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Title: gretsch nashville 7154
Post by: shovelheadsixsix on October 18, 2009, 06:09:15 PM

I have a 1968 gretsch nashville soild state amp .When I use the built in echo or the tremolo effect the amp will thump continuously without strumming a note.What is wrong.

Title: Re: gretsch nashville 7154
Post by: J M Fahey on October 18, 2009, 07:32:54 PM

Grounding problem. Usually "mechanical" meaning rusty/worn/corroded contacts (do your PCBs use some kind of connectors, or crimped connections?) or maybe some loose nut in the grounding screw.
I think you get what I am pointing at.
Might also be old/dry filter capacitors. Statistically, these are the most likely culprits.
Third in the list might be old/rusty/dirty pots , jacks, etc.

Title: Re: gretsch nashville 7154
Post by: shovelheadsixsix on October 18, 2009, 07:55:51 PM

Thanks. A ground problem was my first guess.I just got amp it still has a 2 prong plug a ground plug is going to be one of my first fixes.Hard to find any info on this amp.any one have schematics?

Title: Re: gretsch nashville 7154
Post by: shovelheadsixsix on October 23, 2009, 02:32:26 PM

repalaced caps today and still have the hum.now I will try and figure out the ground problem.

Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Amplifier Discussion => Topic started by: shovelheadsixsix on October 18, 2009, 06:09:15 PM