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  1. Big Big hum ???
  2. 5687 filament heater question
  3. Anyone know agood MOSFET drive for RCA 811A Tube?
  4. Who is into musical instrument tube amplification?
  5. buffer stage ECC88 or ECC83?
  6. EL34 Integrated
  7. Solid state HT regulator??
  8. Tubes driving dipole mids
  9. How do I turn an high current signal into a line level signal??
  10. Peer review, UL question
  11. Grundig TK60 - Where is the Line Out ?
  12. 12AX7, EL34 or 6L6 design wanted
  13. RCA to Speakers?
  14. Morgan Jones - Valve books
  15. Any one tried to use subminiature for input tubes?
  16. Tube data for current manufacturers?
  17. Pentode to Triode Switch
  18. fried Heatkit IP-17 power supply
  19. Suggestions for Tube Amplifier
  20. SMPS for 300B heater ?
  21. What does this mean?
  22. heater/cathode query
  23. Bottlehead S.E.X Amp
  24. Old Meets New
  25. 6336-SE modification
  26. 6as7 pre-amp questions.
  27. Help in calculating NFB loop.
  28. ECL86 - quick and dirty
  29. Help! Q? about Ohm load in '59 Bassman RI
  30. preamp tubes change
  31. Parallel PP ECL86
  32. Anyone build a Minimal Reactance PSU?
  33. Transformer hook-up question to 115V AC line
  34. Langevin Schematic Archive
  35. PPP EL84 Amp
  36. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  37. Aikido: Width control
  38. Shielded Input Wire
  39. choke
  40. Multiple Inputs in One Shielded Cable?
  41. Presence control on a SE ?
  42. Question : pentode ccs schematic ?
  43. right capacitor value?
  44. Anybody knows this tube--WE 430C
  45. Transformer substitution help
  46. CFB Issues
  47. Please Suggest: Old Tube Usages
  48. Very powerful push/pull circuit
  49. Project choice for KT88
  50. Tamura F-475 in Parafeed?
  51. Kofi Annan in: "Push and Pull with Me"
  52. Schmitt dephaser
  53. Anyone using Chelmer Valves?
  54. SET w/ 300B Ultrapath + Parafeed Typologies
  55. a question about local feedback
  56. about input transformer
  57. Power transformer selection madness
  58. EF91 Line Stage questions
  59. Sourcing parts for Dynaco PAS rebuild
  60. HH Scott 223 monoblock schematics
  61. info needed on the 7c6 tube
  62. A final question on grounding(yeah right!)
  63. Schematics and Manuals Site Found
  64. Sprague/Cap Color Codes ?
  65. saba console radio working?
  66. Feedback and mu-followers
  67. Hundreds of 6AL5s
  68. Orange/Red Spot on The Anode of Sovtek 6L6GC
  69. Best way to isolate non-isolated RCAs?
  70. Power Resistor Smoking on HF-81
  71. Audio Innovations L-2
  72. first tube project
  73. And now a question about power switch...
  74. 2E24 ultralinear
  75. tube pin numbers
  76. Will This possibly work?
  77. What is the right current for a 300B at 400V and -80V grid bias?
  78. Simple Cap-Coupled CF Advise Needed
  79. tube amp layout reality check
  80. plitron
  81. How long does a 7199 last?
  82. Modding Tube Mixer Into DAW Front End
  83. CAE Cascode Diffamp Front End
  84. recommended resistor wattage
  85. 6.3V Rectifier Tube Lit by 5V
  86. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  87. WE121A, Please critique me
  88. Grommes / Western Electric G5M Tube Mixer Mods
  89. schemes needed
  90. PP to PPP
  91. aikido voltage swing
  92. voltage drop across a CCS...
  93. bogen db20 Schematic
  94. Mullards branded as Telefunkens???
  95. Pentodes; plate resistance; damping...
  96. PP amp has become SE?
  97. anyone mod a NYAL Moscode superIt?
  98. update to phillips sepp otl?
  99. DC filament supply LC or CL
  100. No Bass Control
  101. Unison Research Simply2 or s2schematics
  102. Border Patrol Power Supply
  103. Any leads on repairing a vintage Alamo Capri tube amp? >>
  104. nanocrystalline amorphous OPT
  105. El84 Pp
  106. Preamp, Euridice?
  107. Has anyone built a PS like this?
  108. Tube sockets in Eagle?
  109. E235L tubes
  110. Grid Input Transformers
  111. Aikido Power Supply
  112. ralph power pp amp with 807 ?
  113. fender clone, 6SJ7 vs. 6SN7
  114. tube stores in moscow
  115. 211 and 845
  116. Need help with amp
  117. Altec 1570B
  118. UL to triode
  119. How can I improve this tube amp (see pics)?
  120. klimo merlin preamp sch wanted
  121. CCS question
  122. *****es brew step 2 ... or grid bias ... how to?
  123. Filaments for the Aikido
  124. RE: RC-19 or RC-30
  125. My experience building a DRD d3A/300B amp
  126. TIP50 + LM317 High Voltage Regulator
  127. Any info on old "Cosmos" amp'?
  128. What more do I need to know?
  129. EBAY Find Of The Year Club LOL
  130. Partial feedback DHP SE amp
  131. newbie question
  132. Tube 1616
  133. Class A tube integrated circuit request
  134. Global Feedback Source Point
  135. These look interesting for that SE project
  136. Phillips AG9008 amp - looking for diagram
  137. 3cx3000
  138. EL86 and speakers? 800 Ohm
  139. Looking for CAT SL-1 Schematic
  140. el84 - 807 ?
  141. Low-voltage Tubebuffer by David Lin
  142. changing diodes with 5AR4 tubes
  143. 801 amp PS
  144. what can I do with these tubes?
  145. How to 'fine tune' your amps?
  146. Otl
  147. Rogers E40a schematic?
  148. Peavey Triple X Rewire! Help!
  149. Butler Monad A 100
  150. Using the UTC LS-33 as a Push-Pull output for 2A3's
  151. 2A3 AC filament hum
  152. A question about diodes...
  153. 5R4WGY/A/B , input filter capacitors
  154. attenuator hook up?
  155. best material for mounting tubes sideways
  156. Amp suggestions needed
  157. CC vs EI I mean toroids are out of question
  158. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  159. Inviting Comment on Schematic
  160. SE 2A3 input stage
  161. DIY Tube Amp Questions
  162. Need tube buffer circuit for sub-woofer out
  163. How to connect electrostatic shield of power transformer?
  164. Your favourite filament supply for DHT's?
  165. Quantum Impex
  166. Channel Switching Real McTube?
  167. so who owns a dac5 or m8 phono
  168. OPT at frequency extremes
  169. Parafeed with resistive load
  170. EL34 SE triode mode A class sch wanted
  171. Dumont (where theres smoke theres sound)
  172. HYBRID- Schematic
  173. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  174. sovtek 300B
  175. 12au6 preamp
  176. Engineering Drawings PCB Mount Tube Sockets
  177. Help with a choke for first-time DIY...
  178. Power SRPP
  179. Anode Loading Vs. Cathode Loading ?
  180. Purist 2 Line Amp
  181. Yet Another "EURIDICE" Pre Amp, 4CH This Time
  182. radio receiver
  183. Help Vintage Guitar Hummer
  184. Pioneer SM83 and 500k pot
  185. How many ways to connect a pentode...
  186. How do I go about repairing a vintage Pilotone AA-410A monoblock tube amp?
  187. Any pitfalls to tapping voltage doubler?
  188. 5k to 100 or so line transformers
  189. Ongaku 211 and Supravox 215
  190. Help with 6B4G PP amp.
  191. Help me build my Choke I/P preamp PSU
  192. Pinging "DoomPixie"
  193. 6L6 mono amp questions
  194. Help on 300B power trans...
  195. Spud Farmin' Pt. Deux
  196. No Zen
  197. Reuse or rewind choke
  198. Bell Sound Mono Integrated Amplifier
  199. Help with Melos SHA repair
  200. diy guitar tube amp help.
  201. Phase splitter transformers
  202. 6v6 schems
  203. Cathode feedback
  204. Is this a good choice for El34 PP
  205. 6DK6 amp schematics?
  206. so who here builds amps
  207. 3:1 Line Input X-former ?
  208. * 35 watt * 300B SE = super 300B + Class A2
  209. Quirk in Mullard 5-20 circuit
  210. LL1673 as anode load?
  211. preamp/power amp matching
  212. 0A3 and pentode questions (quickie)
  213. where to find transformer to use
  214. C core output design
  215. Unusual Motorola Console
  216. Improving the Aikido line stage...
  217. Poll..anyone interested in an Aikido linestage PCB group buy?
  218. New 6s45p compare to NOS?
  219. Elektra Print L-3500
  220. 300b tube cage
  221. The 'Tater Patch
  222. 2A3 Sovtek characteristics
  223. 300b filament q, yes another one.
  224. Amp repair help needed.
  225. 833a SE Peak A.F. Grid Voltage
  226. DHP driver for 845
  227. Fisher 55-a
  228. Ultralinear Miller capacitance
  229. Simplest OTL?
  230. presence control
  231. Black Gate N cathode formation voltage
  232. Any other reported fragility for 6H30pi?
  233. Help! circuit diagram
  234. Another Gm70 amp !!
  235. 833a Amp 75W SE
  236. Black Gate N-series question
  237. 300B+
  238. Koren's spice models
  239. 50 Power triode
  240. Vertical deflection tubes for audio output?
  241. warmth in different tube types
  242. OT data
  243. Sansui 1000A OPT's
  244. CF biasing and load ???s
  245. improving the Mcintosh C22
  246. An amp that melts 6L6s?
  247. 8ohm speaker on 15 or 3.5 ohm tranny
  248. Choosing a brand as a standard
  249. The power of transformation
  250. wanted- 845 pwr amp p.p.

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