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  1. tubecad is back
  2. Happy birthday to tubes. Happy birthday to tubes. !
  3. Anyone used...gulp...kitparts.com?
  4. Grounding the Decware Se84sc
  5. Rogers Cadet III Schematics
  6. OTL amp help
  7. most simple design
  8. Please verify this circuit, is correct??
  9. EL509 vs EL519
  10. Heathkit AA-181 schematic needed
  11. EF 91 / Z77 Amp? help needed for newbie
  12. buzzing ST-70...plea for help
  13. Zen se-84cs question............
  14. Help with transformer
  15. 211 or EL34Triode?
  16. bootstrapping two SE transformers into a pp one?
  17. Gary Pimm's battery biased mosfet cccs
  18. PSU for SRPP - Voltage or Current Regulator?
  19. MC-30 rebuild, any ideas?
  20. ls-37 MM/MC RIAA Phono Amp from diyclub.biz
  21. Amorphous core transformers only work above 20KHz?
  22. Help with component layout?
  23. Output Transformer Sizing?
  24. PSU worries...
  25. 6BL7 as output tube for low power SE amp?
  26. advice for 6L6GC P-P amp
  27. need some info in a UTC s-16? anyone!
  28. 2A3 power supply transformer
  29. Hi-Bass button
  30. Searching for my first tube amp
  31. Which phono preamp ?
  32. potted transformers
  33. chokes and power supplies
  34. Heathkit A7 ?
  35. Best tweeter amp
  36. Should I use a cathode capacitor in my SE amp?
  37. Help, Just Starting Out
  38. JJ Tesla ECC99 spice model
  39. Newbie to tubes, what can they handle?
  40. Quicksilver rectifier
  41. SE amp question
  42. yaqin mc10k
  43. Hello again, plus a couple of Q`s.
  44. My first home audio amp.
  45. Boostrapping?
  46. KT88 budget- Sovtek, Valve Art, EH?
  47. looking for schematic with 6em7 as a driver or...
  48. Multi-Channel Contol Unit
  49. TAD-EL84-STR experience?
  50. OTL question
  51. Good SET for newbie
  52. 6n1p simpl(ish) design
  53. Short list of DIY tube amps with PCBs available...
  54. Parallel feed (choke load) in output stage
  55. Few general question for starter?
  56. winding a simple PP output transformer
  57. Cats prefer 12E1's
  58. Tube vicinity heat problems(maybe?)
  59. Help me design pre-amp PS
  60. Power Amplifier With EL 34
  61. psu design problem
  62. Anyone have info about Jukka Tolonen?
  63. What do you think about this hybrid amp?
  64. Power supplies in mic tube preamps
  65. Hammond 1629SE
  66. 41 Valve Amp? vs 45
  67. DeWald M-1200
  68. Pilot AA-903B Tube Amp
  69. MC225 schematic needed
  70. Can you make a +/- supply with valve rectification ?
  71. Audio Innovations Series 500 problems
  72. Big, Heavy, Tube regulated Lambda Power supply
  73. Audio Note DAC Output Transformer Hookup
  74. Got some tubes, help me properly evaluate them
  75. current flow, which direction?
  76. Tube flashes upon turn on, why?
  77. Odd hum problem
  78. DHT and resistors in parallel w/ heater
  79. Presenting the "Fartbottle" deluxe.
  80. amp mod
  81. Need info about rare Siemens Cf "post tube"
  82. Tube defect - What is the problem.
  83. el84 amp
  84. VIETA A-215 Schematics
  85. 6AR6/6098 ultralinear
  86. Tube kit for beginner
  87. earthing!!!!!!!!!!
  88. Heating only one half of a double triode
  89. Quick question regarding PSU Designer II
  90. calculate +B in EL34 SE triode conect
  91. Help with driver transformer
  92. Tube buffer for a cd player
  93. VSE riaa equalizer phono stage
  94. AC or DC Heater?
  95. looking for a good valve amp to fix
  96. Best operating point for 7044 and 5687
  97. S&B TX102 and preamplier stages
  98. I need help
  99. 6AS7 Mono Block's
  100. Filter/Regulator for B+ Supply
  101. Ecf 83
  102. cheap but good SET amplifier?
  103. DRD calculator
  104. Luxkit A1020 need help!!!
  105. Sophia Electric™ 300B 2.5V Mesh Plate Tubes
  106. benifits of auto bias
  107. KR Enterprice
  108. Preamp Boards From Hong Kong
  109. earthing
  110. Best sounding medium priced EL34 tube?
  111. 6CA5 Rectifier - B2Spice Model
  112. Help needed for a 6L6 Push pull amp
  113. constant current filament regs
  114. 6SN7 Basics (Newbie)
  115. Anyone tried the EH fat bottle 6CA7?
  116. TJ Tubes
  117. My tubes are going down. HELP !!!!
  118. Tino Zottola...where are you ?
  119. Lilliput amp
  120. filament rails
  121. Ss Diodes??
  122. Tube mic preamp
  123. CCS Filament Regulators for split filaments
  124. Quicksilver 8417 power supply caps?
  125. Audio Research LS7
  126. simple valve preamp
  127. valve preamp
  128. stand by switch or not?
  129. Omega Grand 6 and which amp?
  130. Line amp to speakers
  131. a bit more bass?
  132. Output transformer application help please.
  133. 5687 pre...some problems
  134. Recommendations needed for designs of PP pentode strapped as Triode
  135. KT88 push pull noob questions (sry)
  136. Need help identifying Stromberg Carlson Amp
  137. help needed diagnosing Grounded Grid power supply
  138. Building a tube Model????
  139. EL34 best for triode strapping ?
  140. Subwoofer amp
  141. Replacing Valves
  142. help me on 845 scheme....
  143. Help valve newb salvage some old TV tubes
  144. Cathode follower distortion results
  145. Bullet Proof 6L6GC Recommendation PLEASE
  146. newbie recomendations please
  147. NOS Tubes
  148. Audio Research CA-50 tube rolling
  149. OT on Decaware SE84C-S
  150. Change PP Amp Into Phono Pre?
  151. pl84 ore el84
  152. VTL Compact 100 Monoblock x 2.
  153. Battery bias a 6SU7 in the 300b billies
  154. Speaker impedance roughly 6 ohms, 2A3 SET...
  155. B2 Spice SE tranformer parameters
  156. Determining cap values (old radio)
  157. thoughts on 300b operating points with 3k output
  158. Grounded Grid wiring question
  159. PP-Triode , PP-UL , PP-Pentode-strapped-as-Triode
  160. Found some EC8010
  161. SE PX4 or PX25 amp, anyone built one????????
  162. HAL-O Damping Instruments
  163. An intriguing 6S45P direct coupled 300B amplifier
  164. difference between Cayin and Jolida
  165. 417a line preamp help
  166. kenwood trio el84 push pull schematic
  167. Any comments on this design?
  168. Amp for speaker testing
  169. Shielding preamp power supply
  170. Troubleshooting EL34 push pull amp
  171. amp input volume
  172. What Mullard 12AX7 is better?
  173. Universal audio / Avalon mic pre schematics
  174. Since transconductance amps has become so popular lately...
  175. Mecanical PSU hum
  176. help i.d. this amplifier
  177. Question about a hybrid PSU design
  178. 35Z5GT half-wave rectifier
  179. what rating for diode of 450Volts DC
  180. Telefunken 6L6GC ???????
  181. Why are my amps doing this?
  182. How to calculate the gain of an input-driver stage?
  183. 6L6 vs EL34
  184. protect your amps
  185. Snap Ring Octal Sockets
  186. Suitable operating point for 6SN7 as a differential driver ?
  187. Suitable rectifier
  188. 6N1P & SV83 mu stage driving 845?
  189. Has anyone built a transformer coupled preamp?
  190. Circuit diagram for RCA vintage 6BQ5 amplifier?
  191. Driver valve discussion
  192. Help to choose the tubes!
  193. Why hum in one channel only?
  194. DC heater noise WORSE than AC
  195. Rdh 4
  196. 900v B+ Silly time.
  197. tube rectifier arrangement
  198. Matrix Amp?
  199. Dynaco Stereo 70 amplifier
  200. Ultimate power switch?
  201. AC or DC current for 300B and 2A3 tube filaments ?
  202. 0.1uF @ 3000V Ceramic?
  203. Power Triodes in current production
  204. Anyone in the world identify eico trans?
  205. Mullard 5-20 in triode mode
  206. THX certification, or integrated near THX Quality,
  207. Feedback resistor on Baxandall tone stack?
  208. SE Pentode or PP Triode ?
  209. how does one "voice" a tube amp
  210. Musical fidelity Nu-Vista
  211. Tube substitutions in Heathkit W5M
  212. PSUD2 question
  213. 6L6 class A P-P CFB amp
  214. i have a matched pair of 3cx1000a7..
  215. Different silvering patterns on tube tops?
  216. Help with amp rebuild
  217. Mystery (to me) phase inverter?
  218. Biasing
  219. SE KT88 Amp
  220. Good design?
  221. Auto Biasing
  222. nuvistor MC step up
  223. Corian for tube amp?
  224. 6AQ5 Line stage?
  225. 6550 o/p stage
  226. Help with finding preamp schematic
  227. Any experience with this nice toroidal OT?
  228. 300B SE cathode feedback to grid?
  229. hummmmmmm?
  230. no bass makes pedro a whiny boy
  231. Iron, glass, sand and lead.
  232. Is this any good? Considerations
  233. 2A3 SET Output Transformer opinions/recommendations
  234. My 6C45 DC 6C41, advice wanted
  235. DIY valve
  236. A good SE project?
  237. who will build me this special "line tubeamp"
  238. PI filters
  239. Designing a simple dc filament supply?
  240. Rogers Cadett amp
  241. HI & a few words/questions ...
  242. 6d22s
  243. eBay
  244. Chassis layout for Stereo JE Labs 300BDX
  245. Output transformer help
  246. CAD Program for Tubes
  247. 801A/816 tubes wanted
  248. This little thing might save your life!
  249. What happens if I loose the cathode bias?
  250. beginners ecl82 power supply

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