开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. HABalloon
  2. Topics

ICT WSPR Tracker BOM?

Chuck KG5CA
 

Thanks...will check it out.
--
Chuck / KG5CA
StratoCasters
 

Hi, nothing new out there really, ther was an improvement of the fw made a couple of month ago, I posted an updated fw here in November:?/g/HABalloon/message/123

/Mikael
[email protected]
 

Dave,

Can you please point to the repository for the information (schematic, board layout, firmware) on the ICT tracker?? I found a previous post in which Eduard attached a zip file with also this info, but that was 1.5 years ago, and I figure there must have been some updates since then.? Quite a nice job that he as done, looking forward to building one also.
--
Chuck / KG5CA
StratoCasters
 

开云体育

Also available in a lot of 10 ...


On 30/03/2020 6:29 am, Roberto Pietrafesa wrote:

Hallo Ken, good afternoon.
This is the link:
click on? [36 Inch]? box.
Hope it helps.

73 de IZ7VHF Roberto

Il giorno dom 29 mar 2020 alle ore 19:19 Ken Daniel via Groups.Io <kenndaniel=[email protected]> ha scritto:
Does anyone have a link to the correct balloons on Alliexpress?

Thanks
Ken

 

Hallo Ken, good afternoon.
This is the link:
click on? [36 Inch]? box.
Hope it helps.

73 de IZ7VHF Roberto


Il giorno dom 29 mar 2020 alle ore 19:19 Ken Daniel via Groups.Io <kenndaniel=[email protected]> ha scritto:
Does anyone have a link to the correct balloons on Alliexpress?

Thanks
Ken

 

Does anyone have a link to the correct balloons on Alliexpress?

Thanks
Ken
Big Dave
 

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 the part in place. The other handy tool is a toothpick with some beeswax on the tip. Its great for holding tiny parts. You also need very fine solder and a very sharp pointed soldering tip.
I now use a converted toaster oven with a controller I built with a kit from Sparkfun (several years ago..it has a serial connector). You always have to do some touch up but it generally works well. I'd like to see that K1FM board converted to parts on one side and no 402. I'm not sure how well my oven would work on upside down boards.
Oh..and a ginormous magnifying visor
Good luck 73 Jim VE3PRO

20200131_181204 _1_.jpg
20200131_181151 _2_.jpg
20200201_123618 _1_.jpg
20200201_123923 _1_.jpg

 

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

John
K5MO

On 1/31/2020 1:58 PM, B C wrote:
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 explosive.? hi hi.. I have 3 un assembled stella boards here waiting for parts and when I look at the size of those pads I just sigh...
Brian K9WIS
-----------------------------------------
From: "Big Dave"
To: [email protected]
Cc:
Sent: Thursday January 30 2020 8:56:35AM
Subject: Re: [HABalloon] ICT WSPR Tracker BOM?
Big Dave
 

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 me a lot of time.
 

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 0402

Capacitors
C1 4.7uF 0603
C2 1uF 0603
C3 100nF 0402
C4 1uF 0603
C5 DNP 0402
C6 100nF 0402
C7 100nF 0402

Oscillators
Q1 27MHz TCXO TXETBLSANF-27.000000
RES 4MHz Resonator with included loading caps ECS-SR1-4.00-B-TR
Note: I used a different Murata Resonator but now it is no longer available.

Actives
GPS Ublox Max M8C
MCU Atmega 328P
Transmitter Si5351A
High side switch MIC94092
Reset monitor MIC2775


On Sat, Feb 1, 2020 at 12:07 AM Big Dave <rockfordtractor@...> wrote:
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..

Big Dave
 

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 explosive.? hi hi.. I have 3 un assembled stella boards here waiting for parts and when I look at the size of those pads I just sigh...

Brian K9WIS

-----------------------------------------

From: "Big Dave"
To: [email protected]
Cc:
Sent: Thursday January 30 2020 8:56:35AM
Subject: Re: [HABalloon] ICT WSPR Tracker BOM?
Big Dave
 

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

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 !


On Tue, Jan 14, 2020 at 9:25 AM JanV <jan.vadilijev@...> wrote:
Any suggestions for Solar cells?


On Tue, Jan 14, 2020 at 8:10 AM <yo9ict@...> wrote:
My flights used:

TCXO :?
UBLOX MAX-M8C
RESONATOR IS NOT CRITICAL, as long as it fits the PCB footprint

 

开云体育

W dniu 14-01-2020 o?03:32, Big Dave pisze:
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 
-- 
SQ9GOL  Peter
Greetings from Poland
website: 
'73
 

39x19 from?

or 39x22 from:
 

Any suggestions for Solar cells?


On Tue, Jan 14, 2020 at 8:10 AM <yo9ict@...> wrote:
My flights used:

TCXO :?
UBLOX MAX-M8C
RESONATOR IS NOT CRITICAL, as long as it fits the PCB footprint

 

My flights used:

TCXO :?
UBLOX MAX-M8C
RESONATOR IS NOT CRITICAL, as long as it fits the PCB footprint

1 - 20 of 26