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  1. Scored some 8236's....
  2. What causes valve to glow red inside ?
  3. Tubes and radioisotope decay
  4. PSUDII Question
  5. DIY Bias Buddy
  6. Recommend me a high power OPT
  7. Design Shorting Tubes?
  8. Microsoft Tube Amp and Speakers
  9. S5 K-16LS Tone Control - Help Please
  10. SEUL Circuit for PL519, has anyone here built this?
  11. Motorola three channel
  12. Your own builders book
  13. WE91A - high frequency roll off
  14. Dynaco MarkIII dimensions
  15. Leak TL12+ smoothing capacitors.
  16. Question about failing 6550 output
  17. Need help converting Ampex 960 R2R to a preamp...
  18. 5751 SPICE Model -- for Poddwatt II
  19. Configuring an Audio Transformer for 8 Ohmsuring
  20. OTL Blocking cap / RC filter
  21. What do you think..OP Tx
  22. Does anyone have GA399MA.pdf?
  23. New Amp Build, First Post
  24. Twisting HV leads
  25. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  26. Help with AVO MK IV Meter
  27. Why use a pentode?
  28. Filter choke temperature concerns
  29. Is my output transformer damaged?
  30. Parafeed without a cap
  31. Edcor Transformer Problems
  32. From The Daft Idea Department
  33. Do I need a resistor between plates? pic included.
  34. Tube preamp overheating characteristics?
  35. Valve amplifier sounds great
  36. volume pot hum at low and high volume
  37. Thank You
  38. Help Needed ;)
  39. Mullard EL-34: new vs vintage
  40. A new IC for monitoring tubes
  41. 6L6 transformer on EL84
  42. Output transformer design
  43. Tubes4HiFi preamp questions
  44. Newbie advice - Phono Preamp/1st electronics build
  45. Got a HeathKit, now what to do?
  46. 4P1L push pull amp with Lundahl zero global feedback
  47. 12AQ5 SE Amp Issue
  48. ISO a motorboat
  49. Tube characteristic - Originates from pre or power amp tubes?
  50. swapping console amps...
  51. swapping console amps...
  52. Hum issue in PAS Aikido
  53. Hammond Transformer Warranty
  54. 6CB5 in triode PP?
  55. Input capacitance when tube is not conducting
  56. What would you build with these output transformers?
  57. Need help with new tube for my amp
  58. Does the method for loading the plate affect gain of the stage?
  59. Slightly Sick Amplifier
  60. OP Tx for signal tubes in Headphone amps
  61. Listing of Radio Amateur/HAM Flea Markets In Europe
  62. need mac kit 30 transformer
  63. Is this transformer saturation? (pictures inside)
  64. Did I use the LR8 in this EF86 preamp correctly?
  65. Who recognizes the chassis of this amp
  66. Sweep tubes in Push-Pull-Parallel
  67. EZ125 Quad KT88 Project
  68. Need a help! OPT design assistant software
  69. Ready To Build the Other
  70. Harman Kardon Citation II
  71. Relays for tube voltages
  72. Okay, Can someone suggest if this PSU can work
  73. ELROG 211 and 845 tubes
  74. Has anyone tried this tube preamp
  75. filament choke testing
  76. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  77. output transformer sizing - is there such a thing as to big?
  78. Advice for dummies...from a new to the forum dummy
  79. Counterpoint Tech
  80. Line Magnetic 211-IA: Schematic?
  81. Help with harmon kardon a50k
  82. anyone ID these Magnecord amplifiers?
  83. vintage vacuum audio site
  84. Hiraga preamp line+phono 4xECC81 SRPP
  85. Why no simple 2-stage EL34 PP amps?
  86. Dynaco MKIII mod
  87. Blown Up Sir...
  88. Leak stereo20
  89. FFT Hanning Data
  90. Elevated Filament Question
  91. what do you think about this lv linestage?
  92. PCM1798 ECC83/EL84 PP UL balanced combo
  93. I am Trying to Design this Darling Amplifier
  94. Real power pentode recommendation
  95. bridge with CT: can I do that?
  96. Who makes nice pc board for tubes ?
  97. pse300B
  98. 1948 Wireless World - 50 Watt Amp
  99. Akido preamp suggestions.
  100. 6CM5 MKII
  101. DC coupled 6P15P
  102. Switchable 45/VT-52 Amp
  103. Optransformer for 6B4G?
  104. OLSON TUBE AMP AM-158
  105. 6922 preamp idea
  106. Tube SPDIF output
  107. One power tube going hot at idle
  108. schematic to learn by
  109. Audioromy schematic
  110. 8236's
  111. Need a 4060 model on LTSpice
  112. vt86pp 6v6
  113. SALAS hv with 150V
  114. Aikido 12Vac
  115. Looking for expertise in adjusting Williamson amp
  116. Help with elevating a heater supply
  117. Preamp EQ
  118. Need help identifying this amp
  119. Phillips FX737A Rectifier
  120. wiring a transformer on a Scott 299
  121. DC/DC stepup for valve projects
  122. 807 SE Amp
  123. Stromberg Carlson ASR 220C blowing fuse
  124. EF806 pentode + CCS
  125. Transformer Identification
  126. Hickok 800A line adjust problem
  127. Heathkit AA 121 parts
  128. Conrad Johnson PV-8: how to convert 110v to 220v
  129. Help me understand Edcor wiring?
  130. Another paralleled to single push-pull EL84 mod.
  131. Sca35 tone controls
  132. Tube preamp noise
  133. Fountek Tube Amp
  134. Choke & Transformer Positioning Problem
  135. The adventure time tube amp- Did any catch it?
  136. Input wiring question
  137. Let's talk triode-pentode
  138. Tried failed, looking for suggestions
  139. Need HELP converting Bogen MX30a pa into a preamp for recording
  140. Edcor Wrong Transformer...
  141. 812A Build
  142. Still not sure where to start
  143. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  144. RCA tube amp woes/hum/ground
  145. EF86 microphony
  146. John Broskie Kits
  147. Refurbish Conrad Johnson Premier Eight
  148. 4tube Philco amp project...
  149. Thoughts on bias for PPP
  150. 2012's Acquired Parts- ..Custom Build Anyone?
  151. Can I use a variable voltage cieling fan switch as a variac?
  152. Audio research LS2 hiss and hum... need help
  153. saba electro sound
  154. Ra on C3g and 6C45pi?
  155. Partial Feedback System
  156. An Electronic Loss Compressor
  157. K-12g one channel louder than the other
  158. Sun SV2a3 or 45?
  159. Red imP(asse)
  160. An application of C-Vac: the SolidGlass amplifier
  161. Fixing crooked laminate stacks?
  162. EF184 driver
  163. Woo Audio WA7 temperature
  164. Resistor w/cap or LED or battery bias?
  165. Transformers Back to back vs. Voltage Doubler
  166. 211: 75W or 100W?
  167. Does really need a balanced preamp ?
  168. Power Transformer Hum
  169. Options for how to use this old tube PA amp? > 200W
  170. Flash getter question
  171. Heath W4 Output Xfmr - anyone measure one??
  172. Tube buffer with 6n3-EV
  173. First time with hi-fi, need some advise with amp desing
  174. Newbie wants to build SET 6C33C
  175. Another PP GU50
  176. SE Waveform
  177. Problem with CCS for filaments
  178. UL / Distributed Load - Screen vs. CFB Winding Ratios
  179. 50W PP - KT88 Build
  180. OP Tx and PPP to PP change over
  181. I need a little more advice on a Glassware Janus shunt regularor
  182. Pentode noise
  183. Dynaco ST-35 Circuits
  184. BIG Transformer Covers - Where to Find?
  185. Amplification breaks up after some time
  186. 6A5G schematic; changes from the 6Y6G tube
  187. ECC83 differential preamp optimisation
  188. 6Y6G SE SCHEMATIC NEEDING HELP!
  189. Need help identifying this tube...
  190. AMI DD project. Someone did some mods before me and I don't know whats what.
  191. (v?)Tailor PA-500 Tube Amp
  192. Transformer arrangement?
  193. Don't be stupid, you can't possibly do that with output transformers?
  194. Maximum Plate/Screen Voltage 6550 in UL
  195. Paper insulation for output transformers?
  196. Best PP OPT 30-100W range
  197. Tripath TA2020 + 6N3 Tube buffer
  198. El34 as triode
  199. tube preamp vol ctrl -- before or after?
  200. matisse preamp -review
  201. Ribbon Microphone Preamp
  202. Looking for tubes 6CL8 pentode Triode with lower output ratings
  203. Reducing Signal Level Without Affecting Tone
  204. VTVM/VOM???
  205. Micro amp - all-tube, direct heated, portable and IT FITS
  206. Wiring a 6AS7G to be Push Pull within its own envelope
  207. Wima MKP
  208. Will this circuit work ?
  209. new amp build
  210. MKP DC-LINK vs electrolytic power supply 4 tube amp
  211. Looking for ECC81
  212. Unison Research S6 (old version) auto or fixed bias?
  213. Troubleshooting a restored Edison 12 valve amplifier
  214. Counterpoint SA-220
  215. LTSpice models needed
  216. Magnavox 6V6 amp upgrade
  217. breadboard for tubes
  218. Looking for ideas... 50W OPTs
  219. SE Power Supply PCB
  220. Speakers for the 16LS Stereo Tube Amplifier
  221. will E80CF fit into yaqin 100b
  222. RH84 Rev2 Build w/Premium parts
  223. Single ended KT88 / 6SN7 not enough power
  224. Problem with push-pull KT88
  225. opinions please!
  226. Tube testing 101?
  227. Top aluminum plate from ProtoPanel.com
  228. 6GK5/300B
  229. Screen driven sweep tubes - the return of the evil kink?
  230. Parafeed 45 amps
  231. Has anyone tried the 6p1p EV?
  232. ECC88 mu-follower
  233. Reducing gain of a WE91 type amp
  234. 6sn7 mu-follower
  235. AES Preamp mods
  236. Oh! Darling
  237. Testing 3B22 on Hickok 752a
  238. Has anyone ever used the 6C41C in PP?
  239. RH 6V6
  240. Unholtz-Dickie amp, 4-1000's
  241. Somewhat Newbie..
  242. grounding RCA inputs
  243. ESS9018 I/V
  244. Catode follower with 6N7S (6n7GT)
  245. Recommended RIAA Values for this Circuit
  246. PC board design for PSE amp
  247. Audio Research SP-11 HV Regulator
  248. heathkit SA2
  249. russian 1578 tube production years
  250. partial list of tubes I have

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