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  1. What to make?
  2. LPT with low triodes?
  3. Ground questions
  4. Help! Upgrade a Music Angel KT88
  5. Need schematic for EL84 PSE
  6. Old OTL circuite question
  7. sub out in my 300b se? Help me please.
  8. Interstage OPT to drive 6V6 pp amplifier
  9. Voltage label on schematics...
  10. mystery purchase of the day
  11. What about the Eimac 3-500z?
  12. How much DC offset can a tube preamp take?
  13. Low voltage drop pass tube
  14. Convergent Legend Preamp
  15. vintage tube amp repair help
  16. Lasers, Tubes, and PCB
  17. 76 operating point/max plate rating?
  18. Mullard Made Tube Source Query
  19. SE Amp with NO HUM
  20. Frrank's 6Sn7 preamp...take out coupling cap??
  21. Need Schematic or help Newcomb AV-10 turntable tube amp
  22. Tube kits for beginners
  23. Lectron JH50 Tube Bias
  24. Tone circuit and other guitar amp Q's
  25. Removing LEDs from chinese amp
  26. Project madness
  27. chinese and tube Depot amps?
  28. eml 520 v2 info
  29. Gibson GA20 schematic needed
  30. Potted Transformer Enclosure Suppliers?
  31. Rogers Cadet III Phono Stage
  32. Modding Roberts/Akai mono block tube amps
  33. Full-wave bridge
  34. Output transformers and frequency response
  35. Class A2 SET using source follower driver
  36. Rectifier that drops lots of volts?
  37. switch snubber on preamp
  38. HV supply please comment before building
  39. This is cool
  40. Gold Lion KT88 Reissues
  41. 6F8G's any good?
  42. Matching capacitors
  43. Tung-Sol (new production) 6550s
  44. Curves, curves, and more curves
  45. Help for new design..
  46. OTL SE - Help Wanted with Idea
  47. OPTs causing crosstalk?
  48. KT88 Usable range
  49. How to change tubes ??? (NEWBIE)
  50. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  51. Need some help with potentiometer.
  52. Pinout of a UTC CG-422 power transformer
  53. Simple EL34 SET; advice?
  54. Popping Noise = Clipping ?
  55. PSU for an 813 SE
  56. Single Stage Line Amp (Diff Amp) Tube?
  57. EL 84 Edicron UK vs JJ
  58. calculating HF rolloff at 20kHz from input impedance
  59. Need info on RCA 813 used in Tube Amp
  60. Baby Huey: shunt feedback doesn't work to me
  61. Audio Innovations 800mkiii output trans needed
  62. High voltage psu
  63. First tubeamp, dont laugh too hard
  64. Newbie building d3A DRD 300B
  65. small practice amp with master volume
  66. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  67. gu81m
  68. 6sc7 vs. 6su7 in LTPI duty
  69. Cascode with ECC81(12AT7)=>Morgan Jones
  70. Where can I find these?
  71. Kofi Annan in: "Seven-Pound Mono Amp"
  72. Kofi Annan in: "Surf Bassin'"
  73. McIntosh Re-cap Questions
  74. 5881
  75. Cary Audio V12 - Schematic - Needed
  76. Anyone tried this method for OTL?
  77. Can't simulate 12AX7 with multisim 7
  78. new member, and some Electrohome PA100Mk1's
  79. Edcor Interstage for Phase Splitter?
  80. Why isodyne splitters not popular...
  81. Low Voltage phono stage for newbies
  82. 6EJ7 or 6EH7 triode strapped?
  83. New Guy
  84. Building a Fender 5E3 Deluxe from scratch.
  85. Counterpoint SA20 Mosfet output rail voltage
  86. Silly Chassis Punch Question...
  87. Tube Noob question
  88. tube shop in the uk
  89. Choke question
  90. Self Bias and Fixed Bias for Big Tubes?
  91. page tubelab.com
  92. Stromberg Carlson ASR433 Question
  93. CCS better in plate or cathode
  94. Audiophile term: "HIP test"
  95. Advice needed for tweaking S5 Electronics K-12G diy kit
  96. TV Damper Diodes
  97. 813 SE circuit,will it work?
  98. Looking for tube for application
  99. Finger joints vs. screw and glue
  100. 2C36 plate curve
  101. EL34 as preamp
  102. with DHT rectifiers, is the "+" side of the power supply...
  103. Paging Unison845
  104. Quad II - Forty
  105. my amplifiers
  106. Cheap spud amp
  107. Dr. Z "Route 66"
  108. Interesting 6L6GC Test Report
  109. 4D32 SE amplifier... help!
  110. 6AS7G with grid current?
  111. bypass switch for preamp
  112. Grounded Grid vs. Aikido
  113. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  114. Could this work? (PP amp with CCS)
  115. about newbies...and textbook..
  116. NFB capacitor to screen tap on ST-70 ?
  117. Aikido question
  118. Help with amp #2, 300B or 6550?
  119. Russian 807
  120. Searching Sound Valves M40 Monoblocks schematic
  121. Make: Bell P/A - Model: Carillon '35'
  122. Octal tubes for 7695-style matrix amp?
  123. SET recommendations
  124. Dynaco ST35
  125. Scott LK-72A is ALIVE
  126. 5687 as a single stage SE amp
  127. Changing two stereo amps into two monos
  128. UL Feedback Tap Calculation
  129. Precision Test Equipment tube tester
  130. Octal pentode sub for ef86?
  131. Help with guitar amp sound
  132. to mach1: tubecad regulator using tl431
  133. Thermal management: it this not really of concern?
  134. Signal phase shift through a tube amp
  135. Common-mode EI PS Chokes
  136. Signal pentode in current production
  137. Pentode vs Ultralinear
  138. Bogen CHA33/CHA33Y
  139. Sheet Metal Gauge
  140. Help with 6N6p
  141. Can anyone help, identifing selenium bridge hookup please.
  142. E182CC substitution ?
  143. Face Plate Printing and Silk Screening
  144. Funky reading 12B4A?
  145. Sovtek 5Y3 Issues
  146. from lilliput to gargantua (just for fun)
  147. Formula for calculating HT voltage?
  148. DIY Headamp for Sennheiser-650?
  149. Nuera Tube Amps
  150. Amplifier identification
  151. Perfect tube regulator
  152. Value of grid leak resistor
  153. Comments on this circuit
  154. Just grabbed this AF mesuring equipement, Any infos before restauration is Welcome
  155. Heater current monitoring...
  156. on-off switch position in PSU
  157. A better LDO heater regulator
  158. Guitar Head Amp Schematic
  159. any feedback on Russian gas regulators like SG4S and etc.?
  160. Some cathode follower questions
  161. rectifier voltage drop
  162. Anyone please explain"What is an A1,A2 in SE amp?
  163. Interesting link for guitar amps
  164. What is the correct plate voltage in this circuit?
  165. Any1 have an Osmond PCB library for tubes?
  166. best type cap for preamp PSU
  167. Steve Bench PP loadlines
  168. single Diode power supply?
  169. Spice Error
  170. Anyone have a Welborne Labs amp?
  171. Please help out a Noobie...
  172. wellborne labs
  173. best schematic designer for tubes?
  174. hum in 1 channel
  175. B+ time delay relay
  176. something is wrong with the shunt regulator
  177. Suggestions for a high end tube amp kit
  178. Conrad Johnson PV 7 problem
  179. Math to calc optimal voltage of tube dac to match amp input sensitivity?
  180. Power supply dilemma
  181. Transformer Placement 5E3
  182. Please help: no sound and blown fuse
  183. sparking Output transformer In Webcor 14x240 Amp
  184. Designing my very first tube amp...
  185. Diode bridge for Valve Buffered GC
  186. 6S41S (6C41C) Amplifier
  187. audio research sp11 upgrade help please
  188. The good, the bad, and the ugly OTL amplifiers
  189. Z2b tube rectifier
  190. Sparks inside GZ34
  191. Help with EV4417 6cm5/EL36
  192. Guitar Amps, Overdrive Pedals, and Space Charged Tubes
  193. My Cornet2 Tube Phono Preamp
  194. bright switch to bias circuit?
  195. Regulated AC...thought some of you might be interested
  196. Aikido PSU - integrated or standalone???
  197. Frank Philipse's tube site
  198. World' smallest GM-70 set
  199. Question on output hum on tube amp?
  200. Aikido Preamp
  201. Argh!!
  202. EL84 bias point
  203. Coupling cap rating
  204. Regulated power supply
  205. outstanding book??
  206. when the datasheet says "vertical mounting: up or down", does it mean...
  207. half wave rectifier will not saturate transformer core?
  208. Did I get in over my head too soon?!?
  209. Parallel output tubes
  210. Dropping filament volts/ L-W ramblings
  211. Rogers Cadet III Power problem ?
  212. about bi-cap
  213. HOT Iron ?
  214. how to set current in G Pimm's latest self-biasing CCS circuit?
  215. Low pass active tube crossover
  216. Ecological recycling amplifier (6CU6)
  217. Need ECF80 / 6BL8 tube spice 3f4 model
  218. Capacitor above chassis
  219. PS Help
  220. Bogen-Stein! mx60a mx-60a mo100a mo-100a
  221. Transmitter tubes
  222. Power Supply Construction
  223. what are the advantages of double core output transformers vs EI ?
  224. What is a reasonable amount ripple voltage for a 300B?
  225. "Old Like" sound transformer with a Tube !
  226. I coined the phrase HIGH VIVIDITY, to differentiate our amps from High Fidelity ones
  227. P-P resistance oddity
  228. Tube preamp vs. solid state
  229. 6l6 penthode triode
  230. Rising hum when turntable is plugged into preamp ??
  231. 6SL7 or 6SL7GT for broken Tubalizer
  232. Aikido PCB and AC filaments.
  233. Help with 300b proyect.
  234. 6P14P Amp Scratch Build
  235. 6GH8 - A Little Off?
  236. design and personality
  237. An all DHT push pull amp.
  238. Junk Pile Linestage
  239. need tube rectifier info
  240. Question on voltages
  241. How to change this design from penthode to triode or UL
  242. what glass-ware program?
  243. aikido 12b4 input 6sn7 output???
  244. GZ34 and temperature
  245. schematic search crate bv-60
  246. First Guitar Amp Help
  247. power supply for my single ended amp
  248. transmitter tube amp
  249. resistor and capacitor values for Aikido preamp
  250. need opinion on 2nd hand AF analyzers prices

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