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Topics - Slam

#1
I have been picking up these unwanted organs for the speakers and now i have a shelf full of different amps and i figure this could be a great learning tool. I'm thinking that it could be a mono block amp for home audio or a simple guitar amp. I am pretty sure that the RF jack is an input. I'm not sure how to treat the 4 wires going to the connector. The gray wire runs off the CB and is marked amp out. The black wire is a ground. and the red and blue wires run to different large resistors. How would i hook up a simple tone and volume? I could use some general knowledge of what i have here.  
 Now i know this probably won't be a preferred design. But i'm hoping it will help me to start understanding the basics.
Anyone willing to help me put these to good use? These organs are real easy to find for free if you have the man power to move them.

Mike
#2
  Hello, a friend of mine brought me an acoustic amp that had a blown fuse. I replaced the fuse with the amp open and noticed the resistor (.5ohm 5watts) across one of the transistors was glowing bright red. I shut her down and replaced the 2n3055 with a mj15022 (higher rating) and replaced the .5ohm with a .33 ohm. when i fired it up the two transistors on the side i replaced got alot hotter than the other two but nothing fried or glowed in the short time i had it on. There was no output from the amp at all (Had speaker and guitar hooked up). I have repaired several tube amps but am at a loss with SS. Might be easier with a schematic but i couldn't find one online without having to buy it.
  I really would appreciate some input, this is a favor for a buddy. 
#3
The Newcomer's Forum / HELP! SB 200 sunn bass amp
September 06, 2009, 05:17:36 PM
Hello all, I really need some expert knowledge to keep me from destroying this thing. I bought new filter caps and started to replace them by pulling one of the old ones without marking the polarity :duh I just assumed the board would be marked and it wasn't, I know i know. I tried to find a schematic but nothing anywhere because not many where made before Fender bought Sunn and they're pretty rare i guess.
   Can any one tell me for sure if the two filter caps should be in parallel or series??? I was sure it was series but it just pops fuses. Also there is a large ceramic cap (.02uf 1400vdc) located near the transformer that was disconnected by owner and i'm not sure where it fits in.
   This amp was originally a combo that was reboxed as a separate head by the current owner and couldn't get it to work. When i got it it just hummed what appeared to be a straight dc signal to the speaker. I am not really a tech but have fixed simple stuff in the past so i am trying to help a buddy out.
   If anybody can help it would be most appreciated and i would really like to learn more of the technical side of amp repair.

Thanks,
Mike.