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View Full Version : Amp Technical Info

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  1. Laney LC15R and 1x12 cabinet:- bypass internal speaker defeat?
  2. Switch for cabinet impedance selection
  3. PSU question for amp designers
  4. Why do our amps buzz when the neighboring suite has their lights on?
  5. 65 Super Reverb Head Cabinet?
  6. Can you educate me on biasing?
  7. Transformer Schematic for Bad Cat Hot Cat 15
  8. Undesirable noise from tube amp
  9. Fender Bandmaster Blackface - what circuit?
  10. Adding an FX loop to Allen Old Flame?
  11. amp tech in NH or MA?
  12. Amp tremelo ?
  13. Stand-by not really standing by
  14. Best New Production 6550 or ?
  15. Vaunted Blue Mallory Caps....
  16. swapping a 5V4 for a 5AR4
  17. 25 or 50 watt 12F150 in my SFDR?
  18. TSL 60 Volume question
  19. Mojave Line out?
  20. Standby - tube saver at shut down??
  21. cleaning diaphragm on 1969 g12h30
  22. Help diagnose hum problem
  23. Any good places to buy parts in Toronto or...
  24. EVH 5150 III change to EL34's?
  25. Allen Transformer in '64 Princeton reverb.
  26. Fender HotRod Deluxe channel switching
  27. Engaging the vibrato in a BF Fender
  28. My first time biasing new tubes...
  29. Why did I wait?
  30. Anyone of you Tube gurus own a Dyna Jet 606 tester?
  31. Brimar 6V6GT's or Sylvania 6V6GTY's ?
  32. Replacement Baffle Source?
  33. opening a traynor head
  34. So, what's the most effective way to reduce the gain in the MV section of my amp?
  35. Is a hole in my speaker really bad?
  36. What Does JAN mean regarding NOS Tubes?
  37. Is this a Dumb Question?
  38. Vox Ac15 1959/1960 schematic differences?
  39. Is there something wrong with my Biasrite?
  40. Help me with my tone stack.
  41. Technically, Why Does MV Get a Bad Rap?
  42. Amp tech ?
  43. Cutting an old Chassis?
  44. Why Light Bulbs inside the chassis of my Clubman?
  45. Vibrolux voltage measurements
  46. What does an alnico magent look like?
  47. Univalve Issues
  48. Best books on Vacuum tubes?
  49. NOS Sprague 'black beauties' - Would they still be good?
  50. Fender Champ - Extension Cab suggestions?
  51. Strange glowing plate problem - help.
  52. Spray cleaner : Which for tube sockets, which for potentiometers ?
  53. tubes for 18 watters etc
  54. 6V6s vs. el84s
  55. Reducing Volume
  56. 7199 to 12ax7 swap; is this possible?
  57. Rewire Marshall 2x12 to go with a BF Bassman?
  58. 64' Princeton Question
  59. Vox AC30 dilema
  60. All Octal Preamp? (building an amp.)
  61. Dr. Z Maz Sr. Blowing Fuses!! Help!
  62. Cleaning up an echoplex...
  63. Unwanted volume decrease
  64. Fender Twin Question
  65. mesa lonestar 1/2 power switching problem
  66. 1973 Bassman 50-Potential mods?
  67. Why Few PPIMV in Production amps?
  68. Do power tubes affect tone?
  69. Super reverb baffle question
  70. '76 SFPR Way too much Bass
  71. princeton reverb mods?
  72. Celestion Blue vs. Weber Blue Dog.....
  73. need Vibrolux AA864 schematic
  74. Scratchy Sounding Jubilee.....Help Please!
  75. CRATE V33H vs. Peavey Classic 30
  76. What exactly is this piece? (ground buss?)
  77. Wiha Tools for Amp Techs
  78. What can I expect from changing the baffle?
  79. Bridged two Metal Can Cap prongs...what did I break?
  80. Tuberolling in a Vibro Champ
  81. Can someone recommend a good Soldering Gun?
  82. Reccomend me some tubes (64 Vibroverb)
  83. Converting a Peavey Hybrid Amp to an all tube amp?
  84. What to do with a single Sylvania 6L6GC
  85. Help selecting tubes for my Twin
  86. Marshall rivet extraction and replacement...
  87. Possible Transformer news for you Amp Techs
  88. Can/should I fix...
  89. Finding a Bad Tube?
  90. Fender Twin Tubes Question
  91. Tube Getters burned up
  92. A few tube noise/general tech questions...
  93. What is the tube order in an Ampeg Gemini VI?
  94. Blues Deville, volume pot alternative?
  95. What's a good EL34 for mids?
  96. what wattage speakers for 2x10 60 watt amp?
  97. Squealing Power Tube
  98. Speaker Effiency Question
  99. Help with a Marshall Lead & Bass 50
  100. Help with a Mesa Boogie Mark III
  101. Solid State amp without load - safe?
  102. 6V6 in my Champ has gone cold. Why?
  103. old filter caps and plate voltage
  104. how important is it to use real expensive birch in cabinet making
  105. Put in some Tung Sol tubes and Biased my DRRI and . . .
  106. Help IDing these red coated (ERIE) resistors?
  107. testing old preamp tubes
  108. Reduce/Eliminate Power-on Pop on SS Amps?
  109. Why is this cap in JTM45s but not 5F6As?
  110. My latest creation
  111. Crappy Fender Amp Schematics???
  112. Qustion about amp chokes.
  113. How do I know if I have the AA864 circuit?
  114. Question about amp smoking
  115. Reverb tank in Mesa F50
  116. Mesa 6L6GC,"STR 415" good? junk?
  117. Are power amps the same as heads, in that you have to match ohms?
  118. Static noise on my Hiwatt DR504... please help!
  119. Prefered Solder
  120. Draining Filter Caps Question
  121. 7591 Questions?
  122. Biasong My Super Sonic
  123. Power Supply question, B+ and -?
  124. Speaker wattage
  125. Fuchs Lucky 7 Hiss....
  126. Swap 12AX7 for EF-86?
  127. Souping up a Marshall 2061x 20W amp ?
  128. what effect do LTP PI plate load resistor values have on sound?
  129. Point-to-point Wiring
  130. Ghost notes?
  131. Best solder iron?
  132. Anatomy of a Tube Question
  133. How to bias a 1958 Fender Super
  134. Standby before or after filter?
  135. Help with 12AX7 ID
  136. Mixing a 8 ohm & a 16 ohm cabinet , what setting?
  137. 3-position ground switch, still required?
  138. Mr. John Phillips
  139. Recommend a good NOS 12AY7 that won't break the bank...
  140. Tube ID
  141. Unused half of a 12ax7, what to do?
  142. Mesa Boogie Mojo Missing
  143. Ceriatone kit build thread
  144. Power supply question
  145. power tubes from the 50s & 60s
  146. '94 Fender 4x10 Super Amp Bias Adjust??
  147. Dr. Z MAz Jr. Problem
  148. Rust removal from Power Tranny
  149. anyone know where i can get a piece of scrap basketweave
  150. Speaker size and treble
  151. how would this be, weber 10A150 in princton
  152. Do amps draw power shut off?
  153. Any Difference Between 6V6G and a 6V6GT? Also, Tube Rectifier Question
  154. Gibson GA-15 RVT Phase inverter?
  155. Parallel on V1?
  156. Problem with Marshall Valvestate
  157. Weird overtones coming from Superlead
  158. How much do power supply caps matter?
  159. Modding an amp for more gain.
  160. To replace transformer(s) in a Bassman or not.
  161. More versatility out of a Marshall JCM 900 SL-X
  162. Do all amps use Slow-Blow fuses?
  163. Solder Station Temp
  164. Princeton Reverb mod
  165. Adding an extension cab to a combo?
  166. Current (no pun) Manufacture KT66's
  167. Will a JCM800 2204 chassis fit a 2210 head box?
  168. Dead Matchless
  169. GT Solid State Rectifier Plug
  170. BF Princeton Hum
  171. noise when guitar is unplugged
  172. TOOOOB Questions!
  173. Noise from the tremolo of a vox ac30ccx
  174. Westinghouse 5881s bias question?
  175. Looking for Gold hardware
  176. Voltage reading trouble?
  177. Mesa question.
  178. 6L6 choices are making my head spin . . .
  179. Which TrainWreck Kit to Buy/Build?
  180. Tube flash
  181. Ampeg SVT-III schematic?
  182. Reverb pan cardboard backing question...
  183. Heater center tap
  184. Do volume pots adjust current linearly?
  185. AC30CC2 Master volume
  186. What do you notice when the caps are bad?
  187. Concern: Rust on vintage Fender amp base
  188. Salvaging a PT...what to look for?
  189. BF DR external speaker out: what can you plug in there?
  190. Is this possible?
  191. Cap Terminology (stupid question)
  192. Tinkle, tinkle...
  193. Overheating transistors
  194. Room/Ambient Temperature
  195. Rusty transformers- anything to worry about?
  196. Help! I just destroyed my Pro Junior!
  197. speaker wattage question
  198. question about self biased guitar amp
  199. Tube help
  200. Amp Noise du Jour...
  201. JCM900 MKIII output transformer???
  202. Marshall logo dont fit?
  203. Fender reverb pan info needed
  204. Rivera Chubster 6L6?
  205. PA speaker question
  206. Chassis options and sources
  207. Swapping rectifiers in a cathode-biased amp.
  208. Full range cabinet w/guitar amp...
  209. 5881 fell into the cabinet of my 63 concert..pin missing. help!
  210. Matchless C-30 Harmonics
  211. winged c's in a mesa express 5:50?
  212. know where to get a hickok 6000a serviced?
  213. KT-88 specs
  214. Power tube spark, blown fuse
  215. Who Makes The Best New Production 6V6GT and 5AR4?
  216. Budda SD18 blowing fuse? Help!
  217. 6v6 Id
  218. Differences in 6L6's?
  219. Tube amp sounds like "frying eggs" ???
  220. Capacitor Types
  221. 62 Bassman Tubes
  222. Biasing a Vox AC50
  223. Got an old Hammond F-100; guitar amp?
  224. Another bias question-power output
  225. Using a device in USA that wants European power
  226. Ceriatone Hiwatt?
  227. Is an added FX loop sucking tone when not used?
  228. Marshall Master Lead Combo
  229. Please Help! Tube Rattle
  230. Fender Princeton Reverb?
  231. pre-amp tube wearing
  232. 12" Peavey Black Widow recone?
  233. Impedence matching box?
  234. Bias Pot/Resistor Value
  235. Old stock EL84 ID
  236. Started modding my DRRI...
  237. Jcm 900
  238. Need help finding great tubes? EF86/ 6267
  239. stokes mod, princeton reverb
  240. More Headroom, Are 12AX7c's going to do it?
  241. Pleaseeee Helpppp!!!!!
  242. OK FEllow Amp Gurus.... Question
  243. Palomino V32 bias question
  244. Power Filter Caps and Polarity direction w/fender
  245. Tips on ID`ing a real BF faceplate?
  246. What causes...
  247. Another Super Sonic Problem
  248. Power transformer mounting question *help*
  249. Low Power Tweed Twin rectifier tubes help!
  250. Describe the difference between a 6v6 and a 6L6