250 W 2.4 GHz MOSFET...

[Jan Panteltje]

250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with 4 of these?

 

[Simon S Aysdie]

On Saturday, June 15, 2019 at 1:05:41 PM UTC-7, Jan Panteltje wrote:

250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with 4 of these?

$67 -- $ before number.

 

[Jan Panteltje]

On a sunny day (Tue, 18 Jun 2019 09:39:04 -0700 (PDT)) it happened Simon S
Aysdie <gwhite@ti.com> wrote in
<2556a4bc-4004-4320-9c64-0c28db2a24df@googlegroups.com>:

On Saturday, June 15, 2019 at 1:05:41 PM UTC-7, Jan Panteltje wrote:
250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with 4 of these?

$67 -- $ before number.

67$00 ;-)

 

[Simon S Aysdie]

On Tuesday, June 18, 2019 at 10:07:37 AM UTC-7, Jan Panteltje wrote:

On a sunny day (Tue, 18 Jun 2019 09:39:04 -0700 (PDT)) it happened Simon S
Aysdie <gwhite@ti.com> wrote in
2556a4bc-4004-4320-9c64-0c28db2a24df@googlegroups.com>:

On Saturday, June 15, 2019 at 1:05:41 PM UTC-7, Jan Panteltje wrote:
250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with 4 of these?

$67 -- $ before number.

67$00 ;-)

lolz

 

[Gerhard Hoffmann]

Am 15.06.19 um 22:05 schrieb Jan Panteltje:

250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with 4 of these?

Ah, those are pre-matched.

I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:

<
https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-ND/2022876
>

But for ham radio, the price still seems somewhat excessive.
Nevertheless, I have bought a sample of the 10W version to see how it
works. Really I'd prefer a double PP transistor because most of the
source RF currents would not have to leave the chip.

I have also found a nice MMIC for the receiver input:
<
https://www.digikey.de/product-detail/de/skyworks-solutions-inc/SKY67150-396LF/863-1559-1-ND/4844025
>

and an SAW-filter for the 432 MHz band. Siemens/EPCOS/TDK/Whatever_today
B3710.

Seems to work (sorry, sunday morning home etched, not so pretty):
<
https://www.flickr.com/photos/137684711@N07/48088857111/in/album-72157662535945536/
>

2 Wire-wrap-wire vias under the thermal center pad of a 2*2 mm chip
is somewhat hairy. You find yourself flattening the ground under the
chip with 2000 sandpaper because of these thick 0.3 mm wires.
But nothing to tune.


and gain/loss:
<
https://www.flickr.com/photos/137684711@N07/48088857626/in/album-72157662535945536/
>

Noise factor measurement has to wait 2 weeks.

regards,
Gerhard DK4XP

 

[Clifford Heath]

On 19/6/19 8:41 am, Gerhard Hoffmann wrote:

Am 15.06.19 um 22:05 schrieb Jan Panteltje:
250 W 2.4 GHz MOSFET...
https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.
Ah, those are pre-matched.

I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:
https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-ND/2022876

Why would you want a 2.4GHz transistor for 432MHz? There are plenty of
cheaper options, MRF6V2150NR1 for example (and push-pull like you
wanted). The data sheet even has a schematic and layout.

Clifford Heath.

 

[Jan Panteltje]

On a sunny day (Wed, 19 Jun 2019 00:41:24 +0200) it happened Gerhard Hoffmann
<dk4xp@arcor.de> wrote in <qebpak$932$1@solani.org>:

Am 15.06.19 um 22:05 schrieb Jan Panteltje:
250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with 4 of these?



Ah, those are pre-matched.

Yes

I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:


https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-ND/2022876

Very expensive!

Motorcycles, yes, I had 2, very long time ago a Sparta, and later a Matchless bought in an auction from the army.
IIRC that one was 350 cc.
I stopped driving motorcycle when I almost flew off the road in a turn where there was some sand on the road.

Just yesterday I was reading that in the future you no longer need a special motorcycle driving license but a normal license will do in Germany?

But for ham radio, the price still seems somewhat excessive.
Nevertheless, I have bought a sample of the 10W version to see how it
works. Really I'd prefer a double PP transistor because most of the
source RF currents would not have to leave the chip.

I have also found a nice MMIC for the receiver input:

https://www.digikey.de/product-detail/de/skyworks-solutions-inc/SKY67150-396LF/863-1559-1-ND/4844025

Nice low noise, impressive!

and an SAW-filter for the 432 MHz band. Siemens/EPCOS/TDK/Whatever_today
B3710.

Seems to work (sorry, sunday morning home etched, not so pretty):

https://www.flickr.com/photos/137684711@N07/48088857111/in/album-72157662535945536/


2 Wire-wrap-wire vias under the thermal center pad of a 2*2 mm chip
is somewhat hairy. You find yourself flattening the ground under the
chip with 2000 sandpaper because of these thick 0.3 mm wires.
But nothing to tune.

I have some TB0299A 400 MHz SAW filters from ebay, cost about 5 USD, have not used those yet...
The plan was to mix up to 400 MHz, then filter with these, then mix again to whatever.
SAW filters are cool.

You find those very small SAW filters also in Wifi boosters for 2.4 GHz,

and gain/loss:

https://www.flickr.com/photos/137684711@N07/48088857626/in/album-72157662535945536/


Noise factor measurement has to wait 2 weeks.

Looks OK.

 

Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> wrote in
news:qeikm0$vva$1@dont-email.me:

On a sunny day (Wed, 19 Jun 2019 00:41:24 +0200) it happened
Gerhard Hoffmann <dk4xp@arcor.de> wrote in
qebpak$932$1@solani.org>:

Am 15.06.19 um 22:05 schrieb Jan Panteltje:
250 W 2.4 GHz MOSFET...

https://www.ampleon.com/products/rf-energy/2.45-ghz-
transistors
/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to
oscar100... It is actualy quite linear up to 250 W.

Seems designed for microwave ovens,

Threshold typical 1.75 V
18 dB gain...

Interesting thing.

67 $ from digikey
Do I see this right and can one make a 24 V microwave oven with
4 of these?



Ah, those are pre-matched.

Yes


I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:


https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-
ND/202
2876


Very expensive!

Motorcycles, yes, I had 2, very long time ago a Sparta, and later
a Matchless bought in an auction from the army. IIRC that one was
350 cc. I stopped driving motorcycle when I almost flew off the
road in a turn where there was some sand on the road.

Just yesterday I was reading that in the future you no longer need
a special motorcycle driving license but a normal license will do
in Germany?


But for ham radio, the price still seems somewhat excessive.
Nevertheless, I have bought a sample of the 10W version to see how
it works. Really I'd prefer a double PP transistor because most of
the source RF currents would not have to leave the chip.

I have also found a nice MMIC for the receiver input:

https://www.digikey.de/product-detail/de/skyworks-solutions-
inc/SKY
67150-396LF/863-1559-1-ND/4844025


Nice low noise, impressive!


and an SAW-filter for the 432 MHz band.
Siemens/EPCOS/TDK/Whatever_today B3710.

Seems to work (sorry, sunday morning home etched, not so pretty):

https://www.flickr.com/photos/137684711@N07/48088857111/in/album-
72
157662535945536/


2 Wire-wrap-wire vias under the thermal center pad of a 2*2 mm
chip is somewhat hairy. You find yourself flattening the ground
under the chip with 2000 sandpaper because of these thick 0.3 mm
wires. But nothing to tune.

I have some TB0299A 400 MHz SAW filters from ebay, cost about 5
USD, have not used those yet... The plan was to mix up to 400 MHz,
then filter with these, then mix again to whatever. SAW filters
are cool.

You find those very small SAW filters also in Wifi boosters for
2.4 GHz,



and gain/loss:

https://www.flickr.com/photos/137684711@N07/48088857626/in/album-
72
157662535945536/


Noise factor measurement has to wait 2 weeks.

Looks OK.

Here is a NXP 1.5kW unit but only good up to 600MHz.

https://www.ampleon.com/products/broadcast/0-500-mhz-rf-power-
transistors/BLF188XR.html

Oh well... Nice power transistor package though.

I drew the package in 3-D Cad. Every little radiused edge.

SOT539A

<http://www.mediafire.com/file/0aaad2ez323o93p/SOT539A_Device_Model.
pdf/file>

 

LINK:

http://www.w1ghz.org/small_proj/Simple_Broadband_Power_Amplifiers.pdf

Steve

 

Google "Simple Broadband Amplifiers" by W1GHZ

The BLF2043F and others of its ilk do what he says it does, I've built one of his designs.

I'm mentioning this because you will need a driver for the big one, and the resistive feedback is interesting for Ham use.


Steve

 

[Gerhard Hoffmann]

Am 19.06.19 um 03:07 schrieb Clifford Heath:

On 19/6/19 8:41 am, Gerhard Hoffmann wrote:
Am 15.06.19 um 22:05 schrieb Jan Panteltje:
250 W 2.4 GHz MOSFET...
https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.
Ah, those are pre-matched.

I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:
https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-ND/2022876

Why would you want a 2.4GHz transistor for 432MHz? There are plenty of
cheaper options, MRF6V2150NR1 for example (and push-pull like you
wanted). The data sheet even has a schematic and layout.

Well, those GaN parts don't come slower and their higher operating
temperature would be a plus in my small, heat sink limited design for
portable use. And they are kinda sexy.

But I've just ordered a MRF6V2150NR1, even if it's not for new designs
and not push pull (it only looks that way). I had hoped to find one or
two of these Mitsubishi hybrid PAs on HAMRadio 2019, but there was not
much interesting.

Thanks! Gerhard

 

[Steve Wilson]

Gerhard Hoffmann <dk4xp@arcor.de> wrote:

Am 19.06.19 um 03:07 schrieb Clifford Heath:
On 19/6/19 8:41 am, Gerhard Hoffmann wrote:
Am 15.06.19 um 22:05 schrieb Jan Panteltje:
250 W 2.4 GHz MOSFET...
https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC242
5M9LS250.html Some ham posted he is playing with it to get 250 W up
to oscar100... It is actualy quite linear up to 250 W.
Ah, those are pre-matched.

I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:
https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-ND/202287
6

Why would you want a 2.4GHz transistor for 432MHz? There are plenty of
cheaper options, MRF6V2150NR1 for example (and push-pull like you
wanted). The data sheet even has a schematic and layout.

Well, those GaN parts don't come slower and their higher operating
temperature would be a plus in my small, heat sink limited design for
portable use. And they are kinda sexy.

But I've just ordered a MRF6V2150NR1, even if it's not for new designs
and not push pull (it only looks that way). I had hoped to find one or
two of these Mitsubishi hybrid PAs on HAMRadio 2019, but there was not
much interesting.

Thanks! Gerhard

OT: Question: mentioning portable use, do you have any updates on your
motorcycle-portable EME station? I would love to hear more. For example,
what is the antenna gain and at what frequency?

Thanks.

Steve, Ex - VE3CKS, VE2BLB, F7CD, VE3CWF

 

[Gerhard Hoffmann]

Am 03.07.19 um 05:26 schrieb Steve Wilson:

OT: Question: mentioning portable use, do you have any updates on your
motorcycle-portable EME station? I would love to hear more. For example,
what is the antenna gain and at what frequency?

Thanks.

Steve, Ex - VE3CKS, VE2BLB, F7CD, VE3CWF

A friend of mine, DL7APV, has built a huge 432 MHz array.
Therefore, my side would be easy: 100W & 10 el yagi should
be enough for 2 way CW, and much less for JST65.
But if it's not CW, it is not considered "real" EME among many.

Since I like southern France and plan to do some motorcycle trips
there in the next time, it would be a good opportunity to collect
some squares and maybe dwarf countries. But everything must fit into
the 2 alu boxes of the bike plus DSLR + lenses, and tent... on the back
seat.
The rig will be DELL XPS13, Red Pitaya + homebrew transverter.

The weekend 3 weeks ago I built the preamp with SKY67150 & SAW
preselector filter. Sorry, home-etched. The wire vias under the
2*2 mm Sky chip with exposed GND center pad were somewhat difficult.

<
https://www.flickr.com/photos/137684711@N07/48088857111/in/dateposted-public/
>

S21 is on the picture to the right.


That antenna is insane:
< http://dl7apv.darc.de/ >

73, Gerhard, DK4XP

 

[Steve Wilson]

Gerhard Hoffmann <dk4xp@arcor.de> wrote:

Am 03.07.19 um 05:26 schrieb Steve Wilson:

OT: Question: mentioning portable use, do you have any updates on your
motorcycle-portable EME station? I would love to hear more. For
example, what is the antenna gain and at what frequency?

Thanks.

Steve, Ex - VE3CKS, VE2BLB, F7CD, VE3CWF

A friend of mine, DL7APV, has built a huge 432 MHz array.
Therefore, my side would be easy: 100W & 10 el yagi should
be enough for 2 way CW, and much less for JST65.
But if it's not CW, it is not considered "real" EME among many.

Since I like southern France and plan to do some motorcycle trips
there in the next time, it would be a good opportunity to collect
some squares and maybe dwarf countries. But everything must fit into
the 2 alu boxes of the bike plus DSLR + lenses, and tent... on the back
seat.
The rig will be DELL XPS13, Red Pitaya + homebrew transverter.

The weekend 3 weeks ago I built the preamp with SKY67150 & SAW
preselector filter. Sorry, home-etched. The wire vias under the
2*2 mm Sky chip with exposed GND center pad were somewhat difficult.

https://www.flickr.com/photos/137684711@N07/48088857111/in/dateposted-pub
lic/

S21 is on the picture to the right.

That antenna is insane:
http://dl7apv.darc.de/

73, Gerhard, DK4XP

Amazing! Thanks

Steve

 

[Clifford Heath]

On 3/7/19 12:37 pm, Gerhard Hoffmann wrote:

...MRF6V2150NR1, even if it's not for new designs
and not push pull (it only looks that way).

My apologies, I've spent too much time looking at the push-pull LDMOS.

Clifford Heath

 

[Jan Panteltje]

On a sunny day (Wed, 3 Jul 2019 04:37:29 +0200) it happened Gerhard Hoffmann
<dk4xp@arcor.de> wrote in <qfh4d9$a7m$1@solani.org>:

Am 19.06.19 um 03:07 schrieb Clifford Heath:
On 19/6/19 8:41 am, Gerhard Hoffmann wrote:
Am 15.06.19 um 22:05 schrieb Jan Panteltje:
250 W 2.4 GHz MOSFET...
https://www.ampleon.com/products/rf-energy/2.45-ghz-transistors/BLC2425M9LS250.html
Some ham posted he is playing with it to get 250 W up to oscar100...
It is actualy quite linear up to 250 W.
Ah, those are pre-matched.

I'm tempted to use these here for 120 W at 432 MHz for a
motorcycle-portable EME experiment powered by 10 Li cells:
https://www.digikey.de/product-detail/de/CGH40120F/CGH40120F-ND/2022876

Why would you want a 2.4GHz transistor for 432MHz? There are plenty of
cheaper options, MRF6V2150NR1 for example (and push-pull like you
wanted). The data sheet even has a schematic and layout.

Well, those GaN parts don't come slower and their higher operating
temperature would be a plus in my small, heat sink limited design for
portable use. And they are kinda sexy.

But I've just ordered a MRF6V2150NR1, even if it's not for new designs
and not push pull (it only looks that way). I had hoped to find one or
two of these Mitsubishi hybrid PAs on HAMRadio 2019, but there was not
much interesting.

Thanks! Gerhard

I just did read this:
https://forum.batc.org.uk/viewtopic.php?f=101&t=6186&sid=fd41d47c2a6588a3c1582e8f270d7893
that board seems simple enough, bit of dremel work.

That MRF24300 goes for 98 USD on ebay:
https://www.ebay.com/itm/133067502180
Not sure those are not Chinese rebranded.

A _bit_ more elsewhere, about 900 USD:
https://eu.mouser.com/ProductDetail/NXP-Freescale/MRF24300-1STG?qs=gTYE2QTfZfRacFK%2FPAxzGg%3D%3D

 

On Wednesday, July 3, 2019 at 12:04:10 AM UTC-4, Gerhard Hoffmann wrote:

The weekend 3 weeks ago I built the preamp with SKY67150 & SAW
preselector filter. Sorry, home-etched. The wire vias under the
2*2 mm Sky chip with exposed GND center pad were somewhat difficult.


https://www.flickr.com/photos/137684711@N07/48088857111/in/dateposted-public/

This gentleman makes solid copper thermal vias by swaging in a
piece of tinned copper bus wire as a rivet. It's fast, and
clever.
wire
________ _ /_ _______ Cu
######## \\// #######
######## | | ####### <~~~ FR4

https://paulwanamaker.wordpress.com/300-2/

Cheers,
James Arthur