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  1. trying not to exceed 6X4 ratings
  2. All 6sn7 preamp for 6v6? First schematic design!
  3. 6AQ5 vs. 6BQ5/EL84
  4. "Champ" power tube options and load requirements
  5. Fender style neg bias adjust vs balance
  6. Preamp selection woes...
  7. Direct input to a cathode follower
  8. choke question
  9. Driving 6L6s into clipping
  10. hole sizes for chassis plans
  11. amount of gain in AC30
  12. Output transformer interleaving?
  13. Preamp Recommendations??
  14. AC filament supply?
  15. What characteristics do you get from parallel tridoes?
  16. PSU question
  17. tube amp attenuators
  18. Output tube configs...
  19. Switching Problem...
  20. Vox and Matchless are having my baby..
  21. Another recomend me an PT
  22. Direct/preamp out schematic?
  23. Critique my schematic, please
  24. 6146A/B cathode bias not recommended?
  25. Biasing SE class A, fixed bias
  26. 6L6PP Cathode Bias
  27. Can I use a 12AU7 based preamp with my SS power amp?
  28. Single tube reverb revisited- long boring post
  29. Recommend me a PT please
  30. OT location?
  31. Small amps, output transformer hum
  32. simulate ultralinear transformer with resistors?
  33. 6BM8 tubes... what to use them for!
  34. Multi-Stage Preamp
  35. Quick jfet question...
  36. What is a cathode follower?
  37. Plate resistors on preamps
  38. spacing between eyelets on a board
  39. 100uF/500V vs 2x220uF/350V
  40. What would cause this?
  41. First attempt at design, suggestions please.
  42. Can you suggest a source for new transformer laminations?
  43. Please comment this amp design...
  44. Adding 5V Supply
  45. THD Yellowjacket theory?
  46. Lead dress tips?
  47. Diode||Resistor in signal path
  48. Dropping heater voltage
  49. running Marshalls cathode biased
  50. Building a push-pull - what's different?
  51. how to start learning amp repair have some nolage
  52. PT current question
  53. Output transformer tech questions
  54. series heaters for 12ax7 preamp 24vac
  55. Beginner amp building questions
  56. 5E3X2 no screen resistors
  57. 1n4007 spike protection
  58. MOVs
  59. komboking alternative?
  60. new project
  61. Multiple Coupling Caps+Dropping R's?
  62. Power supply question
  63. will this work?
  64. recommend marshall 50 watt OT and PT
  65. Marshall V2a and b
  66. EZ81- how much can they really take?
  67. the importance matching impedance with tube amps
  68. Thinking about building a transformer test rig
  69. 35D5 pentode any used in guitar amps?
  70. Adding a cathode follower
  71. Narrow Panel Deluxe question
  72. Repairing a Bl@nkenshib
  73. Input Stage Advice?
  74. 5G9 PT, OT and Choke layout
  75. Circuit & Layout Review for PP amp
  76. How much gain in each ampstage for maximum tone ?
  77. MARK IV EQ Scaling
  78. Adding FX loop to 5G9 - locating sockets
  79. Is this possible?
  80. M*tchless RV-1 Rosetta Stone?
  81. EF86 amp block diagram
  82. adjusting bias in 5G9
  83. Brownface tone control question
  84. Gain of Long Tail PI?
  85. Music Man output section?
  86. Wiring a push pull potentiometer for channel defeat
  87. Treble distortion
  88. What makes a Fender a Fender???
  89. Using A Pot To Control Feedback Loop
  90. 2n3904 bias resistor
  91. 60s Marshall Presence Circuits
  92. Trying to understand 2nd gain stage
  93. low end and how to reduce it?
  94. using 2 different impaedance taps simultaneously
  95. Problems with gain in my circuit
  96. How does the tonestack circuit work??
  97. Reverb using two triodes
  98. Phase inverter fine tuning help. AX7 or AT7?
  99. LC filter design help
  100. 2203 with extra gain stage - still have a spare triode, what to do?
  101. coupling cap & voltage divider question...
  102. any R/C filter charts?
  103. Beginner-- suggestions for PC programs
  104. Beginners tips and advice on new design..
  105. Round 13--better cabinet emulated direct sounds
  106. Rectifier switch from tube to diode
  107. preamp schematic help
  108. Need to change 22K resistor to 27K when changing from 5U4 to GZ34?
  109. Yikes! 5150-3
  110. Fixed Bias for a Single Ended Design?
  111. Using the second input of the LTP?
  112. How many dB are needed?
  113. transformer for multi-class operation
  114. new preamp for 200w amp- tone stack question
  115. How many watt VR being attenuater in 5w tube amp
  116. need a schematic for a attenuator
  117. caps across plate resistors - questions...
  118. why multiple stages?
  119. Problems with extra gain stage in 2203
  120. Plexi and Mesa high-gain sounds from one amp?
  121. Channel switching relays.
  122. How to prolong the life of tube
  123. Bass amps w/ preamp tube
  124. PT values for 5E3, 5E9A and 5F11
  125. value of resistors in voltage divider?
  126. replacing a pot with fixed resistors (help)...
  127. Simulating a 10 meg pot with a rotary switch
  128. induced hum on cathode wire?
  129. biasing preamp tubes?
  130. 2 el84s and 2 6v6s PP, same output tranny ?
  131. Coupling caps
  132. Master volume - switchable
  133. EM 800 "Magic Eye" tubes
  134. Fender brown preamps
  135. Hammond 125C for SE use?
  136. Safe power range for EL34.
  137. ORANGE MKII schematic
  138. Line-out vs Pre-out
  139. Good prototyping board?
  140. Signal Leaking
  141. PPP primary impedance load Q
  142. How do you calculate the power output of your SE amp?
  143. Bright switch
  144. Bias is bias, or is it ?
  145. New Electrolytic Capacitor Forming?
  146. Fixed AND cathode bias?
  147. what about calss D
  148. Why do they use this?
  149. Svt midrange inductor, diy?
  150. switch rating cathode/fixed bias
  151. new design PT/OT
  152. Inside an Output Transformer
  153. Footswitch build For Vibroverb
  154. Beam Blocker Design
  155. tone differences with different primary Z ???
  156. Plate load Z
  157. Power tube Ap=Wattage?
  158. New Build - Class A 6L6
  159. Help choosing a custom Fender cab (photos) NEED OPINIONS
  160. Transformer Choices, Mojo, Allen, Mercury
  161. Apologies if this was already covered...
  162. Illinois Capacitors?
  163. This may be some Jello for thought.
  164. speaker phase
  165. Class A SE vs Class A PP?
  166. Weber Transformers
  167. Switching Plate Load
  168. interesting low-power beam power tube- 5686
  169. Randall Valve-Dynamic G3 series schematics?
  170. L-Pad and fixed R bypassing rheostat question
  171. Explanation of this circuit
  172. suitable for Preamp Power Supply here>?
  173. Mic Splitter?
  174. Need advice for simplified blackface style 6V6 amps
  175. determining PT plate currents for used TF's
  176. using 230v mains voltage directly for high voltage
  177. Which Reverb Tank?
  178. PI output swing voltage ?
  179. Clipping diodes?
  180. Chassis Layout for new project
  181. IRF710 as Ampeg style verb driver?
  182. Newb OT question
  183. passive leslie
  184. Voltage trippling.
  185. Fender Silverface Eyelet or PC Boards?
  186. 50w vs 100w distortion
  187. Strange new vibrato circuit in DR Reissue
  188. component trouble again
  189. Capacitors
  190. Choosing OT from OT's
  191. Standby for Valve Jr. ?
  192. Separate Cathode Bypass Resistor/Cap per 6V6
  193. Cobble PT = 265-0-265 What to do with that?
  194. Standby Switch on Bassman
  195. Tube powered Wah Pedal help
  196. Difference in tone between class A and AB ?
  197. screen resistor in 5F2A
  198. Help check my schematic design
  199. need a smallish tube for high plate voltages, fixed bias
  200. Cap bypassed cathode bias vs fixed bias?
  201. The Mighty Terror!! (50W OTT inspired amp)
  202. Preamp too loud
  203. Max UF for 5Y3 Rectifier
  204. active tonestack
  205. 5F2A and 5F2 fuse ratings
  206. Canīt find the right tube for my poweramp
  207. Introduction/Question: Multipurpose OT/PT for amp prototyping?
  208. ohms and watts
  209. remote-cutoff compression
  210. Output transformer for both SE and PP
  211. Peavey Bravo PA plate supply voltage
  212. Preamp 101 Fender Champ
  213. on-line calculators when modifying or building reactive loads
  214. Sorry for this post but....
  215. Dual bias supply
  216. Need layout & schem for new DIY amp
  217. Changing midrange freq on 5F6A
  218. Amp EQ 101?
  219. my amp at the stone poney
  220. schematic drawing software
  221. What steel to use when making Transformers
  222. Secondary's C.T. tied to Totem Pole Caps???
  223. modded BF Deluxe reverb
  224. 5U4GB rectifiers?
  225. Running two transformers in parallel?
  226. Removing Rivets?
  227. tone control options
  228. ground side for mallory 150's
  229. which type of capacitor is this?
  230. Need Bedrock Royale Reverb build help!!
  231. voltage doubler question
  232. Preamp cathodes options..
  233. el84 chathode bias shift-longish
  234. Grounding
  235. ? on the effect of Bright cap on second channel
  236. deep boost cap values
  237. Speaker for 50's blues
  238. Heater circuits
  239. ID these tubes
  240. axial and radial electrolytics
  241. Need some help designing my amp
  242. what those 330uF caps next to switch channel transistors for?
  243. Any schematic ideas for EF39, 6v6GT, ECH35, EBC33, EL33
  244. Local NFB
  245. Help me find the dropping resistor in Silvertone 1484
  246. Active tone controls?, how much positive feedback?
  247. Voltage on Preamp Tubes?
  248. Tube layout question
  249. Logarithmic potentiometer tapers: type A vs type B
  250. two simple questions