Mrf9180 kit passives value identification

Bton-FM · Post by **Bton-FM** » Fri Mar 13, 2020 7:22 pm

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 !!

radium98 · Post by **radium98** » Sat Mar 14, 2020 7:56 am

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

Bton-FM · Post by **Bton-FM** » Sat Mar 14, 2020 10:05 am

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

BriansBrain · Post by **BriansBrain** » 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

Bton-FM · Post by **Bton-FM** » Sat Mar 14, 2020 3:57 pm

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.

yellowbeard · Post by **yellowbeard** » Sat Mar 14, 2020 4:32 pm

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...

Bton-FM · Post by **Bton-FM** » Sat Mar 14, 2020 4:51 pm

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

Krakatoa · Post by **Krakatoa** » Sat Mar 14, 2020 5:23 pm

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

teckniqs · Post by **teckniqs** » Sat Mar 14, 2020 8:10 pm

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.

Bton-FM · Post by **Bton-FM** » Sat Mar 14, 2020 10:05 pm

is one of the tenner Chinese ones ok for this?

teckniqs · Post by **teckniqs** » Sat Mar 14, 2020 11:03 pm

Well it was for me

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

Bton-FM · Post by **Bton-FM** » 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?

teckniqs · Post by **teckniqs** » Wed Mar 25, 2020 9:33 pm

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

Bton-FM · Post by **Bton-FM** » Wed Mar 25, 2020 9:57 pm

Do you think it will be alright for mrf186?

teckniqs · Post by **teckniqs** » Wed Mar 25, 2020 10:00 pm

BriansBrain · Post by **BriansBrain** » Thu Mar 26, 2020 1:14 pm

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

Llinear amplifier ready to put together-S.jpg

Llinear amplifier Rear-S.jpg

150W Linear 26V @ 8A-S.jpg

RF Rack-S.jpg

The extra fans are because in Gran Canaria it often gets up to 35C°

Bton-FM · Post by **Bton-FM** » Thu Mar 26, 2020 1:42 pm

Do you get them on eBay?

BriansBrain · Post by **BriansBrain** » Thu Mar 26, 2020 2:11 pm

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

Switching power supplies.jpg

teckniqs · Post by **teckniqs** » Thu Mar 26, 2020 2:37 pm

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

BriansBrain · Post by **BriansBrain** » Thu Mar 26, 2020 3:20 pm

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

24V @ 10A from greatshopsaving on ebay.jpg

24V @ 10A from greatshopsaving on ebay - Cost.jpg

I will stick with stuff from China

Mrf9180 kit passives value identification

Mrf9180 kit passives value identification

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