| Challenger Reverb Problem [message #27115] |
Sat, 01 December 2018 17:16  |
ARKustom
Messages: 37
Registered: January 2014
Location: United States
|
Member |
|
|
|
I just got one of these and can't get the reverb to work. When I bought it the reverb only made a loud hum when the knob was turned up, so I got the guy to come off the price. When I opened it up to clean and inspect connections, one of the reverb springs was loose. The ferrite beads were loose in the reverb pan, so I bought a replacement pan. I got it today and connected it, still no reverb. It will crash, so the output works, The background hum increases when the reverb knob is turned up (not like the loud hum before), but there is still no reverb effect. Any ideas? It seems like none of the signal is getting diverted through the reverb tank.
|
|
|
|
|
|
|
|
| Re: Challenger Reverb Problem [message #27120 is a reply to message #27115] |
Sun, 02 December 2018 22:25  |
chicagobill
Messages: 2006
Registered: April 2003
|
Senior Member |
|
|
Seems like the chip is bad.
You also need to be certain that the input jack of the replacement tank has its ground connection isolated from the metal case, as the input coil is part of the feedback loop of the op amp.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Re: Challenger Reverb Problem [message #27205 is a reply to message #27115] |
Sat, 23 February 2019 21:31 |
chicagobill
Messages: 2006
Registered: April 2003
|
Senior Member |
|
|
|
I'm not sure that I understand what you got instead of the standard 8 pin DIP style case. The correct type would be an LM1448-N, or whatever 5558, TL072, etc. N should be a standard 8 pin DIP.
|
|
|
|
|
|
|
|
VintageKustom.com
Search
Help
Members
Register
Login
Home
]