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  1. Ground or amp hum-which?
  2. need help to fix the "hiss" on my tube preamp
  3. Best SE interstage 1:1 for min. 15mA?
  4. Dual Single Ended Amplifier? - (not PSE)
  5. RIP Forum Member "Ivey"
  6. Balanced Buffer Needed with a Balanced Volume Control?
  7. valves to replace opamps in cd player
  8. Replacing capacitors on Audio Research D40 power amp.
  9. No sound and low B+?
  10. Replacing capacitors on Audio Research D40 power amp.
  11. 2 Channel Tube Amp and Sub Connection
  12. EZ125 Amp Project
  13. Yaqin MS-22b Phono Amp
  14. First post and a couple P.P. questions
  15. adding a preamp to tube power amp
  16. 6SN7 6N8S preamp suggestions
  17. 300b polarity
  18. Electrolytic capacitor vs extra triode stage
  19. WE JAN 274B Dating
  20. EICO 666 Tester Help
  21. Hickock 550X signal voltage
  22. First Headphone tube amp kit to build??
  23. Anyone owns a Dynavox VR-307 Amplifier ?
  24. NOS potted Chicago Transformer 1BC-150
  25. capacitor voltage for tube amp power supply
  26. 808 SE Design Help!
  27. Why can't I build my own ARC LS-5 or CJ PV-12?
  28. Post-mortem on a 80 year old 2A3 amp
  29. 6e5p gm70 with 6d22s?
  30. 6L6-6V6-EL34-KT88-6CA7-EL84
  31. Scheme for SE amp
  32. $16,000
  33. Hybrid power amp
  34. Diagnosis please
  35. On now! Jamerson's Ampeg
  36. BK 707 Tube Tester Mods
  37. monarch 614
  38. Separate Filament and B+ Switches
  39. Dynaco Low Power with 12AY7's
  40. PTP kits available?
  41. Which OP transformer and materials?
  42. Power of Tube Amp and Transistors Amp
  43. testing tubes
  44. current servo not voltage.
  45. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  46. 300b filament
  47. DHT SE auto bias circuit
  48. Anyone try swapping 6SN7 w/ 6F8G
  49. Eliminating Cathode Bypass Caps In SET Amplifier
  50. Nano vacuum tube
  51. Help High Line voltage
  52. Switchable Amp Output?
  53. PCB or hardwire?
  54. 27 line pre amplifier
  55. Mystery tubes on FB?
  56. amplifier discussion
  57. Mikael Abdellah KT88 SE with Cornet2
  58. 5879 to 12AX7 conversion
  59. CCDA SE output stage?
  60. Bravo V2 tube headphone amp - high pitched noise?
  61. Preamp Grounding Question
  62. SE on 300B
  63. musical paradise mp 301
  64. Newbie plan
  65. Capacitor Voltage rating Question
  66. Can anybody identify this amp?
  67. Old RCA radio; can anyone ID this?
  68. Class AB2 - Kink, how and why?
  69. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  70. CCDA dissimilar triode preamp
  71. NOS NEGLECTED HIGH-END AUDIO TUBE
  72. GOSS C-core suppliers in UK/Europe
  73. Old radio -> tube amplifier
  74. Sowter 8650 in SE
  75. My Russian SET
  76. Raysonic vs. DIY tube amp?
  77. Which pins to use first?
  78. Bypass gain stage on K16LS amp
  79. Schematic help for a Pilot 505 amp please
  80. Question re: Distortion in triode gain stage
  81. Newbie needs help
  82. Marantz Model 9
  83. Is my power transformer bad?
  84. japanese 6v6 amp on youtube, anyone got the link?
  85. First attempt at tube amp.
  86. 6p3s,6N1P,6j1p
  87. 6bq5 p-p diagnosise
  88. MFA Lumi suddenly whistles (on bench)
  89. Pure tetrode and negative g2
  90. ECC85, EL84 tube amp please help.
  91. Pentode buffer.
  92. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  93. Help restoring old Maas-Rowe amp
  94. Early Sansui Valve Amp
  95. mismatched transformer impedance question.
  96. Second-hand or NOS tubes?
  97. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  98. Looking for High voltage double triode
  99. Will this ebay cover fit my Scott 272 integrated amp?
  100. My new find
  101. Thordarson Dual Tone Control
  102. samsung experiments with "tube sound"
  103. PP OPT design
  104. Heater voltage drops?
  105. WE448A data
  106. How come signal input capacitors are not on every amp?
  107. Any body can help to identify this pair of OPTs.
  108. tubelab SE component mounting
  109. Pre-amp for Tube Sound
  110. Audion tube amp capacitor questions
  111. Capacitor Substitution
  112. Hello, looking for advice on a tube project...
  113. Testing my Tube Tester
  114. Is this speaker a good choice for Tube amps
  115. Suggestions for upgrading my first tube amp!
  116. Why does the Miniwatt N3 have 4 connections to its output transformers?
  117. Anyone know if there is an octal
  118. Cathode Follower, where is the 3d H gone?
  119. Sylvania 45C14M progress.
  120. Collins R-390 Audio Deck
  121. 2 stage 2A3 SET - why does the 6n6p sim so well?
  122. Hi Everyone! Your thoughts on my Yaqin dilemma
  123. Audioromy in Shanghai ?
  124. volume Pot noise
  125. Full Music 300B solid plate sound fine ?
  126. Removing cathode-bypass capacitors, and compensation
  127. Q: UL PP Instability - Anode Grid2 Snubber
  128. The Shuguang SG-50 really support 650V in the plates ???
  129. Addinging windings to an Antek AS-... transformer
  130. Supertex dn2540 CCS Rset trimmer value
  131. help with amp ohms
  132. First Kit
  133. High-End Tube preamp with ECC88
  134. ALERT! WARNING! J. SOUND LAB 300b
  135. Gott 30u tube amp (biggs of ca)
  136. Tips needed for some testing my newly built tube amp
  137. Need help for designing C3g pentode driver for 6b4g se
  138. another circuit idea
  139. EL41 PP triode strapped
  140. Odd-ball PI circuit identification request, and headroom question
  141. b+ Delay Arrangement for Power Amp
  142. Stackin' Chokes
  143. Source of IXYS 10m45s and other CCS devices
  144. Help identifing a 12ax7a
  145. EICO HF-60, rebuild and test
  146. Hum in homebuilt amp
  147. 845 Heater Power supply problems
  148. Tubelab SE choke
  149. First Amp Build, (But not complete beginner to electronics)
  150. X10 V3 SERVICE MANUAL
  151. PP kt88 amp problem.
  152. How much power do I need?
  153. Hickok TV-7 D/U calibration
  154. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  155. Adding CF to SRPP to lower output impedance?
  156. BCF build
  157. 12vac heater - dc elevated question -
  158. 6V6 VERIABLE TUBE REGULATED
  159. please help identify jennen tube amp.
  160. Settings for ECC808 tube on 539c tester
  161. KEG-EAR 6L6-KT88 PP AUDIO AMP
  162. Aikido LV
  163. RH-84 voltages
  164. RIAA Tube Preamp Build (Part 1)
  165. Hybrid amplifier with ECC88(PCC88) + LM3875
  166. Triode and Input Transformer
  167. RH-84
  168. DL22N
  169. Single Tube Amp
  170. Antique radio info
  171. Alps & Panasonic pots (what's the dael? :: pics)
  172. Vintage GE Tube Amp
  173. Troubleshooting BIG hum problem. CJ CAV-50
  174. Impedance multiplier hybrid parafeed
  175. peavey heritage 212
  176. Crosley 68CR restore
  177. Question for EU diyaudio members
  178. need advises tweaking PSE 300B
  179. CounterPoint SA-12
  180. Bleeder Resistor for Choke Input Supply
  181. Large tube anode connections caps.
  182. Gyrators
  183. newbie questions about 300B tube amp
  184. EL84 SE advice for a beginner
  185. Re: Buffer with tube PCC88
  186. Transformer impedance calcs from windings
  187. Anyone came across AirTight ATM-2 schematic?
  188. Transmitter tube hybrid - Because why not?
  189. where is the output capacitor?
  190. Clarifications on role of pre VS power
  191. My poor man version of the Raven Preamplifier.
  192. GSG problem
  193. Transformer selection/brands
  194. Newbie DC heater help
  195. HF oscillation bursts at low ( < 40Hz) frequencies
  196. Why the GZ34 Rectifiers are so expensive!
  197. OPT designing?
  198. Looking for a DIY repair guy near Toledo or Ft. Wayne
  199. beginner: which DIY kit will go well with these drivers?
  200. Xindak MT-3
  201. Loudness controls
  202. Advice on replacing Yaqin MC-10L
  203. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  204. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  205. First Tube Help
  206. ampex 6793 stereo
  207. RCA Victrola 8V91
  208. what to do with these tubes? (6AQ5/6AR5)
  209. Sylvania 45C14M advice
  210. Re-designing 6DJ8 circuit for the 6CG7
  211. Hi fi kits
  212. bias capacitor
  213. Question re: Signal Ground versus HT ground
  214. Schematic to a friend
  215. Newbie question about transformers
  216. Request for suggestions. Akai M8 mono amp schematic validation.
  217. Rectifier
  218. Source for transformer parts?
  219. odd order harmonic squelching?
  220. Best Current Production 6550 / KT88
  221. Wharfedale W12 output transformers
  222. Are we committing suicide?! (Asbestos in vaccum tube base)
  223. Help me to Identify this Tube
  224. GU50 socket blues
  225. New 18W build el84/12ax7
  226. Why a follower in a parafeed triodeamp?
  227. Heads up for Australian tube amp diyers
  228. build new amp from 2 vintage tube amps?
  229. Sansui AU-111 rebuild and need some help
  230. Interstage/Input Transformer
  231. VALVEKING ROYAL8 with 6p14p-EV
  232. Ergo Ella PP Amplifier Wiring
  233. 6DX8/ECL84/6F3P Baby Huey
  234. Old tube amp info?
  235. MEIXING MING DA MC 2006 Phonostage schematics
  236. Problem with a Peavey Classic 50
  237. Just what the world needs - another EL84 amp
  238. Help me pick el34b tubes
  239. heathkit SA2
  240. Need help on RIAA
  241. GU50 plate curves
  242. What tube is this?
  243. Help with GZ34
  244. Need help in modifying Roberts 770 monoblocks
  245. PP and PPP
  246. ECL82 Single Tube Amp
  247. circuit idea
  248. Need Telefunken Hymnus 5438 Dial Glass
  249. Bias probes/Am I getting true readings
  250. How to measure output power

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