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+--- Thread: How to Optimize (/showthread.php?tid=4079)
How to Optimize - davidmc36 - 2025-07-04
I installed ferrite antenna in attic of garage. It is a single attached garage. I replaced the 1 foot leads from antenna to pre-amp to avoid mounting it up with antenna. There is about 20 feet of 26 ga twisted pair shielded going to pre-amp. There is about 20 feet of Cat5 from pre-amp to amp.
I wonder what might be the best way to optimize performance by removing noise floor?
1. Provide cleaner power supply
2. Shorten twisted pair back to 1 foot and use 20 feet of Cat5 to amp
3. I have 100 feet of direct burial Cat5 on hand that could run out to a weatherproof enclosure up to 75 feet away from the house.
I seem unable to turn gains up past 10x2 or it goes steady interference.
Any advice would be appreciated.
Image of vIn
RE: How to Optimize - davidmc36 - 2025-07-14
IDK
I get the idea I have likely achieved about the best it will be in my garage attic. I guess it is working at least reasonably well as it seems quite active.
Can anybody give me an opinion on how it is running?
I moved everything away from lights and wires as much as able. It sure runs the noise floor up with the 4 foot fixtures with T8 lamps replaced with direct pop-in LED lamps. A ground post into the earth helps.
I figured out how to get it remote from the house though. Install a PoE switch in the garage. Run my direct burial CAT5 out to a built enclosure. Use a PoE to 5V splitter so no power on Ethernet but 5 available for unit.
Has anyone ever done this?
RE: How to Optimize - dupreezd - 2025-07-14
MMM I figured out how to get it remote from the house though. Install a PoE switch in the garage. Run my direct burial CAT5 out to a built enclosure. Use a PoE to 5V splitter so no power on Ethernet but 5 available for unit.
Has anyone ever done this?
Hang a scope on that 5v supply and see if the power is clean with no ripple, should be slightly above 5V. My power supply reads 5.1V
Yes, there a folks here that did this.
RE: How to Optimize - davidmc36 - 2025-07-15
I saw that Vin IS a bit low. And looks dirty. I wonder if a linear would be smoother than switching.
Gotta plug in the DSO tomorrow.