My First Build the GR-1SF

[Nickosaurus]

I'm with Wokks. Complete the circuit in the guitar first, check continuity of circuit. If the ground circuit isn't complete that's why it's humming I think

I've never had RFI issues in a humbucking guitar

[ShazzRandom]

@Shazzrandom: I'm not an expert in guitar cabling, but you seem to have a lot of long unshielded cable runs.

To the more knowledgeable guys, could these be the issue, picking up noise from TV, lights, etc?
As an electrical engineer who hasn't touched real electrical engineering for 20 years it all looks like a lot if nice antennas.

Shazz, were you in the same conditions when you tested it clean the first time? Ie. did you have less electrical devices on around you and were you testing in the same place in your house?


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Heya Fred, yes, exact same environment. I had my phone and iPad, guitar amp and also the soldering iron. I'm thinking the unsheilded cables could be a lot of the issue...

[ShazzRandom]

Shazz on the test video the circuit isn't earthed to anything so it probably will buzz. Some of the solder is caked on the back of the pots so I am thinking one of the pots aren't earthed properly and not making full contact with a pot casing.
Double check that no earth points on pots have come apart from the casing
Otherwise re-do the soldering with braided wire might be the best option.
Also Fred has made a good point about any electrical devices nearby could be causing interference.
If I build a hollow body in the future I will only use braided wire from experience from other buillders.
That white wire not connected to anything I presume is the bridge post earth wire. Try exposing some bare wire and hold it with your fingers to see if that earths the circuit and stops the hum

I will double check the earthing
I'm thinking I'll take DB's advice hock it and get better pots and braided cable. I think the shieding could be a lot of it with everyone's opinions and knowledge. That was the main issue my husband had with his 355 build.

[ShazzRandom]

Hey Shazz,
Personally, I would file the loom in the bin and start again but with better quality wire and pots.
I reckon your problem is a dodgy pot?.. Thoughts guys?

I think you could be onto something here DB! Whether the husband allows me to or not is a different story I have also found that you can buy pre wired looms too haha

[ShazzRandom]

Oh No! Quick! Kill it! You are picking up 2ST radio!!!!
(Shazz will know what I am talking about)

Bahahahaha! How do you know 2ST? WA is a bit far away! I'm surprised

[wokkaboy]

Shazz, DB grew up in or near Bowral and the surrounding areas, he's only been living in WA for about 3 years or so

[tonyw]

Shazz, DB grew up in or near Bowral and the surrounding areas, he's only been living in WA for about 3 years or so

Small world i lived in Robertson for awhile...

[ShazzRandom]

Shazz, DB grew up in or near Bowral and the surrounding areas, he's only been living in WA for about 3 years or so

Ahh!! That makes a lot of sense!! It's a beautiful place over this side of the country

[ShazzRandom]

Small world i lived in Robertson for awhile...

They have excellent pies!!

[dingobass]

Ahhh, the mystical town of Robbo
When I was kid, before the dams got built Robbo would often be lost in thick pea soup fogs....
Great Cheeze, and the best potatoes in the world come from Robbo!