27. SP12 and PH12 Pre and Phono from Vacuum Tube Audio
  28. Which tube amp for Telefunken-tlx3 loudspeakers?
  29. Burned up a tube - want to be sure I know why
  30. Output Transformer Windings in parallel
  31. New tube tech from Korg
  32. Got some PX4 valves from an old radiogram
  33. At the start: Triodedick´s Monobill Classic KT88 Monos
  34. Choose your harmonic distribution: which sound better?
  35. Recommended HT current limit for old stock power transformers
  36. preamp circuit
  37. Low impedance headphone amp
  38. "Earthing" in DIY tube preamps
  39. Tube amp help
  40. How to draw a dynamic load line for cathode bypass triode like 12AX7
  41. Common Grid design
  42. 6AW8-A
  43. Push pull amp without GNFB
  44. No filament voltage
  45. Selecting Component Values for Simple Current-Feedback Amplifier
  46. 4 Blown Soft Recovery Diodes...Are TV Damper Tubes more Reliable?
  47. Just got a nice EL84 based receiver
  48. Is there any good current Production 6550s?
  49. Building the Damn Good 300B
  50. convert trashed kolster k20 into tube amp?
  51. Junkbox Hero
  52. KT150 curves by Sofia
  53. My new EL84 Amp
  54. 1955 Bogen J330 Mic Input Problem
  55. parallel el84 output pp. shared coupling caps?
  56. Will a Western Electric 422A substitute for a 5Y3?
  57. Question for a moderator
  58. bottlehead quickie schematic
  59. RCA 6146B sub for 807 or 6L6?
  60. Leak monoblock hum
  61. Eico 2036
  62. Heathkit iT-12 signal tracer to much gain??
  63. Valve Monoblocks - am I being realistic?
  64. Aikido Headphone Amp and PS1 Power supply
  65. Transforming a triode into a pentode?
  66. New to amps - Long-tail pair and heater hum
  67. Experimenting with the Aikido 12Vac kit
  68. Strategies for Implementing Negative Feedback in a 12ax7 Line Amplifier
  69. Output Transformer Impedances
  70. PP 6l6 class ab...advice needed
  71. 300B
  72. 12AX7 EL34B TUBE AMPLIFIER
  73. UK info please
  74. PAS 2/3 RIAA Modification
  75. My Homage to the Earmax Headphone Amp
  76. Aikio Line Stage
  77. Lite Audio LS 58 schematic
  78. Lite Audio LS 58 schematic
  79. Love those triodes
  80. Differential Pair with negative feedback
  81. Quad II Eighty Schematic?
  82. Adventures with Aikido
  83. Beard BB 100 and Beard A35
  84. Noob is about to press the BIN button and buy a Chinese tube amp kit. Save me/ help?
  85. Ebay Kit EL34 6n9P 5Z3P Build Thread.
  86. Sakuma 46 / 801A Circuit
  87. Tube Manufacturing at Expo-Pul
  88. Philips EL6410, how does it sound?
  89. tube amp power help
  90. Video from the Czech Tesla Tube factory
  91. Alans' rantings
  92. 3 x 3 Tube amp 30 watts
  93. Maximum allowed capacitance after gas rectifiers
  94. PSUD2 rectifiers list
  95. EL34 amplifier with these transformers
  96. Aikido Octal Dual Mono for Dummies... Help me.
  97. Monster Trans or Really Good Doorstop?
  98. The correct way to wire DC filaments 3B7 DHT
  99. Haller Circuit Problems
  100. Need recommendation for VERY basic amp project
  101. Recommendation on tube buffer?
  102. For Your Consideration: Unity Coupled Plitron Amp, No Bootstrapped Driver, No GNF
  103. Tango Transformers - any unique push pull circuits?
  104. newbe at designing tube amp
  105. Need help with microphone preamp.
  106. Trouble shooting vintage Harman Kardon A250
  107. Coating on Hammond Power Transformer
  108. Small tube amp for PC
  109. CCS dissipation
  110. 6SL7 - grid stopper values
  111. HELP - Laying out footprint for 9 pin tube socket
  112. Telefunken Magnetophon 104 - Keep or strip?
  113. Transformer rewinding or repair needed.
  114. Sun Audio in the USA?
  115. Wyetech Opal 6SN7 tube preamp, any DIY kit sound even close?
  116. KBG capacitors
  117. Praise for the 6N6G
  118. DHT equivalent to 12AT7?
  119. Why high voltage in coupling caps?
  120. BIAS Consonance M800SE
  121. SE ECC83 - EL 84 - EZ 81 - 1964 !
  122. Name That Design!!
  123. Distortion expected in SE DC coupled 26/45 amp
  124. One Channel is Louder than the other on my Tube Phono Pre
  125. Need a Zobel Network (or RC shunt) in tube amplifier?
  126. Aikido 12VAC Help needed
  127. Novarria TU-30 output transformer
  128. Question on Schematic
  129. CJ PV-10A
  130. Mcintosh C2200 ReCap
  131. simple tube amp for music
  132. SE Parafeed Signal Return ?
  133. RCA VC274
  134. Heathkit w5
  135. tube rectifier for 1000v AC
  136. New Tubes For Peavey Valveking VK100
  137. Tone Control Intercept Point on TU 8200
  138. Help with transformer and power switch wiring
  139. Mullard 5-20 iron
  140. Hard data on HP928
  141. Glassware Audio
  142. 5U4G problem
  143. Schematic för mono el84 SE wanted
  144. qualtek power module
  145. Low Static Hum Issue
  146. Look over my whacko schematic?
  147. PSU inrush current
  148. Heathkit A7 Output transformer
  149. THose lovely triodes
  150. Just picked up a shoebox of tubes from Craigslist
  151. Lower the primary impedance of the OPT to reduce distortion?
  152. Parallel/Series heater question
  153. Jay's Cheaterpants Hong Kong Marantz 7 Clone Build-Along
  154. Unused half of dual triode in low gain input stage in mono blocks?
  155. 12AL8 PP Amp Low Volume - Is this all or i can get more?
  156. Electrolytic cap voltage
  157. Power supply resistors
  158. Aikido Headphone amplifier
  159. preamp
  160. Resistor question
  161. How to turn Salvaged Parts into Projects..
  162. Output polarity?
  163. Help with this circuit
  164. Doing silly stuff for fun
  165. Modern Mullard head scratching
  166. Leben cs660p un identified component
  167. KT88 or 6L6 High-mu triode curves
  168. Edcor 240V primary 50hz humming
  169. Aikido quesion
  170. Why 6L6 is not more popular as power tube?
  171. 304TL SET schematic redesign. EML-20b Alternative?
  172. Question about Mullard EL84 Aplication note
  173. Magnavox tuner preamp 570111
  174. Tube amps on E-Bay
  175. Input, Output and Transfer Capacitance Question
  176. K502 Mods
  177. filament supply rectifier
  178. Triode as Voltage-Controled Dynamic Resistance in Compressor/Limiter
  179. RHSpud: Novice build
  180. 2A3 Amp - Not Another One...
  181. 12b4a pp
  182. replacing ECC82 with ECC99
  183. 2A3 input sensitivity
  184. Amp for JBL 2447 driver?
  185. Rare Philips 12ax7 Code Need Help
  186. Two quick questions on 35W4
  187. To convert Novar pins for Magnovale pins
  188. Mingda mc7r late design tweaking
  189. PSU for KT-90 PPP
  190. Noisy amp
  191. Book Recommendation for Newbies
  192. High power GU46 SE amplifier - help with certain issues
  193. Boyuu hifi Equis A10 EL34B+6N2 SE Tube Amplifier with 5Z4P rectifier: review and mod
  194. Unknown SE output transformer wiring
  195. Class A output without all the heat cheat
  196. Grid leak bias - Easy to overload?
  197. How about LTP with degenerate resistor?
  198. 1200 vdc capacitor tube amp.
  199. Telefunken OPT
  200. Fixed bias question
  201. Question about loadline in Morgan Jones
  202. Please explain this power supply...
  203. 6SN7 - EL84 SE with interstage?
  204. 211 amp test. Square wave measures
  205. SAC thailand OPT for 211/845
  206. 6P21s
  207. 6L7M, Is there any use in audio?
  208. 958a Line Preamp
  209. What capacitors do i need for this?
  210. Experience of the TentLabs Bias control modules?
  211. Simple Line Stage Topology
  212. compound/hybrid amp
  213. 6CJ3's in full wave rectifier
  214. CCS anode load overcomes 3/2 law non-linearity
  215. EL84 PP OT design for amp project
  216. $3k o/p XFR
  217. Jadis Factory Tour
  218. Considerations for Tubelab Simplse
  219. "budget" headphone amp
  220. Power Pulse Tetrode for Audio
  221. The SE UL 6P41S USSR
  222. buzz from dacmagic on kit st70
  223. WE 350B and WE311B available
  224. How determine p-g1 capacitance in trioded pentode
  225. Why Is My Single Chassis #26 PreAmp So Stable!
  226. Rare tube
  227. Allan's rantings
  228. Tube Amp problem ?
  229. Tube preamp SS PS slight thump like dead wax on an LP
  230. Hum if volume control between midpoint and max; No hum if volume knob at max or zero
  231. SET's first ripple in a big wave ? Here it is . . .
  232. Fourier Chassis for the shipping costs
  233. 6P3S/6L6GB Amplifier from scrap parts :)
  234. Choke loaded 6ax4 bridge
  235. Transformer and choke orientation question
  236. Why some people want DC coupling in power amp?
  237. want to diy a tube preamp using only 12 volts help
  238. Russian 6p3s??
  239. Single-ended 8w amp
  240. Hovland HP 100
  241. Simple Line Stage Expanded
  242. Bridge Rectifier with Fullwave Tube
  243. Can anyone help diagnose this SOHA II amp channel?
  244. Schade and the 6C33C
  245. AMC 3030 annoying ripple noise
  246. Question and comments on SE vs PP by Eddie Vaughn
  247. 6080 PSE output Tx?
  248. Difference Between Self-Inverting Push Pull and Anti-Triode?
  249. Is this capacitor required?
  250. Why nowadays tube amplifier should play better than 1960's amplifiers?

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