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  1. tube id book
  2. radio , tv station and radar stations still use the best single end class a amplifier
  3. Stupid question?
  4. looking for ideas on a small tube amp stand?
  5. Cascode gain stage info?????
  6. hi gain preamp
  7. Tube flashing
  8. Bogen tube amp with variable Damping Factor
  9. Question re Allen Wright PP-1cs
  10. High Gain Preamp
  11. SACThailand
  12. You know you're a tube junky when...
  13. 6AU6 to do EF86 duty?
  14. 6Н28Б-В datasheet?
  15. Is single ended Class A better than push-pull?
  16. Is 845 better than 211 tube amplifier?
  17. Cool Fireworks (tubes are tough!)
  18. Big Big hum ???
  19. 5687 filament heater question
  20. Anyone know agood MOSFET drive for RCA 811A Tube?
  21. Who is into musical instrument tube amplification?
  22. buffer stage ECC88 or ECC83?
  23. EL34 Integrated
  24. Solid state HT regulator??
  25. Tubes driving dipole mids
  26. How do I turn an high current signal into a line level signal??
  27. Peer review, UL question
  28. Grundig TK60 - Where is the Line Out ?
  29. 12AX7, EL34 or 6L6 design wanted
  30. RCA to Speakers?
  31. Morgan Jones - Valve books
  32. Any one tried to use subminiature for input tubes?
  33. Tube data for current manufacturers?
  34. Pentode to Triode Switch
  35. fried Heatkit IP-17 power supply
  36. Suggestions for Tube Amplifier
  37. SMPS for 300B heater ?
  38. What does this mean?
  39. heater/cathode query
  40. Bottlehead S.E.X Amp
  41. Old Meets New
  42. 6336-SE modification
  43. 6as7 pre-amp questions.
  44. Help in calculating NFB loop.
  45. ECL86 - quick and dirty
  46. preamp tubes change
  47. Parallel PP ECL86
  48. Anyone build a Minimal Reactance PSU?
  49. Transformer hook-up question to 115V AC line
  50. Langevin Schematic Archive
  51. PPP EL84 Amp
  52. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  53. Aikido: Width control
  54. Shielded Input Wire
  55. choke
  56. Multiple Inputs in One Shielded Cable?
  57. Presence control on a SE ?
  58. Question : pentode ccs schematic ?
  59. right capacitor value?
  60. Anybody knows this tube--WE 430C
  61. Transformer substitution help
  62. CFB Issues
  63. Please Suggest: Old Tube Usages
  64. Very powerful push/pull circuit
  65. Project choice for KT88
  66. Tamura F-475 in Parafeed?
  67. Kofi Annan in: "Push and Pull with Me"
  68. Schmitt dephaser
  69. Anyone using Chelmer Valves?
  70. SET w/ 300B Ultrapath + Parafeed Typologies
  71. a question about local feedback
  72. about input transformer
  73. Power transformer selection madness
  74. EF91 Line Stage questions
  75. Sourcing parts for Dynaco PAS rebuild
  76. HH Scott 223 monoblock schematics
  77. info needed on the 7c6 tube
  78. A final question on grounding(yeah right!)
  79. Schematics and Manuals Site Found
  80. Sprague/Cap Color Codes ?
  81. saba console radio working?
  82. Feedback and mu-followers
  83. Hundreds of 6AL5s
  84. Orange/Red Spot on The Anode of Sovtek 6L6GC
  85. Best way to isolate non-isolated RCAs?
  86. Power Resistor Smoking on HF-81
  87. Audio Innovations L-2
  88. first tube project
  89. And now a question about power switch...
  90. 2E24 ultralinear
  91. tube pin numbers
  92. Will This possibly work?
  93. What is the right current for a 300B at 400V and -80V grid bias?
  94. Simple Cap-Coupled CF Advise Needed
  95. tube amp layout reality check
  96. plitron
  97. How long does a 7199 last?
  98. CAE Cascode Diffamp Front End
  99. 6.3V Rectifier Tube Lit by 5V
  100. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  101. WE121A, Please critique me
  102. Grommes / Western Electric G5M Tube Mixer Mods
  103. schemes needed
  104. PP to PPP
  105. aikido voltage swing
  106. voltage drop across a CCS...
  107. bogen db20 Schematic
  108. Mullards branded as Telefunkens???
  109. Pentodes; plate resistance; damping...
  110. PP amp has become SE?
  111. anyone mod a NYAL Moscode superIt?
  112. update to phillips sepp otl?
  113. DC filament supply LC or CL
  114. No Bass Control
  115. Unison Research Simply2 or s2schematics
  116. Border Patrol Power Supply
  117. Any leads on repairing a vintage Alamo Capri tube amp? >>
  118. nanocrystalline amorphous OPT
  119. El84 Pp
  120. Preamp, Euridice?
  121. Has anyone built a PS like this?
  122. Tube sockets in Eagle?
  123. E235L tubes
  124. Grid Input Transformers
  125. Aikido Power Supply
  126. ralph power pp amp with 807 ?
  127. tube stores in moscow
  128. 211 and 845
  129. Need help with amp
  130. Altec 1570B
  131. UL to triode
  132. How can I improve this tube amp (see pics)?
  133. klimo merlin preamp sch wanted
  134. CCS question
  135. *****es brew step 2 ... or grid bias ... how to?
  136. Filaments for the Aikido
  137. RE: RC-19 or RC-30
  138. My experience building a DRD d3A/300B amp
  139. TIP50 + LM317 High Voltage Regulator
  140. Any info on old "Cosmos" amp'?
  141. What more do I need to know?
  142. EBAY Find Of The Year Club LOL
  143. Partial feedback DHP SE amp
  144. newbie question
  145. Tube 1616
  146. Class A tube integrated circuit request
  147. Global Feedback Source Point
  148. These look interesting for that SE project
  149. Phillips AG9008 amp - looking for diagram
  150. 3cx3000
  151. EL86 and speakers? 800 Ohm
  152. Looking for CAT SL-1 Schematic
  153. el84 - 807 ?
  154. Low-voltage Tubebuffer by David Lin
  155. changing diodes with 5AR4 tubes
  156. 801 amp PS
  157. what can I do with these tubes?
  158. How to 'fine tune' your amps?
  159. Otl
  160. Rogers E40a schematic?
  161. Butler Monad A 100
  162. Using the UTC LS-33 as a Push-Pull output for 2A3's
  163. 2A3 AC filament hum
  164. A question about diodes...
  165. 5R4WGY/A/B , input filter capacitors
  166. attenuator hook up?
  167. best material for mounting tubes sideways
  168. Amp suggestions needed
  169. CC vs EI I mean toroids are out of question
  170. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  171. Inviting Comment on Schematic
  172. SE 2A3 input stage
  173. DIY Tube Amp Questions
  174. Need tube buffer circuit for sub-woofer out
  175. How to connect electrostatic shield of power transformer?
  176. Your favourite filament supply for DHT's?
  177. Quantum Impex
  178. Channel Switching Real McTube?
  179. so who owns a dac5 or m8 phono
  180. OPT at frequency extremes
  181. Parafeed with resistive load
  182. EL34 SE triode mode A class sch wanted
  183. Dumont (where theres smoke theres sound)
  184. HYBRID- Schematic
  185. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  186. sovtek 300B
  187. 12au6 preamp
  188. Engineering Drawings PCB Mount Tube Sockets
  189. Help with a choke for first-time DIY...
  190. Power SRPP
  191. Anode Loading Vs. Cathode Loading ?
  192. Purist 2 Line Amp
  193. Yet Another "EURIDICE" Pre Amp, 4CH This Time
  194. radio receiver
  195. Pioneer SM83 and 500k pot
  196. How many ways to connect a pentode...
  197. How do I go about repairing a vintage Pilotone AA-410A monoblock tube amp?
  198. Any pitfalls to tapping voltage doubler?
  199. 5k to 100 or so line transformers
  200. Ongaku 211 and Supravox 215
  201. Help with 6B4G PP amp.
  202. Help me build my Choke I/P preamp PSU
  203. Pinging "DoomPixie"
  204. 6L6 mono amp questions
  205. Help on 300B power trans...
  206. Spud Farmin' Pt. Deux
  207. No Zen
  208. Reuse or rewind choke
  209. Bell Sound Mono Integrated Amplifier
  210. Help with Melos SHA repair
  211. Phase splitter transformers
  212. 6v6 schems
  213. Cathode feedback
  214. Is this a good choice for El34 PP
  215. 6DK6 amp schematics?
  216. so who here builds amps
  217. 3:1 Line Input X-former ?
  218. * 35 watt * 300B SE = super 300B + Class A2
  219. Quirk in Mullard 5-20 circuit
  220. LL1673 as anode load?
  221. preamp/power amp matching
  222. 0A3 and pentode questions (quickie)
  223. where to find transformer to use
  224. C core output design
  225. Unusual Motorola Console
  226. Improving the Aikido line stage...
  227. Poll..anyone interested in an Aikido linestage PCB group buy?
  228. New 6s45p compare to NOS?
  229. Elektra Print L-3500
  230. 300b tube cage
  231. The 'Tater Patch
  232. 2A3 Sovtek characteristics
  233. 300b filament q, yes another one.
  234. Amp repair help needed.
  235. 833a SE Peak A.F. Grid Voltage
  236. DHP driver for 845
  237. Fisher 55-a
  238. Ultralinear Miller capacitance
  239. Simplest OTL?
  240. presence control
  241. Black Gate N cathode formation voltage
  242. Any other reported fragility for 6H30pi?
  243. Help! circuit diagram
  244. Another Gm70 amp !!
  245. 833a Amp 75W SE
  246. Black Gate N-series question
  247. 300B+
  248. Koren's spice models
  249. 50 Power triode
  250. Vertical deflection tubes for audio output?

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