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  1. Best SE interstage 1:1 for min. 15mA?
  2. Dual Single Ended Amplifier? - (not PSE)
  3. RIP Forum Member "Ivey"
  4. valves to replace opamps in cd player
  5. Replacing capacitors on Audio Research D40 power amp.
  6. No sound and low B+?
  7. Replacing capacitors on Audio Research D40 power amp.
  8. 2 Channel Tube Amp and Sub Connection
  9. EZ125 Amp Project
  10. Yaqin MS-22b Phono Amp
  11. First post and a couple P.P. questions
  12. adding a preamp to tube power amp
  13. 6SN7 6N8S preamp suggestions
  14. 300b polarity
  15. Electrolytic capacitor vs extra triode stage
  16. WE JAN 274B Dating
  17. EICO 666 Tester Help
  18. Hickock 550X signal voltage
  19. First Headphone tube amp kit to build??
  20. NOS potted Chicago Transformer 1BC-150
  21. capacitor voltage for tube amp power supply
  22. 808 SE Design Help!
  23. Why can't I build my own ARC LS-5 or CJ PV-12?
  24. Post-mortem on a 80 year old 2A3 amp
  25. 6e5p gm70 with 6d22s?
  26. 6L6-6V6-EL34-KT88-6CA7-EL84
  27. Scheme for SE amp
  28. $16,000
  29. Hybrid power amp
  30. Diagnosis please
  31. monarch 614
  32. Separate Filament and B+ Switches
  33. Dynaco Low Power with 12AY7's
  34. PTP kits available?
  35. Which OP transformer and materials?
  36. Power of Tube Amp and Transistors Amp
  37. testing tubes
  38. current servo not voltage.
  39. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  40. 300b filament
  41. DHT SE auto bias circuit
  42. Anyone try swapping 6SN7 w/ 6F8G
  43. Eliminating Cathode Bypass Caps In SET Amplifier
  44. Nano vacuum tube
  45. Help High Line voltage
  46. Switchable Amp Output?
  47. PCB or hardwire?
  48. 27 line pre amplifier
  49. Mystery tubes on FB?
  50. amplifier discussion
  51. Mikael Abdellah KT88 SE with Cornet2
  52. 5879 to 12AX7 conversion
  53. CCDA SE output stage?
  54. Bravo V2 tube headphone amp - high pitched noise?
  55. Preamp Grounding Question
  56. SE on 300B
  57. musical paradise mp 301
  58. Newbie plan
  59. Can anybody identify this amp?
  60. Old RCA radio; can anyone ID this?
  61. Class AB2 - Kink, how and why?
  62. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  63. CCDA dissimilar triode preamp
  64. NOS NEGLECTED HIGH-END AUDIO TUBE
  65. GOSS C-core suppliers in UK/Europe
  66. Old radio -> tube amplifier
  67. Sowter 8650 in SE
  68. My Russian SET
  69. Raysonic vs. DIY tube amp?
  70. Which pins to use first?
  71. Bypass gain stage on K16LS amp
  72. Schematic help for a Pilot 505 amp please
  73. Question re: Distortion in triode gain stage
  74. Newbie needs help
  75. Marantz Model 9
  76. Is my power transformer bad?
  77. japanese 6v6 amp on youtube, anyone got the link?
  78. First attempt at tube amp.
  79. 6p3s,6N1P,6j1p
  80. 6bq5 p-p diagnosise
  81. MFA Lumi suddenly whistles (on bench)
  82. Pure tetrode and negative g2
  83. ECC85, EL84 tube amp please help.
  84. Pentode buffer.
  85. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  86. Help restoring old Maas-Rowe amp
  87. Early Sansui Valve Amp
  88. mismatched transformer impedance question.
  89. Second-hand or NOS tubes?
  90. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  91. Looking for High voltage double triode
  92. Will this ebay cover fit my Scott 272 integrated amp?
  93. My new find
  94. Thordarson Dual Tone Control
  95. samsung experiments with "tube sound"
  96. PP OPT design
  97. Heater voltage drops?
  98. WE448A data
  99. How come signal input capacitors are not on every amp?
  100. Any body can help to identify this pair of OPTs.
  101. Pre-amp for Tube Sound
  102. Audion tube amp capacitor questions
  103. Hello, looking for advice on a tube project...
  104. Is this speaker a good choice for Tube amps
  105. Suggestions for upgrading my first tube amp!
  106. Why does the Miniwatt N3 have 4 connections to its output transformers?
  107. Anyone know if there is an octal
  108. Cathode Follower, where is the 3d H gone?
  109. Sylvania 45C14M progress.
  110. Collins R-390 Audio Deck
  111. 2 stage 2A3 SET - why does the 6n6p sim so well?
  112. Hi Everyone! Your thoughts on my Yaqin dilemma
  113. Audioromy in Shanghai ?
  114. volume Pot noise
  115. Full Music 300B solid plate sound fine ?
  116. Removing cathode-bypass capacitors, and compensation
  117. Q: UL PP Instability - Anode Grid2 Snubber
  118. The Shuguang SG-50 really support 650V in the plates ???
  119. Addinging windings to an Antek AS-... transformer
  120. Supertex dn2540 CCS Rset trimmer value
  121. help with amp ohms
  122. First Kit
  123. High-End Tube preamp with ECC88
  124. ALERT! WARNING! J. SOUND LAB 300b
  125. Gott 30u tube amp (biggs of ca)
  126. Tips needed for some testing my newly built tube amp
  127. Need help for designing C3g pentode driver for 6b4g se
  128. another circuit idea
  129. EL41 PP triode strapped
  130. Odd-ball PI circuit identification request, and headroom question
  131. b+ Delay Arrangement for Power Amp
  132. Stackin' Chokes
  133. Source of IXYS 10m45s and other CCS devices
  134. Help identifing a 12ax7a
  135. EICO HF-60, rebuild and test
  136. Hum in homebuilt amp
  137. 845 Heater Power supply problems
  138. First Amp Build, (But not complete beginner to electronics)
  139. X10 V3 SERVICE MANUAL
  140. PP kt88 amp problem.
  141. How much power do I need?
  142. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  143. Adding CF to SRPP to lower output impedance?
  144. BCF build
  145. 12vac heater - dc elevated question -
  146. 6V6 VERIABLE TUBE REGULATED
  147. please help identify jennen tube amp.
  148. KEG-EAR 6L6-KT88 PP AUDIO AMP
  149. Aikido LV
  150. RH-84 voltages
  151. RIAA Tube Preamp Build (Part 1)
  152. Hybrid amplifier with ECC88(PCC88) + LM3875
  153. Triode and Input Transformer
  154. RH-84
  155. DL22N
  156. Single Tube Amp
  157. Antique radio info
  158. Alps & Panasonic pots (what's the dael? :: pics)
  159. Vintage GE Tube Amp
  160. Troubleshooting BIG hum problem. CJ CAV-50
  161. Impedance multiplier hybrid parafeed
  162. Crosley 68CR restore
  163. Question for EU diyaudio members
  164. need advises tweaking PSE 300B
  165. CounterPoint SA-12
  166. Bleeder Resistor for Choke Input Supply
  167. Large tube anode connections caps.
  168. Gyrators
  169. newbie questions about 300B tube amp
  170. EL84 SE advice for a beginner
  171. Re: Buffer with tube PCC88
  172. Transformer impedance calcs from windings
  173. Anyone came across AirTight ATM-2 schematic?
  174. Transmitter tube hybrid - Because why not?
  175. where is the output capacitor?
  176. Clarifications on role of pre VS power
  177. My poor man version of the Raven Preamplifier.
  178. GSG problem
  179. Transformer selection/brands
  180. Newbie DC heater help
  181. HF oscillation bursts at low ( < 40Hz) frequencies
  182. Why the GZ34 Rectifiers are so expensive!
  183. OPT designing?
  184. Looking for a DIY repair guy near Toledo or Ft. Wayne
  185. beginner: which DIY kit will go well with these drivers?
  186. Xindak MT-3
  187. Loudness controls
  188. Advice on replacing Yaqin MC-10L
  189. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  190. First Tube Help
  191. ampex 6793 stereo
  192. RCA Victrola 8V91
  193. what to do with these tubes? (6AQ5/6AR5)
  194. Sylvania 45C14M advice
  195. Re-designing 6DJ8 circuit for the 6CG7
  196. Hi fi kits
  197. bias capacitor
  198. Question re: Signal Ground versus HT ground
  199. Schematic to a friend
  200. Newbie question about transformers
  201. Request for suggestions. Akai M8 mono amp schematic validation.
  202. Rectifier
  203. Source for transformer parts?
  204. odd order harmonic squelching?
  205. Best Current Production 6550 / KT88
  206. Wharfedale W12 output transformers
  207. Are we committing suicide?! (Asbestos in vaccum tube base)
  208. Help me to Identify this Tube
  209. GU50 socket blues
  210. New 18W build el84/12ax7
  211. Why a follower in a parafeed triodeamp?
  212. Heads up for Australian tube amp diyers
  213. build new amp from 2 vintage tube amps?
  214. Sansui AU-111 rebuild and need some help
  215. Interstage/Input Transformer
  216. Ergo Ella PP Amplifier Wiring
  217. 6DX8/ECL84/6F3P Baby Huey
  218. Old tube amp info?
  219. MEIXING MING DA MC 2006 Phonostage schematics
  220. Just what the world needs - another EL84 amp
  221. Help me pick el34b tubes
  222. heathkit SA2
  223. Need help on RIAA
  224. GU50 plate curves
  225. What tube is this?
  226. Help with GZ34
  227. Need help in modifying Roberts 770 monoblocks
  228. PP and PPP
  229. ECL82 Single Tube Amp
  230. circuit idea
  231. Need Telefunken Hymnus 5438 Dial Glass
  232. Bias probes/Am I getting true readings
  233. How to measure output power
  234. Oddblock Wooden Case
  235. Amplifier Quandary
  236. Fuse blows instantly
  237. Looking for a fairly simple Hi gain tube pre amp project
  238. Best 2a3 PP OPT.
  239. Sharing cathode resistor and capacitor
  240. Power tubes in cascode for output section?
  241. good tube service tech in Los Angeles?
  242. Proposal for a new sticky thread
  243. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  244. PCF what?
  245. stupid question about heater wire to ground
  246. OTL All American Five? (or Ten)
  247. Scored a very nice H H Scott 272!
  248. Simple DIY Stereo Tube Amp with around 20W
  249. Maton Amp
  250. New Tech

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