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  1. 01a DHT Preamp
  2. Suitable tubes for Gomes output
  3. phono line stage project
  4. Whats wrong with this circuit?
  5. Any Newcomb Gurus.?
  6. Preamp Tube MU Level?
  7. SRPP Paraccordion topology ?
  8. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  9. Modification of a Chinese KT90 PP amplifier
  10. Tricky Headphone Amp design for AK4396
  11. How to know voltage bias adjustmentwith this data?
  12. Strange Stability Enhancement Trick
  13. has anyone bought tubes from http://www.tangotubes.com/
  14. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  15. Ever heard of British transofmer company "Ro"?
  16. A friend gave me some random tubes...
  17. Replacement for 6e2 without vu
  18. PP GU50 triode strapped project
  19. Tube VAS stage questions???
  20. OT impedance help: 9.8 vs 8k
  21. popping & crackling noise from restored valve AM radio
  22. Choosing 6550 PP Output Transformer
  23. Reversing Interstage Transformer
  24. Aikido 9 pin All in One Build
  25. KT88 PP UL Design Help Needed
  26. Cayin A-300B schematic needed
  27. Please Recommend a Preamp!
  28. Which Antek transforms to use
  29. Integrated Amp as Preamp and Subwoofer amp
  30. Uses for 715C Pulse Tetrode
  31. PP KT-88 w/866A MV HT Supply
  32. EC88 (6DL4) NOS Mullard - any use at all?
  33. Advice sought on thermionic headphone amp
  34. Eico HF-81: Input Selector bypass
  35. 12b4 bass rolloff problem
  36. No Right ch sound on yaqin mc10l
  37. tester causing bias to rise?
  38. Heaters & Filaments: AC vs. DC
  39. Old HP power transformers... need some wiring advice!
  40. RCA RS177H just dosen't sound right! Caps?
  41. silicon or tube rectifier in an EL34 SE
  42. Help original 300G LEGACY
  43. 813 Tube-Steak!
  44. Basic 12AU7 heatrr question
  45. Shipping a vacuum tube to China
  46. 6DJ8/ECC88-SRPP Tube Preamplifier
  47. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  48. Found tons of Tubes,and many other parts
  49. EZ80 Data Sheets, R-Lim and Max Cap
  50. Filament Voltages CT vs Non-CT
  51. Troubleshooting help needed
  52. What is it? Tube guessology
  53. Bass & Treble controls, or rather lack of.
  54. Quicksilver 8417 Power Supply Question
  55. Why a sudden distortion in treble of this SET amplifier?
  56. Antitriode PP with EL34
  57. How to calculate Pout for Push Pull design
  58. Newbie Question - Power Transformer vs Isolation Transformer
  59. All tubes red plating
  60. Exceeding bias voltage?
  61. Vacuum State RTP Preamp Problem
  62. Alfred Morgan Tube Preamplifier
  63. 845 vs GM70
  64. Looking for project suggestions - 12au7 pre-amp?
  65. Contemporary tradition breaking amp schematics.
  66. ul - triode coupled screen grid resistor
  67. Optimum driver valve for an interstage-transformer-driven SE 300B
  68. 6C33C
  69. Soundcraftsmen 5050
  70. Tetra Phono Question
  71. WF tube
  72. Opt laminations isolation
  73. Heretical Source
  74. Broskie auto bias
  75. Heater Wiring - the Good the Bad and the Ugly
  76. Counterpoint SA5000 Help
  77. Problem with ECC83 measurement values - please help
  78. Newbie Bias help ?
  79. AV305m AVVT
  80. Pot mechanical resistance and restoration..
  81. HMV Little Nipper mantle radio = 1 STEREO
  82. What's the simplest way to adjust filament voltage?
  83. GDAP-06
  84. Audio Note L6 - Schematic?
  85. Preventing HV flashover on socket pins
  86. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  87. SE with PP OPT's?
  88. 12ax7/12AT7 Recommendations
  89. HELP: Eimac 75TL amp high frequency roll off
  90. unison reserch s8, let's build it!
  91. Where do super high end companies get their transformers?
  92. Attic find AMP
  93. Help getting Imax and Eb approximations for a push-pull amp
  94. Is this amp OK to buy, or is this a problem?
  95. Swirling Harmonics, can it be described
  96. Line stage with u-follower and nfb
  97. Newbie looking for help, pre-out to tube amp.
  98. Unison research integrated ampliphier schematics
  99. FET CCS anode load and RFI/oscillation.
  100. Old schematic
  101. Newbie Looking for Replacement OPTS Motorola Console Amp
  102. Merlyn- May AudioXpress
  103. How to clean tubes?
  104. does the 3A5 have the stones to drive a 2A3?
  105. New amp: 13DE7 SE hybrid
  106. My amp is motorboating, improve it with b+ regulator ?
  107. Can you identify these amps?
  108. Sowter SA01 - anyone used it ?
  109. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  110. Resistors and combinations
  111. thr light in pcl82
  112. Bogen L330 - Worth restoring?
  113. Those Magnificent Television Tubes
  114. Demagnetizing OPT?
  115. Real DIY fun hybrid testing.
  116. Extreme hum in EQ output
  117. 46 triode-strapped DHT spice model
  118. SET output impedance vs speaker impedance
  119. Help with layout of tube preamp
  120. eico HF-65
  121. Wirewound bias pot problem.
  122. Driver for Telefunken RS242 in class A2
  123. Help on my signal generator
  124. another tube fact or fallacy
  125. Gap in Transformer Lams - OCD Check
  126. how to test...
  127. chinese tube amp
  128. tube/valve pc-80
  129. GM-70 All done
  130. preamp for reciever?
  131. Designing a Tube Rectifier Circuit
  132. Bogen RP40A transformers....what to build with them?
  133. Heads Up for "El Cheapo" Builders
  134. replacing kt66 valves
  135. Help with power transformer identification
  136. 6-8x el84 Per channel
  137. To vary a signal pentode to triode in stages
  138. I have 2 choices for resistive load, need opinions.
  139. Tesla PCC88 7DJ8 dual triode - Help Needed.
  140. PP6550
  141. LT1083 interesting startup problem
  142. ECC33 Driver Stage
  143. Hiraga's Improved Concertina Phase Splitter
  144. 274B a direct replacement for 5AR4/GZ34?
  145. Help power up akai M8 amps
  146. Sonic Frontiers Power 3 Help!
  147. ImPasse Preamp now online
  148. Power supply for tube preamplifier with PCC88
  149. Don't know where to start...
  150. DIY noob
  151. 300B amp cathode bypass
  152. Amp hum with Preamp off
  153. First Project with these tubes
  154. 7189a socket rewiring
  155. Hybrid rectifiers in PSUD2
  156. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  157. About 6AS7BTL Amp
  158. Output Stage Protection Circuit
  159. Silly basic layout question - AC heaters
  160. heater voltage variation for special tubes
  161. Want to build a 807 Vixen.. Looking for help.
  162. Connecting Speakers to Yaqin 10L
  163. Gyrator Filter
  164. 6ab4 tube socket mounting
  165. Any Moto heads? Need OT advice please
  166. Did I break my tube? (new blue glow)
  167. I need help with ccs based LTP
  168. 4033L- rare triode tube.
  169. Single tube linestage schematic wanted: 8CG7
  170. Tetra Sans PS
  171. Tone controls
  172. Vintage Heathkit Electronic Switch as soundcard interface
  173. K-12M extra caps??
  174. Looking for Tube Amp Kit Recommendations
  175. high voltage after cap. change
  176. My first tube amp
  177. Recommendations for 6888 triode operating point?
  178. Mullard 12AX7 part uniformity
  179. 6n15n-EB confusion
  180. Noob Question: Phono Preamp
  181. Transformer data required P782
  182. Snubbers on Power Transformer Secondaries
  183. CCS for 6V6 PP amp
  184. screen voltage for triode strapped pentode
  185. New Driver
  186. purpose and value importance of resistor
  187. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  188. Help with amp please.
  189. Another Discrete Current Source
  190. 834 Triode amp
  191. Determing the reason for mystery? cap in schematic.
  192. Dyna ST70 to Dual-differential EL34 triode amp project
  193. Tube Signal to Noise Ratio / Dynamic Range
  194. fluctating bias
  195. Just tried a Wire Wound pot for volume.
  196. LED's in the cathode..
  197. Dr. Arthur Loesch
  198. Counterpoint SA-220 mods
  199. Broskie P-P Bridged Output Stage
  200. Would a member fluent in technical German please have a look at this link?
  201. Damaged tube? EL84
  202. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  203. vk-2100 mod question please
  204. Heater supply
  205. 6111/6n16b - linestage noise problem
  206. OPT specs
  207. Re: Tube Line gain stage with pcc88 or ecc82
  208. Knight-kit KA-55
  209. Can I delay part of a B supply this way?
  210. Tube Preamp turn on circuit
  211. SE GM-70 for 700-800 euro?
  212. filter cap markings
  213. tube buffer noise cancellation
  214. PSUD 2
  215. balancing resister for series capacitor in a power supply
  216. Yaqin MC-100b- TJ Full Music 6sn7
  217. Forgive me for I have sinned. Help with Volume Pot!
  218. Help with diagnoses for leak 20 PLEASE
  219. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  220. Fred Nachbaur SET amp: input capacitor
  221. Heathkit scu 1 and knight kn924 needed schematics
  222. Journey to the centre of a tube..
  223. some questions about an ECL82 SE amp
  224. Heathkit Sine/Square wave Generator Manual needed!
  225. SRPP Signal Output Capacitors
  226. Kt120 screen current
  227. New or used output xformers to play around with?
  228. Magnavox amp
  229. Help hooking up panel ammeter for bias adjust
  230. opt A-440
  231. OTL Headphone amplifier with Tube ED8000
  232. NJ7P Gone?
  233. MYSTERY METAL TUBES B-1532
  234. noisy tubes
  235. Old amp hum repair
  236. Traveling with DIY Kit in USA-Airport Security Question
  237. Hammond 1650P vs 1650N For EL34 PP
  238. Blown Output Tubes
  239. Kriesler Radiogram refurbishment questions
  240. 6P15P socket connection
  241. Revision 2. Balanced
  242. 6V6 schematic
  243. 6h23N test setting?
  244. 12AH7GT
  245. TUBE Tape Head record / playback amp....
  246. Strange couple comportament 6L6GC RCA black plates.
  247. Reduce Output Volume
  248. Differential Amp CCS Tail SVCS Plate - Noise Issues
  249. Triode curves for EL/PL519
  250. Is that a SRPP circuit with 6SN7?

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