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  1. Russian 6CA4/EZ81 Equivalent?
  2. Amp build recomendation.. for Frazier model sevens
  3. How can I make a DIY AC probe for my DMM
  4. PSUDII Question
  5. EH KT88 Glowing Welds?
  6. Not quite DIY
  7. Searching for a TUBE datasheet GE GL-421
  8. 6EM7 Unit 1
  9. woohoo! RDH4!!!
  10. VTL hum
  11. Use CL-90 to slow 5Y3?
  12. Allen Wright, 1947-2011
  13. Octaves/Ghost notes from Bogen K10. Caps?
  14. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  15. What audio output xfmr for a 6BM8 pp amp?
  16. Parafeeding an EL84 SE(T)
  17. Interesting video from the production of KR tubes
  18. Gassy WE 300b
  19. Bogen Pa Identification 6l6 x 4 dual rectifier
  20. SE output transformer DIY
  21. Tektronix TDS714L or other Tek TDS series digital oscilloscope for stereo?
  22. AA 151 or Scott 222
  23. Toroidal Output Transformer
  24. Hytron HY615 Data ???
  25. Can I use a 12AX7 with CT 6.3V?
  26. torroidal power transformers
  27. What amp is this
  28. B+ ramping up before CCS filament - danger?
  29. Telefunken Magnetophon 85 --> EL95 Guitar amp
  30. Recommend a good plate choke for 26 tube!!
  31. S11E12 TUBES
  32. Low dropout 6.3v
  33. how to adjust the filament power ecc83
  34. Cary/AES - AE3 Linestage Help Needed !
  35. 5867a
  36. 6V6/12AX7 Project Question/Help
  37. Ultra Linear Push Pull Tube amp
  38. A little help with 6v6 screen needed.
  39. Output Transformers... Decisions Decisions
  40. Need Help. PSU not voltage down from design
  41. D/A preamp FFT measurements for review plz
  42. Type 40, 12A, 112A(syl)
  43. American Audio Picker
  44. one half of a tube in schematic????
  45. estimating power rating of Telefunken transformer
  46. Where is mistake??
  47. Building a 6s45P amp - transformer help
  48. High-End preamplifier with ECC82!
  49. Attempting to recap a couple of old Ampex 2010 suitcase amps
  50. Hi specs rectifier needed
  51. Lux 6056N Intertstage Transformer
  52. Aikido Line Stage / Buffer
  53. JJ KT88s and other octals
  54. Triodes from Russia
  55. Little help needed / do I have a bad tube or really good tube?
  56. 5.1 channel 807 SE amplifier
  57. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  58. Voltage multiplier vs transformer for preamp HV power supply
  59. does tube bias drift like silicon devices
  60. What are the best pots for less than $50 each?
  61. Best EL34 For Triode mode
  62. ASL AQ 1002 PP KT88 problem with input stage
  63. 2A3 Amp schematic suggestions?
  64. what I need for safe use mercury rectifier
  65. Anybody listened to Glow Audio?
  66. Tubes too close to output transformers?
  67. Help with stereo to mono for project
  68. MC3500 with 807 tubes and modern driver tubes
  69. Multiple Film Caps in parallel, Problems?
  70. I need a project......preferably a HIFI amp..........
  71. Aguilar DB-900 question
  72. REN904 for linestage?
  73. Urgent advice on Chinese purchase please!
  74. VR tubes, minimum current
  75. Senior Project Tube Preamp
  76. Antek AS-4T430 measurements
  77. small, light dc coupled 6ea7 amp sanity check
  78. 6S33S SE Transformer Set
  79. I think I blew my amp!! plase help
  80. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  81. testing 6550's on a Hickok 539b, same as KT88?
  82. 9V tube drive pedals - worth it?
  83. Music Angel XD-850MKIII 300b integrated amp
  84. 8150's
  85. More junk from China
  86. 6GM8 above 8mA/24V
  87. One Tube Sound Better Than Four?
  88. HK Citation V rebuild - any advice?
  89. 6GM8/ECC86
  90. Sound Valves vtp-101 Schematic
  91. ~17-18w sweep tube with large plate cap
  92. Fisher 500B Comparison
  93. New build of P-P PCL86 Amp
  94. Transformer question
  95. Can 110V Quad IIs be configured to 220V?
  96. Advice needed re repairing Audio Research VT100
  97. Yaqin SD-CD3 Tube Buffer - upgrading caps
  98. Best value speakers
  99. Peavey Windsor Studio The output tube El 34 burned out
  100. Gyrator PSU's in tube amps
  101. EL34 Amp Running KT66, Safe ?
  102. MJ Optimized Valve Regulator
  103. Need JAN 6418 tube stereo headphone preamp kit advice!
  104. Electronic choke
  105. Can you please help identifying this amp?
  106. [TubeAmp] Beginner's questions
  107. .47uF output cap to 1uF?
  108. Spark gaps on output transformers
  109. St 35 or St 70?
  110. Pi wound output transformers
  111. miniatures 6n1p 6n2p
  112. Begginer questions about a guitar pre amp
  113. HK Citation V schematic?
  114. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  115. Physical Oscillating noise from phono stage
  116. PP 6c33c-b
  117. Modifying the classic Williamson
  118. eimac 152TL and 304TL
  119. LTspice model for Dynaco A470 Output Transfomer
  120. audiodesignguide.com PP KT88
  121. One more 4P1L SE
  122. Mount rectifier above torroidal transformer?
  123. Extending Tube Sockets off a PCB
  124. EMG 200 tube tester
  125. Looking for a great starter stereo P-P amp
  126. Question regarding value of Telefunken tubes.
  127. Magic Eye tube
  128. Partridge Transformers
  129. 6CG7 replacing E88CC in SE KT88 Amp.
  130. Omit the filament windings -- LTM8033 from Linear
  131. Best position for bleeder resistor?
  132. anyone have experience with a Radio Craftsmen C400?
  133. Amp-A, a variation to the EL84 Push Pull theme
  134. tony's 6LU8 push-pull power amp build
  135. First Post Here
  136. MFA Lumi sings high-pitched tunes
  137. Power tubes not drawing current
  138. replacing tubes with circuitry
  139. High Voltage Regulators (Maida or zener)
  140. GU-81m tube amp schematics???
  141. Suggestions on SIPP driver stage
  142. How to eliminate the "white noise" for the 300B tube amp?
  143. 6BQ5 UL Curves?
  144. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  145. 6N1P and 6N6P OTL headphone amp
  146. New Project
  147. Understanding Steve Bench's regulated power supply
  148. Preamp with buffer design
  149. JP200 preamp?
  150. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  151. New Tube Manufacture?
  152. Lowering B+ in PS
  153. Rectifier tube blows
  154. direct coupling
  155. Need some help with these tubes
  156. Edcor GSXE10-8-5K primary Inductance?
  157. SE 2.5k secondary 2w guitar amp
  158. My "Red board" chassis
  159. PP EL34
  160. Building something better with a Chinese SE EL34B Amp DIY Kit
  161. Problem with my amp, and I have run out of ideas
  162. Value of coupling caps
  163. Testing 6BQ5 on Hickok I-177B
  164. Stepped Attenuator for AI Modulus IIA
  165. Tubes are beautifully colored....right?
  166. Differential Input for Aikido Amp?
  167. MY BEST OTL PREAMPLIFIER
  168. Valve testing machine
  169. Line stage with 12AU7 and 6CG7 anyone?
  170. Vibrating capacitor
  171. MingDa MC845-C or Opera COnsonance Reference 9.9
  172. Lower gain 12AX7?
  173. Needed: schematic for Ming Da MC34ab
  174. 12AX7 high gain guitar amp
  175. Solid State Cathodyne Phase Splitter Device?
  176. My Wave Isn't Square.
  177. 6J7 driver in WE91 like amplifier
  178. F2a - C3m Monkey
  179. balanced/unbalanced questions decision time
  180. Stern's saville double 6
  181. GM70 psu transformer.
  182. Antek toroidal vs Edcor?
  183. current production pentode, I_a ~ 8mA
  184. Brook 10c clone
  185. Unknown lamps need help
  186. What's wrong with this?
  187. Microphonics from C0G Caps across Heaters
  188. Yarland FV34CIII vs Synthesis Nimis
  189. 12AT7 and TDA1543...
  190. Eico Hf-81 Integrated Amplifier
  191. Tubed voltage regulator for KT88se amp, need help ?
  192. 1st post what can i build with this?
  193. CJ PV-3 voltage values for schematic
  194. How to analyze square waves?
  195. From KT90 to KT88
  196. side by side bifilar windings in excess of 1000 volts
  197. looking for a great tube amp book.
  198. Revox G36 Mod for preamp
  199. 33 in triode mode...any experience ?
  200. Help with Decware Zen EL84 SET
  201. Bumblebee Caps
  202. Find schematic of amplifier mcintosh mc 275 mkiv
  203. Heater wiring - Coaxial?
  204. now mono blocks!
  205. Heathkit AA-40 or AA-121
  206. UTC o-9 ouncers for headphone amp?
  207. Help modify 6H30 Mu-follower stage
  208. Help me to identify unknown tube
  209. Valve Compressor Circuit
  210. Should I rebuild my Eico 950 Cap Tester?
  211. Choke orientation (Need help)
  212. push pull 813 tube in ultra linear mode
  213. AD1865 DAC + 6SN7 analogue stage
  214. Inexpensive tube amplifier kits?
  215. SET amp/speaker issue.
  216. No pre-Amp - Pre Amp
  217. Found a CHEAP source of output transformers in Europe
  218. How calculate cathode LEDs biased
  219. ESR test for tube amps ?
  220. Anyone familiar with my 1975 Ampeg SVT
  221. asking help/knowledge asked: luxman d105u output stage
  222. Have you ever seen a 4 pin blue Alps pot??? need help
  223. Any ideas on this one???
  224. first 5f1 build is acting funny :/
  225. '57 twin question
  226. Why not 6C41C used in OTL??
  227. 6p14p(EL84) SE with 6n6p build jurnal
  228. Oscilloscope - Which one should I get ? What to look for?
  229. "Jonokuchi" - new desktop amp, or "Little red board"?
  230. Robust Driver stage recommendations
  231. Wireless World valve articles from the past
  232. Overshoot and Ringing
  233. B&K Tube Tester
  234. Harman Kardon A50K
  235. HiFi Tube amp project
  236. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  237. Tone control - good diagram needed
  238. Pentron tube microphone mixer/preamp
  239. Dolby AC3 coming on nicely.
  240. Power Supply Question
  241. Dynatuner FM-1 Restoration
  242. faulty audioromy 6550 no output and very faith sound please help
  243. just one tube preamp or driver
  244. Power triode preamp a different way
  245. 49.95 Tube amp?!
  246. Which cap for the Musical Machine?
  247. How much power do I need in the kitchen?
  248. 1Gohm or higher resistor ...
  249. Grounding check for SE 300B amp
  250. Suggest me a build for HD600 headphones

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