14-09-2021, 05:20 PM
Good and bad news, and yes perhaps I have been a wee bit lazy but its understandable given my heath issues at present.
I thought I would restart from scratch. I used my signal generator with a nbc connector to 1/4 jack into the amp input to see if any sound at all could be heard through the system? I connected the speaker with some leads with crocodile clips. I put a 500Hz signal through the amp and low and behold a great signal from the speaker could be heard. I tested all of the controls (treble, middle and bass) and in each case they are all working (you could hear the difference in tone in each case)........except, the reverb does not appear to be doing anything at all?? Furthermore, when I switched the amp off (volume and gain controls at zero) yet another loud pop through the speaker (I seem to have this initially with all the amps I've worked on).
I disconnected the signal generator and two things I did, rightly or wrongly - switched on a off a few time to see if it popped again and not this time, very tiny sound but not very loud at all. The second thing was I turned the volume and gain full up with nothing connected (just to listen for any crackles from the circuit) and a motor boating sound could be heard immediately which lasted for a few second before 'pop' the internal fuse blew. So, yes its working to some extent BUT does appear to have a fault somewhere - is this related to the reverb circuit/springs etc???
Best Regards
I thought I would restart from scratch. I used my signal generator with a nbc connector to 1/4 jack into the amp input to see if any sound at all could be heard through the system? I connected the speaker with some leads with crocodile clips. I put a 500Hz signal through the amp and low and behold a great signal from the speaker could be heard. I tested all of the controls (treble, middle and bass) and in each case they are all working (you could hear the difference in tone in each case)........except, the reverb does not appear to be doing anything at all?? Furthermore, when I switched the amp off (volume and gain controls at zero) yet another loud pop through the speaker (I seem to have this initially with all the amps I've worked on).
I disconnected the signal generator and two things I did, rightly or wrongly - switched on a off a few time to see if it popped again and not this time, very tiny sound but not very loud at all. The second thing was I turned the volume and gain full up with nothing connected (just to listen for any crackles from the circuit) and a motor boating sound could be heard immediately which lasted for a few second before 'pop' the internal fuse blew. So, yes its working to some extent BUT does appear to have a fault somewhere - is this related to the reverb circuit/springs etc???
Best Regards
if all else fails...read the instructions!
