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

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