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  1. Questions on 1:1:1 driver transformer
  2. Pentode vrs Mosfet “MU-Stage”
  3. Transformer center tap connections
  4. dumb question :P KT88...
  5. Tube rectifier & regulator (modified)
  6. Some advice on this power supply
  7. Looking for Amperex C11550/1 data.
  8. Inserting tubes into Express PCB
  9. What do you think of this? (211 A2 SE)
  10. Help w/ diyAudio CCS implementation
  11. First DIY Amp Project
  12. HELP with PHONO and MIC preamps.
  13. CLC vs LCLC: is there any advantages other...
  14. Problem with old Heathkit
  15. Does anyone interested tube rectifier & regulator PCB ?
  16. Velleman K4040 conversion from EL34's to KT88's
  17. finished my PCC88 preamp
  18. Max 300B SE output possible with James 6123HS ?
  19. Who's right re bias adjustment versus plate voltage
  20. voltage current regulator
  21. Yarland 34 ciii amp
  22. CCS/5842/300B ground schematic.
  23. tube sockets
  24. PX25
  25. Research on tubes and circuits simple circuits
  26. using only 1/2 of a dual triode
  27. Some HMMM on my SRPP
  28. Grid Stopper
  29. diy tube amp problem
  30. The Red Light District - another PP EL84 amp
  31. Balanced 300B output for headphones or loudspeakers?
  32. 5692, the best?
  33. Power transformer quality differences
  34. Is it possible to use regulated DC for a rectifier tube?
  35. Transformer Secondary Power
  36. Phono preamp
  37. VR Tubes as Cathode Bias of 2A3 SRPP Loftin-White
  38. Physically small rectifier tube with 5V heaters
  39. Distorting 5687 preamp circuit
  40. Looking for a good 300B datasheet
  41. CCS is your friend!
  42. Valve Pre Amp & Class D Power Amp
  43. heater supply questions
  44. sub-mini valve
  45. Amp kit recommendations
  46. First amp for a new in valves
  47. Loud buzz and hum from one monoblock!!!
  48. Stueyh
  49. Big *** '50s Power Supply, now what? 300B SET ideas...
  50. Phono Preamp Design Needed
  51. antique fender bassman 50 retubed HELP
  52. Severe oscillation in 6L6 amp
  53. How to tweak warmth to a power amp?
  54. Can anyone explain me this Loftin White amp?
  55. Substituting dual triodes
  56. ValveWave-1 My first Tube Project
  57. changing output capacitor value? what should I consider?
  58. motor run caps in the output? good or bad idea?
  59. resistors across the heater voltage then the middle is grounded
  60. Switched Pot Source Needed
  61. transcendar transformer
  62. Installing tubes upside-down? Bad? Maybe it doesn't matter?
  63. Voltage Multipliers
  64. I want to build an AM Tube Tuner
  65. Tube Amp CCS?
  66. S-5 Electronics Tube Amp Kit
  67. Tube amps from eBay (China)
  68. filament supply: batteries v TentLabs?
  69. replace a 5651 tube with a zener?
  70. tube design books
  71. Bogen chb100 input conversion suggestions
  72. MesaBoogie 400+ clone
  73. EL34 in place of a 6AS7G (used in the supply circuit as a pass tube). how?
  74. R-core xformers from China
  75. Counterpoint Service manual wanted
  76. Two chokes in one pot?
  77. help with a transformer
  78. 311T (211 alike) HIGH power triode
  79. Re-attaching anode cap to 805 or 811A tube
  80. "Fisher Doctor"
  81. Aikido + class D in the output stage
  82. tube-shop-com
  83. Ultrasonic heaters
  84. Grounding the Filament Winding
  85. Lundahl LL1680 for balanced output
  86. Website is back & new books posted
  87. strange tube G1 S/5
  88. First Tube Amp Needs an Overhaul
  89. pspice models for tubes
  90. Source for iron cores?
  91. Quad EL84 SE question
  92. Use of 12j1l and gu-50 tubes
  93. Shuguang 300B-98C
  94. Philips AG-9016 Upgrades???
  95. My DIY Pre-Amplifier used 5692 and 45 Tube with output transformer
  96. tube amp in a PCB with a toroidal xformer beside it?
  97. Need advice running 220v in USA
  98. My Fender Princeton FD2 chasis (clone)
  99. Parallel-Push-Pull KT66 organ amp conversion ???
  100. new on tubes
  101. Balance 5687 pre-amp any advise??
  102. The Limitations of an EL34 in UL
  103. Source for tube bases....?
  104. 10Y, 26, 27 and 45: relative microphonics
  105. KT77 Mod Question/Idea/Punshishment
  106. KT88 SE with Edcor xfrmr
  107. Diy Distortion Pedal
  108. 45 fans – expanded horizons upstream?
  109. 12B4a Cathode Follower
  110. Hybrid voltage doubler using tube and diode
  111. Finally finished my first tube amp!
  112. advice on an EL84 Push pull Amp schematic
  113. Vintage radio
  114. Look for 12AU7 Preamp Circuit .
  115. PSU question? Going tube rectified
  116. PSU Rebuild Help Pleas
  117. Screeching tubes
  118. help in adjusting Vout in the power supply of the "Brute force in a line stage" by Er
  119. Fisher 800 restoration
  120. stern's ecl86 amp
  121. Look for Western Electric KS-16547-L1 circuit diagram
  122. Help about grommes 500C
  123. Dynaco MK III with 6146A tubes.
  124. Volume pot for Musical Fidelity F22 pre amp.
  125. Don't you just hate it when
  126. Bogen 8417 tube conversion..?
  127. How to Build Unbilical from PS to Phono
  128. Class A SET preamp, help
  129. Grounding MFA Luminescence
  130. custom transformer manufacturers (potted if possible)
  131. To Recap - A Question
  132. KT 44 anyone tried these
  133. Volts AC rating in power supply caps
  134. unfamiliar tube brand
  135. power supply schematic with a 6080 used as a "pass tube"
  136. Electro-Vox LA-210 Preamp; tube
  137. why so CHEAP!?
  138. Antique Electronic Supply
  139. Best Use For My Sansui Iron?
  140. Help on AMC CVT 3030
  141. Heathkit W-5M Red Plate Issue
  142. 1st Post (here) : ) My first project: Boozhound Amp
  143. regulated DC heater supply
  144. Help me pick up some good tubes! Urgent!
  145. CLCRC power supply config
  146. Choke Replacement Question.
  147. What tube instead of 7189
  148. Help on PP EL 34 from Claus Byrith
  149. Datasheet of PTT4 tube?
  150. ready to give up
  151. O-Ring sizes for Tube Dampers
  152. preamp /amp combination question
  153. Strange Transformer Question.....
  154. Audio Note M3/4/5/6/8 schematics
  155. Lundahl LL1540 for SY's heretical?
  156. Henrys
  157. 955 Acorn tubes
  158. Do you know these Ampex mono Amps
  159. Audio Research Resistor Type
  160. What's the best low wattage guitar amp?
  161. volume issues
  162. Need advice for best CCS
  163. confusion in the resistor/capacitor values and B+ supply for the aikido
  164. What are the diferences between these ways of output?
  165. PS for tube preamp
  166. what resistors are in the aikido signal path
  167. clarification of aikido heater supply
  168. Audio Note schematics
  169. Data for PE08/40
  170. PA-060 use
  171. Anode loaded 6080 giving less than unity gain, Why??
  172. Frustration with hum and noise in guitar tube amp
  173. 3/8in thick acrylic - would this make a good chassis?
  174. 6c19p Se?
  175. CF and SRPP in one circuit . .
  176. WE417/437 with battery or RC on cathode
  177. Building a Preamp:Dual Outputs Question
  178. Audio Note Conquest?
  179. metallized caps instead of electrolytics in a tube rectifier power supply?
  180. Power transformer as Parafeed output?
  181. Bogen amp
  182. Noob question about plate load
  183. adjusting gain?
  184. Lowering HT
  185. Kaneda hybrid preamp error ?
  186. Match priorities to schematic & toobs
  187. what do you think of this integrated?
  188. Modified Audio Note M7 Tube Pre Amplifier PCB
  189. lundahl xformers - are they potted?
  190. Beginner's very simple line pre-amp
  191. UX-226 Preamp
  192. Difference between microphones
  193. sv572-30, where to find
  194. E182CC - how to connect heater supply?
  195. Aikido pre tube for Minimum Gain
  196. 14gt8...clipping diodes?
  197. HPHV regulator
  198. Grounded Grid
  199. NYAL Super-It - removing volume pots, what resistor value to replace them?
  200. Another Bogen Conversion
  201. Trouble with my "new" PAS-3 Preamp
  202. Tubalizer, Monica
  203. musical angel modified marantz 7 preamp schematics
  204. Can anyone suggest the "best" 300B SE sound quality schematic for a beginner like me?
  205. Solder directly on tube?
  206. article in NY Times on Russian tubes
  207. Sovtek's sad tale
  208. audio research LS25 preamp
  209. Schematic needed PL519 Push-Pull Ultra-Linear amp
  210. Use 6C19 in a phono amp?
  211. 6L6 Push pull -- Power tranny question
  212. INPOL technology. Duh.
  213. Transformer problem
  214. Anyone tried a hi-voltage project as their first?
  215. Schematic needed PL519 Class A SE
  216. Giaime's new toy - aka the UniOctal
  217. Critique my circuit?
  218. New EC8010-VT52 Amp
  219. EL84/6BQ5 triode pp with no cathode biasing
  220. EL34 Push Pull in Class A
  221. In search of tube audiophile in Dhaka, Bangladesh
  222. Passive preamp with utc transformers
  223. RGN rectifiers in PSUD2...
  224. Power amp harmonics ?
  225. bypass tone controls on heathkit sp-2
  226. PS Caps
  227. Doubts on cathode stripping in tubes
  228. Edcor amplifier --> 6l6 PP
  229. Welborne labs phono stage needs help, got killed in power surge last night
  230. Huge OPT and small tubes
  231. UTC technology
  232. Luxman 38FD schematic
  233. EL84 PP Diy. Pls help me!!!
  234. Wurlitzer amplifier needs help
  235. Grounding case of 6J5
  236. Tube HW question from a software guy
  237. 12AU7 tube preamplifier schema
  238. "Improved RIAA by Jax"-Power supply help needed!!!
  239. OT Overload question
  240. V76
  241. Application of 6877 ?
  242. First nos tubes
  243. Looking for tube sockets
  244. Input transformers impedance questions
  245. Hybrid amp schema?
  246. Hybrid Cascode ?
  247. Interstage topology question
  248. raccomandation with valve amps
  249. Power Transformers in Output!
  250. How do I design "SCREEN GRID DRIVE"

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