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  1. mosfet source follower output stage.
  2. Winter upgrade project - new heating unit
  3. 6KM8 amp
  4. Power and output transformers to ground.
  5. Help with this schematic? B+? B++?
  6. What to do with this old amp? suggestions please.
  7. DIY CAT SL1 preamp
  8. Phase inverter, your comments welcomed!
  9. Basic Bias Question for PP Amp
  10. Oddwatt 5751/6550
  11. Please help me to identify Telefunken PCC ...
  12. Modification of 300B SE Amplifier
  13. 300B Tube and Amp Questions
  14. ST70 "Imposter"
  15. cathode follower question
  16. marconi tubes....can someone idntify these
  17. DeathTrap400 : : A Pretty Damn Good 300B Amp
  18. SOS: First Build, Lots of Hum
  19. KR Audio Marconi R valve amp?
  20. Distortion
  21. Tung-Sol 6098/6AR6 Substitution
  22. Dropout in RTP3 phono stage
  23. Audio Research EC-3 modification
  24. 300b all-DHT SET
  25. My first tube project !
  26. Trouble with homebuilt amp
  27. Music angel el34b problem
  28. The end of tubes?
  29. Two stages EL34 power amplifier
  30. 7199 replacement in AMPEX 6973
  31. IT coupled tube-SS hybrid amp suggestion- needs development
  32. Original Cary CAD-300se upgrades?
  33. Convert Integrated Tube Preamp to an amplifier
  34. McCurdy AM405 Schematics
  35. Looking for Neumann N149 power supply schematic
  36. B&K model 747 tube tester for EL34
  37. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  38. I need datasheet of 8753 tube, help me!
  39. New 6L6GC Project. DC -> LTP
  40. EL84 in UL
  41. 1953 revere amp conversion
  42. Manley transformer specifications
  43. Recommended 300B SE Amplifier Designs
  44. Found a new interstage coupling method (?)
  45. Amplifier Distortion (Northern Electric)
  46. when do filament supplies need to be floated
  47. gm70 filiment transformers
  48. Replacing 6922 Preamp Tube in ARC LS7
  49. Please educate me: Tube testing, the life test, and Grid Leakage
  50. 6AR6 6098 Triode PP Load Line
  51. music reference rm5-4 schematics
  52. S5 K-12G output trans
  53. Transformer center tap question
  54. EF86 + 4*EL84PSE
  55. solid state relays for plate load switching?
  56. Dont have a power transformer?
  57. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  58. Pre-Amp For my Tubelab Simple P-P
  59. Power Transformer Help
  60. Analog Metric 2A3 PP Kit
  61. Good, starter OTL kit
  62. Dual SE amplifier? - (not PSE) - Take two!
  63. Mysterious SE OTL headphone amp from China?!
  64. Inv. Futterman with gain stages between PI and O/P?
  65. PSU configurations for tube amp
  66. HP Model 712b Regulated Power supply
  67. Dynaco low Power Amp
  68. 300b power suply
  69. Very Strange Preamp Issue
  70. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  71. tube transformer suppliers in Mercosur
  72. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  73. time delay sophia electric
  74. Twisting the leads of filter choke
  75. This SPUD's 4 U
  76. I am Looking for tubes
  77. Thuan
  78. Nanjing 6V6GT ( 6P6P)
  79. Should I keep this old stuff?
  80. 300b
  81. ganged output transformers
  82. Holco H4P Resistors, Should I use them?
  83. 6BX8 curves, help !
  84. SANSUI AU-70 or 1000A???
  85. General Electric YTW-1 Tube Checker
  86. Ground or amp hum-which?
  87. need help to fix the "hiss" on my tube preamp
  88. Best SE interstage 1:1 for min. 15mA?
  89. Dual Single Ended Amplifier? - (not PSE)
  90. RIP Forum Member "Ivey"
  91. valves to replace opamps in cd player
  92. Replacing capacitors on Audio Research D40 power amp.
  93. No sound and low B+?
  94. Replacing capacitors on Audio Research D40 power amp.
  95. 2 Channel Tube Amp and Sub Connection
  96. EZ125 Amp Project
  97. Yaqin MS-22b Phono Amp
  98. First post and a couple P.P. questions
  99. adding a preamp to tube power amp
  100. 6SN7 6N8S preamp suggestions
  101. 300b polarity
  102. Electrolytic capacitor vs extra triode stage
  103. WE JAN 274B Dating
  104. EICO 666 Tester Help
  105. Hickock 550X signal voltage
  106. First Headphone tube amp kit to build??
  107. NOS potted Chicago Transformer 1BC-150
  108. capacitor voltage for tube amp power supply
  109. 808 SE Design Help!
  110. Why can't I build my own ARC LS-5 or CJ PV-12?
  111. Post-mortem on a 80 year old 2A3 amp
  112. 6e5p gm70 with 6d22s?
  113. 6L6-6V6-EL34-KT88-6CA7-EL84
  114. Scheme for SE amp
  115. $16,000
  116. Hybrid power amp
  117. Diagnosis please
  118. BK 707 Tube Tester Mods
  119. monarch 614
  120. Separate Filament and B+ Switches
  121. Dynaco Low Power with 12AY7's
  122. PTP kits available?
  123. Which OP transformer and materials?
  124. Power of Tube Amp and Transistors Amp
  125. testing tubes
  126. current servo not voltage.
  127. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  128. 300b filament
  129. DHT SE auto bias circuit
  130. Anyone try swapping 6SN7 w/ 6F8G
  131. Eliminating Cathode Bypass Caps In SET Amplifier
  132. Nano vacuum tube
  133. Help High Line voltage
  134. Switchable Amp Output?
  135. PCB or hardwire?
  136. 27 line pre amplifier
  137. Mystery tubes on FB?
  138. amplifier discussion
  139. Mikael Abdellah KT88 SE with Cornet2
  140. 5879 to 12AX7 conversion
  141. CCDA SE output stage?
  142. Bravo V2 tube headphone amp - high pitched noise?
  143. Preamp Grounding Question
  144. SE on 300B
  145. musical paradise mp 301
  146. Newbie plan
  147. Can anybody identify this amp?
  148. Old RCA radio; can anyone ID this?
  149. Class AB2 - Kink, how and why?
  150. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  151. CCDA dissimilar triode preamp
  152. NOS NEGLECTED HIGH-END AUDIO TUBE
  153. GOSS C-core suppliers in UK/Europe
  154. Old radio -> tube amplifier
  155. Sowter 8650 in SE
  156. My Russian SET
  157. Raysonic vs. DIY tube amp?
  158. Which pins to use first?
  159. Bypass gain stage on K16LS amp
  160. Schematic help for a Pilot 505 amp please
  161. Question re: Distortion in triode gain stage
  162. Newbie needs help
  163. Marantz Model 9
  164. Is my power transformer bad?
  165. japanese 6v6 amp on youtube, anyone got the link?
  166. First attempt at tube amp.
  167. 6p3s,6N1P,6j1p
  168. 6bq5 p-p diagnosise
  169. MFA Lumi suddenly whistles (on bench)
  170. Pure tetrode and negative g2
  171. ECC85, EL84 tube amp please help.
  172. Pentode buffer.
  173. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  174. Help restoring old Maas-Rowe amp
  175. Early Sansui Valve Amp
  176. mismatched transformer impedance question.
  177. Second-hand or NOS tubes?
  178. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  179. Looking for High voltage double triode
  180. Will this ebay cover fit my Scott 272 integrated amp?
  181. My new find
  182. Thordarson Dual Tone Control
  183. samsung experiments with "tube sound"
  184. PP OPT design
  185. Heater voltage drops?
  186. WE448A data
  187. How come signal input capacitors are not on every amp?
  188. Any body can help to identify this pair of OPTs.
  189. tubelab SE component mounting
  190. Pre-amp for Tube Sound
  191. Audion tube amp capacitor questions
  192. Hello, looking for advice on a tube project...
  193. Testing my Tube Tester
  194. Is this speaker a good choice for Tube amps
  195. Suggestions for upgrading my first tube amp!
  196. Why does the Miniwatt N3 have 4 connections to its output transformers?
  197. Anyone know if there is an octal
  198. Cathode Follower, where is the 3d H gone?
  199. Sylvania 45C14M progress.
  200. Collins R-390 Audio Deck
  201. 2 stage 2A3 SET - why does the 6n6p sim so well?
  202. Hi Everyone! Your thoughts on my Yaqin dilemma
  203. Audioromy in Shanghai ?
  204. volume Pot noise
  205. Full Music 300B solid plate sound fine ?
  206. Removing cathode-bypass capacitors, and compensation
  207. Q: UL PP Instability - Anode Grid2 Snubber
  208. The Shuguang SG-50 really support 650V in the plates ???
  209. Addinging windings to an Antek AS-... transformer
  210. Supertex dn2540 CCS Rset trimmer value
  211. help with amp ohms
  212. First Kit
  213. High-End Tube preamp with ECC88
  214. ALERT! WARNING! J. SOUND LAB 300b
  215. Gott 30u tube amp (biggs of ca)
  216. Tips needed for some testing my newly built tube amp
  217. Need help for designing C3g pentode driver for 6b4g se
  218. another circuit idea
  219. EL41 PP triode strapped
  220. Odd-ball PI circuit identification request, and headroom question
  221. b+ Delay Arrangement for Power Amp
  222. Stackin' Chokes
  223. Source of IXYS 10m45s and other CCS devices
  224. Help identifing a 12ax7a
  225. EICO HF-60, rebuild and test
  226. Hum in homebuilt amp
  227. 845 Heater Power supply problems
  228. Tubelab SE choke
  229. First Amp Build, (But not complete beginner to electronics)
  230. X10 V3 SERVICE MANUAL
  231. PP kt88 amp problem.
  232. How much power do I need?
  233. Hickok TV-7 D/U calibration
  234. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  235. Adding CF to SRPP to lower output impedance?
  236. BCF build
  237. 12vac heater - dc elevated question -
  238. 6V6 VERIABLE TUBE REGULATED
  239. please help identify jennen tube amp.
  240. Settings for ECC808 tube on 539c tester
  241. KEG-EAR 6L6-KT88 PP AUDIO AMP
  242. Aikido LV
  243. RH-84 voltages
  244. RIAA Tube Preamp Build (Part 1)
  245. Hybrid amplifier with ECC88(PCC88) + LM3875
  246. Triode and Input Transformer
  247. RH-84
  248. DL22N
  249. Single Tube Amp
  250. Antique radio info

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