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  1. Ju-Jutsu: The Ultimate Monoblock
  2. Looking for Phono Stage ...
  3. Finished my Fisher 460t-thanks
  4. Datasheet Cpk values
  5. Eico635 tester
  6. 6p3s...
  7. Help with Amp Salvage
  8. 808 SE Build
  9. how to bias my rebuilt dynaco st 70
  10. Want help - RCA Tube Manual RIAA Phono Stage
  11. Tube Pre-amp for both CD and Phono inputs
  12. Cascode Driver Oscillation
  13. 872b or 6gj5a for a homebrew bass amp
  14. how does it sound and perform?
  15. Bootstrapped long tail
  16. Thorens TEM 3200 clone
  17. Identifying this RCA Transformer
  18. Tube burning
  19. Add Standby Directly after Rectifier, or After First Filter Stage?
  20. Help with some tube ID
  21. CCS power amp bias
  22. this is EL34 tube of what model?
  23. Looking for constructive criticism on my first design
  24. Audio note kit 1 vs Meishu
  25. Tube Amp Gain V.S. RF Gain
  26. Kool-mu material for building audio transformer
  27. Buzz/Hum in Matrix amplifier
  28. Optimation PA-250AC Lab-Grade Audio Amplifier
  29. RS1003 in SE triode-UL monoblocks
  30. Bypass capacitors in Tube amps
  31. Basic question re: gNFB around 3 stages
  32. James PP Audio Transformers, any good?
  33. Seeking advice for tube amp kit on,seems to be, chinese site
  34. Tube pricing from 1981
  35. 6e5p WCF headphone amp with no cap!
  36. "How it's made" vacuum tubes..
  37. Citation I and IV phono schematic query
  38. GS-4V High-mu russian triode for RIAA preamp
  39. good source for amp chassis in europe?
  40. Help identify and replacement of ? resistor
  41. New tube amp diy kit required power?
  42. Decoupling DC heater supply between valves..benefit?
  43. The Aikido Comedy: Straight Talk
  44. Recapping tube preamp questions
  45. A tube amp that's actually a tesla coil.
  46. Tube "Orientation"
  47. 18 watt tremolo vvr
  48. Pre amp output, would this work?
  49. Aikido Power Amp.....Possible??
  50. 12AX7 questions
  51. 6550 PUSH-PULL
  52. CCS at plate? Unknown schematic part
  53. Most odd grid choke behaviour.
  54. Spec for Altec TP-404 Transformer
  55. why do wimpy drivers for 2A3 work as well as they do?
  56. Seeking advice on Tube buffer / pre-amp
  57. 8x Push-pull KT88 class A in triode mode
  58. Tube Pre dull into Tube Amp - cause ?
  59. FINALLY I can start building my GM70
  60. Russian triodes ГИ-15Б arriving in a few days
  61. Cap or resistor
  62. KT88/PP driver confusion
  63. Simple SE GU-50
  64. Darling 1626
  65. 01a DHT Preamp
  66. Suitable tubes for Gomes output
  67. phono line stage project
  68. Whats wrong with this circuit?
  69. Any Newcomb Gurus.?
  70. Preamp Tube MU Level?
  71. SRPP Paraccordion topology ?
  72. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  73. Modification of a Chinese KT90 PP amplifier
  74. Tricky Headphone Amp design for AK4396
  75. How to know voltage bias adjustmentwith this data?
  76. Strange Stability Enhancement Trick
  77. has anyone bought tubes from http://www.tangotubes.com/
  78. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  79. Ever heard of British transofmer company "Ro"?
  80. A friend gave me some random tubes...
  81. Replacement for 6e2 without vu
  82. PP GU50 triode strapped project
  83. Tube VAS stage questions???
  84. OT impedance help: 9.8 vs 8k
  85. popping & crackling noise from restored valve AM radio
  86. Choosing 6550 PP Output Transformer
  87. Reversing Interstage Transformer
  88. Aikido 9 pin All in One Build
  89. KT88 PP UL Design Help Needed
  90. Cayin A-300B schematic needed
  91. Please Recommend a Preamp!
  92. Which Antek transforms to use
  93. Integrated Amp as Preamp and Subwoofer amp
  94. Uses for 715C Pulse Tetrode
  95. PP KT-88 w/866A MV HT Supply
  96. EC88 (6DL4) NOS Mullard - any use at all?
  97. Advice sought on thermionic headphone amp
  98. Eico HF-81: Input Selector bypass
  99. 12b4 bass rolloff problem
  100. No Right ch sound on yaqin mc10l
  101. tester causing bias to rise?
  102. Heaters & Filaments: AC vs. DC
  103. Old HP power transformers... need some wiring advice!
  104. Old HP power transformers... need some wiring advice!
  105. RCA RS177H just dosen't sound right! Caps?
  106. silicon or tube rectifier in an EL34 SE
  107. Help original 300G LEGACY
  108. 813 Tube-Steak!
  109. Basic 12AU7 heatrr question
  110. Shipping a vacuum tube to China
  111. 6DJ8/ECC88-SRPP Tube Preamplifier
  112. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  113. Found tons of Tubes,and many other parts
  114. Ampeg B15 Heritage Clone Help
  115. EZ80 Data Sheets, R-Lim and Max Cap
  116. Filament Voltages CT vs Non-CT
  117. Troubleshooting help needed
  118. What is it? Tube guessology
  119. Bass & Treble controls, or rather lack of.
  120. Quicksilver 8417 Power Supply Question
  121. Why a sudden distortion in treble of this SET amplifier?
  122. 5f1 Champ grounding
  123. Antitriode PP with EL34
  124. How to calculate Pout for Push Pull design
  125. Newbie Question - Power Transformer vs Isolation Transformer
  126. All tubes red plating
  127. Exceeding bias voltage?
  128. Vacuum State RTP Preamp Problem
  129. Alfred Morgan Tube Preamplifier
  130. 845 vs GM70
  131. Looking for project suggestions - 12au7 pre-amp?
  132. Contemporary tradition breaking amp schematics.
  133. ul - triode coupled screen grid resistor
  134. Optimum driver valve for an interstage-transformer-driven SE 300B
  135. 6C33C
  136. Soundcraftsmen 5050
  137. Tetra Phono Question
  138. WF tube
  139. Opt laminations isolation
  140. Heretical Source
  141. Broskie auto bias
  142. heater wiring - the Good the Bad and the Ugly
  143. AC Line Filter
  144. Counterpoint SA5000 Help
  145. Problem with ECC83 measurement values - please help
  146. Newbie Bias help ?
  147. AV305m AVVT
  148. Pot mechanical resistance and restoration..
  149. HMV Little Nipper mantle radio = 1 STEREO
  150. What's the simplest way to adjust filament voltage?
  151. GDAP-06
  152. Audio Note L6 - Schematic?
  153. Preventing HV flashover on socket pins
  154. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  155. SE with PP OPT's?
  156. 12ax7/12AT7 Recommendations
  157. HELP: Eimac 75TL amp high frequency roll off
  158. unison reserch s8, let's build it!
  159. Where do super high end companies get their transformers?
  160. Tube Tester Panel Meter
  161. Attic find AMP
  162. Help getting Imax and Eb approximations for a push-pull amp
  163. Is this amp OK to buy, or is this a problem?
  164. Swirling Harmonics, can it be described
  165. Line stage with u-follower and nfb
  166. Newbie looking for help, pre-out to tube amp.
  167. Unison research integrated ampliphier schematics
  168. FET CCS anode load and RFI/oscillation.
  169. Old schematic
  170. Newbie Looking for Replacement OPTS Motorola Console Amp
  171. Merlyn- May AudioXpress
  172. How to clean tubes?
  173. does the 3A5 have the stones to drive a 2A3?
  174. New amp: 13DE7 SE hybrid
  175. My amp is motorboating, improve it with b+ regulator ?
  176. Can you identify these amps?
  177. Sowter SA01 - anyone used it ?
  178. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  179. Resistors and combinations
  180. thr light in pcl82
  181. Bogen L330 - Worth restoring?
  182. Supro model 24 amp transformers
  183. Those Magnificent Television Tubes
  184. Demagnetizing OPT?
  185. Real DIY fun hybrid testing.
  186. Extreme hum in EQ output
  187. 46 triode-strapped DHT spice model
  188. SET output impedance vs speaker impedance
  189. Help with layout of tube preamp
  190. eico HF-65
  191. Wirewound bias pot problem.
  192. Driver for Telefunken RS242 in class A2
  193. Help on my signal generator
  194. another tube fact or fallacy
  195. Gap in Transformer Lams - OCD Check
  196. how to test...
  197. chinese tube amp
  198. tube/valve pc-80
  199. GM-70 All done
  200. Peavey 60/60 classic series schematic
  201. preamp for reciever?
  202. Designing a Tube Rectifier Circuit
  203. Bogen RP40A transformers....what to build with them?
  204. Harmony guitar amp restoration questions
  205. Heads Up for "El Cheapo" Builders
  206. replacing kt66 valves
  207. Help with power transformer identification
  208. 6-8x el84 Per channel
  209. To vary a signal pentode to triode in stages
  210. I have 2 choices for resistive load, need opinions.
  211. Tesla PCC88 7DJ8 dual triode - Help Needed.
  212. PP6550
  213. LT1083 interesting startup problem
  214. ECC33 Driver Stage
  215. Hiraga's Improved Concertina Phase Splitter
  216. 274B a direct replacement for 5AR4/GZ34?
  217. Help power up akai M8 amps
  218. Sonic Frontiers Power 3 Help!
  219. ImPasse Preamp now online
  220. Power supply for tube preamplifier with PCC88
  221. Don't know where to start...
  222. DIY noob
  223. 300B amp cathode bypass
  224. Amp hum with Preamp off
  225. First Project with these tubes
  226. 7189a socket rewiring
  227. Hybrid rectifiers in PSUD2
  228. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  229. About 6AS7BTL Amp
  230. Output Stage Protection Circuit
  231. Silly basic layout question - AC heaters
  232. heater voltage variation for special tubes
  233. Want to build a 807 Vixen.. Looking for help.
  234. Connecting Speakers to Yaqin 10L
  235. Gyrator Filter
  236. 6ab4 tube socket mounting
  237. Any Moto heads? Need OT advice please
  238. Did I break my tube? (new blue glow)
  239. I need help with ccs based LTP
  240. 4033L- rare triode tube.
  241. Single tube linestage schematic wanted: 8CG7
  242. Tetra Sans PS
  243. Tone controls
  244. Vintage Heathkit Electronic Switch as soundcard interface
  245. K-12M extra caps??
  246. Looking for Tube Amp Kit Recommendations
  247. magnatone 280 schematic
  248. high voltage after cap. change
  249. My first tube amp
  250. Recommendations for 6888 triode operating point?

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