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  1. Modification of 300B SE Amplifier
  2. 300B Tube and Amp Questions
  3. ST70 "Imposter"
  4. cathode follower question
  5. marconi tubes....can someone idntify these
  6. DeathTrap400 : : A Pretty Damn Good 300B Amp
  7. SOS: First Build, Lots of Hum
  8. KR Audio Marconi R valve amp?
  9. Distortion
  10. Tung-Sol 6098/6AR6 Substitution
  11. Dropout in RTP3 phono stage
  12. Audio Research EC-3 modification
  13. 300b all-DHT SET
  14. My first tube project !
  15. Trouble with homebuilt amp
  16. Music angel el34b problem
  17. The end of tubes?
  18. Two stages EL34 power amplifier
  19. 7199 replacement in AMPEX 6973
  20. IT coupled tube-SS hybrid amp suggestion- needs development
  21. Original Cary CAD-300se upgrades?
  22. Convert Integrated Tube Preamp to an amplifier
  23. McCurdy AM405 Schematics
  24. Looking for Neumann N149 power supply schematic
  25. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  26. I need datasheet of 8753 tube, help me!
  27. New 6L6GC Project. DC -> LTP
  28. EL84 in UL
  29. 1953 revere amp conversion
  30. Manley transformer specifications
  31. Recommended 300B SE Amplifier Designs
  32. Found a new interstage coupling method (?)
  33. Amplifier Distortion (Northern Electric)
  34. when do filament supplies need to be floated
  35. gm70 filiment transformers
  36. Replacing 6922 Preamp Tube in ARC LS7
  37. Please educate me: Tube testing, the life test, and Grid Leakage
  38. 6AR6 6098 Triode PP Load Line
  39. music reference rm5-4 schematics
  40. S5 K-12G output trans
  41. Transformer center tap question
  42. EF86 + 4*EL84PSE
  43. solid state relays for plate load switching?
  44. Dont have a power transformer?
  45. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  46. Power Transformer Help
  47. Analog Metric 2A3 PP Kit
  48. Good, starter OTL kit
  49. Dual SE amplifier? - (not PSE) - Take two!
  50. Mysterious SE OTL headphone amp from China?!
  51. Inv. Futterman with gain stages between PI and O/P?
  52. PSU configurations for tube amp
  53. HP Model 712b Regulated Power supply
  54. Dynaco low Power Amp
  55. 300b power suply
  56. Very Strange Preamp Issue
  57. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  58. tube transformer suppliers in Mercosur
  59. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  60. time delay sophia electric
  61. Twisting the leads of filter choke
  62. This SPUD's 4 U
  63. I am Looking for tubes
  64. Thuan
  65. Nanjing 6V6GT ( 6P6P)
  66. Should I keep this old stuff?
  67. 300b
  68. ganged output transformers
  69. Holco H4P Resistors, Should I use them?
  70. 6BX8 curves, help !
  71. SANSUI AU-70 or 1000A???
  72. General Electric YTW-1 Tube Checker
  73. Ground or amp hum-which?
  74. need help to fix the "hiss" on my tube preamp
  75. Best SE interstage 1:1 for min. 15mA?
  76. Dual Single Ended Amplifier? - (not PSE)
  77. RIP Forum Member "Ivey"
  78. valves to replace opamps in cd player
  79. Replacing capacitors on Audio Research D40 power amp.
  80. No sound and low B+?
  81. Replacing capacitors on Audio Research D40 power amp.
  82. 2 Channel Tube Amp and Sub Connection
  83. EZ125 Amp Project
  84. Yaqin MS-22b Phono Amp
  85. First post and a couple P.P. questions
  86. adding a preamp to tube power amp
  87. 6SN7 6N8S preamp suggestions
  88. 300b polarity
  89. Electrolytic capacitor vs extra triode stage
  90. WE JAN 274B Dating
  91. EICO 666 Tester Help
  92. Hickock 550X signal voltage
  93. First Headphone tube amp kit to build??
  94. NOS potted Chicago Transformer 1BC-150
  95. capacitor voltage for tube amp power supply
  96. 808 SE Design Help!
  97. Why can't I build my own ARC LS-5 or CJ PV-12?
  98. Post-mortem on a 80 year old 2A3 amp
  99. 6e5p gm70 with 6d22s?
  100. 6L6-6V6-EL34-KT88-6CA7-EL84
  101. Scheme for SE amp
  102. $16,000
  103. Hybrid power amp
  104. Diagnosis please
  105. monarch 614
  106. Separate Filament and B+ Switches
  107. Dynaco Low Power with 12AY7's
  108. PTP kits available?
  109. Which OP transformer and materials?
  110. Power of Tube Amp and Transistors Amp
  111. testing tubes
  112. current servo not voltage.
  113. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  114. 300b filament
  115. DHT SE auto bias circuit
  116. Anyone try swapping 6SN7 w/ 6F8G
  117. Eliminating Cathode Bypass Caps In SET Amplifier
  118. Nano vacuum tube
  119. Help High Line voltage
  120. Switchable Amp Output?
  121. PCB or hardwire?
  122. 27 line pre amplifier
  123. Mystery tubes on FB?
  124. amplifier discussion
  125. Mikael Abdellah KT88 SE with Cornet2
  126. 5879 to 12AX7 conversion
  127. CCDA SE output stage?
  128. Bravo V2 tube headphone amp - high pitched noise?
  129. Preamp Grounding Question
  130. SE on 300B
  131. musical paradise mp 301
  132. Newbie plan
  133. Can anybody identify this amp?
  134. Old RCA radio; can anyone ID this?
  135. Class AB2 - Kink, how and why?
  136. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  137. CCDA dissimilar triode preamp
  138. NOS NEGLECTED HIGH-END AUDIO TUBE
  139. GOSS C-core suppliers in UK/Europe
  140. Old radio -> tube amplifier
  141. Sowter 8650 in SE
  142. My Russian SET
  143. Raysonic vs. DIY tube amp?
  144. Which pins to use first?
  145. Bypass gain stage on K16LS amp
  146. Schematic help for a Pilot 505 amp please
  147. Question re: Distortion in triode gain stage
  148. Newbie needs help
  149. Marantz Model 9
  150. Is my power transformer bad?
  151. japanese 6v6 amp on youtube, anyone got the link?
  152. First attempt at tube amp.
  153. 6p3s,6N1P,6j1p
  154. 6bq5 p-p diagnosise
  155. MFA Lumi suddenly whistles (on bench)
  156. Pure tetrode and negative g2
  157. ECC85, EL84 tube amp please help.
  158. Pentode buffer.
  159. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  160. Help restoring old Maas-Rowe amp
  161. Early Sansui Valve Amp
  162. mismatched transformer impedance question.
  163. Second-hand or NOS tubes?
  164. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  165. Looking for High voltage double triode
  166. Will this ebay cover fit my Scott 272 integrated amp?
  167. My new find
  168. Thordarson Dual Tone Control
  169. samsung experiments with "tube sound"
  170. PP OPT design
  171. Heater voltage drops?
  172. WE448A data
  173. How come signal input capacitors are not on every amp?
  174. Any body can help to identify this pair of OPTs.
  175. Pre-amp for Tube Sound
  176. Audion tube amp capacitor questions
  177. Hello, looking for advice on a tube project...
  178. Is this speaker a good choice for Tube amps
  179. Suggestions for upgrading my first tube amp!
  180. Why does the Miniwatt N3 have 4 connections to its output transformers?
  181. Anyone know if there is an octal
  182. Cathode Follower, where is the 3d H gone?
  183. Sylvania 45C14M progress.
  184. Collins R-390 Audio Deck
  185. 2 stage 2A3 SET - why does the 6n6p sim so well?
  186. Hi Everyone! Your thoughts on my Yaqin dilemma
  187. Audioromy in Shanghai ?
  188. volume Pot noise
  189. Full Music 300B solid plate sound fine ?
  190. Removing cathode-bypass capacitors, and compensation
  191. Q: UL PP Instability - Anode Grid2 Snubber
  192. The Shuguang SG-50 really support 650V in the plates ???
  193. Addinging windings to an Antek AS-... transformer
  194. Supertex dn2540 CCS Rset trimmer value
  195. help with amp ohms
  196. First Kit
  197. High-End Tube preamp with ECC88
  198. ALERT! WARNING! J. SOUND LAB 300b
  199. Gott 30u tube amp (biggs of ca)
  200. Tips needed for some testing my newly built tube amp
  201. Need help for designing C3g pentode driver for 6b4g se
  202. another circuit idea
  203. EL41 PP triode strapped
  204. Odd-ball PI circuit identification request, and headroom question
  205. b+ Delay Arrangement for Power Amp
  206. Stackin' Chokes
  207. Source of IXYS 10m45s and other CCS devices
  208. Help identifing a 12ax7a
  209. EICO HF-60, rebuild and test
  210. Hum in homebuilt amp
  211. 845 Heater Power supply problems
  212. First Amp Build, (But not complete beginner to electronics)
  213. X10 V3 SERVICE MANUAL
  214. PP kt88 amp problem.
  215. How much power do I need?
  216. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  217. Adding CF to SRPP to lower output impedance?
  218. BCF build
  219. 12vac heater - dc elevated question -
  220. 6V6 VERIABLE TUBE REGULATED
  221. please help identify jennen tube amp.
  222. KEG-EAR 6L6-KT88 PP AUDIO AMP
  223. Aikido LV
  224. RH-84 voltages
  225. RIAA Tube Preamp Build (Part 1)
  226. Hybrid amplifier with ECC88(PCC88) + LM3875
  227. Triode and Input Transformer
  228. RH-84
  229. DL22N
  230. Single Tube Amp
  231. Antique radio info
  232. Alps & Panasonic pots (what's the dael? :: pics)
  233. Vintage GE Tube Amp
  234. Troubleshooting BIG hum problem. CJ CAV-50
  235. Impedance multiplier hybrid parafeed
  236. Crosley 68CR restore
  237. Question for EU diyaudio members
  238. need advises tweaking PSE 300B
  239. CounterPoint SA-12
  240. Bleeder Resistor for Choke Input Supply
  241. Large tube anode connections caps.
  242. Gyrators
  243. newbie questions about 300B tube amp
  244. EL84 SE advice for a beginner
  245. Re: Buffer with tube PCC88
  246. Transformer impedance calcs from windings
  247. Anyone came across AirTight ATM-2 schematic?
  248. Transmitter tube hybrid - Because why not?
  249. where is the output capacitor?
  250. Clarifications on role of pre VS power

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