Question for drhulsey help needed.
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Fadedsunburst59
- Posts: 14
- Joined: Tue Jun 23, 2009 3:17 am
- Location: Ringgold,Ga
Re: Question for drhulsey help needed.
I believe it might be the amp's ground loop because I have all new Monster cables guitar cable,from head to attenuater to cab, and I have used these same cables on my Orange without any noise, Then my guitar is good it has been rewired about a month ago with new CTS pots, gound loom, caps etc. and I have not had any problems with it in my other amp's. I have no experience with the inside of a tube amp but I used to work for a company and all I did was stuff and solder components to PC boards so my soldering is good (no cold joints), With a little help and pic's I know I can figure this out. Again thank you for your help.
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Fadedsunburst59
- Posts: 14
- Joined: Tue Jun 23, 2009 3:17 am
- Location: Ringgold,Ga
Re: Question for drhulsey help needed.
I dont want to be a bother, But please can someone help me, This radio station thing is really bugging the crap out of me. All else has been fixed, The only thing left is the stupid radio station. Thanks guys for all of your help.
Re: Question for drhulsey help needed.
Take a look at the layout here.
https://www.citimortgage.com/Servicing/ ... 19129294|1
The shielded cable goes from the input jack to the 15K resistor which is soldered to pin 7 of V1.
15K is a bit low for a gridstopper, so you may want to try a 33K resistor there.
That resistor acts as a RF (radio frequency) filter on the input.
It really doesn't effect the tone unless you go really high in value.
Common values for that grid stopper is 22K, 33K, 66K.
Make sure the wire from the input jack to the socket is shielded and that it is soldered well at both ends.
The braided shield should be grounded at only one end, which in this case is at the jack.
The end that goes to the tube should have the shielding trimmed back then some heat shrink tubing is put on it to prevent the shielding from touching anything.
The other grid wire on V1 is the blue one on the layout.
It goes from the middle lug of the volume pot to pin 2 of V1.
This run can also be shielded cable as well.
Ground the shield at the ground buss wire.
Double check all the solder joints at V1 and it's leads.
A cold joint or faulty solder joint can give the symptoms exactly as you describe.
https://www.citimortgage.com/Servicing/ ... 19129294|1
The shielded cable goes from the input jack to the 15K resistor which is soldered to pin 7 of V1.
15K is a bit low for a gridstopper, so you may want to try a 33K resistor there.
That resistor acts as a RF (radio frequency) filter on the input.
It really doesn't effect the tone unless you go really high in value.
Common values for that grid stopper is 22K, 33K, 66K.
Make sure the wire from the input jack to the socket is shielded and that it is soldered well at both ends.
The braided shield should be grounded at only one end, which in this case is at the jack.
The end that goes to the tube should have the shielding trimmed back then some heat shrink tubing is put on it to prevent the shielding from touching anything.
The other grid wire on V1 is the blue one on the layout.
It goes from the middle lug of the volume pot to pin 2 of V1.
This run can also be shielded cable as well.
Ground the shield at the ground buss wire.
Double check all the solder joints at V1 and it's leads.
A cold joint or faulty solder joint can give the symptoms exactly as you describe.
Tom
Don't let that smoke out!
Don't let that smoke out!
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Fadedsunburst59
- Posts: 14
- Joined: Tue Jun 23, 2009 3:17 am
- Location: Ringgold,Ga
Re: Question for drhulsey help needed.
structo,
I will surley take a look at this, I tried your link but it took me to a citi mortgage website?
I will surley take a look at this, I tried your link but it took me to a citi mortgage website?