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  1. Coupling cap. values???
  2. stepped attenuator
  3. Ideas for input/driver stage of 300B amp
  4. Schematics for Bogen MXM-A Mixer?
  5. yet another which cap is best for the money question
  6. Lowering the value of the lead resistor
  7. power supply recommendation for EL84 amp
  8. Can ECC40 be used in a phono stage?
  9. Better current source than LM317 on a 12B4 line amp
  10. Bias and max current for my 7591 AB amp...
  11. Making sense of the Aikido calculations?
  12. Computer Grade Capacitors
  13. Pls recommend a power amp to build?
  14. Advice about this 45 amp
  15. Any definitive infor on R-C parafeed out there?
  16. 6AS7 as rectifier tube?
  17. Pre Amps
  18. 12 volt preamp
  19. JE LAB's 2001 2A3 & Preamp???
  20. 12AX7WA
  21. found DIY amp - now what?
  22. Magic Eye spectrum analyzer
  23. Tube Companies
  24. B+ from GZ34 Heater CT ?
  25. Unknown mA on Gardners mains transformer
  26. PSU Question
  27. how to mount rca jacks and volume control in wood enclosure?
  28. Freaky Whistle in Guitar Amp
  29. Giaime's last nightmare - aka RIAA faceoff
  30. 5687 dc 5687 tube amp need help
  31. Input cap needed
  32. 6BQ5\EL84 line amp
  33. Capacitor Values Why so high? & What can I do?
  34. Bias pot question
  35. What I have: 4 Tubes. What I need...
  36. let me fix this bias
  37. A small no-fuss pentode/pentode SE amp
  38. Bleeder Resistor Placement
  39. Modifying Heathkit AA 151
  40. Interstage transformer for PI.
  41. Motorrun caps ... GND side?
  42. mono center channel out to stereo
  43. Audio Research REF 2 MkII
  44. 717a plate volts
  45. valve preamp criticisms?
  46. LOT of tubes. what can I do?
  47. substitution for 7355
  48. KT88 heaters
  49. Software for drawing tube schematics?
  50. Guitar Amp HUUUM with an MP3! Reverb Problem
  51. New books posted
  52. Compound bias
  53. Tube Oscillation or Microphonic Question
  54. WTB:OT for el 34 35 watt tube amplifier
  55. Questions on 6H30 simple PF?
  56. "Super Davohm" 1w .1% wirewound
  57. Heathkit AA-100
  58. 6159 for SE Power amp
  59. Do SMPS have a home at high end audio?
  60. Kofi Annan in: "300beee!" or "Kofi Gets a Toy"
  61. cathode capacitance on anode follower
  62. looking for a building shematic for ECLL800
  63. Iron learning.
  64. Tube Amp - Crackling Sound on Left Channel
  65. Pspice preamp simulation
  66. Supply voltage for 12v6 12B4 heaters
  67. Studio Tube Preamp
  68. New project and my first circuit...
  69. Champ clone fried my soundcard
  70. Choke coupled phase invertor
  71. long cable line drive
  72. What To Do?
  73. Simple Method To Measure Source Resistance?
  74. is this true????
  75. query on the PSU of a preamp
  76. Meshplate Help needed
  77. 6072 tube preamplifier.
  78. hybrid rectifiers and PIV rating
  79. transformerless amp help plz ...
  80. Help me build a tube MIC preamp plz
  81. chinese 845 amp blowing fuses
  82. Question about PIV rating of diodes...
  83. Triode strapped heptode?
  84. The Fisher 500C/800C Challenge (long..dialup warning)
  85. 5 wire output transformer
  86. Orcad & tube library
  87. Wall Wart Tube Power
  88. How can I lower B+ of power supply?
  89. How do you put a CCS under a diff. pair of DHTs???
  90. Just need to make sure.
  91. restoring a marantz 7c
  92. Who sells a tube bass guitar amp kit??
  93. What is Simplest and Best 6L6 PP circuit? (PK)
  94. Good DIY Transformer Article (in Thai)
  95. Tube Swapping Question
  96. Toroid choke question
  97. Pentode CCS for parafeed SEP??
  98. subminiature tube suggestion
  99. MQ431 or Triode's DynaClone
  100. Conrad Johnson MV 45 schematic help
  101. signal wiring
  102. NEW B Need Help on Output Tx Problem
  103. center tap of heater winding
  104. Dynaco Mk IV question
  105. Does this tube amp has enough cap
  106. Acrosound TO-330 output transformers
  107. PP transformer for SE use
  108. Holiday Time!
  109. another beginers first amp thread!
  110. Western Electric 374A
  111. Musen to Jikken 03/1997
  112. Please help me make a schematic
  113. Tips for Hakko 936-12
  114. AC or DC for 300b Heaters
  115. Two irons for PSU
  116. Which DHT for Line stage?
  117. Pye Mozart 10 amplifier
  118. I need a simple schematic with 6J1P tubes
  119. First tube project. Need advice.
  120. Sound Valves M-40 assistance
  121. Has anyone been keeping up on the 'New Sensor' Controversy?
  122. quad esl output transformer.
  123. penta labs?
  124. New Build (Guitar Amp)
  125. transformer links
  126. EL84 auto split
  127. TOPWARD MODEL 605 operation manual & Schematic
  128. PREdator, Diff/CF linestage.
  129. Triode Electronics ??
  130. Full Bridge Amp?
  131. Tube literature on pentodes + transformers
  132. so, who made General Motor's "AUTRONIC EYE" tubes?
  133. 6DJ8 Linestage
  134. Annyone seen this problem?
  135. psu to heater on 4 el34 tubes???
  136. 6C33C-B, Reliability--A theory........
  137. Sun Audio preamps
  138. Anyone Use A Harmon/Kardon XT-2 Xformer For MC ?
  139. Carver Phono
  140. Help With 3 Channel Magnavox
  141. simulation software
  142. trickle charge psu?
  143. tube filter
  144. Holiday S-5 K-12G
  145. Couple of (newbie) tube questions...
  146. valve buffer gainclone
  147. Series wiring for heaters
  148. DIY tube cd player ?
  149. Tubes in mp3 players?
  150. Output Impedance?
  151. Hum Pot Question
  152. Which 6AQ5
  153. White flakes in rectifier tube??
  154. Bogen V20 PA Amp Schematic or ?
  155. 12a?7 in Eico HF-12
  156. Home Made Tubes?? has anyone made one, is it possible??
  157. replace 6N1P with 7308
  158. Plate choke on a line stage?
  159. Looking for datasheet
  160. 811A SET Monoblock physical layout suggestions
  161. Automated bias
  162. OTL or parafeed?
  163. tubes: Jcm 900 Slx 50watt
  164. Reversing mains toroids for HT
  165. 5881/6L6WGC and 12AT7WA replacement
  166. Direction for Mounting Transformers
  167. Ecf80
  168. feedback phasing
  169. Cryotubes? Cryogenically Frozen valves
  170. European Triode Festival 2005
  171. PSU capacitors
  172. Question on shared rectifier / signal tube filament windings
  173. Heathkit rebuild or...?
  174. Fisher 500B OPT/Feedback Questions
  175. Transformer selection question
  176. Grounded Grid Help
  177. EF86 penthode
  178. Any audio use for ER21A?
  179. Upgrading a sonic frontiers SFS-80
  180. Hum problem
  181. low frequency oscillation in 12B4 linestage
  182. Balanced volume control question
  183. Need Help for Power Supply for gg Preamp
  184. OTL 6c33c Ciufolli v8.2 low voltage rails
  185. Any way to extend OPT low-frequency response?
  186. RCA Phono Stage Redux
  187. About tube codes
  188. More Joules? Tube or Solid State PSU?
  189. EL34 schematic confusion
  190. 2-stage DHT: high-mu vs. interstage stepup
  191. Understanding this power supply
  192. 6V6G recommended schematic
  193. parallel CRC Filtering for B+
  194. 6v6. 6lg Gain Max Voltage
  195. More buffer questions
  196. Benchtop PS
  197. Chassis labels
  198. LM317 Regulator Problem
  199. Can I afford my SE amp ??
  200. 12B4 versus 6S4 for linestage
  201. Function Generator Probe?
  202. Otl Set?
  203. Tektronix TDS2000 series is a noisy scope
  204. vanderveen's 30W PP amp..
  205. Roberts/Akai M series amp problems
  206. What speaker to use with my tube clone
  207. What’s the best tube amplifier you can build?
  208. Cathode Follower Buffer Input Impedance
  209. EL84 as Preamp and as Crossover
  210. Wondering if Upcoming DIY design will work with Tubes? Cheap DIY Kits?
  211. EL 84 Single Ended Integrated
  212. "2 Stage" PP 7591 Amp
  213. Jolida 1301a with Mission M71 speakers?
  214. EL34 SE in 430V?
  215. EL 84 PPP/PP Class A Triode schematic
  216. Almarro A318A
  217. beckman berkley model 7360
  218. spice model for UL output transformer?
  219. Need help with my new amp
  220. Motor caps
  221. E88CC Mullard fake
  222. Anyone try sharp cutoff pentodes in a p-p output stage?
  223. 845 A2 Monoblock Project
  224. newb needs help on simple el84 amp PS
  225. Newbie's power supply woes
  226. Question about M7 Preamp
  227. Which amp to DIY as a first project?
  228. help for psu
  229. tube amp
  230. Will a 6BH6 work in an Aikido?
  231. Tubes and maximum ratings
  232. FireFly Amp Question
  233. help needed 1st tube diy
  234. Help for newbie building Toccata preamp
  235. Diy Orange guitar amp
  236. Hybrid amp -> tube for VAS stage
  237. I recently inherited a Heathkit HO-10 monitor o-scope...
  238. Laney PA amp help!
  239. Aikido tube choice
  240. Biasing pre-amp problem
  241. Help with identifying tube
  242. Off Topic Holiday Cheer
  243. Prototype preamp example
  244. PV10AL Transformer burned, help!
  245. EL34 Pentode in Push-Pull!
  246. Mcintosh MX110 repair
  247. Mains Transformer Question
  248. Loaded Question
  249. A BIG SCRATCH in my speakers? Help me please.
  250. New Production Tung Sol 6550 Tubes - Opinions