AC10 C1 odd buzz / harmonic

For anything to do with guitars, amps and effects units

Moderators: dave robinson, David Martin, Iain Purdon, George Geddes

AC10 C1 odd buzz / harmonic

Postby SJB » Sat Jan 20, 2018 1:48 pm

My AC10 is producing either a distortion buzz or odd harmonic when playing the 1st and 2nd strings from the 11 fret upwards - when both strings are picked.
If one is sounding and the other picked the noise is present.
Individually the notes are clean.
Its been like this from New - though it was an issue with the G3 - but now I have a new guitar its the same with both guitars plugged directly into the amp.

Yesterday I replaced the EL84's - one failed with horrific microphony. For some time I was thinking that I would change the valves and this issue would resolve.
I have not changed the ECC83's

So if anyone else has an AC10 C1 - could you check if picking the 1st and 2nd strings 11th fret upwards - one after the other or together - you have this effect.

Thanks

SJB
SJB
South Coast Shadows, Surrey Shadows,
South Wales Shadows,
SJB
 
Posts: 86
Joined: Tue Jan 06, 2015 12:50 pm
Location: South Wales
Full Real Name: Stuart J Best

Re: AC10 C1 odd buzz / harmonic

Postby JimN » Sat Jan 20, 2018 3:35 pm

Have you tried that guitar on a different amplifier?

It sounds to me like an issue with frets or the strings. I hope it's just the strings.
User avatar
JimN
 
Posts: 3931
Joined: Thu Sep 17, 2009 11:39 pm
Full Real Name: Jim Nugent

Re: AC10 C1 odd buzz / harmonic

Postby SJB » Sun Jan 21, 2018 6:11 pm

Thanks for the post Jim.
I have now tried my Ibanez guitar - same issue on all pickups. So we have the same issue on three guitars - so its the amp.

I made a dummy load - used headphones - and all is clear as a bell.

So it's down to microphony (did I spell that correctly) or the speaker. Or something loose.
I will check now with another AC10 (new one) which should be available for me to try on Thursday.

It's not an issue when playing live - but it is an issue recording.
SJB
South Coast Shadows, Surrey Shadows,
South Wales Shadows,
SJB
 
Posts: 86
Joined: Tue Jan 06, 2015 12:50 pm
Location: South Wales
Full Real Name: Stuart J Best

Re: AC10 C1 odd buzz / harmonic

Postby Hunt1967 » Tue Aug 28, 2018 8:27 am

Did you find the problem, I’ve just got the AC10 and have a RAT dummy load box
Was it the dummy load that caused the problem I don’t want to use it if it can cause the amp problems
Mick
Hunt1967
 
Posts: 8
Joined: Fri Jan 30, 2015 6:08 pm
Full Real Name: Michael Leslie Hunt

Re: AC10 C1 odd buzz / harmonic

Postby SJB » Tue Aug 28, 2018 1:00 pm

Mick,

Using a dummy load - providing its the correct impedance won't do any damage. I don't think the odd buzz / harmonic is present with direct recording /dummy load.

With respect to the odd buzz / harmonic I noted when someone purchased a new AC10 - it has the same issue.
This time the guitar was a Telecaster.
My amp has been used at high volume - keeping pace with AC15's and loud drummer.

The issue arises even on very low volume. This is a class A amplifier so low volume should be OK.

I have recently moved and the house is in the process of being adjusted as it were. So I can't fully check the situation now.

The house move from Southampton to Wales - has taken my time - so I have not looked at this for some time.
I will get to the bottom of this at some time - but when playing loud at the clubs - it's not an issue.

Will follow up as soon as I can.

By the way I have taken JimN comment on board - I have dampened the tremolo springs by putting foam inside them.
I am using Fender Bullets 9's. I have to be careful as I have had Carpal Tunnel ops on both hands.

Stu
SJB
South Coast Shadows, Surrey Shadows,
South Wales Shadows,
SJB
 
Posts: 86
Joined: Tue Jan 06, 2015 12:50 pm
Location: South Wales
Full Real Name: Stuart J Best


Return to Guitars, Amps & Effects

Who is online

Users browsing this forum: No registered users and 13 guests

Ads by Google
These advertisements are selected and placed by Google to assist with the cost of site maintenance.
ShadowMusic is not responsible for the content of external advertisements.