I’m really glad I found your channel a while ago. I enjoy the content very much. I would love to see some articles on how to build some of these things. Thanks. 73.
Nice bit of kit for LF. Are there any diagrams or circuit descriptions online for you signal amplifiers? I have a friend that is getting into LF and when I tell him about your video it will be many questions. Your videos are never too long or boring. Feel free to go on. I’m certainly good with it. 👍
Hi - Ill see what I can find once we stop traveling - the web site of DK7FC may have one or two Very high impedance ccts but I don’t think he has the one I use here. It maybe while but ill find it - single chip design
Try lake water surface waves turn to ELF signal and record it, and playback 60-120 times faster. Small electrode submerged in water can detect water waves ( changes resistance ).
Hi , very informative about very low frequency bands , Lovery countryside too, how long you been state side , my son lives in Cleveland Ohio . Regards 73s de G8rde
Hi Alan see kl7l.com/Dk7FCELF.jpg this is a messy schematic but hope you can understand it - I feed 12vdc clean power down a pair of cat5 wires and installed a 12>9vdc regulator, ensuring decoupled well. Audio comes up to the house on another pair (100m of cat5e, overall screened, earthed at antenna end only to copper tube into ground, then into isolation transformer here in the house then into a sound card - the isolation is vitally important or noise from your pc/shack will be sent back down to the antenna - mine is on a pot core 77 material and around 5:1 ratio to increase the Z into line input and good down to 2Hz or so - probably not the right material but it works. Antenna does work so well in wind and rain of course due to microphic/emi
@@hellozerohellozero Thanks for the response and schematic. I live in a rural area here in SE MN. We do have underground AC to the house and I can get hundreds of feet away from anything AC. I had been thinking down the same path regarding decoupling the audio with isolation transformers. I have a portable whistler receiver that I have had for years. I've thought about remounting it in a weather-proof case, providing external power and running the audio back to the house with cat 5 and a pair of isolation transformers...or build an amplifier from scratch. I'll have to look into the LMP7721 op amp. Thanks again. 73's Alan
thanks for this - Yes I was trying to "de complicate" the verbiage - the Electric field vertical covers all of those and, down to 1Hz and up to over 40kHz VLF - I think Ill modify the title to cover all eventualities!
That aria is a blessing few can enjoy thanks for sharing it
Thanks so much I'm just getting into radio astronomy but I do have a background in the theory so I find the practicalities fascinating.
Thanks jonathan - yes the practicalities of engineering. - I find making making mistakes my best learning tools
I’m really glad I found your channel a while ago. I enjoy the content very much. I would love to see some articles on how to build some of these things. Thanks. 73.
Nice bit of kit for LF.
Are there any diagrams or circuit descriptions online for you signal amplifiers?
I have a friend that is getting into LF and when I tell him about your video it will be many questions.
Your videos are never too long or boring. Feel free to go on. I’m certainly good with it. 👍
Hi - Ill see what I can find once we stop traveling - the web site of DK7FC may have one or two Very high impedance ccts but I don’t think he has the one I use here. It maybe while but ill find it - single chip design
Could you ask that ELF what I am getting for Christmas this year?
Try lake water surface waves turn to ELF signal and record it, and playback 60-120 times faster.
Small electrode submerged in water can detect water waves ( changes resistance ).
Hi , very informative about very low frequency bands , Lovery countryside too, how long you been state side , my son lives in Cleveland Ohio . Regards 73s de G8rde
Hi - been working away from the UK since 1978, but here in Alaska off and on from 2000 - full time since 2012 =
Can you give any specifics on the ELF amplifier that you use with the 10 meter whip antenna? Is there a schematic for the amp? Thanks!
Hi Alan see kl7l.com/Dk7FCELF.jpg this is a messy schematic but hope you can understand it - I feed 12vdc clean power down a pair of cat5 wires and installed a 12>9vdc regulator, ensuring decoupled well. Audio comes up to the house on another pair (100m of cat5e, overall screened, earthed at antenna end only to copper tube into ground, then into isolation transformer here in the house then into a sound card - the isolation is vitally important or noise from your pc/shack will be sent back down to the antenna - mine is on a pot core 77 material and around 5:1 ratio to increase the Z into line input and good down to 2Hz or so - probably not the right material but it works. Antenna does work so well in wind and rain of course due to microphic/emi
@@hellozerohellozero Thanks for the response and schematic. I live in a rural area here in SE MN. We do have underground AC to the house and I can get hundreds of feet away from anything AC. I had been thinking down the same path regarding decoupling the audio with isolation transformers. I have a portable whistler receiver that I have had for years. I've thought about remounting it in a weather-proof case, providing external power and running the audio back to the house with cat 5 and a pair of isolation transformers...or build an amplifier from scratch. I'll have to look into the LMP7721 op amp. Thanks again. 73's Alan
Elf range is the lowest "3 hz to 30 hz" SLF range is 30 hz to 300 hz , ULF range is 300 hz to 3 KHz
thanks for this - Yes I was trying to "de complicate" the verbiage - the Electric field vertical covers all of those and, down to 1Hz and up to over 40kHz VLF - I think Ill modify the title to cover all eventualities!
No problem with that.. I just got into really low frequency radio... there isn't to much about it on YT
Cool!