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  1. S5 K-16LS Tone Control - Help Please
  2. SEUL Circuit for PL519, has anyone here built this?
  3. Motorola three channel
  4. Your own builders book
  5. WE91A - high frequency roll off
  6. Dynaco MarkIII dimensions
  7. Leak TL12+ smoothing capacitors.
  8. Crate Palomino V8 potentiometer replacement
  9. Question about failing 6550 output
  10. Need help converting Ampex 960 R2R to a preamp...
  11. 5751 SPICE Model -- for Poddwatt II
  12. Configuring an Audio Transformer for 8 Ohmsuring
  13. OTL Blocking cap / RC filter
  14. What do you think..OP Tx
  15. Does anyone have GA399MA.pdf?
  16. New Amp Build, First Post
  17. Twisting HV leads
  18. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  19. Help with AVO MK IV Meter
  20. Why use a pentode?
  21. Filter choke temperature concerns
  22. Is my output transformer damaged?
  23. Parafeed without a cap
  24. Edcor Transformer Problems
  25. From The Daft Idea Department
  26. Do I need a resistor between plates? pic included.
  27. Tube preamp overheating characteristics?
  28. Valve amplifier sounds great
  29. volume pot hum at low and high volume
  30. Thank You
  31. Help Needed ;)
  32. Mullard EL-34: new vs vintage
  33. A new IC for monitoring tubes
  34. 6L6 transformer on EL84
  35. Output transformer design
  36. Tubes4HiFi preamp questions
  37. Newbie advice - Phono Preamp/1st electronics build
  38. Got a HeathKit, now what to do?
  39. 4P1L push pull amp with Lundahl zero global feedback
  40. 12AQ5 SE Amp Issue
  41. ISO a motorboat
  42. Tube characteristic - Originates from pre or power amp tubes?
  43. swapping console amps...
  44. swapping console amps...
  45. Hum issue in PAS Aikido
  46. Hammond Transformer Warranty
  47. 6CB5 in triode PP?
  48. Input capacitance when tube is not conducting
  49. What would you build with these output transformers?
  50. Need help with new tube for my amp
  51. Does the method for loading the plate affect gain of the stage?
  52. Slightly Sick Amplifier
  53. OP Tx for signal tubes in Headphone amps
  54. Listing of Radio Amateur/HAM Flea Markets In Europe
  55. need mac kit 30 transformer
  56. Is this transformer saturation? (pictures inside)
  57. Did I use the LR8 in this EF86 preamp correctly?
  58. Who recognizes the chassis of this amp
  59. Sweep tubes in Push-Pull-Parallel
  60. EZ125 Quad KT88 Project
  61. Need a help! OPT design assistant software
  62. Ready To Build the Other
  63. Harman Kardon Citation II
  64. Relays for tube voltages
  65. Okay, Can someone suggest if this PSU can work
  66. ELROG 211 and 845 tubes
  67. Has anyone tried this tube preamp
  68. filament choke testing
  69. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  70. output transformer sizing - is there such a thing as to big?
  71. Advice for dummies...from a new to the forum dummy
  72. Counterpoint Tech
  73. Line Magnetic 211-IA: Schematic?
  74. Help with harmon kardon a50k
  75. anyone ID these Magnecord amplifiers?
  76. vintage vacuum audio site
  77. Hiraga preamp line+phono 4xECC81 SRPP
  78. Why no simple 2-stage EL34 PP amps?
  79. Dynaco MKIII mod
  80. Blown Up Sir...
  81. Leak stereo20
  82. FFT Hanning Data
  83. Elevated Filament Question
  84. what do you think about this lv linestage?
  85. PCM1798 ECC83/EL84 PP UL balanced combo
  86. I am Trying to Design this Darling Amplifier
  87. Real power pentode recommendation
  88. bridge with CT: can I do that?
  89. Who makes nice pc board for tubes ?
  90. pse300B
  91. 1948 Wireless World - 50 Watt Amp
  92. Akido preamp suggestions.
  93. 6CM5 MKII
  94. DC coupled 6P15P
  95. Switchable 45/VT-52 Amp
  96. Optransformer for 6B4G?
  97. OLSON TUBE AMP AM-158
  98. 6922 preamp idea
  99. Tube SPDIF output
  100. One power tube going hot at idle
  101. schematic to learn by
  102. Audioromy schematic
  103. 8236's
  104. Need a 4060 model on LTSpice
  105. vt86pp 6v6
  106. SALAS hv with 150V
  107. Fender Tweed Champ Kits/Parts
  108. Aikido 12Vac
  109. Looking for expertise in adjusting Williamson amp
  110. Help with elevating a heater supply
  111. Preamp EQ
  112. Need help identifying this amp
  113. Phillips FX737A Rectifier
  114. wiring a transformer on a Scott 299
  115. DC/DC stepup for valve projects
  116. 807 SE Amp
  117. HELP With VOX AC100CPH
  118. Stromberg Carlson ASR 220C blowing fuse
  119. EF806 pentode + CCS
  120. Transformer Identification
  121. Hickok 800A line adjust problem
  122. Heathkit AA 121 parts
  123. Conrad Johnson PV-8: how to convert 110v to 220v
  124. Help me understand Edcor wiring?
  125. Another paralleled to single push-pull EL84 mod.
  126. Sca35 tone controls
  127. Tube preamp noise
  128. Fountek Tube Amp
  129. Choke & Transformer Positioning Problem
  130. The adventure time tube amp- Did any catch it?
  131. Input wiring question
  132. Let's talk triode-pentode
  133. Tried failed, looking for suggestions
  134. Need HELP converting Bogen MX30a pa into a preamp for recording
  135. Edcor Wrong Transformer...
  136. 812A Build
  137. Still not sure where to start
  138. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  139. RCA tube amp woes/hum/ground
  140. EF86 microphony
  141. John Broskie Kits
  142. Refurbish Conrad Johnson Premier Eight
  143. 4tube Philco amp project...
  144. Thoughts on bias for PPP
  145. 2012's Acquired Parts- ..Custom Build Anyone?
  146. Can I use a variable voltage cieling fan switch as a variac?
  147. Audio research LS2 hiss and hum... need help
  148. saba electro sound
  149. Ra on C3g and 6C45pi?
  150. Partial Feedback System
  151. An Electronic Loss Compressor
  152. K-12g one channel louder than the other
  153. Sun SV2a3 or 45?
  154. Red imP(asse)
  155. An application of C-Vac: the SolidGlass amplifier
  156. Fixing crooked laminate stacks?
  157. EF184 driver
  158. Woo Audio WA7 temperature
  159. Resistor w/cap or LED or battery bias?
  160. Transformers Back to back vs. Voltage Doubler
  161. 211: 75W or 100W?
  162. Does really need a balanced preamp ?
  163. Power Transformer Hum
  164. Options for how to use this old tube PA amp? > 200W
  165. Flash getter question
  166. Heath W4 Output Xfmr - anyone measure one??
  167. Tube buffer with 6n3-EV
  168. First time with hi-fi, need some advise with amp desing
  169. Newbie wants to build SET 6C33C
  170. Another PP GU50
  171. SE Waveform
  172. Problem with CCS for filaments
  173. UL / Distributed Load - Screen vs. CFB Winding Ratios
  174. 50W PP - KT88 Build
  175. OP Tx and PPP to PP change over
  176. I need a little more advice on a Glassware Janus shunt regularor
  177. Pentode noise
  178. Dynaco ST-35 Circuits
  179. BIG Transformer Covers - Where to Find?
  180. Amplification breaks up after some time
  181. 6A5G schematic; changes from the 6Y6G tube
  182. ECC83 differential preamp optimisation
  183. 6Y6G SE SCHEMATIC NEEDING HELP!
  184. Need help identifying this tube...
  185. AMI DD project. Someone did some mods before me and I don't know whats what.
  186. (v?)Tailor PA-500 Tube Amp
  187. Transformer arrangement?
  188. Don't be stupid, you can't possibly do that with output transformers?
  189. Maximum Plate/Screen Voltage 6550 in UL
  190. Paper insulation for output transformers?
  191. Best PP OPT 30-100W range
  192. Tripath TA2020 + 6N3 Tube buffer
  193. El34 as triode
  194. tube preamp vol ctrl -- before or after?
  195. matisse preamp -review
  196. Ribbon Microphone Preamp
  197. Looking for tubes 6CL8 pentode Triode with lower output ratings
  198. Reducing Signal Level Without Affecting Tone
  199. VTVM/VOM???
  200. Micro amp - all-tube, direct heated, portable and IT FITS
  201. Wiring a 6AS7G to be Push Pull within its own envelope
  202. Wima MKP
  203. Will this circuit work ?
  204. new amp build
  205. MKP DC-LINK vs electrolytic power supply 4 tube amp
  206. Looking for ECC81
  207. Unison Research S6 (old version) auto or fixed bias?
  208. Troubleshooting a restored Edison 12 valve amplifier
  209. Counterpoint SA-220
  210. LTSpice models needed
  211. Magnavox 6V6 amp upgrade
  212. breadboard for tubes
  213. Looking for ideas... 50W OPTs
  214. SE Power Supply PCB
  215. Speakers for the 16LS Stereo Tube Amplifier
  216. will E80CF fit into yaqin 100b
  217. RH84 Rev2 Build w/Premium parts
  218. Single ended KT88 / 6SN7 not enough power
  219. Problem with push-pull KT88
  220. opinions please!
  221. Tube testing 101?
  222. Top aluminum plate from ProtoPanel.com
  223. 6GK5/300B
  224. Screen driven sweep tubes - the return of the evil kink?
  225. Parafeed 45 amps
  226. Has anyone tried the 6p1p EV?
  227. ECC88 mu-follower
  228. Reducing gain of a WE91 type amp
  229. 6sn7 mu-follower
  230. AES Preamp mods
  231. Oh! Darling
  232. Testing 3B22 on Hickok 752a
  233. Has anyone ever used the 6C41C in PP?
  234. RH 6V6
  235. Unholtz-Dickie amp, 4-1000's
  236. Somewhat Newbie..
  237. grounding RCA inputs
  238. ESS9018 I/V
  239. Catode follower with 6N7S (6n7GT)
  240. Recommended RIAA Values for this Circuit
  241. PC board design for PSE amp
  242. Audio Research SP-11 HV Regulator
  243. heathkit SA2
  244. russian 1578 tube production years
  245. partial list of tubes I have
  246. Bench Power Supply Questions ?
  247. Identify this tube?
  248. your input - bulb / led / neon selection for short tester
  249. Potted choke orientation/amp layout
  250. Tamura F-2012

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