FS1000A 433 MHz SAW ASK transmitters

[VK4GHZ]

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.

However, the FS1000A transmitter boards didn't have L2 fitted ex factory!
No DC volts to the transistor collector - couldn't possibly work.

FS1000A schematic:

Albiet annoying having to do, a quick fix with some on-hand ECW.

Ebay seller notified!
Given they sell cosmetics too, I'm sure their eyes glazed over when reading what I submitted.

[ZL2WHO]

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]

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

[VK4AQF]

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.

[VK4GHZ]

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.