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  1. Tubes: Are they worth it?
  2. Radio Shack Boston Monobloc (fuse question)
  3. 829B 3E29 Pentode PPP?
  4. Fixed Autobias?
  5. Best wishes
  6. Radiotron A504 amplifier schematic
  7. Blown power tube - a short story
  8. Hickok 752A calibration?
  9. replace EL34 with EL37 !?
  10. Mono push-pull driver PCB
  11. Magnavox 139AA schematics, info?
  12. Anyone knows what driver tube on DowdyLama's GM-70......
  13. Building an amp around the QB5/1750 transmitter tube
  14. Instrument amp from '59 Lowrey donor chassis.
  15. cascoded gyrator loaded 6H9C to low idle.
  16. vacuum tube DAC and connection
  17. Dynaco ST70 II Right Channel Out
  18. ST70 Inrush Issue
  19. ECC88 OTL heaphone amp
  20. Help with deciding to build or buy Tube amp.
  21. Luxman LV-105 static on on channel
  22. equivlent of FU-50
  23. placing the volume control
  24. PP 300B ''transformer coupled''
  25. My First Tube Preamp
  26. Tube amp kit and speaker recommendations?
  27. First design GU81M SE triode
  28. Instruments & Amps forum - where is it?
  29. Power supply capacitor question for tubelab simple ss
  30. EL300 = 6FN5 / PL300 = 35FN5 tube
  31. 6U8 driving 45
  32. very low impedance white follower with 6H13C
  33. EL86 Any idea helps.
  34. 6112 and 6111 Mini-preamp
  35. Expert advice on what preamp to chose
  36. Harman Kardon DPR-7, Commander series pre/mixer
  37. input transformer - mumetal casing etc.
  38. Oil-filled caps: ASC versus Panasonic
  39. SOHA headphone amp
  40. Using a single triode as a .......
  41. Sonic Frontiers SFP-1 Phono Stage
  42. Help!! with attenuation.
  43. power up inrush current limiter - anyone using?
  44. Audioromy FU-29, Latest Model 828A Mini Review
  45. Vertical-deflection
  46. Drilling a hole
  47. Edcor CXPP25-MS-8K V Triode Z-565
  48. bad opt measured values
  49. Mu Follower Driver for Push-Pull
  50. Hickok 539 question...
  51. need datasheets for a phillips transformer if anyone has any
  52. Chicago power XFMR question.
  53. Coupling Capacitor - Pls Help
  54. Help please on Christmas gift
  55. Audio Note P-zero
  56. SE EL34 Schematic - What do you think?
  57. Playing with hybrid amp: SRPP + MOSFET
  58. 300B filament supply question
  59. KT88 Parallel Push Pull
  60. cheating life out of old tubes?
  61. dBu transformer ratings
  62. Dared MP-2a3c mods
  63. Output transformers (Wolpert)
  64. Using Mains Transformers as Outputs
  65. Tube just for show...
  66. first project - first post - poddwatt
  67. High power CCS
  68. Analog Summing
  69. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  70. cascode tubes
  71. High Fidelity by Pilot (circa 1953)
  72. Hardware help please
  73. integrated amps 100 per channel
  74. KT88 mounting question
  75. Output Transformer question
  76. Angstrom Thermionic
  77. ECC88 tube buffer NEEDED !
  78. Marshall 8080, missing components
  79. Paralell SE 807 Amp design
  80. Putting together a tweaker friendly amplifier!
  81. Tube chassis
  82. DHT headphone Hybrid-CF+
  83. Looking for specs on this Beyer Xfmr
  84. Resistors for Berning EA-2101?
  85. Uneven Plate Glow
  86. Parafeed transformer sounds thin
  87. Lightbulbs as ccs
  88. My AWESOME First DIY amp
  89. Cary audio design SLI 80
  90. A1538 OPT?
  91. Genalex A2900 Keep or Sell?
  92. 6CB6 Spice Model wanted
  93. XFMR Help?
  94. 12 volt to 300 volt inverter question for tubes
  95. These amps should be verboten!
  96. how to use PCL86 instead of ecl86
  97. PSU for Aikido (4x 12SN7)
  98. SCA35 and AU-70
  99. Analisys of power amp limitations of tube bias range
  100. DIY Phono Preamp ??
  101. NOS 211 RCA or National Union?
  102. Iron Powder + Resin Output Transformer
  103. The Radio Hat Challenge
  104. EU regulations
  105. Transconductance for kt-90 in plain english
  106. Craftsmen RC-2
  107. Valve Amplification Company V100
  108. Parallel feed transformer with SRPP
  109. It's heeeeeere!- Valve Amplifiers 4th Edition
  110. opera consonance phonostage-PM1
  111. Anybody Explain this Preamp shematic?
  112. The high-voltage collection
  113. Input transformer topology question
  114. JE Labs 300Bdx stereo - troubleshooting
  115. battery operated 12/24/48 Volt multiple tube OTL
  116. Bringing up long-stored tube gear
  117. About RH84 three channel?
  118. MCC with Fisher
  119. Directly heated cathodes
  120. Build recommendation
  121. Ortofon KS 591 - informations
  122. Oatley K295-extra space for tubes
  123. A beginner's tube amp to drive a pair of fostex Fe103e
  124. Tame the beast.
  125. KT88 and Hammond Transformer
  126. B+ Drifts down after 2 hours
  127. Power amp sputters on turnoff
  128. Yet another EQP-1A
  129. How to bias 6SL7?
  130. 6CG7/6FQ7 = 6N5P (6Н5П)
  131. #27 mu stage
  132. Compactron Regulated Power Supply
  133. Best sounding voltage amplifier for hybride.
  134. PX25 to 300B pins
  135. de-gassing power tubes???
  136. Heathkit 51-29 output transformers issure
  137. 6AS7 Model
  138. 26H choke good enough for a grid or anode choke?
  139. Russian 6R2P for small amp.
  140. Power transformer primary is open.
  141. Rectifier oddness
  142. First Tube Build, Thoughts?
  143. Output Transformers
  144. Lazy Sunday 6SN7 Preamp
  145. Audio research VT200 Biasing & Schematic
  146. finished my new preamplifier!!
  147. What would be the correct output cap for this OTL Headphone Amp?
  148. Full Bridge Rectifier With Tubes
  149. Looking for data sheet for GE JAN 6146W/7212
  150. Best Valve pre-amp match for ME 550 amp
  151. Fisher 500c
  152. From old Philips tube books , just for tube audio DIY friends !
  153. UFO
  154. Adding a preamp?
  155. XS-225 valve amp circuit.
  156. LS7/CV1660 curves
  157. Differences between 12V6 tube and 12A6 tube?
  158. Please check my schematic
  159. 12W Push pull w/6C4C
  160. Tube Date Code
  161. For new members....
  162. Graphite ring on sweep tubes
  163. 6N6P tube - focus on
  164. Vox Guitar Amp Created a Revolution
  165. Hot tube preamp pedal build
  166. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  167. Radford STA100 improvements?
  168. Playmaster unit 2 help needed!
  169. help me build an output transformer
  170. Vintage Magnavox tube amp
  171. Christmas Build, advice needed.
  172. Speaker suggestions for ST-70
  173. Tube markings?
  174. gaumont-kalee
  175. amplifiers audio research D90
  176. 40W Glass A 300B tube schematic needed.
  177. Hum in one channel only
  178. Water cooling Power Tubes
  179. Toroid Output Transformer from Plitron
  180. Scott LK-30 Assembly Manual Needed
  181. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  182. The best valve amp!
  183. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  184. More probably stupid questions about feedback
  185. single stage amp?
  186. SS 83 again
  187. Making Spice Models for tubes
  188. Seth mk 2 ???
  189. Colorful inspiration
  190. Testing KT-90's Ei NIs Yugoslavia
  191. El Cheapo Transformer Question
  192. Why does the grid extend so far beyond the anode ?
  193. Valve amplifier identification
  194. E-M-field problem
  195. Effective cathode resistance
  196. Spectrum evaluation ECC82
  197. power d90-b
  198. el34, kt88, kt90, 6550 to 8417 conversion
  199. Do you know these capacitors?
  200. Vintage Capacitor Identification??
  201. GRAAF GAAFiti WFB ONE - Schematic needed
  202. Oscillation WE417A
  203. EL84 fixed fixed bias
  204. Blown stereo
  205. 807/6au6 pure pentode mode amplifier
  206. help with ID'ing a tube
  207. Magnavox 50EH5 Stereo Amp
  208. My new Circlotron OTL tube power Amp.
  209. ideas for a tube eating guitair amp
  210. 6DE4, unused pins
  211. 300B what output transformer Sowter or Lundahl?
  212. 6DJ8 preamp w/balanced input - strange schematic
  213. Screen Grid Regulation Requirements
  214. Advice needed on new 6L6 ro 6V6 SE or SET build
  215. need a little help with an HK solo2 tube receiver
  216. Help me to build Vacuum Tube Amp.
  217. amp with SRPP output stage? post if you know one
  218. Output transformer question
  219. EF86 Phono pre-amp or Mcintosh MC2200?
  220. Transcendar is Branching Out
  221. can SE driven PP be clean enough to sound SE ?
  222. k12-m amp not working
  223. 813 amp and old choke
  224. Several hundred tubes found! What to do!
  225. Possible to convert Audiorom Fu29 to Single end?
  226. Measuring bias
  227. ecc802s SRPP preamplifier
  228. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  229. Class A KT88 info
  230. What is screen tap of transformer?
  231. Brightest heaters in tubes?
  232. 40% tap or not
  233. 6dj8 phono schematic needed
  234. EL34 Parts..
  235. solid state driven p-p ultralinear
  236. linestage w/separate PSU: where to "split" ?
  237. Anybody know this TELEFUNKEN SE transformer?
  238. Too much feedback?
  239. Tube Power Supply Dummy Load
  240. For 6c33 Fans. A new schematic
  241. WAD phono 3 motorboating with Raphaelite 300b
  242. Help! Tube Tester in Austin or Lago Vista?
  243. Vintage Stromberg Carlson
  244. GM70 and Other LTSpice Tube Models
  245. Please help me understand this feedback
  246. Affordable Valve Company - Re-bias
  247. The effect of different value coupling capacitors?
  248. Closed loop stability help needed.
  249. EAR 509 OPT Impedances
  250. Installing Hammond 1609s in K12-G

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