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  1. Little Bear P3 ?!?! opinions ?
  2. NOS GU-81
  3. OPT endbell color!
  4. Music Angel kt88 with unbalanced output.. help me!
  5. Heater Supply Center Tap
  6. SCA-35 Pot noise
  7. Conrad Johnson MV 55
  8. Comments on 6C33C-B ARG OTL
  9. Construction tips for high voltage amps.
  10. 6L6 bias
  11. came across Mingda Tube king mono blocks
  12. a lot of noise
  13. El84 pp Amp problem
  14. Power on filament current surge question
  15. Its likely a repost but W/e
  16. Scored some 8236's....
  17. What causes valve to glow red inside ?
  18. Tubes and radioisotope decay
  19. PSUDII Question
  20. DIY Bias Buddy
  21. Recommend me a high power OPT
  22. Design Shorting Tubes?
  23. Microsoft Tube Amp and Speakers
  24. S5 K-16LS Tone Control - Help Please
  25. SEUL Circuit for PL519, has anyone here built this?
  26. Motorola three channel
  27. Your own builders book
  28. WE91A - high frequency roll off
  29. Dynaco MarkIII dimensions
  30. Leak TL12+ smoothing capacitors.
  31. Crate Palomino V8 potentiometer replacement
  32. Question about failing 6550 output
  33. Need help converting Ampex 960 R2R to a preamp...
  34. 5751 SPICE Model -- for Poddwatt II
  35. Configuring an Audio Transformer for 8 Ohmsuring
  36. OTL Blocking cap / RC filter
  37. What do you think..OP Tx
  38. Does anyone have GA399MA.pdf?
  39. New Amp Build, First Post
  40. Twisting HV leads
  41. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  42. Help with AVO MK IV Meter
  43. Why use a pentode?
  44. Filter choke temperature concerns
  45. Is my output transformer damaged?
  46. Parafeed without a cap
  47. Edcor Transformer Problems
  48. From The Daft Idea Department
  49. Do I need a resistor between plates? pic included.
  50. Tube preamp overheating characteristics?
  51. Valve amplifier sounds great
  52. volume pot hum at low and high volume
  53. Thank You
  54. Help Needed ;)
  55. Mullard EL-34: new vs vintage
  56. A new IC for monitoring tubes
  57. 6L6 transformer on EL84
  58. Output transformer design
  59. Tubes4HiFi preamp questions
  60. Newbie advice - Phono Preamp/1st electronics build
  61. Got a HeathKit, now what to do?
  62. 4P1L push pull amp with Lundahl zero global feedback
  63. 12AQ5 SE Amp Issue
  64. ISO a motorboat
  65. Tube characteristic - Originates from pre or power amp tubes?
  66. swapping console amps...
  67. swapping console amps...
  68. Hum issue in PAS Aikido
  69. Hammond Transformer Warranty
  70. 6CB5 in triode PP?
  71. Input capacitance when tube is not conducting
  72. What would you build with these output transformers?
  73. Need help with new tube for my amp
  74. Does the method for loading the plate affect gain of the stage?
  75. Slightly Sick Amplifier
  76. OP Tx for signal tubes in Headphone amps
  77. Listing of Radio Amateur/HAM Flea Markets In Europe
  78. need mac kit 30 transformer
  79. Is this transformer saturation? (pictures inside)
  80. Did I use the LR8 in this EF86 preamp correctly?
  81. Who recognizes the chassis of this amp
  82. Sweep tubes in Push-Pull-Parallel
  83. EZ125 Quad KT88 Project
  84. Need a help! OPT design assistant software
  85. Ready To Build the Other
  86. Harman Kardon Citation II
  87. Relays for tube voltages
  88. Okay, Can someone suggest if this PSU can work
  89. ELROG 211 and 845 tubes
  90. Has anyone tried this tube preamp
  91. filament choke testing
  92. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  93. output transformer sizing - is there such a thing as to big?
  94. Advice for dummies...from a new to the forum dummy
  95. Counterpoint Tech
  96. Line Magnetic 211-IA: Schematic?
  97. Help with harmon kardon a50k
  98. anyone ID these Magnecord amplifiers?
  99. vintage vacuum audio site
  100. Hiraga preamp line+phono 4xECC81 SRPP
  101. Why no simple 2-stage EL34 PP amps?
  102. Dynaco MKIII mod
  103. Blown Up Sir...
  104. Leak stereo20
  105. FFT Hanning Data
  106. Elevated Filament Question
  107. what do you think about this lv linestage?
  108. PCM1798 ECC83/EL84 PP UL balanced combo
  109. I am Trying to Design this Darling Amplifier
  110. Real power pentode recommendation
  111. bridge with CT: can I do that?
  112. Who makes nice pc board for tubes ?
  113. pse300B
  114. 1948 Wireless World - 50 Watt Amp
  115. Akido preamp suggestions.
  116. 6CM5 MKII
  117. DC coupled 6P15P
  118. Switchable 45/VT-52 Amp
  119. Optransformer for 6B4G?
  120. OLSON TUBE AMP AM-158
  121. 6922 preamp idea
  122. Tube SPDIF output
  123. One power tube going hot at idle
  124. schematic to learn by
  125. Audioromy schematic
  126. 8236's
  127. Need a 4060 model on LTSpice
  128. vt86pp 6v6
  129. SALAS hv with 150V
  130. Fender Tweed Champ Kits/Parts
  131. Aikido 12Vac
  132. Looking for expertise in adjusting Williamson amp
  133. Help with elevating a heater supply
  134. Preamp EQ
  135. Need help identifying this amp
  136. Phillips FX737A Rectifier
  137. wiring a transformer on a Scott 299
  138. DC/DC stepup for valve projects
  139. 807 SE Amp
  140. HELP With VOX AC100CPH
  141. Stromberg Carlson ASR 220C blowing fuse
  142. EF806 pentode + CCS
  143. Transformer Identification
  144. Hickok 800A line adjust problem
  145. Heathkit AA 121 parts
  146. Conrad Johnson PV-8: how to convert 110v to 220v
  147. Help me understand Edcor wiring?
  148. Another paralleled to single push-pull EL84 mod.
  149. Sca35 tone controls
  150. Tube preamp noise
  151. Fountek Tube Amp
  152. Choke & Transformer Positioning Problem
  153. The adventure time tube amp- Did any catch it?
  154. Input wiring question
  155. Let's talk triode-pentode
  156. Tried failed, looking for suggestions
  157. Need HELP converting Bogen MX30a pa into a preamp for recording
  158. Edcor Wrong Transformer...
  159. 812A Build
  160. Still not sure where to start
  161. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  162. RCA tube amp woes/hum/ground
  163. EF86 microphony
  164. John Broskie Kits
  165. Refurbish Conrad Johnson Premier Eight
  166. 4tube Philco amp project...
  167. Thoughts on bias for PPP
  168. 2012's Acquired Parts- ..Custom Build Anyone?
  169. Can I use a variable voltage cieling fan switch as a variac?
  170. Audio research LS2 hiss and hum... need help
  171. saba electro sound
  172. Ra on C3g and 6C45pi?
  173. Partial Feedback System
  174. An Electronic Loss Compressor
  175. K-12g one channel louder than the other
  176. Sun SV2a3 or 45?
  177. Red imP(asse)
  178. An application of C-Vac: the SolidGlass amplifier
  179. Fixing crooked laminate stacks?
  180. EF184 driver
  181. Woo Audio WA7 temperature
  182. Resistor w/cap or LED or battery bias?
  183. Transformers Back to back vs. Voltage Doubler
  184. 211: 75W or 100W?
  185. Does really need a balanced preamp ?
  186. Power Transformer Hum
  187. Options for how to use this old tube PA amp? > 200W
  188. Flash getter question
  189. Heath W4 Output Xfmr - anyone measure one??
  190. Tube buffer with 6n3-EV
  191. First time with hi-fi, need some advise with amp desing
  192. Newbie wants to build SET 6C33C
  193. Another PP GU50
  194. SE Waveform
  195. Problem with CCS for filaments
  196. UL / Distributed Load - Screen vs. CFB Winding Ratios
  197. 50W PP - KT88 Build
  198. OP Tx and PPP to PP change over
  199. I need a little more advice on a Glassware Janus shunt regularor
  200. Pentode noise
  201. Dynaco ST-35 Circuits
  202. BIG Transformer Covers - Where to Find?
  203. Amplification breaks up after some time
  204. 6A5G schematic; changes from the 6Y6G tube
  205. ECC83 differential preamp optimisation
  206. 6Y6G SE SCHEMATIC NEEDING HELP!
  207. Need help identifying this tube...
  208. AMI DD project. Someone did some mods before me and I don't know whats what.
  209. (v?)Tailor PA-500 Tube Amp
  210. Transformer arrangement?
  211. Don't be stupid, you can't possibly do that with output transformers?
  212. Maximum Plate/Screen Voltage 6550 in UL
  213. Paper insulation for output transformers?
  214. Best PP OPT 30-100W range
  215. Tripath TA2020 + 6N3 Tube buffer
  216. El34 as triode
  217. tube preamp vol ctrl -- before or after?
  218. matisse preamp -review
  219. Ribbon Microphone Preamp
  220. Looking for tubes 6CL8 pentode Triode with lower output ratings
  221. Reducing Signal Level Without Affecting Tone
  222. VTVM/VOM???
  223. Micro amp - all-tube, direct heated, portable and IT FITS
  224. Wiring a 6AS7G to be Push Pull within its own envelope
  225. Wima MKP
  226. Will this circuit work ?
  227. new amp build
  228. MKP DC-LINK vs electrolytic power supply 4 tube amp
  229. Looking for ECC81
  230. Unison Research S6 (old version) auto or fixed bias?
  231. Troubleshooting a restored Edison 12 valve amplifier
  232. Counterpoint SA-220
  233. LTSpice models needed
  234. Magnavox 6V6 amp upgrade
  235. breadboard for tubes
  236. Looking for ideas... 50W OPTs
  237. SE Power Supply PCB
  238. Speakers for the 16LS Stereo Tube Amplifier
  239. will E80CF fit into yaqin 100b
  240. RH84 Rev2 Build w/Premium parts
  241. Single ended KT88 / 6SN7 not enough power
  242. Problem with push-pull KT88
  243. opinions please!
  244. Tube testing 101?
  245. Top aluminum plate from ProtoPanel.com
  246. 6GK5/300B
  247. Screen driven sweep tubes - the return of the evil kink?
  248. Parafeed 45 amps
  249. Has anyone tried the 6p1p EV?
  250. ECC88 mu-follower

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