Re: [VLF_Group] Re: E-field rx, front-end protection
- I plugged prx-e1 into a BT878 card which samples at 448k/sec.
Here is a live spectrum, 0 to 224kHz in one big wide image,
Updates every 3 minutes or so. Hopefully browsers will provide
scroll bars! The receiver begins to roll off above about
100kHz but the equivalent input noise is low up to a few
Not being at all familiar with the LF bands, I've no idea
what all those signals are. Are there any weak ones that
I can look for as a sensitivity test?
- Got a good price for the PCB fabrication from a local
(Todmorden) manufacturer and I added up the parts cost,
In UK pounds for the populated boards:
prx-e1 E-field front end: 23.67
prx-t1 Filter, line driver, PSU: 52.73
prx-r1 Line receiver: 24.42
About 100 quid for the set, not including boxes and
cables, etc, and doesn't include assembly and test.
Well that's a bit cheaper than I thought it would come
to. Will complete the breadboard testing this month
and have a set of boards built up in April and then some
Further back in the pipeline is prx-h1 which is an
H-field front-end developed from the loop receiver I
currently use, and a -p1 isolated power supply.