pray tell me more ?brand sort / mechanical /electronic actuator etc
Who's the guitar amp guru ?
Needing info about reverb unit.
Look Here -> |
pray tell me more ?brand sort / mechanical /electronic actuator etc
loopyloo (26-08-18)
Spring reverb tank in a Roland JC 120.
Reverb not working with guitar.
The tank is 3 springs Z shape. input coil is 2ohms, output coil 220ohms (measured out of circuit).
Does that sound right ?
With the tank outside the box I can tap on the springs with a stick and hear a "springy" sound through the speakers but it's pretty faint.
If I bang on the amp cabinet it should sound like an aeroplane has crashed through the roof, but banging makes no sound at all. (Just sounds like someone banging on the cabinet)
Last edited by loopyloo; 26-08-18 at 12:02 AM.
the cable going into the tank has lost the return wire ??? first guess comon fault
Last edited by hinekadon; 26-08-18 at 09:38 AM. Reason: more
loopyloo (26-08-18)
Got it !
You were close. Wire internal break between the output coil and its socket.
Skepticist (05-09-18)
great all done then ? happy cheers
loopyloo (26-08-18)
Yep happy all right. This amp sounds absolutely amazing esp now the reverb is working.
I was getting some really strange readings off that coil that I just couldn't figure, so I cut that one wire in half and the reading stabilized.
Just soldered it directly to the terminal then. Now all good.
Cheers
Last edited by loopyloo; 26-08-18 at 04:41 PM.
the resistance of the coils is not that important as its the ac going thru them that causes the reverb have fun don
loopyloo (26-08-18)
Bookmarks