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  1. playing tube amps through a generator
  2. Need help with a preamp board I bought on eBay
  3. Question on Tube Rectifier..help please.
  4. 2A3 Hum Problems in SE (Please Help!)
  5. 240v to 110v for Sun Valley JB-300B
  6. Tubelab SPP Schematic
  7. SE output transformer
  8. single-ended.com annoyance
  9. A cheapo decent splitter
  10. Lightbulb Base Failure
  11. Madison Fielding Rcvr -- Filament Trick
  12. Converting from UL to Triode: Is this correct?
  13. white follower for driving mosfets.
  14. Distance between two audio input valves
  15. Series Caps on Power Supply
  16. Most expensive parts in DIY tube amp
  17. Filter Choke Selection
  18. 6072A as DAC outputstage
  19. adapting line level to suitcase record player
  20. Aikido Noval Stereo Questions
  21. 100K 2CH Volume pot recommendation
  22. Another Daft Idea
  23. Allen Model 75 user feedback needed
  24. My perfect 6550 PP amp :)
  25. Marantz 8b power transformer - open winding
  26. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  27. Mini Carver Silver Seven?
  28. Using EL34 for allen wright's pp-2c
  29. Ampex 6973 mono blocks
  30. Antique Sound Lab AQ 2001 preamp issues
  31. Quad II hums
  32. Musical Fidelity XCAN V1
  33. Cathode Follower high power class B grid driver
  34. McIntosh MC 60 bias/voltage problem
  35. how to add a sub amp in parallel to S5-12G tube amplifier
  36. 5U4GB (rectifier) Arcing - What to think?
  37. I found these ripped pieces of paper..
  38. chassis grounding questions
  39. motorola ecl82 3 channel amp?
  40. Parallel Push Pull Circuit?
  41. Older valve amps chassis grounding
  42. Just about settled on building my first amp.
  43. 6L6 Triode AB Push/Pull Pout
  44. Schade and CFB exactly equivalent
  45. need some advice on updating this one
  46. Abdellah KT88 cathode follower addition?
  47. Where to buy vacuum tubes in Hong Kong city?
  48. Help needed on restoring a Bogen AP-200 amp
  49. homemade case for a homemade amplifier
  50. Two driver options for 300B push pull
  51. Heath Williamson type W-3M
  52. 6n3c 12ax7 amplifier
  53. HELP needed to design/build DRD 6C33C SET
  54. k12g left channel is out
  55. Yaqin MC-100B... anyone modded for tape loop?
  56. Simple Se build, Which tube?
  57. Re-thinking Hybrid!
  58. History of RIAA standards
  59. GU48/833A medium power SET
  60. Bass control causing hum + no bass from left channel
  61. bad PX4? dark blue glow
  62. Soft Start/bucking transformer For Marantz 9 Monoblocks
  63. Direct coupling with CCS
  64. 407A/B Preamp
  65. Bad 845 tube? (video link)
  66. Dynaco PAS 4
  67. OTL Amplifier in 1990 Glass Audio Magazine
  68. Volume drop when playing and hiss noise at turning off from one channel
  69. OPT in or near loudspeaker?
  70. Soft start for tube amplifier
  71. Transformer Sizing, etc
  72. 4P1L filament oscillation
  73. Toroidal power transformers in a tube amp
  74. No left channel output
  75. Conrad Johnson PV-10 squeal!
  76. Need expert help on EL34 SE tube amplifier.
  77. Coupling Caps
  78. 12pin/compactron tube socket
  79. Aikido audio problem w/ mains voltage fluctuations
  80. Radford STA-12
  81. New popping sound from my amp
  82. Line stage experiments with 6sn7
  83. simple SE headphone amp
  84. Aesthetix Metis Linestage
  85. Problem with Antique Sounds Pre Amp
  86. Output coupling capacitor question
  87. Screen Voltage present without B+
  88. jolida jd3000b preamp
  89. Need help on output transformer wiring alternatives
  90. Hi-End Push-Pull universal driver
  91. schematic for pentode 42 SE
  92. 6L6 / EL34 / EL84 / 6V6 frequency response curves?
  93. cheap and dirty supply
  94. EL84 SET red plating problem
  95. Using Aikido Topology to make Phono Preamp and Power Supply
  96. 5687 & OB2 as an excellent HT regulator
  97. 6S45P-E questions
  98. Extreme hybrid, a 100W with the vacuum tube sound
  99. Test Settings for a EL33/6AG6/6M6 on Eico 628 tester
  100. Chinook (Baby Amp II)
  101. Einstein Amplifier Input and Driver Section
  102. Tube System for Symphony/Jazz
  103. What is the purpose of C3 & C4?
  104. Yes, I'm the one who bought it...
  105. Capacitor Values
  106. Parks Audio / Triode ST35 kit?
  107. noob question.
  108. First stereo amp "Newbie" questions
  109. Newbie tries to design an amp
  110. Help - analysis on an output KT88 PP amp
  111. 12T10 triode connection - similar "real" triode to compare to?
  112. Recommendations for tube preamp (vinyl playback)
  113. Magnavox 8802 refurb boutique or standard parts.
  114. Allen model 75 organ amplifiers modifications
  115. Capacitance of rectifier tubes/valves near V=0??
  116. Volume/selector switch
  117. Auto Bias w/ LM317
  118. Volume drops and then comes back - anyone recognizes the sympthom?
  119. Cathode Follower and Volume Pot
  120. Dyna Mark III monoblocks. Driver boards and some questions on modding.
  121. switching a 5y3 for a 5y4?
  122. K-12M in Ultra Linear Mode Volume Issue
  123. SA 260 Pilot tube amplifier
  124. Standard Earmax Mod
  125. 470V using Bridge vs. 230V using Doubler
  126. Troublesome hybrid shengya a10..
  127. Heater Dropping Resistors
  128. Useing Mosfet in cathode leg of phase splitter
  129. Cheap (<100€) Digital Tube Tester from ebay; experience/build/mod thread
  130. Cleaning old tube sockets with common household products
  131. Automatic Bias Kit
  132. Triode mode Pentode G2 resistor?
  133. Rectifier.
  134. Tube gainstage for newbie
  135. Source follower irf720 or DN2540
  136. Toroidal OPT
  137. Tesla E83CC - Have done research & still havingt trouble spotting fakes from real
  138. SE Power amp SG2 voltage
  139. Bias supply
  140. 7377 tube socket
  141. Power Transformer Impedance Matching
  142. zenith console amplifier (a stereo mono amplifier :) )
  143. Trutone model Teeco 610-D
  144. electromagnetic hum problem
  145. Heathkit A7 Volume.
  146. Ribbon Tube Amp
  147. Brimar ECC83 with red bottom
  148. Dynaco ST 35 Cheap Transformers source in EU
  149. Transformer input for P-P
  150. Help Identifying 12au7a From Hammond Organ
  151. K502 Bleeder and LED
  152. Cathode follower attenuates signal
  153. Anyone has a curve tracer to trace Western Electric 436A 448A 418A in triode mode ?
  154. Breadboards and tube voltages
  155. Dynaco 35 Power Supply
  156. Magic eye with tube em80-schematic or circuit
  157. Using 220v amp in country with 230v
  158. Magic eye with EM81 tube - made in China
  159. Improvement Suggestion Wanted: 6AS7 Hybrid PP Amp
  160. Tube amp instability in LTSpice (Claus Byrith 4-30)
  161. Current mfg triode's
  162. K12g upgrades
  163. Help Needed Identifying a Custom Tube Amp
  164. 6dj8 6922 driver question
  165. APPJ PA0901A Repair
  166. Output tube G1 resistors question
  167. Building Mullard PP ECL86 stereo
  168. 6SN7 Parallel Preamp Anyone?
  169. Advice on Finishing my K502 Build
  170. Another SSE build question
  171. Ferrite SE Outut XFMR for HF Tube Amp
  172. Question about grounding a 2-prong tube amp
  173. Grommes Mono Block
  174. EL84 triode mode @ 425V?
  175. Hybrid amp - Grounding Suggestions?
  176. Advises asked for, exquisite taste wanted!!
  177. need a good 2a3 socket... need advice
  178. Cathode feedback comments?
  179. Does different Rectifier Tubes change the tone????
  180. Another boring day
  181. el84 Tube amp
  182. Haddon PL151 Quad II input transformer
  183. Noob question
  184. Futterman H3 Set Up
  185. Any tube guys here use a MiniDSP
  186. Should Output Transformers be replaced
  187. Quad II questions
  188. MY OTL Tim Mellow-ESL 63 PROJECT
  189. Zobel for REDD47 w/ HA-100 Inpu
  190. Pentode P-P - cathode biasing for A and AB
  191. Why a Headphone Amp?
  192. How little B+ ripple do I really need?
  193. Need good EF86 based RIAA preamp.
  194. Which Tube amplifier should I build first?
  195. Sound Practices Magazines, Complete Set 98% perfect
  196. 6L6GC in Push Pull Class A - how much power out?
  197. ECC83 DC Heater Supply - without CT
  198. PPP EL84 monoblocs: i knew then what i know now...
  199. zener, voltage devider or 02A
  200. DHT heater current draw - how fast?
  201. Rca sa752
  202. Audio Research and Octal Pre's
  203. Scott 299D
  204. Unison Smart 845 big problem
  205. Need help with driver idea for 845 amp - have a few ideas
  206. Input impedance on cathode follower stage?
  207. Picked up a box of tubes for $5.. What tubes are usable?
  208. Need help on potentiometer.
  209. A Raven preamp (mk2) finished
  210. need help searching for ground
  211. Pre-amp transformer output
  212. Boyuu EL34 A9 Tube Amp
  213. Hybrid 15W, want feedback - work in-progress
  214. SP12 and PH12 Pre and Phono from Vacuum Tube Audio
  215. Which tube amp for Telefunken-tlx3 loudspeakers?
  216. Burned up a tube - want to be sure I know why
  217. Output Transformer Windings in parallel
  218. New tube tech from Korg
  219. Got some PX4 valves from an old radiogram
  220. At the start: Triodedick´s Monobill Classic KT88 Monos
  221. Choose your harmonic distribution: which sound better?
  222. Recommended HT current limit for old stock power transformers
  223. preamp circuit
  224. Low impedance headphone amp
  225. "Earthing" in DIY tube preamps
  226. Tube amp help
  227. How to draw a dynamic load line for cathode bypass triode like 12AX7
  228. Common Grid design
  229. 6AW8-A
  230. Push pull amp without GNFB
  231. No filament voltage
  232. Selecting Component Values for Simple Current-Feedback Amplifier
  233. 4 Blown Soft Recovery Diodes...Are TV Damper Tubes more Reliable?
  234. Just got a nice EL84 based receiver
  235. Is there any good current Production 6550s?
  236. Building the Damn Good 300B
  237. convert trashed kolster k20 into tube amp?
  238. Junkbox Hero
  239. KT150 curves by Sofia
  240. My new EL84 Amp
  241. 1955 Bogen J330 Mic Input Problem
  242. parallel el84 output pp. shared coupling caps?
  243. Will a Western Electric 422A substitute for a 5Y3?
  244. Question for a moderator
  245. bottlehead quickie schematic
  246. RCA 6146B sub for 807 or 6L6?
  247. Leak monoblock hum
  248. Eico 2036
  249. Heathkit iT-12 signal tracer to much gain??
  250. Valve Monoblocks - am I being realistic?

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