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TH30 Clean channel picking up local radio.
Posted: Sun Oct 13, 2019 2:16 am
by Hammerheart
Clean channel picks up local radio. Dirty channel is fine.
First thoughts? Dodgy Valve? Any valve swaps I can try to pinpoint the issue?
Re: TH30 Clean channel picking up local radio.
Posted: Sun Oct 13, 2019 2:21 pm
by Mr Mustard
Pre-amp valve shield missing?
Re: TH30 Clean channel picking up local radio.
Posted: Sun Oct 13, 2019 4:03 pm
by bclaire
Also, try a different cable. My first thought is though, bad preamp tube.
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 1:33 am
by Hammerheart
Ive tried cables/guitars/different power points. It does seem to be worse on one side of the house. im gonna try reseating the tubes tomorrow to see if its anything like a loose connection. I read on another forum this may be worth a try.
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 1:35 am
by Hammerheart
oh. it does it on both channels. its just way more prominent on the clean. I just noticed it sooner on the clean.
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 3:48 pm
by northernguitarguy
Just curious....was it ever working? Did anything change, i.e. amp location, etc.?
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 6:53 pm
by Hammerheart
It was moved from UK to Canada. Voltage has been switched. Might just be my location. :/ obviously its just bugging me now as it didn't do it back in the uk.
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 7:54 pm
by Les Paul Lover
Could you try another valve amp in the same location?
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 9:01 pm
by Hammerheart
Les Paul Lover wrote: ↑Tue Oct 15, 2019 7:54 pm
Could you try another valve amp in the same location?
all my other amps are ok (one is a rocker 15 combo)
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 10:06 pm
by Les Paul Lover
Hammerheart wrote: ↑Tue Oct 15, 2019 6:53 pm
It was moved from UK to Canada. Voltage has been switched. Might just be my location. :/ obviously its just bugging me now as it didn't do it back in the uk.
Are sure the transformer rewiring has been done properly?
If all your other amps work correctly, and that one has been modified (I know, it a simple mod in theory), I would look there to start with - well, after trying a new ECC83 in each slot.
All the preamp valves have their shields, right?
Re: TH30 Clean channel picking up local radio.
Posted: Tue Oct 15, 2019 10:15 pm
by Hammerheart
Les Paul Lover wrote: ↑Tue Oct 15, 2019 10:06 pm
Hammerheart wrote: ↑Tue Oct 15, 2019 6:53 pm
It was moved from UK to Canada. Voltage has been switched. Might just be my location. :/ obviously its just bugging me now as it didn't do it back in the uk.
1-
Are sure the transformer rewiring has been done properly?
If all your other amps work correctly, and that one has been modified (I know, it a simple mod in theory), I would look there to start with -
2-
well, after trying a new ECC83 in each slot.
3-
All the preamp valves have their shields, right?
1 - I did it. It operates fine apart from the radio issue so I THINK I did it correctly
2 - Next step maybe.
3 - yes
4 - a visit to the local tech in order.