Intruder at the top of the 20 meter amateur band?
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Intruder at the top of the 20 meter amateur band?
1–10 of 187 posts
Re: Intruder at the top of the 20 meter amateur band?
#2Do exchanges like HF traders? I know HF traders themselves justify their own existence by claiming they provide liquidity to the markets, but I've always just sort-of rolled my eyes at that.
They only extract value and provide none, in my opinion, tax the profits heavily. I think every exchange should pad each order by a random number between 0 and 250ms, it would take care of it. The company profiled in this video add lag https://www.youtube.com/watch?v=d8BcCLLX4N4
Re: Intruder at the top of the 20 meter amateur band?
#3Do exchanges like HF traders? I know HF traders themselves justify their own existence by claiming they provide liquidity to the markets, but I've always just sort-of rolled my eyes at that. They only extract value and provide none, in my opinion, tax the profits heavily. I think every exchange should pad each order by a random number between 0 and 250ms, it would take care of it. The company profiled in this video a…
I'm sure the exchanges like the buckets of money that HFTs pay them, even on their discounted commission fees. There's also billions in industry just around supporting HFTs, including FPGAs, silicon fab, networking equipment, etc. The cost to society of killing HFTs would probably be fairly large and imo the drawbacks are mostly minor.
Re: Intruder at the top of the 20 meter amateur band?
#4There's an update at the bottom:
- Delmarva Broadband is authorized 14.35-14.99 MHz at 186 kW. Contact is a law office in DC. See https://apps.fcc.gov/els/GetAtt.htm
- … and M-Wave is authorized the 14-14.99 MHz at 16 kW. See https://apps.fcc.gov/els/GetAtt.htm
Re: Intruder at the top of the 20 meter amateur band?
#5Wouldn't a high frequency trader be building point to point links and thus benefit hugely from highly directional antennas? Seems like that would help with the interference quite a bit.
Re: Intruder at the top of the 20 meter amateur band?
#6Wouldn't a high frequency trader be building point to point links and thus benefit hugely from highly directional antennas? Seems like that would help with the interference quite a bit.
At that power any spill would still be a very strong signal.
Directional antennas are like gun silencers. They cause the signal to be many times weaker and it seems a lot until you figure out that the receiver works on a log scale and whatever is left is still registered as a strong signal.
Re: Intruder at the top of the 20 meter amateur band?
#7Wouldn't a high frequency trader be building point to point links and thus benefit hugely from highly directional antennas? Seems like that would help with the interference quite a bit.
A point to point link from Chicago to NYC would require many hops along the way, which is what they have with microwave today. The whole point of experimenting with the 20 meter band is to eliminate those hops.
Re: Intruder at the top of the 20 meter amateur band?
#8Do exchanges like HF traders? I know HF traders themselves justify their own existence by claiming they provide liquidity to the markets, but I've always just sort-of rolled my eyes at that. They only extract value and provide none, in my opinion, tax the profits heavily. I think every exchange should pad each order by a random number between 0 and 250ms, it would take care of it. The company profiled in this video a…
I'm sure the exchanges like the buckets of money that HFTs pay them, even on their discounted commission fees. There's also billions in industry just around supporting HFTs, including FPGAs, silicon fab, networking equipment, etc. The cost to society of killing HFTs would probably be fairly large and imo the drawbacks are mostly minor.
All of the money HFTs make would have been made by other investors, presumably for reasons more related to predicting or responding to actual changes in market conditions. HFTs are parasites that basically leech value from those trades by executing them faster than you can, and forcing you to buy at a higher/sell at a lower price. I think the platonic ideal of a marketplace involves making money by determining the actual value of goods, not stealing information from others and jumping the line.
They also contribute to a lot of market instability, see for instance the flash crash[1].
Re: Intruder at the top of the 20 meter amateur band?
#9The inexact coordinates in the image lead to the front yard of some farm. Now I can't stop thinking of Kash Hill's Maxmind story
ref: https://www.google.com/maps/place/41°36'00.0"N+88°36'00.0"W/
ref: https://splinternews.com/how-an-internet-mapping-glitch-turn...
Re: Intruder at the top of the 20 meter amateur band?
#10Not sure I understand the point of using that band past amateur radio. Around 20m band is terrible for point to point communications. The antennas are huge, the bandwidth is low, the noise floor is really high and it’s prone to just about every annoying atmospheric condition possible.