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  1. Ming Da MC34B....passive or active pre amp?
  2. tube power supply upgrade... elna's, RTX, infinicap
  3. What tube do you think this OPT matches?
  4. safety fuse
  5. Short and sweet review of Sun Audio SV-300BE
  6. Help selecting a DIY schematic
  7. OP Transformer power rating guesstimate
  8. need a lot help on an el34 project :P
  9. Anode Follower
  10. CCS for tubes/valves: PCBs
  11. Improvement to DM's Generic Triode Model for 12AU7
  12. ccs, direct coupling and stuff
  13. Replica Pre QUAD 22 - Questions on mids
  14. Is this cap ok for audio?
  15. Remote Controlled Stepped Attenuator
  16. UltraLinear in toroidal parafeed, my findings.
  17. Help to tame a 12AX7/6AQ5 circuit
  18. DIY something like iMPAMP??
  19. Have you seen this tester?
  20. Help with taming a 12AX7 and 6AQ5a amp
  21. Linear Technology 1083CP adjusting problem
  22. radiation tubes
  23. 813 socket dimensions
  24. Cheap SE output transformers
  25. BIAS and B+ caps WKZ or NH
  26. Cleaning tubes...
  27. Manfred Huber
  28. IEC standards, anywhere?
  29. possible volume and balance control - does this look like it will work well?
  30. EL84 Amp - Baby Huey
  31. 6X4
  32. What do you guys use for HV toggles?
  33. Balanced Operation Output Transformer Questions from N00b
  34. Static stain cleaning
  35. 12AX7 preamp project
  36. SE 1.5W OTL
  37. Cross-coupled NFB for PP Pentode
  38. Parallel triodes - CONS?
  39. output transformer spec questions
  40. Choosing Valve
  41. opinions wanted - Lafayette Stereo 224 Tube Amp
  42. New KT77 Tubes by JJ
  43. 60HL5?
  44. Standby switch
  45. Problems With Simple Gounded Cathode Gain Stage
  46. srpp 6c33c
  47. Mullard 5-20/Maplin 4-20 modification to NON-Ultra Linear mode????
  48. Anyone in gta know their tubes?
  49. 801 low power SE amp
  50. superalloy ( 78% nickel/2%cobalt) EI-66 with Furukawa ultimate wire.
  51. OPT resistance for EL84 PP Class A
  52. Whats in this amplifier?
  53. Whose logo?
  54. pentode phase splitter
  55. Is this EL84M UL PP OK?
  56. Tube preamp question...also, chassis layout
  57. Quad II Mods/Tweeks
  58. Trying to recreate a Fisher SA-16
  59. CCS, how it actually works?
  60. 400V CRC PS, what do I do with it?
  61. Does anyone has MILBERT BAM230 TUBE CAR POWER AMPLIFIER
  62. Valve sockets
  63. Can I use 12AT7?
  64. Music Reference RM5 mkIII
  65. Help: Sun Audio Kits where from? EIFL, ELEX, Sun Audio?
  66. Looking for a link on power supply design
  67. Is feedback required for UL EL84PP?
  68. Someone working on an insane tube project?
  69. Load line frustration
  70. Is 12B4/A good for differential pair?
  71. Heretical Unity Gain line stage PLUS a little gain ?
  72. tube vibration
  73. Small temp voltage on phono input-problem?
  74. What's it all about?
  75. IXYS GaAs Schottky Diodes.
  76. Maplin 4-20
  77. Line preamp using 2 ECC88 per channel
  78. What to use as a nice amp case?
  79. Signal Tube Longevity ?!?
  80. HK 250 power amp tube amp schematic
  81. Need help with connecting OPT.
  82. 6SL7 driving SE EL34 ?
  83. power supply tranny
  84. Output Transformer Background
  85. Schematic
  86. no dc passing the opt
  87. New preamp schematics
  88. Transformer ID & Specs Sheet Help
  89. I Know Some Tube Flavors Are Worth More Than Others...
  90. Why hybrid CCS?
  91. Alembic F-2B
  92. Best cap to cathode tube bypass is ..
  93. Cheap el84 se
  94. Bridge rectifier with capacitors???
  95. 4 volt (dc?) heater from 6.3v
  96. Does anyone recognise this valve amp
  97. PS Capacitor Voltage Rating
  98. Which 6SN7 preamp should I build?
  99. Help on upgrading my Tube Preamp
  100. looking for a non-copyrighted preamp schematic
  101. Problems with cathodyne
  102. more gain needed -> how?
  103. OT: Tribute to Kondo-San
  104. PCL82 SE Tube Amplifier Kit
  105. Rectifier voltage difference, Why?
  106. partial feedback stuff
  107. replace 5y3
  108. Sparking Tubes!
  109. Transformer End Bells
  110. DHT Ultrapath Linestage schematic help
  111. Who manufactured are these EL34's?
  112. Tubes and RoHS compliance?
  113. What do you think about this tube preamp?
  114. What's Ra?
  115. Screen grid resistors
  116. Miller compensation - pros/cons?
  117. G. Kaufman's 6GV8/ECL85 regulated psu
  118. 6CA4/EZ81 heater bias
  119. First stab with PSD for 6CK4 amp-what have I got here?
  120. 81 Rectifier
  121. using 40 VDC supply?
  122. Choke current
  123. Why two diodes per branch on a full wave rectifier?
  124. Alps attenuators
  125. Seeking quality PP pre/mono power project (long)
  126. Transformer location
  127. proper choke placement
  128. 6HE5 as output pentode?
  129. A possible good source for steel chassis
  130. Update on DIY 7591 PP bias cap issue!
  131. 832, can you go SE with these?
  132. PX25 SE without NFB
  133. Change my 8417's Quicksilvers to this?
  134. SE EL84 circuit for bi-amp setup?
  135. CLCLC PSU for 6P14P-EV PP
  136. Shielding a Power Tranny
  137. Unison Research Schema Needed
  138. My 2A3 schematic, comments please.
  139. What happend to the PHOTO GALLERY ?
  140. Valve pre-amp maintenance and purchase
  141. sound of 45 v. 205d v. 2a3 v. 300b for headphones
  142. TPAD Devices Kit
  143. Need Help. Anyone with Philips AG 9016??
  144. Question about input sensitivity?
  145. Any help on sth probably simple?
  146. few questions about my amp, pls come in
  147. 7591 Spice Model ?...Anyone ?... I'm Groveling Over Here !
  148. Need regulated solid state PSU
  149. EC31 - Any Datasheet...?
  150. comments on www.shinrock.com???
  151. need schematic reading help
  152. Sound from dummy load?
  153. Loftin-White
  154. RCA 151 'scope
  155. Coupling cap. values???
  156. stepped attenuator
  157. Ideas for input/driver stage of 300B amp
  158. Schematics for Bogen MXM-A Mixer?
  159. yet another which cap is best for the money question
  160. Lowering the value of the lead resistor
  161. power supply recommendation for EL84 amp
  162. Can ECC40 be used in a phono stage?
  163. Better current source than LM317 on a 12B4 line amp
  164. Bias and max current for my 7591 AB amp...
  165. Making sense of the Aikido calculations?
  166. Computer Grade Capacitors
  167. Pls recommend a power amp to build?
  168. Advice about this 45 amp
  169. Any definitive infor on R-C parafeed out there?
  170. 6AS7 as rectifier tube?
  171. Pre Amps
  172. 12 volt preamp
  173. JE LAB's 2001 2A3 & Preamp???
  174. 12AX7WA
  175. found DIY amp - now what?
  176. Magic Eye spectrum analyzer
  177. Tube Companies
  178. B+ from GZ34 Heater CT ?
  179. Unknown mA on Gardners mains transformer
  180. PSU Question
  181. how to mount rca jacks and volume control in wood enclosure?
  182. Freaky Whistle in Guitar Amp
  183. Giaime's last nightmare - aka RIAA faceoff
  184. 5687 dc 5687 tube amp need help
  185. Input cap needed
  186. 6BQ5\EL84 line amp
  187. Capacitor Values Why so high? & What can I do?
  188. Bias pot question
  189. What I have: 4 Tubes. What I need...
  190. let me fix this bias
  191. A small no-fuss pentode/pentode SE amp
  192. Bleeder Resistor Placement
  193. Modifying Heathkit AA 151
  194. Interstage transformer for PI.
  195. Motorrun caps ... GND side?
  196. mono center channel out to stereo
  197. Audio Research REF 2 MkII
  198. 717a plate volts
  199. valve preamp criticisms?
  200. LOT of tubes. what can I do?
  201. substitution for 7355
  202. KT88 heaters
  203. Software for drawing tube schematics?
  204. Guitar Amp HUUUM with an MP3! Reverb Problem
  205. New books posted
  206. Compound bias
  207. Tube Oscillation or Microphonic Question
  208. WTB:OT for el 34 35 watt tube amplifier
  209. Questions on 6H30 simple PF?
  210. "Super Davohm" 1w .1% wirewound
  211. Heathkit AA-100
  212. 6159 for SE Power amp
  213. Do SMPS have a home at high end audio?
  214. Kofi Annan in: "300beee!" or "Kofi Gets a Toy"
  215. cathode capacitance on anode follower
  216. looking for a building shematic for ECLL800
  217. Iron learning.
  218. Tube Amp - Crackling Sound on Left Channel
  219. Pspice preamp simulation
  220. Supply voltage for 12v6 12B4 heaters
  221. Studio Tube Preamp
  222. New project and my first circuit...
  223. Champ clone fried my soundcard
  224. Choke coupled phase invertor
  225. long cable line drive
  226. What To Do?
  227. Simple Method To Measure Source Resistance?
  228. is this true????
  229. query on the PSU of a preamp
  230. Meshplate Help needed
  231. 6072 tube preamplifier.
  232. hybrid rectifiers and PIV rating
  233. transformerless amp help plz ...
  234. Help me build a tube MIC preamp plz
  235. chinese 845 amp blowing fuses
  236. Question about PIV rating of diodes...
  237. Triode strapped heptode?
  238. The Fisher 500C/800C Challenge (long..dialup warning)
  239. 5 wire output transformer
  240. Orcad & tube library
  241. Wall Wart Tube Power
  242. How can I lower B+ of power supply?
  243. How do you put a CCS under a diff. pair of DHTs???
  244. Just need to make sure.
  245. restoring a marantz 7c
  246. Who sells a tube bass guitar amp kit??
  247. What is Simplest and Best 6L6 PP circuit? (PK)
  248. Good DIY Transformer Article (in Thai)
  249. Tube Swapping Question
  250. Toroid choke question

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