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  1. Sound Valves vtp-101 Schematic
  2. ~17-18w sweep tube with large plate cap
  3. Fisher 500B Comparison
  4. New build of P-P PCL86 Amp
  5. Transformer question
  6. Can 110V Quad IIs be configured to 220V?
  7. Advice needed re repairing Audio Research VT100
  8. Yaqin SD-CD3 Tube Buffer - upgrading caps
  9. Best value speakers
  10. Peavey Windsor Studio The output tube El 34 burned out
  11. Gyrator PSU's in tube amps
  12. EL34 Amp Running KT66, Safe ?
  13. MJ Optimized Valve Regulator
  14. Need JAN 6418 tube stereo headphone preamp kit advice!
  15. Electronic choke
  16. Can you please help identifying this amp?
  17. [TubeAmp] Beginner's questions
  18. .47uF output cap to 1uF?
  19. Spark gaps on output transformers
  20. St 35 or St 70?
  21. Pi wound output transformers
  22. miniatures 6n1p 6n2p
  23. Begginer questions about a guitar pre amp
  24. HK Citation V schematic?
  25. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  26. Physical Oscillating noise from phono stage
  27. PP 6c33c-b
  28. Modifying the classic Williamson
  29. eimac 152TL and 304TL
  30. LTspice model for Dynaco A470 Output Transfomer
  31. audiodesignguide.com PP KT88
  32. One more 4P1L SE
  33. Mount rectifier above torroidal transformer?
  34. Extending Tube Sockets off a PCB
  35. EMG 200 tube tester
  36. Looking for a great starter stereo P-P amp
  37. Question regarding value of Telefunken tubes.
  38. Magic Eye tube
  39. Partridge Transformers
  40. 6CG7 replacing E88CC in SE KT88 Amp.
  41. Omit the filament windings -- LTM8033 from Linear
  42. Best position for bleeder resistor?
  43. anyone have experience with a Radio Craftsmen C400?
  44. Amp-A, a variation to the EL84 Push Pull theme
  45. tony's 6LU8 push-pull power amp build
  46. First Post Here
  47. MFA Lumi sings high-pitched tunes
  48. Power tubes not drawing current
  49. replacing tubes with circuitry
  50. High Voltage Regulators (Maida or zener)
  51. GU-81m tube amp schematics???
  52. Suggestions on SIPP driver stage
  53. How to eliminate the "white noise" for the 300B tube amp?
  54. 6BQ5 UL Curves?
  55. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  56. 6N1P and 6N6P OTL headphone amp
  57. New Project
  58. Understanding Steve Bench's regulated power supply
  59. Preamp with buffer design
  60. JP200 preamp?
  61. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  62. New Tube Manufacture?
  63. Lowering B+ in PS
  64. Rectifier tube blows
  65. direct coupling
  66. Need some help with these tubes
  67. Edcor GSXE10-8-5K primary Inductance?
  68. SE 2.5k secondary 2w guitar amp
  69. My "Red board" chassis
  70. PP EL34
  71. Building something better with a Chinese SE EL34B Amp DIY Kit
  72. Problem with my amp, and I have run out of ideas
  73. Value of coupling caps
  74. Testing 6BQ5 on Hickok I-177B
  75. Stepped Attenuator for AI Modulus IIA
  76. Tubes are beautifully colored....right?
  77. Differential Input for Aikido Amp?
  78. MY BEST OTL PREAMPLIFIER
  79. Valve testing machine
  80. Line stage with 12AU7 and 6CG7 anyone?
  81. Vibrating capacitor
  82. MingDa MC845-C or Opera COnsonance Reference 9.9
  83. Lower gain 12AX7?
  84. Needed: schematic for Ming Da MC34ab
  85. 12AX7 high gain guitar amp
  86. Solid State Cathodyne Phase Splitter Device?
  87. My Wave Isn't Square.
  88. 6J7 driver in WE91 like amplifier
  89. F2a - C3m Monkey
  90. balanced/unbalanced questions decision time
  91. Stern's saville double 6
  92. GM70 psu transformer.
  93. Antek toroidal vs Edcor?
  94. current production pentode, I_a ~ 8mA
  95. Brook 10c clone
  96. Unknown lamps need help
  97. What's wrong with this?
  98. Microphonics from C0G Caps across Heaters
  99. Yarland FV34CIII vs Synthesis Nimis
  100. 12AT7 and TDA1543...
  101. Eico Hf-81 Integrated Amplifier
  102. Tubed voltage regulator for KT88se amp, need help ?
  103. 1st post what can i build with this?
  104. CJ PV-3 voltage values for schematic
  105. How to analyze square waves?
  106. From KT90 to KT88
  107. side by side bifilar windings in excess of 1000 volts
  108. looking for a great tube amp book.
  109. Revox G36 Mod for preamp
  110. 33 in triode mode...any experience ?
  111. Help with Decware Zen EL84 SET
  112. Bumblebee Caps
  113. Find schematic of amplifier mcintosh mc 275 mkiv
  114. Heater wiring - Coaxial?
  115. now mono blocks!
  116. Heathkit AA-40 or AA-121
  117. UTC o-9 ouncers for headphone amp?
  118. Help modify 6H30 Mu-follower stage
  119. Help me to identify unknown tube
  120. Valve Compressor Circuit
  121. Should I rebuild my Eico 950 Cap Tester?
  122. Choke orientation (Need help)
  123. push pull 813 tube in ultra linear mode
  124. AD1865 DAC + 6SN7 analogue stage
  125. Inexpensive tube amplifier kits?
  126. SET amp/speaker issue.
  127. No pre-Amp - Pre Amp
  128. Found a CHEAP source of output transformers in Europe
  129. How calculate cathode LEDs biased
  130. ESR test for tube amps ?
  131. Anyone familiar with my 1975 Ampeg SVT
  132. asking help/knowledge asked: luxman d105u output stage
  133. Have you ever seen a 4 pin blue Alps pot??? need help
  134. Any ideas on this one???
  135. first 5f1 build is acting funny :/
  136. '57 twin question
  137. Why not 6C41C used in OTL??
  138. 6p14p(EL84) SE with 6n6p build jurnal
  139. Oscilloscope - Which one should I get ? What to look for?
  140. "Jonokuchi" - new desktop amp, or "Little red board"?
  141. Robust Driver stage recommendations
  142. Wireless World valve articles from the past
  143. Overshoot and Ringing
  144. B&K Tube Tester
  145. Harman Kardon A50K
  146. HiFi Tube amp project
  147. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  148. Tone control - good diagram needed
  149. Pentron tube microphone mixer/preamp
  150. Dolby AC3 coming on nicely.
  151. Power Supply Question
  152. Dynatuner FM-1 Restoration
  153. faulty audioromy 6550 no output and very faith sound please help
  154. just one tube preamp or driver
  155. Power triode preamp a different way
  156. 49.95 Tube amp?!
  157. Which cap for the Musical Machine?
  158. How much power do I need in the kitchen?
  159. 1Gohm or higher resistor ...
  160. Grounding check for SE 300B amp
  161. Suggest me a build for HD600 headphones
  162. 6BQ5 Screen Voltage Regulator
  163. 6SN7 Tubes
  164. My first tube Amplifier VT4C DIY record
  165. Amplifier output wattage test
  166. Troubble shooting help please.....
  167. Heater Wiring
  168. 220/110 step down in reverse ... and more
  169. Input Level Devil please help
  170. Soft start for a preamp?
  171. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  172. Using one KT77 and one EL34 per side?
  173. Help identifying transformer wires.
  174. tube pre and tube power amp
  175. Spice Models for Tubes w Screen Grid by Gurski
  176. Theremin project needs some help!
  177. Transformer abuse or other use
  178. aikido heater voltage
  179. HY51Z datasheet, help !!!
  180. 6L6 amp with unique phase splitter - check my math
  181. Dynaco A451 Output Transformer
  182. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  183. 6AU6 preamp problem
  184. Help identifying a Telefunken(?) tube...
  185. UCC85 and e-pay
  186. Lundahl LL1676 - missing data
  187. valve phono pre-amp HELP needed
  188. Preamp pcb
  189. ECL82 pp guitar amp project
  190. Strange Problem In Tube Amp Build
  191. Output transformer question
  192. Replacing ECL86/6GW8 to PCL86(14GW8)???
  193. On or Off?
  194. Neg-Feedback into Grid of gain stage instead of cathode?
  195. Accuphase F-25 Japanese manual translation help!
  196. Negative supply with CT tranny
  197. E130L SE again
  198. tony builds a 7N7 preamp
  199. Tango 10429 78% Nickle Output Transformer?
  200. Bias for Ipod Input
  201. What about this driver????
  202. allen organ amp 75
  203. Needs help Tubezone Poseidon
  204. Lightbulb trick on filament circuit?
  205. AMC CVT3030a Help for repair
  206. TF110-48/UL in the UK?
  207. hum in pas2
  208. Aikido Cathode Follwer Question
  209. 12AX7 tube preamplifier for bass guitar (Need help)
  210. Fuses...what's the deal?
  211. Question Regarding a Partial Feedback 807 SE
  212. Preamp issue on Fender Blues Jr.
  213. Leftover transformers
  214. Newbie "In Search of help"
  215. ELL80/ECLL800 Cathode follower
  216. The "Tube" bookshelf
  217. knight KG-240? low output help
  218. Reverb trouble-Schematic reading help needed
  219. Vacuum tube VCO
  220. JE lab 2a3 , fizzy, squeal in one channel, help
  221. Trouble with a DIY EL34 Tube Amp Kit
  222. SPICE Transformer Model Spreadsheet
  223. Choosing the right triode as a Phase Inverter
  224. toob noob with GE 5670 and I'd like to do something with it. Help?
  225. my first tube amp, no tubes...
  226. Enough heat to power my CD player...
  227. My first tube amp: 6C33C
  228. S5 16LS kit as a first DIY tube build?
  229. lady day we 91 psu mod help
  230. On days like these ...
  231. The Magnetron - A Low Noise, Long Life Amplifier????
  232. 6M11's
  233. DC coupled 300B idea - request for comments
  234. Fisher bias
  235. How does anode voltage swing to twice HT voltage?
  236. Can a 7625 Ceramic Planar Triode be soldered ?
  237. AMI "DD" Project: 6L6
  238. Plate loading questions
  239. EZ81 rectifier
  240. PY500a
  241. Tube Regulator Thoughts?
  242. Fully balanced from cartridge to loudspeaker - a little help needed!
  243. OPT on the speaker side?
  244. tube circuit conversions?
  245. Current inrush limiter suggestions
  246. Repair of Philips EL6416 amplifiers.
  247. GU-19 In priboi
  248. Duncan Amps PSU Designer II
  249. Troubleshoot help for vibrato type problem
  250. using existing pre with this circuit

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