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  1. now mono blocks!
  2. Heathkit AA-40 or AA-121
  3. UTC o-9 ouncers for headphone amp?
  4. Help modify 6H30 Mu-follower stage
  5. Help me to identify unknown tube
  6. Valve Compressor Circuit
  7. Should I rebuild my Eico 950 Cap Tester?
  8. Choke orientation (Need help)
  9. push pull 813 tube in ultra linear mode
  10. AD1865 DAC + 6SN7 analogue stage
  11. Inexpensive tube amplifier kits?
  12. SET amp/speaker issue.
  13. No pre-Amp - Pre Amp
  14. Found a CHEAP source of output transformers in Europe
  15. How calculate cathode LEDs biased
  16. ESR test for tube amps ?
  17. Anyone familiar with my 1975 Ampeg SVT
  18. asking help/knowledge asked: luxman d105u output stage
  19. Have you ever seen a 4 pin blue Alps pot??? need help
  20. Any ideas on this one???
  21. first 5f1 build is acting funny :/
  22. '57 twin question
  23. Why not 6C41C used in OTL??
  24. 6p14p(EL84) SE with 6n6p build jurnal
  25. Oscilloscope - Which one should I get ? What to look for?
  26. "Jonokuchi" - new desktop amp, or "Little red board"?
  27. Robust Driver stage recommendations
  28. Wireless World valve articles from the past
  29. Overshoot and Ringing
  30. B&K Tube Tester
  31. Harman Kardon A50K
  32. HiFi Tube amp project
  33. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  34. Tone control - good diagram needed
  35. Pentron tube microphone mixer/preamp
  36. Dolby AC3 coming on nicely.
  37. Power Supply Question
  38. Dynatuner FM-1 Restoration
  39. faulty audioromy 6550 no output and very faith sound please help
  40. just one tube preamp or driver
  41. Power triode preamp a different way
  42. 49.95 Tube amp?!
  43. Which cap for the Musical Machine?
  44. How much power do I need in the kitchen?
  45. 1Gohm or higher resistor ...
  46. Grounding check for SE 300B amp
  47. Suggest me a build for HD600 headphones
  48. 6BQ5 Screen Voltage Regulator
  49. 6SN7 Tubes
  50. My first tube Amplifier VT4C DIY record
  51. Amplifier output wattage test
  52. Troubble shooting help please.....
  53. Heater Wiring
  54. 220/110 step down in reverse ... and more
  55. Input Level Devil please help
  56. Soft start for a preamp?
  57. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  58. Using one KT77 and one EL34 per side?
  59. Help identifying transformer wires.
  60. tube pre and tube power amp
  61. Spice Models for Tubes w Screen Grid by Gurski
  62. Theremin project needs some help!
  63. Transformer abuse or other use
  64. aikido heater voltage
  65. HY51Z datasheet, help !!!
  66. 6L6 amp with unique phase splitter - check my math
  67. Dynaco A451 Output Transformer
  68. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  69. 6AU6 preamp problem
  70. Help identifying a Telefunken(?) tube...
  71. UCC85 and e-pay
  72. Lundahl LL1676 - missing data
  73. valve phono pre-amp HELP needed
  74. Preamp pcb
  75. ECL82 pp guitar amp project
  76. Strange Problem In Tube Amp Build
  77. Output transformer question
  78. Replacing ECL86/6GW8 to PCL86(14GW8)???
  79. On or Off?
  80. Neg-Feedback into Grid of gain stage instead of cathode?
  81. Accuphase F-25 Japanese manual translation help!
  82. Negative supply with CT tranny
  83. E130L SE again
  84. tony builds a 7N7 preamp
  85. Tango 10429 78% Nickle Output Transformer?
  86. Bias for Ipod Input
  87. What about this driver????
  88. allen organ amp 75
  89. Needs help Tubezone Poseidon
  90. Lightbulb trick on filament circuit?
  91. AMC CVT3030a Help for repair
  92. TF110-48/UL in the UK?
  93. hum in pas2
  94. Aikido Cathode Follwer Question
  95. 12AX7 tube preamplifier for bass guitar (Need help)
  96. Fuses...what's the deal?
  97. Question Regarding a Partial Feedback 807 SE
  98. Preamp issue on Fender Blues Jr.
  99. Leftover transformers
  100. Newbie "In Search of help"
  101. ELL80/ECLL800 Cathode follower
  102. The "Tube" bookshelf
  103. knight KG-240? low output help
  104. Reverb trouble-Schematic reading help needed
  105. Vacuum tube VCO
  106. JE lab 2a3 , fizzy, squeal in one channel, help
  107. Trouble with a DIY EL34 Tube Amp Kit
  108. SPICE Transformer Model Spreadsheet
  109. Choosing the right triode as a Phase Inverter
  110. toob noob with GE 5670 and I'd like to do something with it. Help?
  111. my first tube amp, no tubes...
  112. Enough heat to power my CD player...
  113. My first tube amp: 6C33C
  114. S5 16LS kit as a first DIY tube build?
  115. lady day we 91 psu mod help
  116. On days like these ...
  117. The Magnetron - A Low Noise, Long Life Amplifier????
  118. 6M11's
  119. DC coupled 300B idea - request for comments
  120. Fisher bias
  121. How does anode voltage swing to twice HT voltage?
  122. Can a 7625 Ceramic Planar Triode be soldered ?
  123. AMI "DD" Project: 6L6
  124. Plate loading questions
  125. EZ81 rectifier
  126. PY500a
  127. Tube Regulator Thoughts?
  128. Fully balanced from cartridge to loudspeaker - a little help needed!
  129. OPT on the speaker side?
  130. tube circuit conversions?
  131. Current inrush limiter suggestions
  132. Repair of Philips EL6416 amplifiers.
  133. GU-19 In priboi
  134. Duncan Amps PSU Designer II
  135. Troubleshoot help for vibrato type problem
  136. using existing pre with this circuit
  137. Laney Tube Fusion 200 series 2 footswitch
  138. Antek AT-070L Specs
  139. Unused tube sections
  140. Rewire Rectifier Sockets for Tube Substitution
  141. Shuguang 300BC
  142. Sn/Pb S-Sn/Cu ...
  143. What and Where is BAF?
  144. CCS plate follower 12bh7 schematic needed pls
  145. 300B DC heaters confusion
  146. Blue Tube Red Plating = Help!
  147. Tube bass preamplifier power supply (Need Help)
  148. Opera Consonance M500 mkii
  149. 6AC7EH Better but different
  150. For that hard to find 5HY 2 amp choke...
  151. Cleaning up an old ST-70 chassis
  152. Accuphase P250 Amplifier Schematic Requred
  153. Pls Help me, this 6C33C pp Schematic is OK?
  154. Loud Noise due to NFB
  155. NAMM Zoo 2011
  156. Recommended O'Scope Reading?
  157. Damage to valve amp when powered up but disconnected to speakers?
  158. preferred resistor type
  159. use more then 'maximum capacitance' after tube rectifier
  160. Headphone Tube Amp D3a
  161. Dared 5.1 tube amp
  162. Designing Transformers with J.C.Maxwell
  163. Cathode resistor calc?
  164. Selector switch question
  165. good circuit to use with Grounded Grid Pre
  166. JJ KT88 tubes glowing bright yellow.
  167. Transistorised-Tubed-Magnetic Amplifier
  168. ST-35 Tube Brands
  169. Where you buy iron transformer core for DIY audio transformer
  170. Improve this SP-11 HV supply?
  171. More Antek Iron
  172. Edcor Transformer Specs
  173. Volume control resistance question? Step Attenuator?
  174. Minimum space between 6V6 tube in Push-Pull Amp
  175. GE Jan 6550a for SET amp?
  176. Chassis mount connector strip
  177. Transformer winding - mysterious!
  178. can anyone identify theses OT markings?
  179. Excessive hum with 1960's amp.
  180. Western Electric/Hickock 600A
  181. Pete Millett Uniamp
  182. cathode resistor sudden rising value on 7591
  183. 7591 cathode resistor unstable
  184. David
  185. Looking for a DHT Pre & Phono design / ideas please
  186. Hi, New member just bought k272a kit from Oatley
  187. Building an amp from scratch - what features would i want
  188. Lafayette LA215 voltage problem !
  189. 12ax7: How to maximize output?
  190. Low voltage tube pre-amp for T-amp
  191. Hybride bipolair amp
  192. Single end amp power supply upgrade
  193. Pentode curves - how to find operating point withoud going crazy?
  194. 6922 into 6H30 socket ?
  195. Headwize 6N1P OTL headphone amp having hum
  196. Need help to calculate R in a CCS!
  197. #40-LL1660-4*2A3
  198. Help with stereo tube amp design from parts
  199. Decoupling cap hum
  200. Plate chokes
  201. Tube output protection
  202. 12EN6 in triode mode...fine ???
  203. used 12at7
  204. Need advise with NFB loop
  205. 1964 Amplifier!!
  206. Very basic grid question????
  207. 12AX7 PULSE
  208. short article about operating points
  209. How is an amp's output measured?
  210. current/cathode feedback
  211. 6N23P, transistor PP hybrid amp project.
  212. Transformer choice for DC heater supply?
  213. Help me with i177 tubetester
  214. HeathKit Euw-15 Tube power Supply failure.
  215. Got unknown tube preamp board, need help!
  216. Ergo-Ella + Budget AVC Do-It-Box
  217. Phono pre amp question.
  218. Zener regulation for fixed-bias supply
  219. hot transformer
  220. H. H. Scott 299C output transformers
  221. decisions fostex and the DIY-K12G budget system..
  222. LTSpice GU19 GU29 6R3S
  223. power transfo as HT choke
  224. Dummy newb needs help with Bogen VP17X
  225. Modding the SAKUA AV200
  226. Anybody use 841s(VT-51)?
  227. Help me make use of these transformers
  228. Wiring Buck Transformer with GE transformer Help!
  229. audio research sp9
  230. WE417A Valve Preamplifier
  231. Hi-Fi Tube Amplifier and more
  232. Radford SC-22 Restoration - Input Transistor Biasing Question
  233. Tube Tester
  234. Looking for off-the-wall oil caps
  235. 805 MonoBlock SE Amp Kit?
  236. Back to back toroids
  237. 6AU6 in CCS circuits
  238. Morgan Jones' RIAA Pre-Amp
  239. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  240. Building an Aikido LV for a headphone amp
  241. What to do with a 6L6-GC?
  242. loose plate caps, hi temp glue???
  243. Power supply question
  244. RCA Line Input Shielding Technique Help
  245. Randall shutting down
  246. Grommes 260A DIY report, questions, suggestions
  247. Line out from tube organ
  248. Minimum Gain Stage Rg Value?
  249. One-half 6H30
  250. Novice In Over His Head

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