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RFI with Phantom Power: Bellari RP503

 
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Bow
Voodoo Audiophile


Joined: 29 Jan 2007
Posts: 77
Location: Yuma, AZ

PostPosted: Mon Mar 26, 2018 4:36 pm    Post subject: RFI with Phantom Power: Bellari RP503 Reply with quote

Howdy gents, long time since I've posted here... but I have an interesting one...

I did the hacking of the circuit board to separate the Pin 1 from the circuit board ground when I picked it up back in 2008...

I have noticed I'm getting RFI when using Phantom Power... I haven't disconnected the Mic cable from the Preamp yet and try it, but with the mic disconnected, it is still doing it...

My RP503 is getting up in age (I've had it around 10 years), I'm wondering if I am losing a filter cap in the Phantom Power Supply?


Anyone else seen something like this?
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Bow


Quite possibilly the only 3.3 Khz wide Icom IC-718 in the world...
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Bow
Voodoo Audiophile


Joined: 29 Jan 2007
Posts: 77
Location: Yuma, AZ

PostPosted: Tue Mar 27, 2018 1:13 pm    Post subject: Reply with quote

Well, It seems it isn't the Bellari after all... it is the MXL 2008 mic...



The is the Mic Element negative signal ohm'd out to Pin 1 on the XLR connector...

Muthaf$#%'n MXL mics obviously don't pay attention to the Pin 1 rule... the Shield pin goes to the Case, NOT the Circuit Board Ground! UT
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Bow


Quite possibilly the only 3.3 Khz wide Icom IC-718 in the world...
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