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  1. Most powerful SE DIY design?
  2. 420vdc supply for a tube amp
  3. PSE 2a3 operating points?
  4. Ju-Jutsu: The Ultimate Monoblock
  5. Looking for Phono Stage ...
  6. Finished my Fisher 460t-thanks
  7. Datasheet Cpk values
  8. Eico635 tester
  9. 6p3s...
  10. Help with Amp Salvage
  11. 808 SE Build
  12. how to bias my rebuilt dynaco st 70
  13. Want help - RCA Tube Manual RIAA Phono Stage
  14. Tube Pre-amp for both CD and Phono inputs
  15. Cascode Driver Oscillation
  16. 872b or 6gj5a for a homebrew bass amp
  17. how does it sound and perform?
  18. Bootstrapped long tail
  19. Thorens TEM 3200 clone
  20. Identifying this RCA Transformer
  21. Tube burning
  22. Add Standby Directly after Rectifier, or After First Filter Stage?
  23. Help with some tube ID
  24. CCS power amp bias
  25. this is EL34 tube of what model?
  26. Looking for constructive criticism on my first design
  27. Audio note kit 1 vs Meishu
  28. Tube Amp Gain V.S. RF Gain
  29. Kool-mu material for building audio transformer
  30. Buzz/Hum in Matrix amplifier
  31. Optimation PA-250AC Lab-Grade Audio Amplifier
  32. RS1003 in SE triode-UL monoblocks
  33. Bypass capacitors in Tube amps
  34. Basic question re: gNFB around 3 stages
  35. James PP Audio Transformers, any good?
  36. Seeking advice for tube amp kit on,seems to be, chinese site
  37. Tube pricing from 1981
  38. 6e5p WCF headphone amp with no cap!
  39. "How it's made" vacuum tubes..
  40. Citation I and IV phono schematic query
  41. GS-4V High-mu russian triode for RIAA preamp
  42. good source for amp chassis in europe?
  43. Help identify and replacement of ? resistor
  44. New tube amp diy kit required power?
  45. Decoupling DC heater supply between valves..benefit?
  46. The Aikido Comedy: Straight Talk
  47. Recapping tube preamp questions
  48. A tube amp that's actually a tesla coil.
  49. Tube "Orientation"
  50. 18 watt tremolo vvr
  51. Pre amp output, would this work?
  52. Aikido Power Amp.....Possible??
  53. 12AX7 questions
  54. 6550 PUSH-PULL
  55. CCS at plate? Unknown schematic part
  56. Most odd grid choke behaviour.
  57. Spec for Altec TP-404 Transformer
  58. why do wimpy drivers for 2A3 work as well as they do?
  59. Seeking advice on Tube buffer / pre-amp
  60. 8x Push-pull KT88 class A in triode mode
  61. Tube Pre dull into Tube Amp - cause ?
  62. FINALLY I can start building my GM70
  63. Russian triodes ГИ-15Б arriving in a few days
  64. Cap or resistor
  65. KT88/PP driver confusion
  66. Simple SE GU-50
  67. Darling 1626
  68. 01a DHT Preamp
  69. Suitable tubes for Gomes output
  70. phono line stage project
  71. Whats wrong with this circuit?
  72. Any Newcomb Gurus.?
  73. Preamp Tube MU Level?
  74. SRPP Paraccordion topology ?
  75. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  76. Modification of a Chinese KT90 PP amplifier
  77. Tricky Headphone Amp design for AK4396
  78. How to know voltage bias adjustmentwith this data?
  79. Strange Stability Enhancement Trick
  80. has anyone bought tubes from http://www.tangotubes.com/
  81. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  82. Ever heard of British transofmer company "Ro"?
  83. A friend gave me some random tubes...
  84. Replacement for 6e2 without vu
  85. PP GU50 triode strapped project
  86. Tube VAS stage questions???
  87. OT impedance help: 9.8 vs 8k
  88. popping & crackling noise from restored valve AM radio
  89. Choosing 6550 PP Output Transformer
  90. Reversing Interstage Transformer
  91. Aikido 9 pin All in One Build
  92. KT88 PP UL Design Help Needed
  93. Cayin A-300B schematic needed
  94. Please Recommend a Preamp!
  95. Which Antek transforms to use
  96. Integrated Amp as Preamp and Subwoofer amp
  97. Uses for 715C Pulse Tetrode
  98. PP KT-88 w/866A MV HT Supply
  99. EC88 (6DL4) NOS Mullard - any use at all?
  100. Advice sought on thermionic headphone amp
  101. Eico HF-81: Input Selector bypass
  102. 12b4 bass rolloff problem
  103. No Right ch sound on yaqin mc10l
  104. tester causing bias to rise?
  105. Heaters & Filaments: AC vs. DC
  106. Old HP power transformers... need some wiring advice!
  107. Old HP power transformers... need some wiring advice!
  108. RCA RS177H just dosen't sound right! Caps?
  109. silicon or tube rectifier in an EL34 SE
  110. Help original 300G LEGACY
  111. 813 Tube-Steak!
  112. Basic 12AU7 heatrr question
  113. Shipping a vacuum tube to China
  114. 6DJ8/ECC88-SRPP Tube Preamplifier
  115. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  116. Found tons of Tubes,and many other parts
  117. Ampeg B15 Heritage Clone Help
  118. EZ80 Data Sheets, R-Lim and Max Cap
  119. Filament Voltages CT vs Non-CT
  120. Troubleshooting help needed
  121. What is it? Tube guessology
  122. Bass & Treble controls, or rather lack of.
  123. Quicksilver 8417 Power Supply Question
  124. Why a sudden distortion in treble of this SET amplifier?
  125. 5f1 Champ grounding
  126. Antitriode PP with EL34
  127. How to calculate Pout for Push Pull design
  128. Newbie Question - Power Transformer vs Isolation Transformer
  129. All tubes red plating
  130. Exceeding bias voltage?
  131. Vacuum State RTP Preamp Problem
  132. Alfred Morgan Tube Preamplifier
  133. 845 vs GM70
  134. Looking for project suggestions - 12au7 pre-amp?
  135. Contemporary tradition breaking amp schematics.
  136. ul - triode coupled screen grid resistor
  137. Optimum driver valve for an interstage-transformer-driven SE 300B
  138. 6C33C
  139. Soundcraftsmen 5050
  140. Tetra Phono Question
  141. WF tube
  142. Opt laminations isolation
  143. Heretical Source
  144. Broskie auto bias
  145. heater wiring - the Good the Bad and the Ugly
  146. AC Line Filter
  147. Counterpoint SA5000 Help
  148. Problem with ECC83 measurement values - please help
  149. Newbie Bias help ?
  150. AV305m AVVT
  151. Pot mechanical resistance and restoration..
  152. HMV Little Nipper mantle radio = 1 STEREO
  153. What's the simplest way to adjust filament voltage?
  154. GDAP-06
  155. Audio Note L6 - Schematic?
  156. Preventing HV flashover on socket pins
  157. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  158. SE with PP OPT's?
  159. 12ax7/12AT7 Recommendations
  160. HELP: Eimac 75TL amp high frequency roll off
  161. unison reserch s8, let's build it!
  162. Where do super high end companies get their transformers?
  163. Tube Tester Panel Meter
  164. Attic find AMP
  165. Help getting Imax and Eb approximations for a push-pull amp
  166. Is this amp OK to buy, or is this a problem?
  167. Swirling Harmonics, can it be described
  168. Line stage with u-follower and nfb
  169. Newbie looking for help, pre-out to tube amp.
  170. Unison research integrated ampliphier schematics
  171. FET CCS anode load and RFI/oscillation.
  172. Old schematic
  173. Newbie Looking for Replacement OPTS Motorola Console Amp
  174. Merlyn- May AudioXpress
  175. How to clean tubes?
  176. does the 3A5 have the stones to drive a 2A3?
  177. New amp: 13DE7 SE hybrid
  178. My amp is motorboating, improve it with b+ regulator ?
  179. Can you identify these amps?
  180. Sowter SA01 - anyone used it ?
  181. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  182. Resistors and combinations
  183. thr light in pcl82
  184. Bogen L330 - Worth restoring?
  185. Supro model 24 amp transformers
  186. Those Magnificent Television Tubes
  187. Demagnetizing OPT?
  188. Real DIY fun hybrid testing.
  189. Extreme hum in EQ output
  190. 46 triode-strapped DHT spice model
  191. SET output impedance vs speaker impedance
  192. Help with layout of tube preamp
  193. eico HF-65
  194. Wirewound bias pot problem.
  195. Driver for Telefunken RS242 in class A2
  196. Help on my signal generator
  197. another tube fact or fallacy
  198. Gap in Transformer Lams - OCD Check
  199. how to test...
  200. chinese tube amp
  201. tube/valve pc-80
  202. GM-70 All done
  203. Peavey 60/60 classic series schematic
  204. preamp for reciever?
  205. Designing a Tube Rectifier Circuit
  206. Bogen RP40A transformers....what to build with them?
  207. Harmony guitar amp restoration questions
  208. Heads Up for "El Cheapo" Builders
  209. replacing kt66 valves
  210. Help with power transformer identification
  211. 6-8x el84 Per channel
  212. To vary a signal pentode to triode in stages
  213. I have 2 choices for resistive load, need opinions.
  214. Tesla PCC88 7DJ8 dual triode - Help Needed.
  215. PP6550
  216. LT1083 interesting startup problem
  217. ECC33 Driver Stage
  218. Hiraga's Improved Concertina Phase Splitter
  219. 274B a direct replacement for 5AR4/GZ34?
  220. Help power up akai M8 amps
  221. Sonic Frontiers Power 3 Help!
  222. ImPasse Preamp now online
  223. Power supply for tube preamplifier with PCC88
  224. Don't know where to start...
  225. DIY noob
  226. 300B amp cathode bypass
  227. Amp hum with Preamp off
  228. First Project with these tubes
  229. 7189a socket rewiring
  230. Hybrid rectifiers in PSUD2
  231. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  232. About 6AS7BTL Amp
  233. Output Stage Protection Circuit
  234. Silly basic layout question - AC heaters
  235. heater voltage variation for special tubes
  236. Want to build a 807 Vixen.. Looking for help.
  237. Connecting Speakers to Yaqin 10L
  238. Gyrator Filter
  239. 6ab4 tube socket mounting
  240. Any Moto heads? Need OT advice please
  241. Did I break my tube? (new blue glow)
  242. I need help with ccs based LTP
  243. 4033L- rare triode tube.
  244. Single tube linestage schematic wanted: 8CG7
  245. Tetra Sans PS
  246. Tone controls
  247. Vintage Heathkit Electronic Switch as soundcard interface
  248. K-12M extra caps??
  249. Looking for Tube Amp Kit Recommendations
  250. magnatone 280 schematic

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