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  1. estimating power rating of Telefunken transformer
  2. Where is mistake??
  3. Building a 6s45P amp - transformer help
  4. High-End preamplifier with ECC82!
  5. Attempting to recap a couple of old Ampex 2010 suitcase amps
  6. Hi specs rectifier needed
  7. Lux 6056N Intertstage Transformer
  8. Aikido Line Stage / Buffer
  9. JJ KT88s and other octals
  10. Triodes from Russia
  11. Little help needed / do I have a bad tube or really good tube?
  12. 5.1 channel 807 SE amplifier
  13. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  14. Voltage multiplier vs transformer for preamp HV power supply
  15. does tube bias drift like silicon devices
  16. What are the best pots for less than $50 each?
  17. Best EL34 For Triode mode
  18. ASL AQ 1002 PP KT88 problem with input stage
  19. 2A3 Amp schematic suggestions?
  20. what I need for safe use mercury rectifier
  21. Anybody listened to Glow Audio?
  22. Tubes too close to output transformers?
  23. Help with stereo to mono for project
  24. MC3500 with 807 tubes and modern driver tubes
  25. Multiple Film Caps in parallel, Problems?
  26. I need a project......preferably a HIFI amp..........
  27. Aguilar DB-900 question
  28. REN904 for linestage?
  29. Urgent advice on Chinese purchase please!
  30. VR tubes, minimum current
  31. Senior Project Tube Preamp
  32. Antek AS-4T430 measurements
  33. small, light dc coupled 6ea7 amp sanity check
  34. 6S33S SE Transformer Set
  35. I think I blew my amp!! plase help
  36. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  37. testing 6550's on a Hickok 539b, same as KT88?
  38. 9V tube drive pedals - worth it?
  39. Music Angel XD-850MKIII 300b integrated amp
  40. 8150's
  41. More junk from China
  42. 6GM8 above 8mA/24V
  43. One Tube Sound Better Than Four?
  44. HK Citation V rebuild - any advice?
  45. 6GM8/ECC86
  46. Sound Valves vtp-101 Schematic
  47. ~17-18w sweep tube with large plate cap
  48. Fisher 500B Comparison
  49. New build of P-P PCL86 Amp
  50. Transformer question
  51. Can 110V Quad IIs be configured to 220V?
  52. Advice needed re repairing Audio Research VT100
  53. Yaqin SD-CD3 Tube Buffer - upgrading caps
  54. Best value speakers
  55. Peavey Windsor Studio The output tube El 34 burned out
  56. Gyrator PSU's in tube amps
  57. EL34 Amp Running KT66, Safe ?
  58. MJ Optimized Valve Regulator
  59. Need JAN 6418 tube stereo headphone preamp kit advice!
  60. Electronic choke
  61. Can you please help identifying this amp?
  62. [TubeAmp] Beginner's questions
  63. .47uF output cap to 1uF?
  64. Spark gaps on output transformers
  65. St 35 or St 70?
  66. Pi wound output transformers
  67. miniatures 6n1p 6n2p
  68. Begginer questions about a guitar pre amp
  69. HK Citation V schematic?
  70. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  71. Physical Oscillating noise from phono stage
  72. PP 6c33c-b
  73. Modifying the classic Williamson
  74. eimac 152TL and 304TL
  75. LTspice model for Dynaco A470 Output Transfomer
  76. audiodesignguide.com PP KT88
  77. One more 4P1L SE
  78. Mount rectifier above torroidal transformer?
  79. Extending Tube Sockets off a PCB
  80. EMG 200 tube tester
  81. Looking for a great starter stereo P-P amp
  82. Question regarding value of Telefunken tubes.
  83. Magic Eye tube
  84. Partridge Transformers
  85. 6CG7 replacing E88CC in SE KT88 Amp.
  86. Omit the filament windings -- LTM8033 from Linear
  87. Best position for bleeder resistor?
  88. anyone have experience with a Radio Craftsmen C400?
  89. Amp-A, a variation to the EL84 Push Pull theme
  90. tony's 6LU8 push-pull power amp build
  91. First Post Here
  92. MFA Lumi sings high-pitched tunes
  93. Power tubes not drawing current
  94. replacing tubes with circuitry
  95. High Voltage Regulators (Maida or zener)
  96. GU-81m tube amp schematics???
  97. Suggestions on SIPP driver stage
  98. How to eliminate the "white noise" for the 300B tube amp?
  99. 6BQ5 UL Curves?
  100. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  101. 6N1P and 6N6P OTL headphone amp
  102. New Project
  103. Understanding Steve Bench's regulated power supply
  104. Preamp with buffer design
  105. JP200 preamp?
  106. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  107. New Tube Manufacture?
  108. Lowering B+ in PS
  109. Rectifier tube blows
  110. direct coupling
  111. Need some help with these tubes
  112. Edcor GSXE10-8-5K primary Inductance?
  113. SE 2.5k secondary 2w guitar amp
  114. My "Red board" chassis
  115. PP EL34
  116. Building something better with a Chinese SE EL34B Amp DIY Kit
  117. Problem with my amp, and I have run out of ideas
  118. Value of coupling caps
  119. Testing 6BQ5 on Hickok I-177B
  120. Stepped Attenuator for AI Modulus IIA
  121. Tubes are beautifully colored....right?
  122. Differential Input for Aikido Amp?
  123. MY BEST OTL PREAMPLIFIER
  124. Valve testing machine
  125. Line stage with 12AU7 and 6CG7 anyone?
  126. Vibrating capacitor
  127. MingDa MC845-C or Opera COnsonance Reference 9.9
  128. Lower gain 12AX7?
  129. Needed: schematic for Ming Da MC34ab
  130. 12AX7 high gain guitar amp
  131. Solid State Cathodyne Phase Splitter Device?
  132. My Wave Isn't Square.
  133. 6J7 driver in WE91 like amplifier
  134. F2a - C3m Monkey
  135. balanced/unbalanced questions decision time
  136. Stern's saville double 6
  137. GM70 psu transformer.
  138. Antek toroidal vs Edcor?
  139. current production pentode, I_a ~ 8mA
  140. Brook 10c clone
  141. Unknown lamps need help
  142. What's wrong with this?
  143. Microphonics from C0G Caps across Heaters
  144. Yarland FV34CIII vs Synthesis Nimis
  145. 12AT7 and TDA1543...
  146. Eico Hf-81 Integrated Amplifier
  147. Tubed voltage regulator for KT88se amp, need help ?
  148. 1st post what can i build with this?
  149. CJ PV-3 voltage values for schematic
  150. How to analyze square waves?
  151. From KT90 to KT88
  152. side by side bifilar windings in excess of 1000 volts
  153. looking for a great tube amp book.
  154. Revox G36 Mod for preamp
  155. 33 in triode mode...any experience ?
  156. Help with Decware Zen EL84 SET
  157. Bumblebee Caps
  158. Find schematic of amplifier mcintosh mc 275 mkiv
  159. Heater wiring - Coaxial?
  160. now mono blocks!
  161. Heathkit AA-40 or AA-121
  162. UTC o-9 ouncers for headphone amp?
  163. Help modify 6H30 Mu-follower stage
  164. Help me to identify unknown tube
  165. Valve Compressor Circuit
  166. Should I rebuild my Eico 950 Cap Tester?
  167. Choke orientation (Need help)
  168. push pull 813 tube in ultra linear mode
  169. AD1865 DAC + 6SN7 analogue stage
  170. Inexpensive tube amplifier kits?
  171. SET amp/speaker issue.
  172. No pre-Amp - Pre Amp
  173. Found a CHEAP source of output transformers in Europe
  174. How calculate cathode LEDs biased
  175. ESR test for tube amps ?
  176. Anyone familiar with my 1975 Ampeg SVT
  177. asking help/knowledge asked: luxman d105u output stage
  178. Have you ever seen a 4 pin blue Alps pot??? need help
  179. Any ideas on this one???
  180. first 5f1 build is acting funny :/
  181. '57 twin question
  182. Why not 6C41C used in OTL??
  183. 6p14p(EL84) SE with 6n6p build jurnal
  184. Oscilloscope - Which one should I get ? What to look for?
  185. "Jonokuchi" - new desktop amp, or "Little red board"?
  186. Robust Driver stage recommendations
  187. Wireless World valve articles from the past
  188. Overshoot and Ringing
  189. B&K Tube Tester
  190. Harman Kardon A50K
  191. HiFi Tube amp project
  192. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  193. Tone control - good diagram needed
  194. Pentron tube microphone mixer/preamp
  195. Dolby AC3 coming on nicely.
  196. Power Supply Question
  197. Dynatuner FM-1 Restoration
  198. faulty audioromy 6550 no output and very faith sound please help
  199. just one tube preamp or driver
  200. Power triode preamp a different way
  201. 49.95 Tube amp?!
  202. Which cap for the Musical Machine?
  203. How much power do I need in the kitchen?
  204. 1Gohm or higher resistor ...
  205. Grounding check for SE 300B amp
  206. Suggest me a build for HD600 headphones
  207. 6BQ5 Screen Voltage Regulator
  208. 6SN7 Tubes
  209. My first tube Amplifier VT4C DIY record
  210. Amplifier output wattage test
  211. Troubble shooting help please.....
  212. Heater Wiring
  213. 220/110 step down in reverse ... and more
  214. Input Level Devil please help
  215. Soft start for a preamp?
  216. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  217. Using one KT77 and one EL34 per side?
  218. Help identifying transformer wires.
  219. tube pre and tube power amp
  220. Spice Models for Tubes w Screen Grid by Gurski
  221. Theremin project needs some help!
  222. Transformer abuse or other use
  223. aikido heater voltage
  224. HY51Z datasheet, help !!!
  225. 6L6 amp with unique phase splitter - check my math
  226. Dynaco A451 Output Transformer
  227. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  228. 6AU6 preamp problem
  229. Help identifying a Telefunken(?) tube...
  230. UCC85 and e-pay
  231. Lundahl LL1676 - missing data
  232. valve phono pre-amp HELP needed
  233. Preamp pcb
  234. ECL82 pp guitar amp project
  235. Strange Problem In Tube Amp Build
  236. Output transformer question
  237. Replacing ECL86/6GW8 to PCL86(14GW8)???
  238. On or Off?
  239. Neg-Feedback into Grid of gain stage instead of cathode?
  240. Accuphase F-25 Japanese manual translation help!
  241. Negative supply with CT tranny
  242. E130L SE again
  243. tony builds a 7N7 preamp
  244. Tango 10429 78% Nickle Output Transformer?
  245. Bias for Ipod Input
  246. What about this driver????
  247. allen organ amp 75
  248. Needs help Tubezone Poseidon
  249. Lightbulb trick on filament circuit?
  250. AMC CVT3030a Help for repair

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