I bought six of the System Blue digital filter chips from Ebay, but used only four of them.  LTC1569CS8-7 LTC1569-7 SOP-8.

I offer the remaining two free to a good UK home.  (I've nothing against the rest of the world, but I don't fancy fighting customs forms, etc.)

They were stupidly expensive (and not in stock) from normal UK component distributors, but cheap from Hong Kong.  The four I've used seem to work.

(Back when I worked for a UK chip manufacturing company, some of our chip batches that failed production test would sometimes turn up in Chinese-made products.)

https://www.ebay.co.uk/itm/154019932554

I don't know how this forum supports messaging, but Gypsum@pobox.com should find me.

Carl

When your signals get into the Christmas Spirit.

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Hallo,

ich hätte ein komplettes System RED abzugeben:
PCB 10.3 / 12.3 komplett bestückt und funktionsfähig aufgebaut
inkl. 2 elektr. geschirmter Ferritantennen, GPS-Antenne und Netzteil.

Bei Interesse, bitte PN an mich.

Viele Grüße.SHAREit Appvn

http://lightning.nmt.edu/nmt_lms/

https://www.washingtonpost.com/weather/2...pped-it-d/

https://www.washingtonpost.com/weather/2...ts-wrapper

Node 1445 has been operating for a number of years. I am looking for a new home for it.

Complete self assembled system with ferrite core antennas, central unit, remote amplifier and GPS receiver.

Hi,
can you tell me what is the best connection on the blue preamp between loop antenna or ferrite antenna? it has 3 inputs per antenna E1-E2-GND

Ferrite = E1-E2 and GND what is the correct connection?

Loop E1- E2 -?
Loop E1- GND -?
Loop E2- GND -?
(after soldering the bridge under the pcb)

Thank you for bringing me some details.

kind regards

Patrick

I have tried to look at a few posts that have been moved and I can't seem to view them. It seems to suggest I don't have the permissions. One for the IT team to look at.

Well I build mine the other weekend and have had it running for a bit now. Could do with some advice on how to interpret the data I am getting so that I can improve on my results.

Not get a lot of contacts so far but I haven't mounted anything in a final location. 

I am looking to design a build a holder for the Ferrite rods, I have 3 of them and was wondering is it best to lay them in a triangle as seen on some of the manual shots or mount them at 90 and the 3rd at 90 vertically? I have a laser cutter and plan to use that to cut out the brackets but before I design them has anyone else already done designs.