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  1. Replacement for 6e2 without vu
  2. PP GU50 triode strapped project
  3. Tube VAS stage questions???
  4. OT impedance help: 9.8 vs 8k
  5. popping & crackling noise from restored valve AM radio
  6. Choosing 6550 PP Output Transformer
  7. Reversing Interstage Transformer
  8. Aikido 9 pin All in One Build
  9. KT88 PP UL Design Help Needed
  10. Cayin A-300B schematic needed
  11. Please Recommend a Preamp!
  12. Which Antek transforms to use
  13. Integrated Amp as Preamp and Subwoofer amp
  14. Uses for 715C Pulse Tetrode
  15. PP KT-88 w/866A MV HT Supply
  16. EC88 (6DL4) NOS Mullard - any use at all?
  17. Advice sought on thermionic headphone amp
  18. Eico HF-81: Input Selector bypass
  19. 12b4 bass rolloff problem
  20. No Right ch sound on yaqin mc10l
  21. tester causing bias to rise?
  22. Heaters & Filaments: AC vs. DC
  23. Old HP power transformers... need some wiring advice!
  24. Old HP power transformers... need some wiring advice!
  25. RCA RS177H just dosen't sound right! Caps?
  26. silicon or tube rectifier in an EL34 SE
  27. Help original 300G LEGACY
  28. 813 Tube-Steak!
  29. Basic 12AU7 heatrr question
  30. Shipping a vacuum tube to China
  31. 6DJ8/ECC88-SRPP Tube Preamplifier
  32. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  33. Found tons of Tubes,and many other parts
  34. Ampeg B15 Heritage Clone Help
  35. EZ80 Data Sheets, R-Lim and Max Cap
  36. Filament Voltages CT vs Non-CT
  37. Troubleshooting help needed
  38. What is it? Tube guessology
  39. Bass & Treble controls, or rather lack of.
  40. Quicksilver 8417 Power Supply Question
  41. Why a sudden distortion in treble of this SET amplifier?
  42. 5f1 Champ grounding
  43. Antitriode PP with EL34
  44. How to calculate Pout for Push Pull design
  45. Newbie Question - Power Transformer vs Isolation Transformer
  46. All tubes red plating
  47. Exceeding bias voltage?
  48. Vacuum State RTP Preamp Problem
  49. Alfred Morgan Tube Preamplifier
  50. 845 vs GM70
  51. Looking for project suggestions - 12au7 pre-amp?
  52. Contemporary tradition breaking amp schematics.
  53. ul - triode coupled screen grid resistor
  54. Optimum driver valve for an interstage-transformer-driven SE 300B
  55. 6C33C
  56. Soundcraftsmen 5050
  57. Tetra Phono Question
  58. WF tube
  59. Opt laminations isolation
  60. Heretical Source
  61. Broskie auto bias
  62. heater wiring - the Good the Bad and the Ugly
  63. AC Line Filter
  64. Counterpoint SA5000 Help
  65. Problem with ECC83 measurement values - please help
  66. Newbie Bias help ?
  67. AV305m AVVT
  68. Pot mechanical resistance and restoration..
  69. HMV Little Nipper mantle radio = 1 STEREO
  70. What's the simplest way to adjust filament voltage?
  71. GDAP-06
  72. Audio Note L6 - Schematic?
  73. Preventing HV flashover on socket pins
  74. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  75. SE with PP OPT's?
  76. 12ax7/12AT7 Recommendations
  77. HELP: Eimac 75TL amp high frequency roll off
  78. unison reserch s8, let's build it!
  79. Where do super high end companies get their transformers?
  80. Tube Tester Panel Meter
  81. Attic find AMP
  82. Help getting Imax and Eb approximations for a push-pull amp
  83. Is this amp OK to buy, or is this a problem?
  84. Swirling Harmonics, can it be described
  85. Line stage with u-follower and nfb
  86. Newbie looking for help, pre-out to tube amp.
  87. Unison research integrated ampliphier schematics
  88. FET CCS anode load and RFI/oscillation.
  89. Old schematic
  90. Newbie Looking for Replacement OPTS Motorola Console Amp
  91. Merlyn- May AudioXpress
  92. How to clean tubes?
  93. does the 3A5 have the stones to drive a 2A3?
  94. New amp: 13DE7 SE hybrid
  95. My amp is motorboating, improve it with b+ regulator ?
  96. Can you identify these amps?
  97. Sowter SA01 - anyone used it ?
  98. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  99. Resistors and combinations
  100. thr light in pcl82
  101. Bogen L330 - Worth restoring?
  102. Supro model 24 amp transformers
  103. Those Magnificent Television Tubes
  104. Demagnetizing OPT?
  105. Real DIY fun hybrid testing.
  106. Extreme hum in EQ output
  107. 46 triode-strapped DHT spice model
  108. SET output impedance vs speaker impedance
  109. Help with layout of tube preamp
  110. eico HF-65
  111. Wirewound bias pot problem.
  112. Driver for Telefunken RS242 in class A2
  113. Help on my signal generator
  114. another tube fact or fallacy
  115. Gap in Transformer Lams - OCD Check
  116. how to test...
  117. chinese tube amp
  118. tube/valve pc-80
  119. GM-70 All done
  120. Peavey 60/60 classic series schematic
  121. preamp for reciever?
  122. Designing a Tube Rectifier Circuit
  123. Bogen RP40A transformers....what to build with them?
  124. Harmony guitar amp restoration questions
  125. Heads Up for "El Cheapo" Builders
  126. replacing kt66 valves
  127. Help with power transformer identification
  128. 6-8x el84 Per channel
  129. To vary a signal pentode to triode in stages
  130. I have 2 choices for resistive load, need opinions.
  131. Tesla PCC88 7DJ8 dual triode - Help Needed.
  132. PP6550
  133. LT1083 interesting startup problem
  134. ECC33 Driver Stage
  135. Hiraga's Improved Concertina Phase Splitter
  136. 274B a direct replacement for 5AR4/GZ34?
  137. Help power up akai M8 amps
  138. Sonic Frontiers Power 3 Help!
  139. ImPasse Preamp now online
  140. Power supply for tube preamplifier with PCC88
  141. Don't know where to start...
  142. DIY noob
  143. 300B amp cathode bypass
  144. Amp hum with Preamp off
  145. First Project with these tubes
  146. 7189a socket rewiring
  147. Hybrid rectifiers in PSUD2
  148. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  149. About 6AS7BTL Amp
  150. Output Stage Protection Circuit
  151. Silly basic layout question - AC heaters
  152. heater voltage variation for special tubes
  153. Want to build a 807 Vixen.. Looking for help.
  154. Connecting Speakers to Yaqin 10L
  155. Gyrator Filter
  156. 6ab4 tube socket mounting
  157. Any Moto heads? Need OT advice please
  158. Did I break my tube? (new blue glow)
  159. I need help with ccs based LTP
  160. 4033L- rare triode tube.
  161. Single tube linestage schematic wanted: 8CG7
  162. Tetra Sans PS
  163. Tone controls
  164. Vintage Heathkit Electronic Switch as soundcard interface
  165. K-12M extra caps??
  166. Looking for Tube Amp Kit Recommendations
  167. magnatone 280 schematic
  168. high voltage after cap. change
  169. My first tube amp
  170. Recommendations for 6888 triode operating point?
  171. Mullard 12AX7 part uniformity
  172. 6n15n-EB confusion
  173. Noob Question: Phono Preamp
  174. Transformer data required P782
  175. Snubbers on Power Transformer Secondaries
  176. CCS for 6V6 PP amp
  177. screen voltage for triode strapped pentode
  178. New Driver
  179. purpose and value importance of resistor
  180. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  181. Help with amp please.
  182. Another Discrete Current Source
  183. 834 Triode amp
  184. Determing the reason for mystery? cap in schematic.
  185. Dyna ST70 to Dual-differential EL34 triode amp project
  186. Tube Signal to Noise Ratio / Dynamic Range
  187. fluctating bias
  188. Just tried a Wire Wound pot for volume.
  189. LED's in the cathode..
  190. Dr. Arthur Loesch
  191. Counterpoint SA-220 mods
  192. Broskie P-P Bridged Output Stage
  193. Would a member fluent in technical German please have a look at this link?
  194. Damaged tube? EL84
  195. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  196. vk-2100 mod question please
  197. Heater supply
  198. 6111/6n16b - linestage noise problem
  199. OPT specs
  200. Re: Tube Line gain stage with pcc88 or ecc82
  201. Knight-kit KA-55
  202. Can I delay part of a B supply this way?
  203. Tube Preamp turn on circuit
  204. SE GM-70 for 700-800 euro?
  205. filter cap markings
  206. tube buffer noise cancellation
  207. PSUD 2
  208. Bypassing filter caps with Smaller caps
  209. balancing resister for series capacitor in a power supply
  210. Yaqin MC-100b- TJ Full Music 6sn7
  211. Forgive me for I have sinned. Help with Volume Pot!
  212. Help with diagnoses for leak 20 PLEASE
  213. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  214. Fred Nachbaur SET amp: input capacitor
  215. Heathkit scu 1 and knight kn924 needed schematics
  216. Journey to the centre of a tube..
  217. RIP Dr Jim Marshall
  218. some questions about an ECL82 SE amp
  219. Heathkit Sine/Square wave Generator Manual needed!
  220. SRPP Signal Output Capacitors
  221. simple se input impedance
  222. Kt120 screen current
  223. New or used output xformers to play around with?
  224. Magnavox amp
  225. Help hooking up panel ammeter for bias adjust
  226. opt A-440
  227. OTL Headphone amplifier with Tube ED8000
  228. NJ7P Gone?
  229. MYSTERY METAL TUBES B-1532
  230. noisy tubes
  231. Old amp hum repair
  232. Traveling with DIY Kit in USA-Airport Security Question
  233. Hammond 1650P vs 1650N For EL34 PP
  234. Calibrate a Hickok 6000?
  235. Blown Output Tubes
  236. Kriesler Radiogram refurbishment questions
  237. 6P15P socket connection
  238. Revision 2. Balanced
  239. 6V6 schematic
  240. 6h23N test setting?
  241. 12AH7GT
  242. TUBE Tape Head record / playback amp....
  243. Strange couple comportament 6L6GC RCA black plates.
  244. Reduce Output Volume
  245. Differential Amp CCS Tail SVCS Plate - Noise Issues
  246. Triode curves for EL/PL519
  247. Is that a SRPP circuit with 6SN7?
  248. KT33 Push Pull
  249. Rogers Cadet III Integrated Amp Capacitor Values help
  250. 2a3 alternative after NOS burning

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