radio noise

Re: radio noise

Jim Breeden

Russ who ?

Re: radio noise

Jim Breeden

Uho - make that Rush who .

You have RFI...

John Kaner

There use to be RFI Filters. Easiest method is to move the radio. My radio is 6 ft away from my lathe...

May take some moving around to find the area outside the field generated by the DVR electronics...

Hope this helps!

Re: radio noise

John K Jordan

My CFL and LED lathe lights do that to my shop radio. I fastened a longer wire to the antenna and routed it away from the lathe. A shielded cable (a piece of coax) with the shield grounded and a piece of unshielded wire on the end would be best.

JKJ

My DVR also creates interference

Dave Paine

I do not use a radio in the shop. For a test I took an old Sony boombox into the shop. Not the best radio, but the only one available.

The FM station I was able to pull in did not have any interference.

I tried a couple of AM stations and both had interference from the DVR. I could hear the motor spin up in the interference.

On this radio all AM stations had a pulse sound, about 1 sec apart. I do not know what this may be, or the source.

I expect the interference is generated by the DVR controller board which generates the pulses to mimic the high frequency power used to drive the motor.

You may have to move the radio, or use an MP3 player to get some music into the shop.

Rush can only get gigs on AM radio?

Dick Coers

Are you listening on a crystal radio?

Re: radio noise

Ed Heuslein

This is common. You can get RFI (Radio Frequency Interference) filters. I believe you can call Powermatic but I'm quite confident you can find them on-line. Just google RFI Filters.

Re: Rush can only get gigs on AM radio?

Jim Breeden

RFI

Ralph Lindberg

Yup, RFI

By way of background, besides owning a DVR-XP, I have a BS in Electronic Engineering & hold an "Extra" (the highest) Ham radio license.

First, since our DVR's are not considered "consumer items" they do not have to met the requirements to limit RFI/EMI put forward for home equipment.

Next there are several modes of RFI; one is transmission of the "radio" signal on the power line. This is simple to check, bring a battery powered radio (like the car radio) into or near the lathe. If you can hear the interference on this radio no power line filter is going to help.

I know my DVR-XP effects the car radios, so I've never bothered to put a filter on the DVR-XP.

The mode I believe the DVR-XP produces is simple broadcast, that means that the lathe itself is broadcasting the radio signals into the air. The only real cure for this would be a properly designed "RF cage" around the "computer" (probably the "clock" that controls the timing).

I've never looking into doing this as a "retro-fit" to my lathe, but it would not be simple.

Me I listen to FM radio or the iPod plugged into it. Me I'd bag Rush, you will probably end up happier not listening to any political-babble any way.

Re: RFI

art demers

Thanks Ralph I also to MP3 old time radio but every so often we need a laugh

Re: radio noise

Michael Schneider

I am not sure if this is possible for you. I keep a cheap amazon tablet in the shop to watch YouTube on. I also use it to stream music and radio stations. I use a cheap blue tooth speaker and enjoy the music and videos.

Most AM stations actually come in stereo over the internet stream.

Not sure if you can do this, but it is an easy way to solve the problem if it an option for you.

Good luck

Michael

Re: radio noise

mikeee12345

I have remote mounted speakers in my shop that are wired back to my stereo equipment. If you used a shielded wire/cable this would limit the speaker wires picking up the noise like an antenna. AM radio frequency is very susceptible to electrical noise created by large motors, welders, drives etc. If you can use the AM radio from a further distance away from your lathe to test and see if it picks up the noise, you can determine how far away the AM radio needs to be and how long of a shielded wire/cable you would need for a remote mounted speaker.

Re: RFI

William Duffield

It's time to get out the roll of Reynolds Wrap and fold up a tin foil hat (for the lathe, not for listening to the classic Canadian rock, of course).