FS1000A 433 MHz SAW ASK transmitters

2m & 70cm discussion - antennas, propagation, operating, etc
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VK4GHZ
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FS1000A 433 MHz SAW ASK transmitters

Post by VK4GHZ » Tue Dec 18, 2018 11:58 am

The joys of cheap Chinese crap on EBAY!
Two separate packages arrived, both non-functional. }:[

One of them being some of these low-cost 433 MHz SAW transmitter and receiver pairs for a current project.
The receivers work as advertised.
item_listing.JPG
However, the FS1000A transmitter boards didn't have L2 fitted ex factory!
No DC volts to the transistor collector - couldn't possibly work.
20181217_1600.jpg
FS1000A schematic:
FS1000a-Problem.jpg

Albiet annoying having to do, a quick fix with some on-hand ECW.
20181218_1600.jpg
Ebay seller notified!
Given they sell cosmetics too, I'm sure their eyes glazed over when reading what I submitted. :lol:
contact.JPG
:popcorn:
Adam, Brisbane
http://vk4ghz.com | VK4GHZ on Youtube
Image Waiting for the perfect 2/70/23 multi-mode SDR transceiver

ZL2WHO
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Re: FS1000A 433 MHz SAW ASK transmitters

Post by ZL2WHO » Tue Dec 18, 2018 5:01 pm

Hi Adam.

Be interesting to see the reply if indeed you get one.
I had a xtal in a cct that stopped oscillating at a given temp. I was able to prove this to the supplier, in this instance they were the manufacturer so they sent me replacements.

Id be asking for a handful of free boards for you trouble.


73

Mark

VK2XTC
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Re: FS1000A 433 MHz SAW ASK transmitters

Post by VK2XTC » Wed Dec 19, 2018 5:18 pm

I've had this before from a Chinese Supplier.

I requested a refund from PayPal as it as not fit for purpose, not as advertised.

PayPal refunded my money straight away. No returns required. Just backed out the payment.

In my case I could fix the problem. So it really was a throw away.


Brian

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Re: FS1000A 433 MHz SAW ASK transmitters

Post by VK4AQF » Wed Dec 19, 2018 5:20 pm

Aliexpress is better than ebay. If you tell Ali it dont work they will refund you. They dont like bad suppliers. Trouble is theres China suppliers that range from -10 to +10 in quality.

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VK4GHZ
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Re: FS1000A 433 MHz SAW ASK transmitters

Post by VK4GHZ » Thu Dec 20, 2018 10:52 am

Update!

Got a refund of $3.

Original purchase price was $6.88 for the three transmitter and receiver pairs, so ended up costing $3.88, and the fix as quick and easy. :om:
Adam, Brisbane
http://vk4ghz.com | VK4GHZ on Youtube
Image Waiting for the perfect 2/70/23 multi-mode SDR transceiver

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