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  1. Magnavox 88-02 power trans ratings?
  2. Preamp with humming noise!
  3. How to choose line out transformer?
  4. Tools for Cutting Tube Socket Holes?
  5. Switchable SE.
  6. GZ33 in place of 5U4 can it be done?
  7. phase splitter issue
  8. Armstrong A10 MK2 EL34 mono block
  9. "Ug" The Transformer
  10. problems with preamp on home brew
  11. LS180 Tube Socket?
  12. simple question - 5V heater power supply
  13. Lineamp
  14. FI AUDİO 421 A
  15. Pete Millett has another Red Board for sale
  16. Jolida JD9 Problem
  17. 6N11 = 6N1P ?
  18. K12-G tube amp problem
  19. Please vote for one of the schematics.
  20. Advantages of separate PS for input and output stages
  21. Another PCB tube amp design
  22. Help. Replacement OPT sqrueeechhh.
  23. New concept of a power amp
  24. Resurrecting weak tubes
  25. Best DHT heater?
  26. Help requested for EL84 SET amp
  27. What did I buy??
  28. Edcor and Custom Power Transformer Design
  29. What would you make with this power TX?
  30. Lundahl 1676
  31. DHT for 300B problem
  32. Newbie question about output transformer to speaker matching
  33. Red board add-on phono/RIAA pre-amp
  34. 2 Chassis amp
  35. Is It posible to bridge two quad II monoblocks?
  36. Power tube at work picture
  37. Tube SE power amp , which one??
  38. Noise in one channel? Pioneer SX-400
  39. Hartung / Prestla OTL amps
  40. Lafayette Model 417
  41. Extreme plate load
  42. What do you think about this idea
  43. el84pse schem, need advice
  44. Video pentodes as outputs
  45. Chinese "Audio Research" KT88s
  46. New 6C33 Socket
  47. 2a3 PP output transformer
  48. Best SET design?
  49. Anybody ever tried EBC41 as 12AX7 substitute?
  50. The 7242
  51. 12bh7a
  52. Phase Splitter Help
  53. Oscilloscope Question
  54. sizing opt
  55. 6P3C-E Datasheet help
  56. on the toroids again
  57. OPT problem or Something else 6L6 PP
  58. Look what I found!
  59. Help, Diy tube amp
  60. Idea
  61. a few DIY tube amplifier setups
  62. 6L6 PP amp motorboating
  63. Mayer-inspired 4P1L
  64. 6L6 WGB 2X34W STEREO AMPL
  65. Tube Amp DIY or Retail
  66. Supplier for GU50 tubes
  67. 2E26's
  68. Encel Stereophonic M.F.B CSM 40 amplifier
  69. Mono 300B SE Amplifier
  70. Broken tubes for 3D Modelling
  71. Loud hum in one channel
  72. 6EM7 PP question
  73. 12AU7/IRF610 Hybrid Amplifier
  74. RIAA preamplifier
  75. Classic amp, Chinese or scratch-build for Quad ESL?
  76. CLASS A TUBE AMPLIFIER FOR TWEETER
  77. How to gap output transformers?
  78. Cathode bypasses - partial bypass and combination bias
  79. Phase splitter
  80. YS Audio balanced Preamp
  81. Low voltage 12AU7 (19J6) -- re "starving"
  82. phase splitter
  83. Music Angel Meng 6P1
  84. Is it possible to dampen a partially microphonic 12ax7?
  85. Pioneer SA-810 tube amp.
  86. 6C33 D.C.M.B. - Paging Ari Polisois
  87. Whose is this logo?
  88. What is grid resistance of 807/6l6 in pentode
  89. PAS Upgrade Boards by Epperson
  90. Bang and Olufsen 609k stereo se el84 fm tuner
  91. Finished EL34 tube amp... but oscilates weird..
  92. Scope Trace
  93. Drifty tubes
  94. Choosing plate voltage
  95. Determining Zout for SRPP
  96. PX25 amplifier - thoughts?
  97. Testing Ck5703 tubes
  98. When can screen voltage be higher than plate???
  99. 31AL10's
  100. Acoustic (not Audio) Alchemy - I need a wizzard
  101. current feedback
  102. dac with tube buffer/preamp
  103. Sowter 3607
  104. Back to Loftin-White
  105. What to build? (I have a lot of parts)
  106. Grounding chassis through RCA
  107. K40Y-9: Questions And Comments
  108. buffer line stage schematic
  109. Dual triode Thanks for the pre-attenuation link
  110. Help With Alps Volume Pot Noise
  111. 6AM4 driving 45???
  112. Franks 6sn7 line stage question
  113. Recommend me a schematic for El34 or KT88 ?
  114. RH84 Power supply
  115. Pentode driving a SE triode? any experience?
  116. Big tubes thread
  117. Meng Yayi KT88 MonoBlock
  118. Old Dumont Console - Story and Questions
  119. Newbie GlassWare Aikido All in One Questios
  120. Building my 1st tube amp
  121. A good tube for my SE 5K-8 OPT's
  122. 6c33 - ready, SET, GO
  123. Noisy tube rectifier goes quiet when i put my hand NEAR it
  124. Strange ancient looking tube amp
  125. Vintage Dynaco vs. Triode Electronics
  126. LINE PRE - 6N9S - 6dB
  127. Can I balance a diff stage like this?
  128. Ways to design for low IM distortion
  129. Genalex KT88 Plate Dissipation Question
  130. difference between SE and PP transformer
  131. I put a bad ouput tube in my amp, did I hurt it?
  132. Stereo amplifyer project
  133. 6sl7 6sl7 dynaco driver board
  134. PCB for stand alone 5W SE
  135. Triode VS. UL bias
  136. How to test a DIY amp?
  137. Morgan Jones 4th ed
  138. How close is too close when designing an amp
  139. Fatman I tube Problem
  140. 807 p-p tube amp schematic
  141. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  142. James O/P Tx
  143. Ripple reduction with added voltage compensation to HV
  144. SEVETLANA "SV" 6550 C vs 6550 C
  145. Frank's 6SN7 - plate follower, noise
  146. Help running RH807 at higher voltage
  147. Preamp hum issues
  148. EML mesh plate 2a3 in DRD amp
  149. How to run RH807 at 400V?
  150. Preamp Umbilical - Use Shield as Ground Lead?
  151. Automatic Bias Control sliding bias
  152. Edcor Output Transformer Resistance
  153. Would this be worthwile restoring?
  154. Historic Tube Amplifiers
  155. 6HF5 testing
  156. A quick question about NFB
  157. PAS3 - are the tone controls really *that* bad?
  158. PP OPT in SE mode operation?
  159. Cheap 6n6p double ended push-pull idea - thoughts?
  160. Vintage WE Tubes
  161. SE amplifier advice..
  162. Mineature Tubes
  163. MD SM 102b transformer spec's please
  164. Vintage Marconi radio
  165. second order harmonics
  166. Hybrid amplifier
  167. Input caps for Motorola Console Amps
  168. to much gain
  169. Question - Type 19 tube
  170. alternative for footswitch??
  171. Noob. Help PP EL34 / EF86 both as triode schem.
  172. RH84 SE, pentode driver... advice please
  173. Having an issue with a MOSFET in my Blue Hawaii
  174. Info wanted on OPT....
  175. 6P43P Strange Plate Graphs
  176. Multiple Phono preamp
  177. pas filament supply
  178. HV on high voltage amps
  179. Lageschaar hybrid-connection PSE-KT66
  180. First DIY from scratch
  181. Ballance resistors
  182. casing about SOHA I headphone amp
  183. Any interest in 56 various tubes?
  184. Help with exploding tubes!
  185. My new filiment PS for Push Pull GM70
  186. So what exactly do I have here? Heathcraft EA-2
  187. first experience with retro electronics
  188. Revising a tube pre-amp: can't find parts?
  189. Info for Pioneer SA-810 tube amp
  190. Has anyone tried tx2575 in cathode resistor?
  191. 12JZ8
  192. Is it OK to drill mounting holes in transformer laminations?
  193. Seeking Sescom Transformer Specs
  194. Calibrating a Sencor ??
  195. Capacitor in parallel with negative feedback resistor
  196. Old electronics repair store closing. Hartford. FYI. Not related
  197. CL ad for tubes in MA. FYI only. Not connected
  198. Distortion in amp after warm up
  199. Re-bias when changing from Triod to Pentode
  200. Yaqin MC-10L - Electricity in volume knob
  201. Newbie question about a 300B amplifier
  202. Modified Wavebourn Tower II ?
  203. Elevated Heater Voltages - 40v?
  204. Free Tubes!
  205. found tube i like, only small bits of red letter,what tube brands used red lettering?
  206. Impedance problem Of O/P Transformer
  207. Runaway tubes or tubes drawing excess current--baffling
  208. croft SD3 CROFT PREAMP
  209. valve phono stage on a budget
  210. Dynaco vs. Dynaclone
  211. Amplifier Problem - Need help!
  212. Idea for a 6n1p preamp
  213. K & K Audio Two Terminal Constant Current Source
  214. Counterpoint SA-12 wackyness
  215. Shuguang SG-50
  216. manley EQP-1A Tube EQ
  217. El34 PP advice needed
  218. Fosgate Punch 800 a4, diagram needed
  219. Power Transfomer For Valve Amp Question
  220. a 'simpler' tube/valve mixer topology
  221. Qustions about centre speaker connection
  222. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  223. 0d3 for el84 screen regulator
  224. Edcor XPWR059 power problem
  225. Did bootstrapping pot change it's operation
  226. Transformer wiring (Need Help)
  227. Class-d Hybrid
  228. New test data comparing different 7591's
  229. ZKIT2 Zen Triode mono SET amplifier kit
  230. Tango 11146 Output Transformers ?
  231. KT120 Tube
  232. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  233. Mu follower
  234. Aronov LS9100 - any info ???
  235. Tube Preamp Dock
  236. Grounded grid Zout
  237. HY69 in triode mode...some experience ?
  238. ITA LA 1B SCHEMATICS????
  239. Bleeder Resistor (Need Help)
  240. use of 12ax7 and 6v6 as 6T9 alternative?
  241. Positive feedback for amplifier input stage
  242. Rusted OT Issue?
  243. Multiple filament windings
  244. need help with frist tube amp
  245. Testing Western Electric 437a with TV-7D/U ?
  246. Graaf 5050
  247. finished breadboard project
  248. How Much is Too Much Filtering?
  249. 2a3 - for car use?
  250. troubleshooting a Mingda MC34AB

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