This sale is for a USB power cable for your Perseus SDR receiver that has been professionally assembled. Over the years, I have wanted to take my laptop computer and my Perseus SDR receiver to a remote location for DXing, but did not have a reliable way of powering the receiver away from the AC power adaptor supplied with the receiver. In considering this obstacle, I did a little research and experimentation. The result was in taking a standard USB cable and attaching a 2.5 mm input at the opposite end. The 2.5 mm connector is unusual as it is not the standard 2.1 mm connector and it has heat shrink around it to protect the connection. This 2.5 mm input is attached to the power wires of the USB cable and therefore replaces the AC adaptor that supplies power to the Perseus receiver. The cable is roughly 6 feet in length and allows you have room to place the receiver in a convenient place with regards to the computer or power supply.
Let me explain a couple of things to further elaborate the setup. The Perseus SDR receiver input is stated to require 700 ma in order to operate it and the AC adaptor that comes with the receiver has a 1 amp output so has plenty of power to spare. The USB 2.0 port on your computer can deliver an output of 500 ma and the USB 3.0 can deliver an output of 900 ma. A charging USB port as found on certain adaptors that plug into a cigarette lighter can supply 1 - 2 amps of power. Thus, when you use this USB cable, you would think that it should be plugged into either a USB 3.0 or a charging USB port. However, I found that I was able to use the Perseus and power it using only the standard 2.0 USB output on my laptop computer.
Thus, you have 3 powering options when using this USB cable:
1. Plug it into your 2.0 USB port and it should likely work for you as I am guessing that the 700 ma requirement for the Perseus is the overhead and not a constant power demand. I operated the Perseus for several hours over a period of days and did not experience any issues and my laptop is not a high end model.
2. Plug it into a 3.0 USB port
3. Plug it into a charging USB port
My personal setup was as follows. In using my Asus computer, I have 3 USB ports. One is a 3.0 and the other two ports are 2.0. I had the receiver data USB plugged into the 3.0 port, the USB power cable plugged into a 2.0 USB port, and a separate mouse plugged into the other 2.0 port. The use of a separate mouse enabled me to easily scroll and manipulate the filter bandwidth and notch which is difficult to do using the mouse pad on the laptop. It should be noted that the Perseus SDR was originally designed to operate off of a USB 2.0, but I have the most recent software installed so it also works on the 3.0 USB on my computer. I have 4 batteries for my ASUS computer and this enables me to operate the receiver for around 10 hours....about 2.5 hours for each battery as the Perseus uses a lot of computer processing so this drains the battery more quickly.
Alternately, I had another setup. In this arrangement, I had the Perseus data and the Mouse in the 2.0 USB ports. The Perseus power need was powered by the USB cable plugged into a battery pack that has a USB jack and this arrangement enabled the 3.0 USB port on my computer to be free. This setup allowed for two advantages....much longer operational time for the Perseus as it was not pulling power out of my computer to operate and the use of my Kingston HyperX thumb drive. In freeing up the USB 3.0 port, I was in a position to insert the Kingston HyperX drive and use this to record the various signals from the Perseus.
Since my ASUS computer was purchased for occasional business use, I did not invest in a high end unit with a fast processor. As a result, during recording, the processor cannot work fast enough to keep from hicupping as it writes to the computer hard drive even on the lowest span and the lowest sample rate. By using my HyperX USB drive, I was able to record using a span of 200 KHz and a sample rate of 250. This is not nearly the span and the sample rate of my quad core desktop which can record flawlessly, but is sufficient for me to record the signals I need to and nearby signals within 100 KHz up and down the scale of my primary station being recorded.
I am not as tech savvy as many of you reading this information and you may have considered ways to improve the processing power and speed for your computer, but what I have come up with works for me and enables me to now do some off site DXing in the mountains about a half hour from my home. Alternately, you could use the same USB cable that I am selling to connect the Perseus SDR to your automobile battery during an emergency. If your car does not have a USB input, you can purchase one here on Ebay for under $10. I think I paid $5.95 for the one that I acquired.
I am sorry that I do not offer support for operating the Perseus SDR receiver. For such a thing, you will need to do your own research and experimentation or you will need to join the Yahoo user group and pose your questions there. This sale is for the USB power cable only. Thank you for your understanding.
I am happy to ship this USB cable to you wherever you live. In the USA, the cost of shipping is $3.00 via first class mail or $6 via priority mail. Outside the USA, the cost to ship via first class mail is $9 and the cost for priority mail is $26. Please remember that the shipping cost does not include any import, customs, or VAT fees that you may also be required to pay upon delivery.
Payment to be via Paypal within 3 days of purchase.
Penna residents are reminded that they are responsible for the 6% state sales tax.
Thank you for taking the time out of your busy day to look at my Ebay listings!
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