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  1. Tube "Orientation"
  2. 18 watt tremolo vvr
  3. Pre amp output, would this work?
  4. Aikido Power Amp.....Possible??
  5. 12AX7 questions
  6. 6550 PUSH-PULL
  7. CCS at plate? Unknown schematic part
  8. Most odd grid choke behaviour.
  9. Spec for Altec TP-404 Transformer
  10. why do wimpy drivers for 2A3 work as well as they do?
  11. Seeking advice on Tube buffer / pre-amp
  12. 8x Push-pull KT88 class A in triode mode
  13. Tube Pre dull into Tube Amp - cause ?
  14. FINALLY I can start building my GM70
  15. Russian triodes ГИ-15Б arriving in a few days
  16. Cap or resistor
  17. KT88/PP driver confusion
  18. Darling 1626
  19. 01a DHT Preamp
  20. Suitable tubes for Gomes output
  21. phono line stage project
  22. Whats wrong with this circuit?
  23. Any Newcomb Gurus.?
  24. Preamp Tube MU Level?
  25. SRPP Paraccordion topology ?
  26. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  27. Modification of a Chinese KT90 PP amplifier
  28. Tricky Headphone Amp design for AK4396
  29. How to know voltage bias adjustmentwith this data?
  30. Strange Stability Enhancement Trick
  31. has anyone bought tubes from http://www.tangotubes.com/
  32. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  33. Ever heard of British transofmer company "Ro"?
  34. A friend gave me some random tubes...
  35. Replacement for 6e2 without vu
  36. PP GU50 triode strapped project
  37. Tube VAS stage questions???
  38. OT impedance help: 9.8 vs 8k
  39. popping & crackling noise from restored valve AM radio
  40. Choosing 6550 PP Output Transformer
  41. Reversing Interstage Transformer
  42. Aikido 9 pin All in One Build
  43. KT88 PP UL Design Help Needed
  44. Cayin A-300B schematic needed
  45. Please Recommend a Preamp!
  46. Which Antek transforms to use
  47. Integrated Amp as Preamp and Subwoofer amp
  48. Uses for 715C Pulse Tetrode
  49. PP KT-88 w/866A MV HT Supply
  50. EC88 (6DL4) NOS Mullard - any use at all?
  51. Advice sought on thermionic headphone amp
  52. Eico HF-81: Input Selector bypass
  53. 12b4 bass rolloff problem
  54. No Right ch sound on yaqin mc10l
  55. tester causing bias to rise?
  56. Heaters & Filaments: AC vs. DC
  57. Old HP power transformers... need some wiring advice!
  58. RCA RS177H just dosen't sound right! Caps?
  59. silicon or tube rectifier in an EL34 SE
  60. Help original 300G LEGACY
  61. 813 Tube-Steak!
  62. Basic 12AU7 heatrr question
  63. Shipping a vacuum tube to China
  64. 6DJ8/ECC88-SRPP Tube Preamplifier
  65. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  66. Found tons of Tubes,and many other parts
  67. EZ80 Data Sheets, R-Lim and Max Cap
  68. Filament Voltages CT vs Non-CT
  69. Troubleshooting help needed
  70. What is it? Tube guessology
  71. Bass & Treble controls, or rather lack of.
  72. Quicksilver 8417 Power Supply Question
  73. Why a sudden distortion in treble of this SET amplifier?
  74. Antitriode PP with EL34
  75. How to calculate Pout for Push Pull design
  76. Newbie Question - Power Transformer vs Isolation Transformer
  77. All tubes red plating
  78. Exceeding bias voltage?
  79. Vacuum State RTP Preamp Problem
  80. Alfred Morgan Tube Preamplifier
  81. 845 vs GM70
  82. Looking for project suggestions - 12au7 pre-amp?
  83. Contemporary tradition breaking amp schematics.
  84. ul - triode coupled screen grid resistor
  85. Optimum driver valve for an interstage-transformer-driven SE 300B
  86. 6C33C
  87. Soundcraftsmen 5050
  88. Tetra Phono Question
  89. WF tube
  90. Opt laminations isolation
  91. Heretical Source
  92. Broskie auto bias
  93. Heater Wiring - the Good the Bad and the Ugly
  94. Counterpoint SA5000 Help
  95. Problem with ECC83 measurement values - please help
  96. Newbie Bias help ?
  97. AV305m AVVT
  98. Pot mechanical resistance and restoration..
  99. HMV Little Nipper mantle radio = 1 STEREO
  100. What's the simplest way to adjust filament voltage?
  101. GDAP-06
  102. Audio Note L6 - Schematic?
  103. Preventing HV flashover on socket pins
  104. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  105. SE with PP OPT's?
  106. 12ax7/12AT7 Recommendations
  107. HELP: Eimac 75TL amp high frequency roll off
  108. unison reserch s8, let's build it!
  109. Where do super high end companies get their transformers?
  110. Attic find AMP
  111. Help getting Imax and Eb approximations for a push-pull amp
  112. Is this amp OK to buy, or is this a problem?
  113. Swirling Harmonics, can it be described
  114. Line stage with u-follower and nfb
  115. Newbie looking for help, pre-out to tube amp.
  116. Unison research integrated ampliphier schematics
  117. FET CCS anode load and RFI/oscillation.
  118. Old schematic
  119. Newbie Looking for Replacement OPTS Motorola Console Amp
  120. Merlyn- May AudioXpress
  121. How to clean tubes?
  122. does the 3A5 have the stones to drive a 2A3?
  123. New amp: 13DE7 SE hybrid
  124. My amp is motorboating, improve it with b+ regulator ?
  125. Can you identify these amps?
  126. Sowter SA01 - anyone used it ?
  127. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  128. Resistors and combinations
  129. thr light in pcl82
  130. Bogen L330 - Worth restoring?
  131. Those Magnificent Television Tubes
  132. Demagnetizing OPT?
  133. Real DIY fun hybrid testing.
  134. Extreme hum in EQ output
  135. 46 triode-strapped DHT spice model
  136. SET output impedance vs speaker impedance
  137. Help with layout of tube preamp
  138. eico HF-65
  139. Wirewound bias pot problem.
  140. Driver for Telefunken RS242 in class A2
  141. Help on my signal generator
  142. another tube fact or fallacy
  143. Gap in Transformer Lams - OCD Check
  144. how to test...
  145. chinese tube amp
  146. tube/valve pc-80
  147. GM-70 All done
  148. preamp for reciever?
  149. Designing a Tube Rectifier Circuit
  150. Bogen RP40A transformers....what to build with them?
  151. Heads Up for "El Cheapo" Builders
  152. replacing kt66 valves
  153. Help with power transformer identification
  154. 6-8x el84 Per channel
  155. To vary a signal pentode to triode in stages
  156. I have 2 choices for resistive load, need opinions.
  157. Tesla PCC88 7DJ8 dual triode - Help Needed.
  158. PP6550
  159. LT1083 interesting startup problem
  160. ECC33 Driver Stage
  161. Hiraga's Improved Concertina Phase Splitter
  162. 274B a direct replacement for 5AR4/GZ34?
  163. Help power up akai M8 amps
  164. Sonic Frontiers Power 3 Help!
  165. ImPasse Preamp now online
  166. Power supply for tube preamplifier with PCC88
  167. Don't know where to start...
  168. DIY noob
  169. 300B amp cathode bypass
  170. Amp hum with Preamp off
  171. First Project with these tubes
  172. 7189a socket rewiring
  173. Hybrid rectifiers in PSUD2
  174. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  175. About 6AS7BTL Amp
  176. Output Stage Protection Circuit
  177. Silly basic layout question - AC heaters
  178. heater voltage variation for special tubes
  179. Want to build a 807 Vixen.. Looking for help.
  180. Connecting Speakers to Yaqin 10L
  181. Gyrator Filter
  182. 6ab4 tube socket mounting
  183. Any Moto heads? Need OT advice please
  184. Did I break my tube? (new blue glow)
  185. I need help with ccs based LTP
  186. 4033L- rare triode tube.
  187. Single tube linestage schematic wanted: 8CG7
  188. Tetra Sans PS
  189. Tone controls
  190. Vintage Heathkit Electronic Switch as soundcard interface
  191. K-12M extra caps??
  192. Looking for Tube Amp Kit Recommendations
  193. high voltage after cap. change
  194. My first tube amp
  195. Recommendations for 6888 triode operating point?
  196. Mullard 12AX7 part uniformity
  197. 6n15n-EB confusion
  198. Noob Question: Phono Preamp
  199. Transformer data required P782
  200. Snubbers on Power Transformer Secondaries
  201. CCS for 6V6 PP amp
  202. screen voltage for triode strapped pentode
  203. New Driver
  204. purpose and value importance of resistor
  205. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  206. Help with amp please.
  207. Another Discrete Current Source
  208. 834 Triode amp
  209. Determing the reason for mystery? cap in schematic.
  210. Dyna ST70 to Dual-differential EL34 triode amp project
  211. Tube Signal to Noise Ratio / Dynamic Range
  212. fluctating bias
  213. Just tried a Wire Wound pot for volume.
  214. LED's in the cathode..
  215. Dr. Arthur Loesch
  216. Counterpoint SA-220 mods
  217. Broskie P-P Bridged Output Stage
  218. Would a member fluent in technical German please have a look at this link?
  219. Damaged tube? EL84
  220. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  221. vk-2100 mod question please
  222. Heater supply
  223. 6111/6n16b - linestage noise problem
  224. OPT specs
  225. Re: Tube Line gain stage with pcc88 or ecc82
  226. Knight-kit KA-55
  227. Can I delay part of a B supply this way?
  228. Tube Preamp turn on circuit
  229. SE GM-70 for 700-800 euro?
  230. filter cap markings
  231. tube buffer noise cancellation
  232. PSUD 2
  233. balancing resister for series capacitor in a power supply
  234. Yaqin MC-100b- TJ Full Music 6sn7
  235. Forgive me for I have sinned. Help with Volume Pot!
  236. Help with diagnoses for leak 20 PLEASE
  237. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  238. Fred Nachbaur SET amp: input capacitor
  239. Heathkit scu 1 and knight kn924 needed schematics
  240. Journey to the centre of a tube..
  241. some questions about an ECL82 SE amp
  242. Heathkit Sine/Square wave Generator Manual needed!
  243. SRPP Signal Output Capacitors
  244. Kt120 screen current
  245. New or used output xformers to play around with?
  246. Magnavox amp
  247. Help hooking up panel ammeter for bias adjust
  248. opt A-440
  249. OTL Headphone amplifier with Tube ED8000
  250. NJ7P Gone?

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