Post Number: 3
|Posted on Monday, June 10, 2013 - 9:48 pm: |
if i boost lot of tone... i hear the radio on my amplifier..
how to fix it?
Post Number: 146
|Posted on Tuesday, June 11, 2013 - 7:15 am: |
RF interference isn't uncommon, but it is uncommon on Alembics. The shielding inside the electronics cavity is really good. Try isolating the noise by plugging into a different amp. If it goes away, it's localized to the amp, not the bass. If it's still there, check the electronics cavity of the bass and see how much shielding is in there. You may need to add some more. (Copper foil or something).
Post Number: 1752
|Posted on Tuesday, June 11, 2013 - 8:57 am: |
Also a broken ground issue on your cable can cause RF interference as well. Try using a different lead.
Post Number: 386
|Posted on Tuesday, June 11, 2013 - 9:05 am: |
How old is your bass? I believe that Alembic has upgrades for older basses to specifically address RF interference. RF that wasn't an issue when the bass was first designed, but has become an issue in the new age of cellular, etc......
Post Number: 982
|Posted on Wednesday, June 12, 2013 - 5:45 am: |
Joel, I live in Brazil and this is a constant issue around here. There are some areas that it doesn't bothers you, but near Radio Stations it can be really annoying. I'm writing that because saw you live in Indonesia and not every country is rigid regarding Radio and TV emissions outside US (in Brazil, we have many illegal Radio Stations that keeps invading non authorized frequencies, usually the ones I "tune" on my Rogue). Believe me, Jerry, an Alembic can be VERY sensitive to RFI depending on how laws are loose about radio transmissions.
Using some ferrite bead along PUs cable before Board (preamp) can reduce RFI a lot, but I admit that isn't enough to solve it completely. Check if you have those cylindrical magnet inside your Bass and if both cables are winded trough it. Also, if it is a Series, be sure to match gain on Dummy with the PUs properly (there are some directions on FAQ or Must Read). It is meant to kill Hum (AC induced noise), but may help on this too.