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  1. Evaluating Unknown Power Transformers
  2. 0v grid bias with UL connection?
  3. LV Filament supply quandry
  4. which tube using NonDirect heat with best-class sound ?
  5. Surround Decoder - Subtract amplifier
  6. New To Forum - First Post
  7. Try to understand
  8. tube site
  9. OTL with 6S19P?
  10. What should B+ on 300B push-pull be?
  11. Regulated PSU with EL84
  12. How do I design minimum current for 35W PP AMP
  13. Buying bits'n'bobs...
  14. Can't make this address work.....
  15. schematics for 6C33 single ended OTL?
  16. valve preamp
  17. trio W-38 problems
  18. Cheap Russian 2.2uF 400V PIO Capacitor
  19. Otl Se
  20. My 2A3 is being left behind
  21. Wal-Mart power supplies
  22. Nice deal!
  23. Look for high-voltage regulator projects
  24. Typical plate Voltage for el34
  25. Arc Sp8
  26. New Phono amp - developing stage
  27. CCS Bang for the buck output or driver?
  28. pentode driver sanity check - before i build
  29. 6av6 mini pre didn t work
  30. CCS in the output stage
  31. Looking for Schematic using KC3 Preamp ?
  32. If you are looking to try balanced AC power....
  33. The best Coupling cap (under $20)
  34. What makes a speaker "tube-friendly"?
  35. Using 6L6 for 300b driver
  36. Heater reference
  37. 6G15 output transformer selection
  38. Morgan Jones and cascodes
  39. 6A3/6B4G/6S4S(2A3/2S4S) project
  40. Question about changing a hybrid
  41. High-end Class A valve amplifiers will be illegal in USA?
  42. transformerless supply
  43. "Quasi" ultralinear experiment - questions...
  44. Help on a LUXMAN MQ 3600
  45. Changing from 6X4 to EZ81
  46. Design questions, driver stage for SE.
  47. S5 K-12G Question
  48. Ideas for a tube that heavily distorts ?
  49. CCS current sink in the output of my 2 tube 6080 amp.
  50. What do you think about my design (based on IMPAMP)
  51. Larger chassis Hole Punches
  52. Need help form Germany
  53. Output Impedance
  54. How to connect Gridchoke?
  55. Triode connecting a pentode?
  56. help on line pre-amp
  57. Edcor P-P Transformers
  58. chassis work in NYC area
  59. Please help ID this rectifier:
  60. Power Supply Voltage For 5881/6L6 Amp
  61. Audio Electronic Supply AE-25DJH
  62. Trouble: Main transfo short?
  63. help with chassis layout
  64. "Preamp" with remote (long)
  65. 6BY5 High Voltage & High Current Choke Input Design P.S.
  66. x-10 d and x-can version 2/3 schematics
  67. Ugly, but versatile, new amp
  68. Capacitor advice needed for AVA PAS rebuild
  69. Mic pre transformers
  70. Gain of JE labs 300B?
  71. Troubleshooting.
  72. new to the forum pre-amp
  73. Preamp output delay
  74. Super Triode Connection Amplifier Build with 6BM8 and 6AK5
  75. 1st project hum or buzz
  76. Impedans of trafo for EL504 inSE
  77. Can I use 2C39-B to sound
  78. usage of line out trans.
  79. eagle with tubes ?
  80. Rlim in GZ33 datasheet?
  81. LT1085 Current Regulation for DHT filaments
  82. Help Fixing Bias
  83. MC phono amp
  84. 10M45 Mu-Stage Idea?
  85. Hickok 6000A with 6C33 & 13E1...
  86. Isco 494
  87. looking for spice model of 6HA5 or similar tubes
  88. 6SL7 to 6SN7 substitution in power amp?
  89. Adding Subwoofer output to Aikido preamp circuit
  90. A request for PP 6c33c Schematics
  91. Thumping from left speaker when volume is low
  92. Crosstalk in twintriodes?
  93. Example Schematics?
  94. how to choose a rectifier tube? (specifically octals)
  95. Rather odd valve socket - anyone have any ideas?
  96. PS for GG - look for better channel separation
  97. help! T16 OTL schematic
  98. Bench PSU for tubes
  99. FM Stereo Tuner Tube Schematic ?
  100. Conn organ conversion to amp
  101. Smoking Transformer
  102. Questions on 1:1:1 driver transformer
  103. Pentode vrs Mosfet “MU-Stage”
  104. Transformer center tap connections
  105. dumb question :P KT88...
  106. Tube rectifier & regulator (modified)
  107. Some advice on this power supply
  108. Looking for Amperex C11550/1 data.
  109. Inserting tubes into Express PCB
  110. What do you think of this? (211 A2 SE)
  111. Help w/ diyAudio CCS implementation
  112. First DIY Amp Project
  113. HELP with PHONO and MIC preamps.
  114. CLC vs LCLC: is there any advantages other...
  115. Problem with old Heathkit
  116. Does anyone interested tube rectifier & regulator PCB ?
  117. Velleman K4040 conversion from EL34's to KT88's
  118. finished my PCC88 preamp
  119. Max 300B SE output possible with James 6123HS ?
  120. Who's right re bias adjustment versus plate voltage
  121. voltage current regulator
  122. Yarland 34 ciii amp
  123. CCS/5842/300B ground schematic.
  124. tube sockets
  125. PX25
  126. Research on tubes and circuits simple circuits
  127. using only 1/2 of a dual triode
  128. Some HMMM on my SRPP
  129. Grid Stopper
  130. diy tube amp problem
  131. The Red Light District - another PP EL84 amp
  132. Balanced 300B output for headphones or loudspeakers?
  133. 5692, the best?
  134. Power transformer quality differences
  135. Is it possible to use regulated DC for a rectifier tube?
  136. Transformer Secondary Power
  137. Phono preamp
  138. VR Tubes as Cathode Bias of 2A3 SRPP Loftin-White
  139. Physically small rectifier tube with 5V heaters
  140. Distorting 5687 preamp circuit
  141. Looking for a good 300B datasheet
  142. CCS is your friend!
  143. Valve Pre Amp & Class D Power Amp
  144. heater supply questions
  145. sub-mini valve
  146. Amp kit recommendations
  147. First amp for a new in valves
  148. Loud buzz and hum from one monoblock!!!
  149. Stueyh
  150. Big *** '50s Power Supply, now what? 300B SET ideas...
  151. Phono Preamp Design Needed
  152. Severe oscillation in 6L6 amp
  153. How to tweak warmth to a power amp?
  154. Can anyone explain me this Loftin White amp?
  155. Substituting dual triodes
  156. ValveWave-1 My first Tube Project
  157. changing output capacitor value? what should I consider?
  158. motor run caps in the output? good or bad idea?
  159. resistors across the heater voltage then the middle is grounded
  160. Switched Pot Source Needed
  161. transcendar transformer
  162. Installing tubes upside-down? Bad? Maybe it doesn't matter?
  163. Voltage Multipliers
  164. I want to build an AM Tube Tuner
  165. Tube Amp CCS?
  166. S-5 Electronics Tube Amp Kit
  167. Tube amps from eBay (China)
  168. filament supply: batteries v TentLabs?
  169. replace a 5651 tube with a zener?
  170. tube design books
  171. Bogen chb100 input conversion suggestions
  172. EL34 in place of a 6AS7G (used in the supply circuit as a pass tube). how?
  173. R-core xformers from China
  174. Counterpoint Service manual wanted
  175. Two chokes in one pot?
  176. help with a transformer
  177. 311T (211 alike) HIGH power triode
  178. Re-attaching anode cap to 805 or 811A tube
  179. "Fisher Doctor"
  180. Aikido + class D in the output stage
  181. tube-shop-com
  182. Ultrasonic heaters
  183. Grounding the Filament Winding
  184. Lundahl LL1680 for balanced output
  185. Website is back & new books posted
  186. strange tube G1 S/5
  187. First Tube Amp Needs an Overhaul
  188. pspice models for tubes
  189. Source for iron cores?
  190. Quad EL84 SE question
  191. Use of 12j1l and gu-50 tubes
  192. Shuguang 300B-98C
  193. Philips AG-9016 Upgrades???
  194. My DIY Pre-Amplifier used 5692 and 45 Tube with output transformer
  195. tube amp in a PCB with a toroidal xformer beside it?
  196. Need advice running 220v in USA
  197. Parallel-Push-Pull KT66 organ amp conversion ???
  198. new on tubes
  199. Balance 5687 pre-amp any advise??
  200. The Limitations of an EL34 in UL
  201. Source for tube bases....?
  202. 10Y, 26, 27 and 45: relative microphonics
  203. KT77 Mod Question/Idea/Punshishment
  204. KT88 SE with Edcor xfrmr
  205. Diy Distortion Pedal
  206. 45 fans – expanded horizons upstream?
  207. 12B4a Cathode Follower
  208. Hybrid voltage doubler using tube and diode
  209. Finally finished my first tube amp!
  210. advice on an EL84 Push pull Amp schematic
  211. Vintage radio
  212. Look for 12AU7 Preamp Circuit .
  213. PSU question? Going tube rectified
  214. PSU Rebuild Help Pleas
  215. Screeching tubes
  216. help in adjusting Vout in the power supply of the "Brute force in a line stage" by Er
  217. Fisher 800 restoration
  218. stern's ecl86 amp
  219. Look for Western Electric KS-16547-L1 circuit diagram
  220. Help about grommes 500C
  221. Dynaco MK III with 6146A tubes.
  222. Volume pot for Musical Fidelity F22 pre amp.
  223. Don't you just hate it when
  224. Bogen 8417 tube conversion..?
  225. How to Build Unbilical from PS to Phono
  226. Class A SET preamp, help
  227. Grounding MFA Luminescence
  228. custom transformer manufacturers (potted if possible)
  229. To Recap - A Question
  230. KT 44 anyone tried these
  231. unfamiliar tube brand
  232. power supply schematic with a 6080 used as a "pass tube"
  233. why so CHEAP!?
  234. Antique Electronic Supply
  235. Best Use For My Sansui Iron?
  236. Help on AMC CVT 3030
  237. Heathkit W-5M Red Plate Issue
  238. 1st Post (here) : ) My first project: Boozhound Amp
  239. regulated DC heater supply
  240. Help me pick up some good tubes! Urgent!
  241. CLCRC power supply config
  242. Choke Replacement Question.
  243. What tube instead of 7189
  244. Help on PP EL 34 from Claus Byrith
  245. Datasheet of PTT4 tube?
  246. ready to give up
  247. O-Ring sizes for Tube Dampers
  248. preamp /amp combination question
  249. Strange Transformer Question.....
  250. Audio Note M3/4/5/6/8 schematics

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