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  1. Do I need a resistor between plates? pic included.
  2. Tube preamp overheating characteristics?
  3. Valve amplifier sounds great
  4. volume pot hum at low and high volume
  5. Thank You
  6. Help Needed ;)
  7. Mullard EL-34: new vs vintage
  8. A new IC for monitoring tubes
  9. 6L6 transformer on EL84
  10. Output transformer design
  11. Tubes4HiFi preamp questions
  12. Newbie advice - Phono Preamp/1st electronics build
  13. Got a HeathKit, now what to do?
  14. 4P1L push pull amp with Lundahl zero global feedback
  15. 12AQ5 SE Amp Issue
  16. ISO a motorboat
  17. Tube characteristic - Originates from pre or power amp tubes?
  18. swapping console amps...
  19. swapping console amps...
  20. Hum issue in PAS Aikido
  21. Hammond Transformer Warranty
  22. 6CB5 in triode PP?
  23. Input capacitance when tube is not conducting
  24. What would you build with these output transformers?
  25. Need help with new tube for my amp
  26. Does the method for loading the plate affect gain of the stage?
  27. Slightly Sick Amplifier
  28. OP Tx for signal tubes in Headphone amps
  29. need mac kit 30 transformer
  30. Is this transformer saturation? (pictures inside)
  31. Did I use the LR8 in this EF86 preamp correctly?
  32. Who recognizes the chassis of this amp
  33. Sweep tubes in Push-Pull-Parallel
  34. EZ125 Quad KT88 Project
  35. Need a help! OPT design assistant software
  36. Ready To Build the Other
  37. Harman Kardon Citation II
  38. Relays for tube voltages
  39. Okay, Can someone suggest if this PSU can work
  40. ELROG 211 and 845 tubes
  41. Has anyone tried this tube preamp
  42. filament choke testing
  43. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  44. output transformer sizing - is there such a thing as to big?
  45. Advice for dummies...from a new to the forum dummy
  46. Counterpoint Tech
  47. Line Magnetic 211-IA: Schematic?
  48. Help with harmon kardon a50k
  49. anyone ID these Magnecord amplifiers?
  50. vintage vacuum audio site
  51. Hiraga preamp line+phono 4xECC81 SRPP
  52. Why no simple 2-stage EL34 PP amps?
  53. Dynaco MKIII mod
  54. Blown Up Sir...
  55. Leak stereo20
  56. FFT Hanning Data
  57. Elevated Filament Question
  58. what do you think about this lv linestage?
  59. PCM1798 ECC83/EL84 PP UL balanced combo
  60. I am Trying to Design this Darling Amplifier
  61. Real power pentode recommendation
  62. bridge with CT: can I do that?
  63. Who makes nice pc board for tubes ?
  64. pse300B
  65. 1948 Wireless World - 50 Watt Amp
  66. Akido preamp suggestions.
  67. 6CM5 MKII
  68. DC coupled 6P15P
  69. Switchable 45/VT-52 Amp
  70. Optransformer for 6B4G?
  71. OLSON TUBE AMP AM-158
  72. 6922 preamp idea
  73. Tube SPDIF output
  74. One power tube going hot at idle
  75. schematic to learn by
  76. Audioromy schematic
  77. 8236's
  78. Need a 4060 model on LTSpice
  79. vt86pp 6v6
  80. SALAS hv with 150V
  81. Aikido 12Vac
  82. Looking for expertise in adjusting Williamson amp
  83. Help with elevating a heater supply
  84. Preamp EQ
  85. Need help identifying this amp
  86. Phillips FX737A Rectifier
  87. wiring a transformer on a Scott 299
  88. DC/DC stepup for valve projects
  89. 807 SE Amp
  90. Stromberg Carlson ASR 220C blowing fuse
  91. EF806 pentode + CCS
  92. Transformer Identification
  93. Heathkit AA 121 parts
  94. Conrad Johnson PV-8: how to convert 110v to 220v
  95. Help me understand Edcor wiring?
  96. Another paralleled to single push-pull EL84 mod.
  97. Sca35 tone controls
  98. Tube preamp noise
  99. Fountek Tube Amp
  100. Choke & Transformer Positioning Problem
  101. The adventure time tube amp- Did any catch it?
  102. Input wiring question
  103. Let's talk triode-pentode
  104. Tried failed, looking for suggestions
  105. Need HELP converting Bogen MX30a pa into a preamp for recording
  106. Edcor Wrong Transformer...
  107. 812A Build
  108. Still not sure where to start
  109. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  110. RCA tube amp woes/hum/ground
  111. EF86 microphony
  112. John Broskie Kits
  113. Refurbish Conrad Johnson Premier Eight
  114. 4tube Philco amp project...
  115. Thoughts on bias for PPP
  116. 2012's Acquired Parts- ..Custom Build Anyone?
  117. Can I use a variable voltage cieling fan switch as a variac?
  118. Audio research LS2 hiss and hum... need help
  119. saba electro sound
  120. Ra on C3g and 6C45pi?
  121. Partial Feedback System
  122. An Electronic Loss Compressor
  123. K-12g one channel louder than the other
  124. Sun SV2a3 or 45?
  125. Red imP(asse)
  126. An application of C-Vac: the SolidGlass amplifier
  127. Fixing crooked laminate stacks?
  128. EF184 driver
  129. Woo Audio WA7 temperature
  130. Resistor w/cap or LED or battery bias?
  131. Transformers Back to back vs. Voltage Doubler
  132. 211: 75W or 100W?
  133. Does really need a balanced preamp ?
  134. Power Transformer Hum
  135. Options for how to use this old tube PA amp? > 200W
  136. Flash getter question
  137. Heath W4 Output Xfmr - anyone measure one??
  138. Tube buffer with 6n3-EV
  139. First time with hi-fi, need some advise with amp desing
  140. Newbie wants to build SET 6C33C
  141. Another PP GU50
  142. SE Waveform
  143. Problem with CCS for filaments
  144. UL / Distributed Load - Screen vs. CFB Winding Ratios
  145. 50W PP - KT88 Build
  146. OP Tx and PPP to PP change over
  147. I need a little more advice on a Glassware Janus shunt regularor
  148. Pentode noise
  149. Dynaco ST-35 Circuits
  150. BIG Transformer Covers - Where to Find?
  151. Amplification breaks up after some time
  152. 6A5G schematic; changes from the 6Y6G tube
  153. ECC83 differential preamp optimisation
  154. 6Y6G SE SCHEMATIC NEEDING HELP!
  155. Need help identifying this tube...
  156. AMI DD project. Someone did some mods before me and I don't know whats what.
  157. (v?)Tailor PA-500 Tube Amp
  158. Transformer arrangement?
  159. Don't be stupid, you can't possibly do that with output transformers?
  160. Maximum Plate/Screen Voltage 6550 in UL
  161. Paper insulation for output transformers?
  162. Best PP OPT 30-100W range
  163. Tripath TA2020 + 6N3 Tube buffer
  164. El34 as triode
  165. tube preamp vol ctrl -- before or after?
  166. matisse preamp -review
  167. Ribbon Microphone Preamp
  168. Looking for tubes 6CL8 pentode Triode with lower output ratings
  169. Reducing Signal Level Without Affecting Tone
  170. VTVM/VOM???
  171. Micro amp - all-tube, direct heated, portable and IT FITS
  172. Wiring a 6AS7G to be Push Pull within its own envelope
  173. Wima MKP
  174. Will this circuit work ?
  175. new amp build
  176. Looking for ECC81
  177. Unison Research S6 (old version) auto or fixed bias?
  178. Troubleshooting a restored Edison 12 valve amplifier
  179. Counterpoint SA-220
  180. LTSpice models needed
  181. Magnavox 6V6 amp upgrade
  182. breadboard for tubes
  183. Looking for ideas... 50W OPTs
  184. SE Power Supply PCB
  185. Speakers for the 16LS Stereo Tube Amplifier
  186. will E80CF fit into yaqin 100b
  187. RH84 Rev2 Build w/Premium parts
  188. Single ended KT88 / 6SN7 not enough power
  189. Problem with push-pull KT88
  190. opinions please!
  191. Tube testing 101?
  192. Top aluminum plate from ProtoPanel.com
  193. 6GK5/300B
  194. Screen driven sweep tubes - the return of the evil kink?
  195. Parafeed 45 amps
  196. Has anyone tried the 6p1p EV?
  197. ECC88 mu-follower
  198. Reducing gain of a WE91 type amp
  199. 6sn7 mu-follower
  200. AES Preamp mods
  201. Oh! Darling
  202. Has anyone ever used the 6C41C in PP?
  203. RH 6V6
  204. Unholtz-Dickie amp, 4-1000's
  205. Somewhat Newbie..
  206. grounding RCA inputs
  207. ESS9018 I/V
  208. Catode follower with 6N7S (6n7GT)
  209. Recommended RIAA Values for this Circuit
  210. PC board design for PSE amp
  211. Audio Research SP-11 HV Regulator
  212. heathkit SA2
  213. russian 1578 tube production years
  214. partial list of tubes I have
  215. Bench Power Supply Questions ?
  216. Identify this tube?
  217. your input - bulb / led / neon selection for short tester
  218. Potted choke orientation/amp layout
  219. Tamura F-2012
  220. Joining output windings
  221. 5687 LTSpice model needed
  222. Can you identify this transformer? 70V line matching?
  223. I had to post this..the 211 in all its glory!
  224. Help with preamp/driver/output setup
  225. Accident - Shorted Cathode to grid!!
  226. Correct B+ for EL84 UL PP
  227. RH807 output transformer....what did you use?
  228. Headphone tube amp with balanced output?
  229. Tube buffer with 6n1p-EV
  230. First little SE
  231. ID Nice Unknown Tube
  232. Bell and Howell Model-601
  233. what should my mulit reader be on to bias yaqin 100b
  234. Fixing an old Tandberg Huldra 6 Radio
  235. 30W sweep tube amp
  236. Atmosphère S-40 with KT88, does someone know about this amp?
  237. What happens when Output transformer max voltage (slightly) exceeded?
  238. what type is the best?
  239. Kiwame carbon resistors
  240. Rocker Switch Wiring
  241. RH6550
  242. Diodes for Marantz 8B
  243. Diodes for Marantz 8B
  244. Telefunken 2430 Opus Resistor Burnout
  245. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  246. Conrad Johnson MV40 copy and Fisher OP's
  247. Are EF86 Tubes inherently microphonic?
  248. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  249. Need a rectifier tube...
  250. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.

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