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  1. Found a new interstage coupling method (?)
  2. Amplifier Distortion (Northern Electric)
  3. when do filament supplies need to be floated
  4. gm70 filiment transformers
  5. Replacing 6922 Preamp Tube in ARC LS7
  6. Please educate me: Tube testing, the life test, and Grid Leakage
  7. 6AR6 6098 Triode PP Load Line
  8. music reference rm5-4 schematics
  9. S5 K-12G output trans
  10. Transformer center tap question
  11. EF86 + 4*EL84PSE
  12. solid state relays for plate load switching?
  13. Dont have a power transformer?
  14. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  15. Pre-Amp For my Tubelab Simple P-P
  16. Power Transformer Help
  17. Analog Metric 2A3 PP Kit
  18. Good, starter OTL kit
  19. Dual SE amplifier? - (not PSE) - Take two!
  20. Mysterious SE OTL headphone amp from China?!
  21. Inv. Futterman with gain stages between PI and O/P?
  22. PSU configurations for tube amp
  23. HP Model 712b Regulated Power supply
  24. Dynaco low Power Amp
  25. 300b power suply
  26. Very Strange Preamp Issue
  27. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  28. tube transformer suppliers in Mercosur
  29. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  30. time delay sophia electric
  31. Twisting the leads of filter choke
  32. This SPUD's 4 U
  33. I am Looking for tubes
  34. Thuan
  35. Nanjing 6V6GT ( 6P6P)
  36. Should I keep this old stuff?
  37. 300b
  38. ganged output transformers
  39. Holco H4P Resistors, Should I use them?
  40. 6BX8 curves, help !
  41. SANSUI AU-70 or 1000A???
  42. General Electric YTW-1 Tube Checker
  43. Ground or amp hum-which?
  44. need help to fix the "hiss" on my tube preamp
  45. Best SE interstage 1:1 for min. 15mA?
  46. Dual Single Ended Amplifier? - (not PSE)
  47. RIP Forum Member "Ivey"
  48. Balanced Buffer Needed with a Balanced Volume Control?
  49. valves to replace opamps in cd player
  50. Replacing capacitors on Audio Research D40 power amp.
  51. No sound and low B+?
  52. Replacing capacitors on Audio Research D40 power amp.
  53. 2 Channel Tube Amp and Sub Connection
  54. EZ125 Amp Project
  55. Yaqin MS-22b Phono Amp
  56. First post and a couple P.P. questions
  57. adding a preamp to tube power amp
  58. 6SN7 6N8S preamp suggestions
  59. 300b polarity
  60. Electrolytic capacitor vs extra triode stage
  61. WE JAN 274B Dating
  62. EICO 666 Tester Help
  63. Hickock 550X signal voltage
  64. First Headphone tube amp kit to build??
  65. Anyone owns a Dynavox VR-307 Amplifier ?
  66. NOS potted Chicago Transformer 1BC-150
  67. capacitor voltage for tube amp power supply
  68. 808 SE Design Help!
  69. Why can't I build my own ARC LS-5 or CJ PV-12?
  70. Post-mortem on a 80 year old 2A3 amp
  71. 6e5p gm70 with 6d22s?
  72. 6L6-6V6-EL34-KT88-6CA7-EL84
  73. Scheme for SE amp
  74. $16,000
  75. Hybrid power amp
  76. Diagnosis please
  77. On now! Jamerson's Ampeg
  78. BK 707 Tube Tester Mods
  79. monarch 614
  80. Separate Filament and B+ Switches
  81. Dynaco Low Power with 12AY7's
  82. PTP kits available?
  83. Which OP transformer and materials?
  84. Power of Tube Amp and Transistors Amp
  85. testing tubes
  86. current servo not voltage.
  87. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  88. 300b filament
  89. DHT SE auto bias circuit
  90. Anyone try swapping 6SN7 w/ 6F8G
  91. Eliminating Cathode Bypass Caps In SET Amplifier
  92. Nano vacuum tube
  93. Help High Line voltage
  94. Switchable Amp Output?
  95. PCB or hardwire?
  96. 27 line pre amplifier
  97. Mystery tubes on FB?
  98. amplifier discussion
  99. Mikael Abdellah KT88 SE with Cornet2
  100. 5879 to 12AX7 conversion
  101. CCDA SE output stage?
  102. Bravo V2 tube headphone amp - high pitched noise?
  103. Preamp Grounding Question
  104. SE on 300B
  105. musical paradise mp 301
  106. Newbie plan
  107. Capacitor Voltage rating Question
  108. Can anybody identify this amp?
  109. Old RCA radio; can anyone ID this?
  110. Class AB2 - Kink, how and why?
  111. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  112. CCDA dissimilar triode preamp
  113. NOS NEGLECTED HIGH-END AUDIO TUBE
  114. GOSS C-core suppliers in UK/Europe
  115. Old radio -> tube amplifier
  116. Sowter 8650 in SE
  117. My Russian SET
  118. Raysonic vs. DIY tube amp?
  119. Which pins to use first?
  120. Bypass gain stage on K16LS amp
  121. Schematic help for a Pilot 505 amp please
  122. Question re: Distortion in triode gain stage
  123. Newbie needs help
  124. Marantz Model 9
  125. Is my power transformer bad?
  126. japanese 6v6 amp on youtube, anyone got the link?
  127. First attempt at tube amp.
  128. 6p3s,6N1P,6j1p
  129. 6bq5 p-p diagnosise
  130. MFA Lumi suddenly whistles (on bench)
  131. Pure tetrode and negative g2
  132. ECC85, EL84 tube amp please help.
  133. Pentode buffer.
  134. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  135. Help restoring old Maas-Rowe amp
  136. Early Sansui Valve Amp
  137. mismatched transformer impedance question.
  138. Second-hand or NOS tubes?
  139. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  140. Looking for High voltage double triode
  141. Will this ebay cover fit my Scott 272 integrated amp?
  142. My new find
  143. Thordarson Dual Tone Control
  144. samsung experiments with "tube sound"
  145. PP OPT design
  146. Heater voltage drops?
  147. WE448A data
  148. How come signal input capacitors are not on every amp?
  149. Any body can help to identify this pair of OPTs.
  150. tubelab SE component mounting
  151. Pre-amp for Tube Sound
  152. Audion tube amp capacitor questions
  153. Capacitor Substitution
  154. Hello, looking for advice on a tube project...
  155. Testing my Tube Tester
  156. Is this speaker a good choice for Tube amps
  157. Suggestions for upgrading my first tube amp!
  158. Why does the Miniwatt N3 have 4 connections to its output transformers?
  159. Anyone know if there is an octal
  160. Cathode Follower, where is the 3d H gone?
  161. Sylvania 45C14M progress.
  162. Collins R-390 Audio Deck
  163. 2 stage 2A3 SET - why does the 6n6p sim so well?
  164. Hi Everyone! Your thoughts on my Yaqin dilemma
  165. Audioromy in Shanghai ?
  166. volume Pot noise
  167. Full Music 300B solid plate sound fine ?
  168. Removing cathode-bypass capacitors, and compensation
  169. Q: UL PP Instability - Anode Grid2 Snubber
  170. The Shuguang SG-50 really support 650V in the plates ???
  171. Addinging windings to an Antek AS-... transformer
  172. Supertex dn2540 CCS Rset trimmer value
  173. help with amp ohms
  174. First Kit
  175. High-End Tube preamp with ECC88
  176. ALERT! WARNING! J. SOUND LAB 300b
  177. Gott 30u tube amp (biggs of ca)
  178. Tips needed for some testing my newly built tube amp
  179. Need help for designing C3g pentode driver for 6b4g se
  180. another circuit idea
  181. EL41 PP triode strapped
  182. Odd-ball PI circuit identification request, and headroom question
  183. b+ Delay Arrangement for Power Amp
  184. Stackin' Chokes
  185. Source of IXYS 10m45s and other CCS devices
  186. Help identifing a 12ax7a
  187. EICO HF-60, rebuild and test
  188. Hum in homebuilt amp
  189. 845 Heater Power supply problems
  190. Tubelab SE choke
  191. First Amp Build, (But not complete beginner to electronics)
  192. X10 V3 SERVICE MANUAL
  193. PP kt88 amp problem.
  194. How much power do I need?
  195. Hickok TV-7 D/U calibration
  196. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  197. Adding CF to SRPP to lower output impedance?
  198. BCF build
  199. 12vac heater - dc elevated question -
  200. 6V6 VERIABLE TUBE REGULATED
  201. please help identify jennen tube amp.
  202. Settings for ECC808 tube on 539c tester
  203. KEG-EAR 6L6-KT88 PP AUDIO AMP
  204. Aikido LV
  205. RH-84 voltages
  206. RIAA Tube Preamp Build (Part 1)
  207. Hybrid amplifier with ECC88(PCC88) + LM3875
  208. Triode and Input Transformer
  209. RH-84
  210. DL22N
  211. Single Tube Amp
  212. Antique radio info
  213. Alps & Panasonic pots (what's the dael? :: pics)
  214. Vintage GE Tube Amp
  215. Troubleshooting BIG hum problem. CJ CAV-50
  216. Impedance multiplier hybrid parafeed
  217. peavey heritage 212
  218. Crosley 68CR restore
  219. Question for EU diyaudio members
  220. need advises tweaking PSE 300B
  221. CounterPoint SA-12
  222. Bleeder Resistor for Choke Input Supply
  223. Large tube anode connections caps.
  224. Gyrators
  225. newbie questions about 300B tube amp
  226. EL84 SE advice for a beginner
  227. Re: Buffer with tube PCC88
  228. Transformer impedance calcs from windings
  229. Anyone came across AirTight ATM-2 schematic?
  230. Transmitter tube hybrid - Because why not?
  231. where is the output capacitor?
  232. Clarifications on role of pre VS power
  233. My poor man version of the Raven Preamplifier.
  234. GSG problem
  235. Transformer selection/brands
  236. Newbie DC heater help
  237. HF oscillation bursts at low ( < 40Hz) frequencies
  238. Why the GZ34 Rectifiers are so expensive!
  239. OPT designing?
  240. Looking for a DIY repair guy near Toledo or Ft. Wayne
  241. beginner: which DIY kit will go well with these drivers?
  242. Xindak MT-3
  243. Loudness controls
  244. Advice on replacing Yaqin MC-10L
  245. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  246. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  247. First Tube Help
  248. ampex 6793 stereo
  249. RCA Victrola 8V91
  250. what to do with these tubes? (6AQ5/6AR5)

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