On 8/24/2011 3:59 AM, Pete Smith wrote: > Do you have the capability to measure their response? If they claim > they are essentially flat down to 5 MHz, and they don't fall off a > cliff below that, they might be a useful alternative to homebrewing, > or certainly to the $30 Mini-Circuits splitter.
I have some measurement capability, but with many other things on my plate, hesitate to repeat work that a very capable guy like Jack has already done. Although I haven't seen his data, I would certainly trust it, and would expect it to show degraded response and/or isolation outside the design range of the product involved, and for lower quality el-cheapo consumer products. One of the key advantages of the Mini-Circuits splitters is that they typically offer 20-30dB of isolation between outputs within their design range. No, I would not expect response to fall off a cliff at the lower frequency limit in a Mini-Circuit spec, but rather for performance to gradually decline at lower frequency. There are a few Mini-Circuits splitters, that for example, should still work on 160M, albeit with reduced isolation and/or degraded response. I have a 1x4 that I'm using to split my Beverages to two main K3 RX and one Sub RX, and a 1x2 that I'm using to split a 6M preamp to main RX and Sub RX. While I could split the preamp with a Tee, the splitter provides a lot of isolation, which has nearly eliminated the strong birdies I used to hear with both RX running when I used a Tee to split the preamp. I found all of my splitters at hamfests for a few bucks. 73, Jim K9YC _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
