Hello everyone,
I recently got one of those Chinese 170 watt pallet amps for the mrf9180.The SMD
Caps and resistors don’t have any markings on them,does anybody know which strip contains which passive value?

Ps.somehow the Vendor has given me 2 mrf9180’s !!

he gives you two because they will fly one by one ,take care,anyway take a ddm and measure the value so it will be a resistor .good luck

It’s the caps that aren’t labelled sorry I realised the codes on the resistors

Bton-FM wrote: ↑Fri Mar 13, 2020 7:22 pm Ps.somehow the Vendor has given me 2 mrf9180’s !!

Are they Original or Fakes

BriansBrain wrote: ↑Sat Mar 14, 2020 3:28 pm

Bton-FM wrote: ↑Fri Mar 13, 2020 7:22 pm Ps.somehow the Vendor has given me 2 mrf9180’s !!

Are they Original or Fakes

dunno how to tell mate.Just realised one is an mrf186 and one is an mrf9180.

If those pallets are all the same as one another, this guy put up a circuit diagram:
https://www.ebay.com/itm/DIY-kits-170w- ... 2005922830
https://i.ebayimg.com/images/g/b~QAAOSw ... -l1600.jpg
Hope that is useful...

The problem I have is that I don't know what values of the smd capacitors because there are no markings on them.

SMD ceramic capacitors never have marks on them, unfortunately.
You will have to use a capacitance meter to sort them out.

Just buy a Capacitor meter, they are cheap on eBay and when I built a few of these I found I needed one to make sure I was fitting the correct values because many of the caps weren't marked with their values.

is one of the tenner Chinese ones ok for this?

Well it was for me

...might have been more like 11 or 12 quid back then though as it was around 2016/2017

Will a 24v 8.4 amp power supply be sufficient for the mrf9180?. What power supplies are you lot using for these pallet amps?

I'd go for at least a 10 amp supply for that device...

Do you think it will be alright for mrf186?

Yes

Bton-FM wrote: ↑Wed Mar 25, 2020 8:15 pm Will a 24v 8.4 amp power supply be sufficient for the mrf9180?. What power supplies are you lot using for these pallet amps?

I use the cheap Chinese 24V 10A power supplies.

Running @ 26V at 8A 16 hours a day - every day - no problem
The extra fans are because in Gran Canaria it often gets up to 35C°

Do you get them on eBay?

Bton-FM wrote: ↑Thu Mar 26, 2020 1:42 pm Do you get them on eBay?

I get all my stuff from ebay

The 24V 10A 240W power supplies you pic up for about 16 Euros Inc Post

Chinese Power Supplies

11 quid here: https://www.ebay.co.uk/itm//323418070567

teckniqs wrote: ↑Thu Mar 26, 2020 2:37 pm 11 quid here: https://www.ebay.co.uk/itm//323418070567

For me that would be 12.08 EUR + 21.70 EUR post = Total of 33.78 Euros

+ Then I would have to pay import TAX because UK in not in the union now
I will stick with stuff from China