New MRF9180 draws 8A @ 26V but only puts out 20W

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rigmo
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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Tue Apr 21, 2020 3:58 pm

RF Friends Unfortunately there are many false transistors from China but there are some who are paid to say this is not good. I researched and made sure that under the different markings was the original thing.
Personally, I've been buying fake (different labels) for two years now and they work perfectly. You do not need to believe everything that is posted on the internet .. we need trusted store... only this is important...
p.s.
sorry to everyone who bought real fake.
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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by BriansBrain » Thu Apr 23, 2020 1:26 pm

Well... From my experience :smoke

The picture they use to advertise the product they are selling does not mean that it is what you will receive.

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Re: RE: Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by Electronically » Thu Apr 23, 2020 1:32 pm

rigmo wrote:RF Friends Unfortunately there are many false transistors from China but there are some who are paid to say this is not good. I researched and made sure that under the different markings was the original thing.
Personally, I've been buying fake (different labels) for two years now and they work perfectly. You do not need to believe everything that is posted on the internet .. we need trusted store... only this is important...
p.s.
sorry to everyone who bought real fake.
There isn't alot of reviews so to me it tells a story. If you get reviews with loads of folk commenting on them then you'll be sure what to buy and not to buy.

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Fri Jun 26, 2020 10:49 pm

https://www.aliexpress.com/item/32816018892.html
I get 200W easy (short II test on 220W 15minute but heating go fast obove 48.. i stoped....) 26V my calculation get 80% efficiency... if I run only 175W 25V 8.1A run over 4h temeprature do not cross 36°C

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Sun Jul 05, 2020 1:08 pm


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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Tue Oct 13, 2020 5:03 pm

soon
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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by BriansBrain » Tue Oct 13, 2020 6:07 pm

rigmo wrote:
Tue Oct 13, 2020 5:03 pm
soon
Interesting :smoke
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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by Electronically » Wed Oct 14, 2020 3:04 pm

Why don't you put a solid jumper across each screw of the mrf9180 on both ends then screw down but make sure your heatsink is apply a little compound directly underneath then tighten down.

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by BriansBrain » Fri Oct 16, 2020 11:49 am

Electronically wrote:
Wed Oct 14, 2020 3:04 pm
Why don't you put a solid jumper across each screw of the mrf9180 on both ends then screw down but make sure your heatsink is apply a little compound directly underneath then tighten down.
Is that suggestion aimed at me :?:

If it is there is always plenty of heatsink compound under my FETs :tup
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Re: RE: Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by Electronically » Fri Oct 16, 2020 11:58 am

BriansBrain wrote:
Electronically wrote:
Wed Oct 14, 2020 3:04 pm
Why don't you put a solid jumper across each screw of the mrf9180 on both ends then screw down but make sure your heatsink is apply a little compound directly underneath then tighten down.
Is that suggestion aimed at me :?:

If it is there is always plenty of heatsink compound under my FETs :tup
No Brian. Just anyone who is thinking of this board. Have you still used the same chip after all those months I know we, spoke about this months back about it. But just curious to the point now Brian.

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Re: RE: Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by BriansBrain » Sat Oct 17, 2020 2:31 pm

Electronically wrote:
Fri Oct 16, 2020 11:58 am
No Brian. Just anyone who is thinking of this board. Have you still used the same chip after all those months I know we, spoke about this months back about it. But just curious to the point now Brian.
As you can see from the picture of Brian's 150W Linear there is a date of 30-11-19 on it :o
Brian's 150W Linear 26V @ 8A-S.jpg
This is the date the MRF9180 was replaced for a genuine one, he has been running at 26V @ 8A for 16hrs a day ever since :tup

In 25 days time that will = 1 year 8-)

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Re: RE: Re: RE: Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by Electronically » Sat Oct 17, 2020 2:44 pm

BriansBrain wrote:
Electronically wrote:
Fri Oct 16, 2020 11:58 am
No Brian. Just anyone who is thinking of this board. Have you still used the same chip after all those months I know we, spoke about this months back about it. But just curious to the point now Brian.
As you can see from the picture of Brian's 150W Linear there is a date of 30-11-19 on it :o
Brian's 150W Linear 26V @ 8A-S.jpg
This is the date the MRF9180 was replaced for a genuine one, he has been running at 26V @ 8A for 16hrs a day ever since :tup

In 25 days time that will = 1 year 8-)

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Remarkable for 16 hours a day you've done the amp proud Brian for a whole year

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Sat Oct 17, 2020 5:56 pm

BriansBrain wrote:
Fri Oct 16, 2020 11:49 am
Electronically wrote:
Wed Oct 14, 2020 3:04 pm
Why don't you put a solid jumper across each screw of the mrf9180 on both ends then screw down but make sure your heatsink is apply a little compound directly underneath then tighten down.
Is that suggestion aimed at me :?:

If it is there is always plenty of heatsink compound under my FETs :tup
tnx
tru...
only we need extra gnd pads if heatsink coated... clean aluminium or copper do not need this pads...

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Sun Oct 18, 2020 12:06 pm

some small changes.. soon be in production... universal mosfet board up to 500+
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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Wed Oct 21, 2020 3:55 pm

MRF9180 is apsolute leader for investment... cheep and nice output... its very sensitive but if have nice protection can run forever... efficiency is above of 80% drive under 500mW out is 180-190W cold run... under 43°C

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by Bton-FM » Wed Oct 21, 2020 4:11 pm

rigmo wrote:
Wed Oct 21, 2020 3:55 pm
MRF9180 is apsolute leader for investment... cheep and nice output... its very sensitive but if have nice protection can run forever... efficiency is above of 80% drive under 500mW out is 180-190W cold run... under 43°C
Is the output clean when you are doing 180 watts output for 500mw input?

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Re: New MRF9180 draws 8A @ 26V but only puts out 20W

Post by rigmo » Thu Oct 22, 2020 5:51 am

Yes sure I drive With clean driver and both have tuned LPF.... last one driver is https://www.ebay.com/itm/FM-BROADCAST-P ... 4274543164?
specially he can not generate harmonics with 100mA drive !

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