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  1. HMV Little Nipper mantle radio = 1 STEREO
  2. What's the simplest way to adjust filament voltage?
  3. GDAP-06
  4. Audio Note L6 - Schematic?
  5. Preventing HV flashover on socket pins
  6. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  7. SE with PP OPT's?
  8. 12ax7/12AT7 Recommendations
  9. HELP: Eimac 75TL amp high frequency roll off
  10. unison reserch s8, let's build it!
  11. Where do super high end companies get their transformers?
  12. Tube Tester Panel Meter
  13. Attic find AMP
  14. Help getting Imax and Eb approximations for a push-pull amp
  15. Is this amp OK to buy, or is this a problem?
  16. Swirling Harmonics, can it be described
  17. Line stage with u-follower and nfb
  18. Newbie looking for help, pre-out to tube amp.
  19. Unison research integrated ampliphier schematics
  20. FET CCS anode load and RFI/oscillation.
  21. Old schematic
  22. Newbie Looking for Replacement OPTS Motorola Console Amp
  23. Merlyn- May AudioXpress
  24. How to clean tubes?
  25. does the 3A5 have the stones to drive a 2A3?
  26. New amp: 13DE7 SE hybrid
  27. My amp is motorboating, improve it with b+ regulator ?
  28. Can you identify these amps?
  29. Sowter SA01 - anyone used it ?
  30. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  31. Resistors and combinations
  32. thr light in pcl82
  33. Bogen L330 - Worth restoring?
  34. Supro model 24 amp transformers
  35. Those Magnificent Television Tubes
  36. Demagnetizing OPT?
  37. Real DIY fun hybrid testing.
  38. Extreme hum in EQ output
  39. 46 triode-strapped DHT spice model
  40. SET output impedance vs speaker impedance
  41. Help with layout of tube preamp
  42. eico HF-65
  43. Wirewound bias pot problem.
  44. Driver for Telefunken RS242 in class A2
  45. Help on my signal generator
  46. another tube fact or fallacy
  47. Gap in Transformer Lams - OCD Check
  48. how to test...
  49. chinese tube amp
  50. tube/valve pc-80
  51. GM-70 All done
  52. Peavey 60/60 classic series schematic
  53. preamp for reciever?
  54. Designing a Tube Rectifier Circuit
  55. Bogen RP40A transformers....what to build with them?
  56. Harmony guitar amp restoration questions
  57. Heads Up for "El Cheapo" Builders
  58. replacing kt66 valves
  59. Help with power transformer identification
  60. 6-8x el84 Per channel
  61. To vary a signal pentode to triode in stages
  62. I have 2 choices for resistive load, need opinions.
  63. Tesla PCC88 7DJ8 dual triode - Help Needed.
  64. PP6550
  65. LT1083 interesting startup problem
  66. ECC33 Driver Stage
  67. Hiraga's Improved Concertina Phase Splitter
  68. 274B a direct replacement for 5AR4/GZ34?
  69. Help power up akai M8 amps
  70. Sonic Frontiers Power 3 Help!
  71. ImPasse Preamp now online
  72. Power supply for tube preamplifier with PCC88
  73. Don't know where to start...
  74. DIY noob
  75. 300B amp cathode bypass
  76. Amp hum with Preamp off
  77. First Project with these tubes
  78. 7189a socket rewiring
  79. Hybrid rectifiers in PSUD2
  80. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  81. About 6AS7BTL Amp
  82. Output Stage Protection Circuit
  83. Silly basic layout question - AC heaters
  84. heater voltage variation for special tubes
  85. Want to build a 807 Vixen.. Looking for help.
  86. Connecting Speakers to Yaqin 10L
  87. Gyrator Filter
  88. 6ab4 tube socket mounting
  89. Any Moto heads? Need OT advice please
  90. Did I break my tube? (new blue glow)
  91. I need help with ccs based LTP
  92. 4033L- rare triode tube.
  93. Single tube linestage schematic wanted: 8CG7
  94. Tetra Sans PS
  95. Tone controls
  96. Vintage Heathkit Electronic Switch as soundcard interface
  97. K-12M extra caps??
  98. Looking for Tube Amp Kit Recommendations
  99. magnatone 280 schematic
  100. high voltage after cap. change
  101. My first tube amp
  102. Recommendations for 6888 triode operating point?
  103. Mullard 12AX7 part uniformity
  104. 6n15n-EB confusion
  105. Noob Question: Phono Preamp
  106. Transformer data required P782
  107. Snubbers on Power Transformer Secondaries
  108. CCS for 6V6 PP amp
  109. screen voltage for triode strapped pentode
  110. New Driver
  111. purpose and value importance of resistor
  112. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  113. Help with amp please.
  114. Another Discrete Current Source
  115. 834 Triode amp
  116. Determing the reason for mystery? cap in schematic.
  117. Dyna ST70 to Dual-differential EL34 triode amp project
  118. Tube Signal to Noise Ratio / Dynamic Range
  119. fluctating bias
  120. Just tried a Wire Wound pot for volume.
  121. LED's in the cathode..
  122. Dr. Arthur Loesch
  123. Counterpoint SA-220 mods
  124. Broskie P-P Bridged Output Stage
  125. Would a member fluent in technical German please have a look at this link?
  126. Damaged tube? EL84
  127. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  128. vk-2100 mod question please
  129. Heater supply
  130. 6111/6n16b - linestage noise problem
  131. OPT specs
  132. Re: Tube Line gain stage with pcc88 or ecc82
  133. Knight-kit KA-55
  134. Can I delay part of a B supply this way?
  135. Tube Preamp turn on circuit
  136. SE GM-70 for 700-800 euro?
  137. filter cap markings
  138. tube buffer noise cancellation
  139. PSUD 2
  140. Bypassing filter caps with Smaller caps
  141. balancing resister for series capacitor in a power supply
  142. Yaqin MC-100b- TJ Full Music 6sn7
  143. Forgive me for I have sinned. Help with Volume Pot!
  144. Help with diagnoses for leak 20 PLEASE
  145. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  146. Fred Nachbaur SET amp: input capacitor
  147. Heathkit scu 1 and knight kn924 needed schematics
  148. Journey to the centre of a tube..
  149. RIP Dr Jim Marshall
  150. some questions about an ECL82 SE amp
  151. Heathkit Sine/Square wave Generator Manual needed!
  152. SRPP Signal Output Capacitors
  153. simple se input impedance
  154. Kt120 screen current
  155. New or used output xformers to play around with?
  156. Magnavox amp
  157. Help hooking up panel ammeter for bias adjust
  158. opt A-440
  159. OTL Headphone amplifier with Tube ED8000
  160. NJ7P Gone?
  161. MYSTERY METAL TUBES B-1532
  162. noisy tubes
  163. Old amp hum repair
  164. Traveling with DIY Kit in USA-Airport Security Question
  165. Hammond 1650P vs 1650N For EL34 PP
  166. Calibrate a Hickok 6000?
  167. Blown Output Tubes
  168. Kriesler Radiogram refurbishment questions
  169. 6P15P socket connection
  170. Revision 2. Balanced
  171. 6V6 schematic
  172. 6h23N test setting?
  173. 12AH7GT
  174. TUBE Tape Head record / playback amp....
  175. Strange couple comportament 6L6GC RCA black plates.
  176. Reduce Output Volume
  177. Differential Amp CCS Tail SVCS Plate - Noise Issues
  178. Triode curves for EL/PL519
  179. Is that a SRPP circuit with 6SN7?
  180. KT33 Push Pull
  181. Rogers Cadet III Integrated Amp Capacitor Values help
  182. 2a3 alternative after NOS burning
  183. 6SN7 SRPP - oscillating dc offset
  184. Hickok TV-2 'percent quality'
  185. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  186. Aikido LV 48V ECC99 or 6N6p
  187. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  188. Back to the tubes
  189. Any use for these PAECO transformer?
  190. Video lectures on tube amplifier design
  191. Millett PP or Allen Wright's PP-2c or?
  192. Magnavox 8608-10
  193. Time relay
  194. Help with Music Angel XD800MKIII mods!?
  195. Little Dot MKIII ??????
  196. Cathode follower wideband amplifier
  197. Wrong base ???
  198. My first DIY schematic... need eagle eyes.!
  199. Stubborn Noise/Oscillation - Another Call for Help
  200. help with power tranny
  201. Tube Amp Repair - SE Michigan
  202. ST 70 Power on!
  203. given choice of low screen voltage or low bias which sounds better or is it equal
  204. How many various OEM brands come from Shuguang?
  205. Bye for now! :)
  206. general power tube output impedance chart?
  207. Should I ground my ST 70?
  208. What is the biggest 300B tube? (Dimension)
  209. 6N16 Valve break-in time
  210. Mystery Amp.
  211. valves tungsten filament
  212. Musical Machine (triode PP EL34) question(s)
  213. M100 Output Tube Problem!
  214. Need to replace the power switch on an EAR 859
  215. Eico pentode vs triode VA
  216. gold grid 5881 - was I had?
  217. DN2540 CCS questions
  218. Operating point for pp KT88
  219. Low THD of Opt Cathode feedback
  220. No bias in S-5 12K, 8L, 16L, etc?
  221. Wanted...broken Golden Tube Audio SE-40
  222. Precise 116 Data Needed
  223. Can you bi-wire using two different taps
  224. Transient Responce of Williamson Amp build
  225. Tantalum caps in the filament supply?
  226. Assistance needed in reconstructing a Golden Tube Audio SE-40
  227. interesting power tube comparison chart
  228. 833A and 3-500Z Circuits
  229. Pilot SA-260 amp and Fischer 400C advice
  230. Long tailed pair phase inverter issues
  231. advice on changing bridge rectifier
  232. 21st Century Maida Regulator
  233. 6CA7 UL Push Pull Amp Design
  234. Tube recommendations anyone?
  235. WE 2C51 Date codes
  236. T500-1 - any ideas?
  237. hybrid power amp and more questions
  238. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  239. 6CB5 AMP BUILD.
  240. ABB France SE OPT??
  241. heater wiring
  242. Audioromy FU29 improvement and upgrades?
  243. Need VFD display filament driver
  244. Power Transformer Limitations
  245. Yaqin 100b channel imbalance
  246. Grid stoppers in class AB2 push-pull arrangenets?
  247. Glass bead inside of KT88
  248. Find tube tester!
  249. mono block amps with 2 x 833C overkill ? even possible to DIY?
  250. happiness is a box of 6550 NOS tubes

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