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  1. (Weston Ammeter Headphone Amp Redux ?)
  2. Tube guitar amp for acoustic guitar?
  3. Would it be possible to drive a 300b with new power jfets?
  4. Would it be possible to drive a 300b with new power jfets?
  5. Will KT88 increase output power in Copland CTA-402
  6. Music Angel XD-SE EL34 intermittent thump
  7. OPT with cathode feedback
  8. Rebuilding fisher sa-1000
  9. Little Dot Mk IV SE
  10. EF86 on HICKOK 752a tester..??
  11. Choke power supplies and bypassing.
  12. Load resistor on OPT
  13. Ultimate Octal
  14. Help needed for 6H30 output schematic for DAC
  15. KT88 doubt
  16. Leave it on or turn it off?
  17. 6y6 output tube and Fender Champ(ion)
  18. Did I do this loadline correctly
  19. Masco MA-35 rebuild
  20. Motorola SE console amp blown fuse
  21. What to do with Telefunken parts?
  22. OT as buffer?
  23. Single ended EL84 Schematic
  24. Pattern for power xmfr magnetic leaking ?
  25. heater voltage
  26. Small Speakers for 5 channel single ended amp
  27. missing circuit components- why?
  28. valve rectifier series resistors
  29. What to do with a 6N14P/ECC84
  30. Info for very rare neon tubes?
  31. Fender 5F1 Champ clone with triode mode
  32. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  33. Jan Tube question
  34. 60 watt tubeamp with Low B+
  35. What types of SET rock the hardest?
  36. UTC A16 interstage 300B
  37. 6C33
  38. Need wiring schematic for Conn 6050 amp
  39. 6N6P at very low voltage
  40. Transformer Swap
  41. Need help building a tube linestage for my gainclone
  42. Ping SY: His Master's Noise
  43. Wollensak SE 7591 parts projects?
  44. 807 screen voltage help
  45. My little 801A power amplifier
  46. Help needed finding a small DPST switch - confused!
  47. Help with bias pot- wont adjust!
  48. 6N6P / ECC99 / E182CC
  49. bias question
  50. Really low parts could el84 pp design for a beginner?
  51. moviola tubes -- other names?
  52. DHT with TDA1541A in a NOS DAC?
  53. 6C33C-B Tube Tester
  54. VT100mk2 - Retubing
  55. Parallel 6L6 se iron suggestion.
  56. 6N2 Tube Srpp Drive Stage
  57. Unexpectedly good EL84 amp
  58. Kypo Electronic - Buffer, Preamp & Amp kits
  59. PSU bypass cap type
  60. Yaqin MC10-T
  61. Yaqin MC10-L Need help collating data
  62. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  63. 6360 or 6939 as a phase inverter
  64. Peerless 16687 & 7142 Transformer Identification
  65. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  66. Restoration of leak stereo 20: advice pls
  67. DC Tube Heaters
  68. Musical Paradise MP-428 300B Amplifier
  69. Tube regulator
  70. Why overvoltage on HT?
  71. 50c5 schematic question
  72. Me again... matrix decoding w/ tubes?
  73. chapman 305 transformer wiring
  74. tube rolling el34 need advice
  75. Adding resistance to OT circuit.
  76. Tube pre-amp + Class-D amp. any experience?
  77. Bias using a ccs as an anode load
  78. Magnepan High Frequency Tube Amp
  79. Home-Made Plate Curves
  80. Vacuum Tube Audio PH-11
  81. Latest project SRPP valve front end with class D MOSFET output stage.
  82. Melos 400 restoration project - need help (unaltered reference needed)
  83. Comparison of Sovtek 5751 and RCA 5751
  84. Replacing electrolytic caps
  85. Heater supply for the 866a
  86. How good is good enough when designing a line stage?
  87. Cathode/plate resistors ??
  88. Tubes and LTspice?
  89. Is this an oscillation problem? -broskie CCA linestage
  90. Simple Octal SET help.
  91. Capacitor Sanity Check
  92. VTVM substitute?
  93. Caps - Mundorf Silver/oil vs silver/gold/oil
  94. What music/sound style for 845 tubes?
  95. Advice Needed
  96. Favorite ouput tube (SE only)
  97. Best make of audio valves/tubes
  98. How to calculate source impedance for audio transformer?
  99. Schematic for REDDi DI-Box?
  100. what the best kit for Dynaco
  101. That mystery trem cap
  102. A Hot Rodded Bottlehead S.E.X. Amplifier
  103. Cheap Chinese amps
  104. Wanted: Leak ST-50 Mains transformer 240V
  105. Eico HF-20 to bass guitar amp
  106. Ampeg B-18 issue/debug
  107. Who makes their own OPT around here?
  108. 71A
  109. Sound quality chinese tube amplifiers
  110. freeware circuit simulator for Osx (Mac)
  111. 12ax7LP substitute
  112. RH84 SE Build and custom Edcor power transformer
  113. 6l6 se primary impedance choice
  114. Luxman SQ38FD mkII, schematic
  115. 6c33 SET (my next project). Need some feedback
  116. Amorphous iron UMCCC-125: what would you do from it?
  117. Old Fisher SA-300 Amp help!
  118. What kind of sound does a noisy 12B4 make ??
  119. KT88 bias current keeps drifting
  120. Oddball Tube - Useful for Audio??
  121. 12AX7 dual triode "Signal Enhancer/Conditioner"
  122. 2nos of 6l6 in Parallel SE mode
  123. Output transformer selection
  124. 5C8S rectifier psud2 modle/rectifier information
  125. EF80 / KT77 SIngle Ended
  126. Longevity of output tubes in triode vs pentode
  127. Fender champ circuit low output.
  128. ekco ui59 receiver
  129. simple heater question .....
  130. Different Differential Pairs
  131. Decware Zen SET (first project/90% finished)
  132. YL-1200 for audioamp
  133. 7984's
  134. Building First Preamp HELP
  135. Aikido All-In-One Octal B+ measurement.
  136. OPT PP for GU50 Triode ?
  137. Requesting input on preamp schematic
  138. Longer life 6CA7's for class A
  139. Organ split
  140. Two amps done and done!
  141. Testing the 5842/417a on Sencore MU150?
  142. Why Class A Guitar Amplifiers Sound So Good ........
  143. Tube ID
  144. How to best drive an 845?
  145. K-16ls + ton pcb (just finished pics)
  146. Helios + Pultec tube EQ rack prototype.
  147. 12ax7 preamplifier with modified power supply!!! please help!
  148. tube amp prototype with pc
  149. Looking for a new diy project
  150. To James or to Baxandall?
  151. 45 triode : max 275 or 300 vdc ?
  152. Anyone with experience breaking in capacitors out of circuit?
  153. Vt-64/800 tube amp/preamp
  154. Hammond 1609 Output Transformer - EL84
  155. Chinese Capacitors
  156. 60 Watts A Channel 6528A Tube Amp
  157. AC or DC heathing?
  158. 1000W tube amplifier
  159. LEDs or RC?
  160. Is this amp worth bringing back to life?
  161. Melody PM845
  162. Need help troubleshooting this integrated.
  163. Wanted...design for D3a triode strapped driving 45
  164. Removing Tone Controls from VoM Preamp/Amp
  165. Philips 8580 useful anywhere?
  166. output transformer info
  167. 100Hz square preamp responce help
  168. 6P21s 6n21c tube, True Direct Heater?
  169. Convert Dogzilla for Hi-Fi output
  170. Bogen AP-35 Static and Pop from one channel
  171. EL34 PP triode mode hums
  172. Rectifiers
  173. Yaqin MC 10l problem
  174. Stripping Edcor's powder coating
  175. 5Y3 with slow warm up input and output tubes
  176. power transformer question
  177. DHT heaters . and their property"s
  178. Power Tube Cathode Resistor "distance"
  179. Does the same output power from tube amp and ss amp have difference?
  180. 32 Channel Microphone Preamp
  181. Field coil questions
  182. MC240 found in a shed.
  183. "Impossible" circuit which seems to amplify anyway.
  184. EL84 driving EL84 SEP
  185. Tube buffer for MosFet Citation 12
  186. Building a better power Triode
  187. Original KT88? or not
  188. Moscode 300 Upgrade
  189. Onwer's Manual for Realistic SAF-24D
  190. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  191. 6J4 Experiment!
  192. Anyone build Broskie's T8 OTL?
  193. Just WHY are DHT tubes SO Expensive....?
  194. Two chassis grounding
  195. Tubes vs. Caps?
  196. Impedance and output transformer selection question
  197. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  198. peavey tube amplifiers
  199. Stark 9-66 tester repair
  200. 5e7 bandmaster build q's
  201. What kind of tube did I use back then?
  202. Wanted: Vacuum Tube Phono Preamp for PAS
  203. Lower gain in YS Audio linestage
  204. Converting 12FQ8 for 12AX7 , HELP !!!
  205. Transformer Inquiry
  206. Gibson BR-9 Tube Amp Issues
  207. Stromberg-Carlson AU-35 PA Amp for Guitar
  208. Pitfalls of paralleling different resistor brands?
  209. Question about rp and the AC load line
  210. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  211. What is it about SET's?
  212. Help with Power cable on guitar amp
  213. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  214. A small help with russian low voltage tube
  215. Acoustic (not Audio) Alchemy Labs
  216. Mullard 404? ECL82 amp
  217. OP & tube power transormers
  218. EML 300B-XLS Schematic?
  219. Experiences with TAD EL34?
  220. C3g simulation model
  221. ok maybe im just a newb when it comes to amps but...
  222. Yet another compactron to play with...
  223. Weird heater arrangement 12ax7/6bm8
  224. I love SET can we fix what I hate?
  225. Tony's 6H32 pre-amp
  226. rebias guitar amp if using same tubes???
  227. To tone control or not to...
  228. EL84 plate voltage.
  229. 6bx7
  230. Anyone in the L.A. area with scope willing to troubleshoot?
  231. Transformers in series OK?
  232. Russian 6CA4/EZ81 Equivalent?
  233. Amp build recomendation.. for Frazier model sevens
  234. How can I make a DIY AC probe for my DMM
  235. PSUDII Question
  236. EH KT88 Glowing Welds?
  237. Not quite DIY
  238. Searching for a TUBE datasheet GE GL-421
  239. 6EM7 Unit 1
  240. woohoo! RDH4!!!
  241. VTL hum
  242. Use CL-90 to slow 5Y3?
  243. Allen Wright, 1947-2011
  244. Octaves/Ghost notes from Bogen K10. Caps?
  245. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  246. What audio output xfmr for a 6BM8 pp amp?
  247. Parafeeding an EL84 SE(T)
  248. Interesting video from the production of KR tubes
  249. Gassy WE 300b
  250. Bogen Pa Identification 6l6 x 4 dual rectifier

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