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  1. 6Н28Б-В datasheet?
  2. Is single ended Class A better than push-pull?
  3. Is 845 better than 211 tube amplifier?
  4. Cool Fireworks (tubes are tough!)
  5. Big Big hum ???
  6. 5687 filament heater question
  7. Anyone know agood MOSFET drive for RCA 811A Tube?
  8. Who is into musical instrument tube amplification?
  9. buffer stage ECC88 or ECC83?
  10. EL34 Integrated
  11. Solid state HT regulator??
  12. Tubes driving dipole mids
  13. How do I turn an high current signal into a line level signal??
  14. Peer review, UL question
  15. Grundig TK60 - Where is the Line Out ?
  16. 12AX7, EL34 or 6L6 design wanted
  17. RCA to Speakers?
  18. Morgan Jones - Valve books
  19. Any one tried to use subminiature for input tubes?
  20. Tube data for current manufacturers?
  21. Pentode to Triode Switch
  22. fried Heatkit IP-17 power supply
  23. Suggestions for Tube Amplifier
  24. SMPS for 300B heater ?
  25. What does this mean?
  26. heater/cathode query
  27. Bottlehead S.E.X Amp
  28. Old Meets New
  29. 6336-SE modification
  30. 6as7 pre-amp questions.
  31. Help in calculating NFB loop.
  32. ECL86 - quick and dirty
  33. Help! Q? about Ohm load in '59 Bassman RI
  34. preamp tubes change
  35. Parallel PP ECL86
  36. Anyone build a Minimal Reactance PSU?
  37. Transformer hook-up question to 115V AC line
  38. Langevin Schematic Archive
  39. PPP EL84 Amp
  40. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  41. Aikido: Width control
  42. Shielded Input Wire
  43. choke
  44. Multiple Inputs in One Shielded Cable?
  45. Presence control on a SE ?
  46. Question : pentode ccs schematic ?
  47. right capacitor value?
  48. Anybody knows this tube--WE 430C
  49. Transformer substitution help
  50. CFB Issues
  51. Please Suggest: Old Tube Usages
  52. Very powerful push/pull circuit
  53. Project choice for KT88
  54. Tamura F-475 in Parafeed?
  55. Kofi Annan in: "Push and Pull with Me"
  56. Schmitt dephaser
  57. Anyone using Chelmer Valves?
  58. SET w/ 300B Ultrapath + Parafeed Typologies
  59. a question about local feedback
  60. about input transformer
  61. Power transformer selection madness
  62. EF91 Line Stage questions
  63. Sourcing parts for Dynaco PAS rebuild
  64. HH Scott 223 monoblock schematics
  65. info needed on the 7c6 tube
  66. A final question on grounding(yeah right!)
  67. Schematics and Manuals Site Found
  68. Sprague/Cap Color Codes ?
  69. saba console radio working?
  70. Feedback and mu-followers
  71. Hundreds of 6AL5s
  72. Orange/Red Spot on The Anode of Sovtek 6L6GC
  73. Best way to isolate non-isolated RCAs?
  74. Power Resistor Smoking on HF-81
  75. Audio Innovations L-2
  76. first tube project
  77. And now a question about power switch...
  78. 2E24 ultralinear
  79. tube pin numbers
  80. Will This possibly work?
  81. What is the right current for a 300B at 400V and -80V grid bias?
  82. Simple Cap-Coupled CF Advise Needed
  83. tube amp layout reality check
  84. plitron
  85. How long does a 7199 last?
  86. Modding Tube Mixer Into DAW Front End
  87. CAE Cascode Diffamp Front End
  88. recommended resistor wattage
  89. 6.3V Rectifier Tube Lit by 5V
  90. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  91. WE121A, Please critique me
  92. Grommes / Western Electric G5M Tube Mixer Mods
  93. schemes needed
  94. PP to PPP
  95. aikido voltage swing
  96. voltage drop across a CCS...
  97. bogen db20 Schematic
  98. Mullards branded as Telefunkens???
  99. Pentodes; plate resistance; damping...
  100. PP amp has become SE?
  101. anyone mod a NYAL Moscode superIt?
  102. update to phillips sepp otl?
  103. DC filament supply LC or CL
  104. No Bass Control
  105. Unison Research Simply2 or s2schematics
  106. Border Patrol Power Supply
  107. Any leads on repairing a vintage Alamo Capri tube amp? >>
  108. nanocrystalline amorphous OPT
  109. El84 Pp
  110. Preamp, Euridice?
  111. Has anyone built a PS like this?
  112. Tube sockets in Eagle?
  113. E235L tubes
  114. Grid Input Transformers
  115. Aikido Power Supply
  116. ralph power pp amp with 807 ?
  117. fender clone, 6SJ7 vs. 6SN7
  118. tube stores in moscow
  119. 211 and 845
  120. Need help with amp
  121. Altec 1570B
  122. UL to triode
  123. How can I improve this tube amp (see pics)?
  124. klimo merlin preamp sch wanted
  125. CCS question
  126. *****es brew step 2 ... or grid bias ... how to?
  127. Filaments for the Aikido
  128. RE: RC-19 or RC-30
  129. My experience building a DRD d3A/300B amp
  130. TIP50 + LM317 High Voltage Regulator
  131. Any info on old "Cosmos" amp'?
  132. What more do I need to know?
  133. EBAY Find Of The Year Club LOL
  134. Partial feedback DHP SE amp
  135. newbie question
  136. Tube 1616
  137. Class A tube integrated circuit request
  138. Global Feedback Source Point
  139. These look interesting for that SE project
  140. Phillips AG9008 amp - looking for diagram
  141. 3cx3000
  142. EL86 and speakers? 800 Ohm
  143. Looking for CAT SL-1 Schematic
  144. el84 - 807 ?
  145. Low-voltage Tubebuffer by David Lin
  146. changing diodes with 5AR4 tubes
  147. 801 amp PS
  148. what can I do with these tubes?
  149. How to 'fine tune' your amps?
  150. Otl
  151. Rogers E40a schematic?
  152. Peavey Triple X Rewire! Help!
  153. Butler Monad A 100
  154. Using the UTC LS-33 as a Push-Pull output for 2A3's
  155. 2A3 AC filament hum
  156. A question about diodes...
  157. 5R4WGY/A/B , input filter capacitors
  158. attenuator hook up?
  159. best material for mounting tubes sideways
  160. Amp suggestions needed
  161. CC vs EI I mean toroids are out of question
  162. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  163. Inviting Comment on Schematic
  164. SE 2A3 input stage
  165. DIY Tube Amp Questions
  166. Need tube buffer circuit for sub-woofer out
  167. How to connect electrostatic shield of power transformer?
  168. Your favourite filament supply for DHT's?
  169. Quantum Impex
  170. Channel Switching Real McTube?
  171. so who owns a dac5 or m8 phono
  172. OPT at frequency extremes
  173. Parafeed with resistive load
  174. EL34 SE triode mode A class sch wanted
  175. Dumont (where theres smoke theres sound)
  176. HYBRID- Schematic
  177. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  178. sovtek 300B
  179. 12au6 preamp
  180. Engineering Drawings PCB Mount Tube Sockets
  181. Help with a choke for first-time DIY...
  182. Power SRPP
  183. Anode Loading Vs. Cathode Loading ?
  184. Purist 2 Line Amp
  185. Yet Another "EURIDICE" Pre Amp, 4CH This Time
  186. radio receiver
  187. Help Vintage Guitar Hummer
  188. Pioneer SM83 and 500k pot
  189. How many ways to connect a pentode...
  190. How do I go about repairing a vintage Pilotone AA-410A monoblock tube amp?
  191. Any pitfalls to tapping voltage doubler?
  192. 5k to 100 or so line transformers
  193. Ongaku 211 and Supravox 215
  194. Help with 6B4G PP amp.
  195. Help me build my Choke I/P preamp PSU
  196. Pinging "DoomPixie"
  197. 6L6 mono amp questions
  198. Help on 300B power trans...
  199. Spud Farmin' Pt. Deux
  200. No Zen
  201. Reuse or rewind choke
  202. Bell Sound Mono Integrated Amplifier
  203. Help with Melos SHA repair
  204. diy guitar tube amp help.
  205. Phase splitter transformers
  206. 6v6 schems
  207. Cathode feedback
  208. Is this a good choice for El34 PP
  209. 6DK6 amp schematics?
  210. so who here builds amps
  211. 3:1 Line Input X-former ?
  212. * 35 watt * 300B SE = super 300B + Class A2
  213. Quirk in Mullard 5-20 circuit
  214. LL1673 as anode load?
  215. preamp/power amp matching
  216. 0A3 and pentode questions (quickie)
  217. where to find transformer to use
  218. C core output design
  219. Unusual Motorola Console
  220. Improving the Aikido line stage...
  221. Poll..anyone interested in an Aikido linestage PCB group buy?
  222. New 6s45p compare to NOS?
  223. Elektra Print L-3500
  224. 300b tube cage
  225. The 'Tater Patch
  226. 2A3 Sovtek characteristics
  227. 300b filament q, yes another one.
  228. Amp repair help needed.
  229. 833a SE Peak A.F. Grid Voltage
  230. DHP driver for 845
  231. Fisher 55-a
  232. Ultralinear Miller capacitance
  233. Simplest OTL?
  234. presence control
  235. Black Gate N cathode formation voltage
  236. Any other reported fragility for 6H30pi?
  237. Help! circuit diagram
  238. Another Gm70 amp !!
  239. 833a Amp 75W SE
  240. Black Gate N-series question
  241. 300B+
  242. Koren's spice models
  243. 50 Power triode
  244. Vertical deflection tubes for audio output?
  245. warmth in different tube types
  246. OT data
  247. Sansui 1000A OPT's
  248. CF biasing and load ???s
  249. improving the Mcintosh C22
  250. An amp that melts 6L6s?

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