Ok. Let's Update this hardware thing . I have recently received for eval and feedback, an 'operator' produced Blue sys based on the Blue 19.5 production, calling itself 19.7, but recognized currently as a 19.5 by the Blue Servers... This system is currently under limited mfgr and distribution, but one to consider...
if/when it's actually available for order. I've done a bit of research on the supplier's 'vitals', and have confidence in him, and this particular version looks good on initial testing, without active data as yet... It has not received or sent its "First Light" er... "First Lightning". That will come as soon as I can fabricate 'wheelies' for it, and get H fields online. E probe will wait till last...
NOTES -- FYI
This controller board came with some very nice 'feet' attached, clear silicone. Good idea. Stands the board off ±4mm
A. C519, C520 -- 1000µF/16v-- these suckers are ±20mm tall.
Board's Feet + tall caps greatly influenced my case build concerns.
Required case height of about 36mm high for my material....and DEFINITELY added to expense of installing the
(
B) 'optional' SMA jacks and adequate adapters to extend through cover.
My single M-to-F adapters need to have another M-F stacked on top, and since they're so blamed hard to find, my extras won't be here for another week or two... I mean, M-F RP versions are all over the place, but 'standard' M-F... at really reasonable costs...??? don't really want to talk about it.That won't affect most folks, since that's an option, but I really like having that O-Scope handy...
C. Serial and swd blocks are now optional? (not installed) Not a bad idea, leaving them off. Add 'em if you want 'em
D. Reset/Boot buttons weren't installed...???
E. No E probe connector block. NOW, the Eprobe block has been a bit problematic for some over the various versions, and the 'on-board' probe size and design appears changed from what I had on my original 19.1 pre-release... I'm saving this.. don't have time for it right now... hmmm..
F. And of course, those optional digital filter ics are not included.
FIRST Impression nit-picking... ...This board uses the 'deprecated', troublesome, and much maligned USB-MINI connector for USB Power. I suspect that may be upgraded???
...The height of C519-C520 ... no big deal for most of us... those are quite necessary on the 5V usb power input.
...Puzzled why the reset/boot switches were omitted....
...Query the use of 'open' RJ45 jacks on Controller and H preamp... Contamination? Noise? Do appear to be shield grounded, however.
...Coax connectors come with a 'ground' tab. Now, knowing how some minds function, if there's a tab, must be necessary to connect something to it. NOT SO... These are common SYSTEM grounds, NOT EARTH. Your 5V usb power supply theoretically has no 'earth' connection, isolated output. We've gone to great lengths to isolate earth loops, noise, etc... on System BLUE, even keeping the Analog Chain on a virtual rail, once signals enter the controller... no EARTH ground should be necessary! That may even be unsafe, if running Eprobe outside! The E probe coax shield is ALSO system common... DON'T take it to Earth! Leave the system 'above earth'!
This is exactly why we say 'use UN-Shielded' RJ-45 cable from Controller IP to your network/ router/modem, whatever. Don't bring ground references into conflict. USE SHIELDED cable from controller to H preamp... backs up the SYSTEM common to help improve S/N conditions....
...yeah, I realize that is REALLY nit-picking, but in general, us old timers on BT know how confusing some of this might be... we've been down those roads, and designed the tee shirts.
Soon to join it's ancestors on the Blitz Wall...
Cheers!
Mike