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  1. Bogen Pa Identification 6l6 x 4 dual rectifier
  2. SE output transformer DIY
  3. Tektronix TDS714L or other Tek TDS series digital oscilloscope for stereo?
  4. AA 151 or Scott 222
  5. Toroidal Output Transformer
  6. Hytron HY615 Data ???
  7. Can I use a 12AX7 with CT 6.3V?
  8. torroidal power transformers
  9. What amp is this
  10. B+ ramping up before CCS filament - danger?
  11. Telefunken Magnetophon 85 --> EL95 Guitar amp
  12. Recommend a good plate choke for 26 tube!!
  13. S11E12 TUBES
  14. Low dropout 6.3v
  15. how to adjust the filament power ecc83
  16. Cary/AES - AE3 Linestage Help Needed !
  17. 5867a
  18. 6V6/12AX7 Project Question/Help
  19. Ultra Linear Push Pull Tube amp
  20. A little help with 6v6 screen needed.
  21. Output Transformers... Decisions Decisions
  22. Need Help. PSU not voltage down from design
  23. D/A preamp FFT measurements for review plz
  24. Type 40, 12A, 112A(syl)
  25. American Audio Picker
  26. one half of a tube in schematic????
  27. estimating power rating of Telefunken transformer
  28. Where is mistake??
  29. Building a 6s45P amp - transformer help
  30. High-End preamplifier with ECC82!
  31. Attempting to recap a couple of old Ampex 2010 suitcase amps
  32. Hi specs rectifier needed
  33. Lux 6056N Intertstage Transformer
  34. Aikido Line Stage / Buffer
  35. JJ KT88s and other octals
  36. Triodes from Russia
  37. Little help needed / do I have a bad tube or really good tube?
  38. 5.1 channel 807 SE amplifier
  39. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  40. Voltage multiplier vs transformer for preamp HV power supply
  41. does tube bias drift like silicon devices
  42. What are the best pots for less than $50 each?
  43. Best EL34 For Triode mode
  44. ASL AQ 1002 PP KT88 problem with input stage
  45. 2A3 Amp schematic suggestions?
  46. what I need for safe use mercury rectifier
  47. Anybody listened to Glow Audio?
  48. Tubes too close to output transformers?
  49. Help with stereo to mono for project
  50. MC3500 with 807 tubes and modern driver tubes
  51. Multiple Film Caps in parallel, Problems?
  52. I need a project......preferably a HIFI amp..........
  53. Aguilar DB-900 question
  54. REN904 for linestage?
  55. Urgent advice on Chinese purchase please!
  56. VR tubes, minimum current
  57. Senior Project Tube Preamp
  58. Antek AS-4T430 measurements
  59. small, light dc coupled 6ea7 amp sanity check
  60. 6S33S SE Transformer Set
  61. I think I blew my amp!! plase help
  62. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  63. testing 6550's on a Hickok 539b, same as KT88?
  64. 9V tube drive pedals - worth it?
  65. Music Angel XD-850MKIII 300b integrated amp
  66. 8150's
  67. More junk from China
  68. 6GM8 above 8mA/24V
  69. One Tube Sound Better Than Four?
  70. HK Citation V rebuild - any advice?
  71. 6GM8/ECC86
  72. Sound Valves vtp-101 Schematic
  73. ~17-18w sweep tube with large plate cap
  74. Fisher 500B Comparison
  75. New build of P-P PCL86 Amp
  76. Transformer question
  77. Can 110V Quad IIs be configured to 220V?
  78. Advice needed re repairing Audio Research VT100
  79. Yaqin SD-CD3 Tube Buffer - upgrading caps
  80. Best value speakers
  81. Peavey Windsor Studio The output tube El 34 burned out
  82. Gyrator PSU's in tube amps
  83. EL34 Amp Running KT66, Safe ?
  84. MJ Optimized Valve Regulator
  85. Need JAN 6418 tube stereo headphone preamp kit advice!
  86. Electronic choke
  87. Can you please help identifying this amp?
  88. [TubeAmp] Beginner's questions
  89. .47uF output cap to 1uF?
  90. Spark gaps on output transformers
  91. St 35 or St 70?
  92. Pi wound output transformers
  93. miniatures 6n1p 6n2p
  94. Begginer questions about a guitar pre amp
  95. HK Citation V schematic?
  96. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  97. Physical Oscillating noise from phono stage
  98. PP 6c33c-b
  99. Modifying the classic Williamson
  100. eimac 152TL and 304TL
  101. LTspice model for Dynaco A470 Output Transfomer
  102. audiodesignguide.com PP KT88
  103. One more 4P1L SE
  104. Mount rectifier above torroidal transformer?
  105. Extending Tube Sockets off a PCB
  106. EMG 200 tube tester
  107. Looking for a great starter stereo P-P amp
  108. Question regarding value of Telefunken tubes.
  109. Magic Eye tube
  110. Partridge Transformers
  111. 6CG7 replacing E88CC in SE KT88 Amp.
  112. Omit the filament windings -- LTM8033 from Linear
  113. Best position for bleeder resistor?
  114. anyone have experience with a Radio Craftsmen C400?
  115. Amp-A, a variation to the EL84 Push Pull theme
  116. tony's 6LU8 push-pull power amp build
  117. First Post Here
  118. MFA Lumi sings high-pitched tunes
  119. Power tubes not drawing current
  120. replacing tubes with circuitry
  121. High Voltage Regulators (Maida or zener)
  122. GU-81m tube amp schematics???
  123. Suggestions on SIPP driver stage
  124. How to eliminate the "white noise" for the 300B tube amp?
  125. 6BQ5 UL Curves?
  126. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  127. 6N1P and 6N6P OTL headphone amp
  128. New Project
  129. Understanding Steve Bench's regulated power supply
  130. Preamp with buffer design
  131. JP200 preamp?
  132. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  133. New Tube Manufacture?
  134. Lowering B+ in PS
  135. Rectifier tube blows
  136. direct coupling
  137. Need some help with these tubes
  138. Edcor GSXE10-8-5K primary Inductance?
  139. SE 2.5k secondary 2w guitar amp
  140. My "Red board" chassis
  141. PP EL34
  142. Building something better with a Chinese SE EL34B Amp DIY Kit
  143. Problem with my amp, and I have run out of ideas
  144. Value of coupling caps
  145. Testing 6BQ5 on Hickok I-177B
  146. Stepped Attenuator for AI Modulus IIA
  147. Tubes are beautifully colored....right?
  148. Differential Input for Aikido Amp?
  149. MY BEST OTL PREAMPLIFIER
  150. Valve testing machine
  151. Line stage with 12AU7 and 6CG7 anyone?
  152. Vibrating capacitor
  153. MingDa MC845-C or Opera COnsonance Reference 9.9
  154. Lower gain 12AX7?
  155. Needed: schematic for Ming Da MC34ab
  156. 12AX7 high gain guitar amp
  157. Solid State Cathodyne Phase Splitter Device?
  158. My Wave Isn't Square.
  159. 6J7 driver in WE91 like amplifier
  160. F2a - C3m Monkey
  161. balanced/unbalanced questions decision time
  162. Stern's saville double 6
  163. GM70 psu transformer.
  164. Antek toroidal vs Edcor?
  165. current production pentode, I_a ~ 8mA
  166. Brook 10c clone
  167. Unknown lamps need help
  168. What's wrong with this?
  169. Microphonics from C0G Caps across Heaters
  170. Yarland FV34CIII vs Synthesis Nimis
  171. 12AT7 and TDA1543...
  172. Eico Hf-81 Integrated Amplifier
  173. Tubed voltage regulator for KT88se amp, need help ?
  174. 1st post what can i build with this?
  175. CJ PV-3 voltage values for schematic
  176. How to analyze square waves?
  177. From KT90 to KT88
  178. side by side bifilar windings in excess of 1000 volts
  179. looking for a great tube amp book.
  180. Revox G36 Mod for preamp
  181. 33 in triode mode...any experience ?
  182. Help with Decware Zen EL84 SET
  183. Bumblebee Caps
  184. Find schematic of amplifier mcintosh mc 275 mkiv
  185. Heater wiring - Coaxial?
  186. now mono blocks!
  187. Heathkit AA-40 or AA-121
  188. UTC o-9 ouncers for headphone amp?
  189. Help modify 6H30 Mu-follower stage
  190. Help me to identify unknown tube
  191. Valve Compressor Circuit
  192. Should I rebuild my Eico 950 Cap Tester?
  193. Choke orientation (Need help)
  194. push pull 813 tube in ultra linear mode
  195. AD1865 DAC + 6SN7 analogue stage
  196. Inexpensive tube amplifier kits?
  197. SET amp/speaker issue.
  198. No pre-Amp - Pre Amp
  199. Found a CHEAP source of output transformers in Europe
  200. How calculate cathode LEDs biased
  201. ESR test for tube amps ?
  202. Anyone familiar with my 1975 Ampeg SVT
  203. asking help/knowledge asked: luxman d105u output stage
  204. Have you ever seen a 4 pin blue Alps pot??? need help
  205. Any ideas on this one???
  206. first 5f1 build is acting funny :/
  207. '57 twin question
  208. Why not 6C41C used in OTL??
  209. 6p14p(EL84) SE with 6n6p build jurnal
  210. Oscilloscope - Which one should I get ? What to look for?
  211. "Jonokuchi" - new desktop amp, or "Little red board"?
  212. Robust Driver stage recommendations
  213. Wireless World valve articles from the past
  214. Overshoot and Ringing
  215. B&K Tube Tester
  216. Harman Kardon A50K
  217. HiFi Tube amp project
  218. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  219. Tone control - good diagram needed
  220. Pentron tube microphone mixer/preamp
  221. Dolby AC3 coming on nicely.
  222. Power Supply Question
  223. Dynatuner FM-1 Restoration
  224. faulty audioromy 6550 no output and very faith sound please help
  225. just one tube preamp or driver
  226. Power triode preamp a different way
  227. 49.95 Tube amp?!
  228. Which cap for the Musical Machine?
  229. How much power do I need in the kitchen?
  230. 1Gohm or higher resistor ...
  231. Grounding check for SE 300B amp
  232. Suggest me a build for HD600 headphones
  233. 6BQ5 Screen Voltage Regulator
  234. 6SN7 Tubes
  235. My first tube Amplifier VT4C DIY record
  236. Amplifier output wattage test
  237. Troubble shooting help please.....
  238. Heater Wiring
  239. 220/110 step down in reverse ... and more
  240. Input Level Devil please help
  241. Soft start for a preamp?
  242. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  243. Using one KT77 and one EL34 per side?
  244. Help identifying transformer wires.
  245. tube pre and tube power amp
  246. Spice Models for Tubes w Screen Grid by Gurski
  247. Theremin project needs some help!
  248. Transformer abuse or other use
  249. aikido heater voltage
  250. HY51Z datasheet, help !!!

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