开云体育

David, Thank you for a very detailed explanation! I have printed this out and stuck it in the notes portion of the project folder. This is all new to me. I have printed Eduardo's code out and have

A bit more clarification on the values of the divisors: The top level grid squares are 20 degrees longitude by 10 degrees latitude, so the 2000000 used as divisor in the MH[0] calculation is

I don't know if there's a particular part you're hung up on or not but here goes: The basic idea is that they're converting lat/lon to grid and subgrid coordinates using integer arithmetic rather

I am hoping somebody could explain this piece of code to me. ?I'm just stumped! I understand the basics of converting GPS coordinates to WSPR grid squares, and I can do it by hand with paper, pencil,

Looks like Eduard is correct. The resonator in my BOM is too small for the footprint. Fortunately that is only $3 worth of parts... Thanks for pointing it out. -Dave

I have built a some smd Steve Weber ATS radios by hand. I made a "doofus"? hihi from a piece of coat hanger wire. It has some fishing weights in the middle and a sharpened end that you use to hold

That's what the "safety squint" and the Great Outdoors are for :-) John K5MO

The resonator was the one recommended by Mikael at the start of the thread. I have my boards and I'll check the fit when the parts show up this next week. Nice to see a full BOM, it would have saved

The resonator should be bigger. Or the PCB footprint smaller. I came up with the BOM, see below: Resistors R1 4k7 0402 R2 4k7 0402 R3 DNP 0402 R4 4k3 0402 R5 100k or 110k 0402 R6 10k

Good light, good magnification, and no coffee! I thought the same thing. How much weight is saved by not using something more usable like 0802? It will be a good challenge though..

those are some teenie tiny little parts..how do you plan to solder them? At one time I thought about using a toaster oven, but was warned that fumes from the solder paste are toxic and possibly

https://www.digikey.com/short/zt197z

Here is a link to what I found on Digi-key. No promises, but this is what I am ordering. All of the SMD's , Cells, and CPU's are coming from ebay.

Thanks for this thread, I working the same path, and this helps a lot !

https://pl.aliexpress.com/item/4000299463420.html?spm=a2g0s.9042311.0.0.27425c0fFYisZk W dniu 14-01-2020 o?03:32, Big Dave pisze: -- SQ9GOL Peter Greetings from Poland website:

39x19 from https://www.aliexpress.com/item/32739848133.html?spm=a2g0s.9042311.0.0.887c4c4db5FM74 or 39x22

Any suggestions for Solar cells?

My flights used: TCXO : https://www.digikey.com/product-detail/en/taitien/TXETBLSANF-27.000000/1664-1269-1-ND/6126580 UBLOX MAX-M8C RESONATOR IS NOT CRITICAL, as long as it fits the PCB footprint

Any ublox will work but the footprint is made for the MAX modules, Im using the Max7 as thats avalible quite cheaply from

OH I guess I should add: Is there a particular version of the GPS to use? The schematic specs, max6 and the PDF mentions Max8. Max 8 comes in a bunch of different versions. -Dave