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Author Topic: Constant S7 noise on 40m?  (Read 10971 times)
KJ6ZOL
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Posts: 390




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« on: July 15, 2014, 01:08:33 PM »

I am getting a constant hash on 40m that pegs my S meter at 7. I was listening to a net a week or so ago, and net control was checking people in, and every signal that he could hear but I couldn't had an S less than 7. Net control was about 100 miles away from me. The only thing I can think of is a marijuana grow house somewhere nearby, but I don't have DF equipment, and don't want to get shot by a grow house caretaker. 20m doesn't have the hash. What can I do?
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WA2TPU
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Posts: 210




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« Reply #1 on: July 15, 2014, 02:17:15 PM »

To-KJ6ZOL...

S7 noise....that's truly AWFUL.....Call your power company and have them come out to check their distribution lines. It could be easily traceable to a arching insulator,etc. Maybe you'll get lucky and they'll find the problem.

As far as your statement--"The only thing I can think of is a marijuana grow house" well....I guess I wouldn't use the words "marijuana and HASH"  in the same posting!! hi hi.

I hope you can get the S7 noise problems fixed.
Best regards with many 72...73.
Don sr. -- WA2TPU/Qrp --
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NK7Z
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Posts: 847


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« Reply #2 on: July 15, 2014, 05:18:18 PM »

To-KJ6ZOL...

S7 noise....that's truly AWFUL.....Call your power company and have them come out to check their distribution lines. It could be easily traceable to a arching insulator,etc. Maybe you'll get lucky and they'll find the problem.

As far as your statement--"The only thing I can think of is a marijuana grow house" well....I guess I wouldn't use the words "marijuana and HASH"  in the same posting!! hi hi.

I hope you can get the S7 noise problems fixed.
Best regards with many 72...73.
Don sr. -- WA2TPU/Qrp --

Before you call the power company, make sure it is not you causing the problem! 

I have a multi part blok on dealing with RFI...

See: http://nk7z.net/rfi-now/
 
For part 1.  There are links to the next part at the end of each one...  I am currently working on Part 3...  1 and 2 are published...
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Thanks,
Dave
For reviews and setups see: http://www.nk7z.net
KJ6ZOL
Member

Posts: 390




Ignore
« Reply #3 on: July 15, 2014, 05:51:23 PM »

To-KJ6ZOL...

S7 noise....that's truly AWFUL.....Call your power company and have them come out to check their distribution lines. It could be easily traceable to a arching insulator,etc. Maybe you'll get lucky and they'll find the problem.

As far as your statement--"The only thing I can think of is a marijuana grow house" well....I guess I wouldn't use the words "marijuana and HASH"  in the same posting!! hi hi.

I hope you can get the S7 noise problems fixed.
Best regards with many 72...73.
Don sr. -- WA2TPU/Qrp --

Before you call the power company, make sure it is not you causing the problem! 

I have a multi part blok on dealing with RFI...

See: http://nk7z.net/rfi-now/
 
For part 1.  There are links to the next part at the end of each one...  I am currently working on Part 3...  1 and 2 are published...


Well, the noise is constant all day every day, so it's not a grow. I have a laptop right next to the radio. I also have a charger for a Baofeng HT in the vicinity too. I will check what you recommended.
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KJ6ZOL
Member

Posts: 390




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« Reply #4 on: July 15, 2014, 06:13:07 PM »

Well, I started unplugging stuff, and it turns out that the RF source is...the charger for my Baofeng UV-B5 HT, which sits right next to the radio. Unplug the Baofeng, the noise disappears. Plug it back in, it comes back. I only have the Baofeng ready in case of emergency, I don't actually use it. I will have to figure out what to do. Where did you buy your ferrite cores, NK7Z?
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NK7Z
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Posts: 847


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« Reply #5 on: July 16, 2014, 04:32:58 AM »

Well, I started unplugging stuff, and it turns out that the RF source is...the charger for my Baofeng UV-B5 HT, which sits right next to the radio. Unplug the Baofeng, the noise disappears. Plug it back in, it comes back. I only have the Baofeng ready in case of emergency, I don't actually use it. I will have to figure out what to do. Where did you buy your ferrite cores, NK7Z?
Hi,
I should put a link in for that and will, I get them from Mouser at http://www.mouser.com/...  Good luck, you have 99% of the problem solved now, and best of all it is within your own control!  That makes it easy to fix...  I am looking for a problem that has taken over a year to get close to...  Remember if you use ferrites, that if you can wrap the cable through the ferrite, it is WAY better than just putting two in series on the cable...  See K9YC's papers locate at  http://audiosystemsgroup.com/RFI-Ham.pdf. If you read nothing else but that you will be a lot better for looking at his work!  Take care, glad to have been able to help.
Logged

Thanks,
Dave
For reviews and setups see: http://www.nk7z.net
KJ6ZOL
Member

Posts: 390




Ignore
« Reply #6 on: July 16, 2014, 11:37:46 AM »

Well, I started unplugging stuff, and it turns out that the RF source is...the charger for my Baofeng UV-B5 HT, which sits right next to the radio. Unplug the Baofeng, the noise disappears. Plug it back in, it comes back. I only have the Baofeng ready in case of emergency, I don't actually use it. I will have to figure out what to do. Where did you buy your ferrite cores, NK7Z?
Hi,
I should put a link in for that and will, I get them from Mouser at http://www.mouser.com/...  Good luck, you have 99% of the problem solved now, and best of all it is within your own control!  That makes it easy to fix...  I am looking for a problem that has taken over a year to get close to...  Remember if you use ferrites, that if you can wrap the cable through the ferrite, it is WAY better than just putting two in series on the cable...  See K9YC's papers locate at  http://audiosystemsgroup.com/RFI-Ham.pdf. If you read nothing else but that you will be a lot better for looking at his work!  Take care, glad to have been able to help.

I have unplugged the Baofeng for now. I will look at ferrite solutions, or maybe just plug it in overnight once a month to keep the HT charged. As I said, this HT is my go-to for emergencies. The UV-B5 doesn't have a wall wart like the UV-5R series, it just has a simple two prong plug and an unshielded cord leading to the charger. I figure that the electronics are all in the charging cradle.

As for your problem, grow houses are a PITA. I looked up your call, you're in weed country so grow houses are a BIG problem. You can't go knocking on his door, either. Then again, the house could be completely unoccupied and a caretaker checks in once a week to look things over. The MO of the Chinese gangs here in CA that use grow houses is to gut the house, bypass the meter, and fill the entire house with pot. Nobody lives there, and nobody is there most of the time.
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NK7Z
Member

Posts: 847


WWW

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« Reply #7 on: July 16, 2014, 12:28:00 PM »

Well, I started unplugging stuff, and it turns out that the RF source is...the charger for my Baofeng UV-B5 HT, which sits right next to the radio. Unplug the Baofeng, the noise disappears. Plug it back in, it comes back. I only have the Baofeng ready in case of emergency, I don't actually use it. I will have to figure out what to do. Where did you buy your ferrite cores, NK7Z?
Hi,
I should put a link in for that and will, I get them from Mouser at http://www.mouser.com/...  Good luck, you have 99% of the problem solved now, and best of all it is within your own control!  That makes it easy to fix...  I am looking for a problem that has taken over a year to get close to...  Remember if you use ferrites, that if you can wrap the cable through the ferrite, it is WAY better than just putting two in series on the cable...  See K9YC's papers locate at  http://audiosystemsgroup.com/RFI-Ham.pdf. If you read nothing else but that you will be a lot better for looking at his work!  Take care, glad to have been able to help.

I have unplugged the Baofeng for now. I will look at ferrite solutions, or maybe just plug it in overnight once a month to keep the HT charged. As I said, this HT is my go-to for emergencies. The UV-B5 doesn't have a wall wart like the UV-5R series, it just has a simple two prong plug and an unshielded cord leading to the charger. I figure that the electronics are all in the charging cradle.

As for your problem, grow houses are a PITA. I looked up your call, you're in weed country so grow houses are a BIG problem. You can't go knocking on his door, either. Then again, the house could be completely unoccupied and a caretaker checks in once a week to look things over. The MO of the Chinese gangs here in CA that use grow houses is to gut the house, bypass the meter, and fill the entire house with pot. Nobody lives there, and nobody is there most of the time.
Yup...  Makes things interesting...  Smiley
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Thanks,
Dave
For reviews and setups see: http://www.nk7z.net
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