u/spraypaintyourass

I’m dealing with what appears to be a pretty severe RF/EMI issue affecting condenser microphones and possibly other studio equipment in my studio recording setup, and I’m looking for advice from people with RF/EMC experience.

The environment:

• I think my studio is relatively close to a cellular tower/telecom infrastructure.

• The issue sounds like broadband hiss/static, not classic hum.

• It’s most noticeable on condenser microphones.

• A Shure SM81 is almost completely immune.

• A BeezNeez BU87iC (Neumann U87 clone) is the worst offender.

• A Rode NT1 is affected too, but less severely.

The strange part:

• Touching the lower body of the mic near the XLR area significantly reduces the noise.

• Moving the XLR cable changes the noise.

• Shorter XLR cables slightly reduce the noise.

• Ferrite chokes only helped a little (if at all).

• Star quad cables with Neutrik connectors did not meaningfully solve it at all.

Things I’ve already tested:

• Multiple interfaces (Allen & Heath CQ18T and Scarlett Solo)

• House power completely shut off (monitored from laptop)

• Different power outlets

• Different microphones

• Ferrites on XLR/power

• Different cable routing

What makes me think this is environmental RF:

• The issue persists across multiple condensers.

• Cable geometry affects the noise.

• The room seems “RF hot.”

• Powered monitors also exhibit faint similar static even under stripped-down tests.

At this point I’m considering environmental RF mitigation/shielding experiments and I’m about to buy an RTL-SDR to start mapping RF hotspots in the room.

My questions:

1. Does this sound like classic common-mode RF ingress / EMC susceptibility?

2. Are there specific frequencies or sources I should investigate first?

3. Is an RTL-SDR sufficient for initial diagnosis?

4. What practical shielding/mitigation approaches would you try before going full Faraday-cage territory?

5. Are there known studio EMC tricks I may be overlooking?

Disclaimer: I used ChatGPT to help me organize this post, but all of the thoughts and stated issues are (unfortunately) mine.

Hi everybody, I am in search of an Italian made inox 92FS compact, double stack, without the “a1 rail”. Does anybody know if beretta ever made this gun? I have seen the “custom carry ii” which is from around year 2000, single stack, and very rare, but I’m more wondering if the regular made-in-Italy 92fs compact from more recent years was ever made in inox and without the a1 rail. Thanks in advance!