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  1. mystery purchase of the day
  2. What about the Eimac 3-500z?
  3. How much DC offset can a tube preamp take?
  4. Low voltage drop pass tube
  5. Convergent Legend Preamp
  6. vintage tube amp repair help
  7. Lasers, Tubes, and PCB
  8. 76 operating point/max plate rating?
  9. Mullard Made Tube Source Query
  10. SE Amp with NO HUM
  11. Frrank's 6Sn7 preamp...take out coupling cap??
  12. Need Schematic or help Newcomb AV-10 turntable tube amp
  13. Tube kits for beginners
  14. Lectron JH50 Tube Bias
  15. Removing LEDs from chinese amp
  16. Project madness
  17. chinese and tube Depot amps?
  18. eml 520 v2 info
  19. Rogers Cadet III Phono Stage
  20. Modding Roberts/Akai mono block tube amps
  21. Full-wave bridge
  22. Output transformers and frequency response
  23. Class A2 SET using source follower driver
  24. Rectifier that drops lots of volts?
  25. switch snubber on preamp
  26. HV supply please comment before building
  27. This is cool
  28. Gold Lion KT88 Reissues
  29. 6F8G's any good?
  30. Tung-Sol (new production) 6550s
  31. Curves, curves, and more curves
  32. Help for new design..
  33. OTL SE - Help Wanted with Idea
  34. OPTs causing crosstalk?
  35. KT88 Usable range
  36. How to change tubes ??? (NEWBIE)
  37. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  38. Need some help with potentiometer.
  39. Pinout of a UTC CG-422 power transformer
  40. Simple EL34 SET; advice?
  41. Popping Noise = Clipping ?
  42. PSU for an 813 SE
  43. Single Stage Line Amp (Diff Amp) Tube?
  44. EL 84 Edicron UK vs JJ
  45. calculating HF rolloff at 20kHz from input impedance
  46. Need info on RCA 813 used in Tube Amp
  47. Baby Huey: shunt feedback doesn't work to me
  48. Audio Innovations 800mkiii output trans needed
  49. High voltage psu
  50. First tubeamp, dont laugh too hard
  51. Newbie building d3A DRD 300B
  52. small practice amp with master volume
  53. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  54. gu81m
  55. 6sc7 vs. 6su7 in LTPI duty
  56. Cascode with ECC81(12AT7)=>Morgan Jones
  57. Where can I find these?
  58. Kofi Annan in: "Seven-Pound Mono Amp"
  59. Kofi Annan in: "Surf Bassin'"
  60. McIntosh Re-cap Questions
  61. 5881
  62. Cary Audio V12 - Schematic - Needed
  63. Anyone tried this method for OTL?
  64. Can't simulate 12AX7 with multisim 7
  65. new member, and some Electrohome PA100Mk1's
  66. Edcor Interstage for Phase Splitter?
  67. Why isodyne splitters not popular...
  68. Low Voltage phono stage for newbies
  69. 6EJ7 or 6EH7 triode strapped?
  70. New Guy
  71. Counterpoint SA20 Mosfet output rail voltage
  72. Silly Chassis Punch Question...
  73. Tube Noob question
  74. tube shop in the uk
  75. Choke question
  76. Self Bias and Fixed Bias for Big Tubes?
  77. page tubelab.com
  78. Stromberg Carlson ASR433 Question
  79. CCS better in plate or cathode
  80. Audiophile term: "HIP test"
  81. Advice needed for tweaking S5 Electronics K-12G diy kit
  82. TV Damper Diodes
  83. 813 SE circuit,will it work?
  84. Looking for tube for application
  85. Finger joints vs. screw and glue
  86. 2C36 plate curve
  87. EL34 as preamp
  88. with DHT rectifiers, is the "+" side of the power supply...
  89. Paging Unison845
  90. Quad II - Forty
  91. my amplifiers
  92. Cheap spud amp
  93. Interesting 6L6GC Test Report
  94. 4D32 SE amplifier... help!
  95. 6AS7G with grid current?
  96. bypass switch for preamp
  97. Grounded Grid vs. Aikido
  98. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  99. Could this work? (PP amp with CCS)
  100. about newbies...and textbook..
  101. NFB capacitor to screen tap on ST-70 ?
  102. Aikido question
  103. Help with amp #2, 300B or 6550?
  104. Russian 807
  105. Searching Sound Valves M40 Monoblocks schematic
  106. Make: Bell P/A - Model: Carillon '35'
  107. Octal tubes for 7695-style matrix amp?
  108. SET recommendations
  109. Dynaco ST35
  110. Scott LK-72A is ALIVE
  111. 5687 as a single stage SE amp
  112. Changing two stereo amps into two monos
  113. UL Feedback Tap Calculation
  114. Precision Test Equipment tube tester
  115. Octal pentode sub for ef86?
  116. to mach1: tubecad regulator using tl431
  117. Thermal management: it this not really of concern?
  118. Signal phase shift through a tube amp
  119. Common-mode EI PS Chokes
  120. Signal pentode in current production
  121. Pentode vs Ultralinear
  122. Bogen CHA33/CHA33Y
  123. Sheet Metal Gauge
  124. Help with 6N6p
  125. Can anyone help, identifing selenium bridge hookup please.
  126. E182CC substitution ?
  127. Face Plate Printing and Silk Screening
  128. Funky reading 12B4A?
  129. Sovtek 5Y3 Issues
  130. from lilliput to gargantua (just for fun)
  131. Formula for calculating HT voltage?
  132. DIY Headamp for Sennheiser-650?
  133. Nuera Tube Amps
  134. Amplifier identification
  135. Perfect tube regulator
  136. Value of grid leak resistor
  137. Comments on this circuit
  138. Just grabbed this AF mesuring equipement, Any infos before restauration is Welcome
  139. Heater current monitoring...
  140. on-off switch position in PSU
  141. A better LDO heater regulator
  142. any feedback on Russian gas regulators like SG4S and etc.?
  143. Some cathode follower questions
  144. Anyone please explain"What is an A1,A2 in SE amp?
  145. What is the correct plate voltage in this circuit?
  146. Any1 have an Osmond PCB library for tubes?
  147. best type cap for preamp PSU
  148. Steve Bench PP loadlines
  149. Spice Error
  150. Anyone have a Welborne Labs amp?
  151. Please help out a Noobie...
  152. wellborne labs
  153. best schematic designer for tubes?
  154. hum in 1 channel
  155. B+ time delay relay
  156. something is wrong with the shunt regulator
  157. Suggestions for a high end tube amp kit
  158. Conrad Johnson PV 7 problem
  159. Math to calc optimal voltage of tube dac to match amp input sensitivity?
  160. Please help: no sound and blown fuse
  161. sparking Output transformer In Webcor 14x240 Amp
  162. Designing my very first tube amp...
  163. Diode bridge for Valve Buffered GC
  164. 6S41S (6C41C) Amplifier
  165. audio research sp11 upgrade help please
  166. The good, the bad, and the ugly OTL amplifiers
  167. Z2b tube rectifier
  168. Sparks inside GZ34
  169. Help with EV4417 6cm5/EL36
  170. My Cornet2 Tube Phono Preamp
  171. bright switch to bias circuit?
  172. Regulated AC...thought some of you might be interested
  173. Aikido PSU - integrated or standalone???
  174. Frank Philipse's tube site
  175. World' smallest GM-70 set
  176. Question on output hum on tube amp?
  177. Aikido Preamp
  178. Argh!!
  179. EL84 bias point
  180. Coupling cap rating
  181. outstanding book??
  182. when the datasheet says "vertical mounting: up or down", does it mean...
  183. Did I get in over my head too soon?!?
  184. Parallel output tubes
  185. Dropping filament volts/ L-W ramblings
  186. Rogers Cadet III Power problem ?
  187. about bi-cap
  188. HOT Iron ?
  189. how to set current in G Pimm's latest self-biasing CCS circuit?
  190. Low pass active tube crossover
  191. Ecological recycling amplifier (6CU6)
  192. Need ECF80 / 6BL8 tube spice 3f4 model
  193. Capacitor above chassis
  194. Bogen-Stein! mx60a mx-60a mo100a mo-100a
  195. Transmitter tubes
  196. what are the advantages of double core output transformers vs EI ?
  197. What is a reasonable amount ripple voltage for a 300B?
  198. "Old Like" sound transformer with a Tube !
  199. I coined the phrase HIGH VIVIDITY, to differentiate our amps from High Fidelity ones
  200. P-P resistance oddity
  201. Tube preamp vs. solid state
  202. 6l6 penthode triode
  203. Rising hum when turntable is plugged into preamp ??
  204. 6SL7 or 6SL7GT for broken Tubalizer
  205. Aikido PCB and AC filaments.
  206. Help with 300b proyect.
  207. 6P14P Amp Scratch Build
  208. 6GH8 - A Little Off?
  209. design and personality
  210. An all DHT push pull amp.
  211. Junk Pile Linestage
  212. need tube rectifier info
  213. Question on voltages
  214. How to change this design from penthode to triode or UL
  215. what glass-ware program?
  216. aikido 12b4 input 6sn7 output???
  217. GZ34 and temperature
  218. transmitter tube amp
  219. resistor and capacitor values for Aikido preamp
  220. need opinion on 2nd hand AF analyzers prices
  221. DH rectifier hookup.
  222. WE 310A vs. Russian 310A in WE91
  223. Question on the installation of LL1668 plate choke
  224. max plate voltage rating in tube datasheet
  225. choosing cap values for aikido
  226. Tubes in the Intermediate Stage
  227. c3m + 300b + miller capacitance
  228. How do I bias up a constant current series filament circuit?
  229. The perfect phono preamp.
  230. Got my 6BG6GA's last night
  231. Tubes4HiFi SP-6 preamp
  232. Shuguang 807s?
  233. LX-72A Sanity Check for Noooobie?
  234. Convert EL84 to 6V6? Anyone try this?
  235. PC96
  236. Ultrapath output transformers
  237. Grant RIAA phono with 12AX7/ECC83
  238. Ra-a??
  239. Help with my el509 amp almost done but with one problem.
  240. McIntosh chassis help needed
  241. Tube Voltage Regulator Design
  242. DC Tube Amplifiers
  243. Coupling cap voltage rating
  244. Anyone experienced in the 76 tube?
  245. aikido thump
  246. bypassing preamp board in integrated amp
  247. Mallory FP 2x30/500 for Scott LX-72 - NOOB
  248. is it really required to use carbon comp for grid stoppers?
  249. How much trickle current can fixed bias cathode batteries stand?
  250. LM329 as voltage reference in a CCS.

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