More than I expected

[Jan Panteltje]

Ordered some 1W amp from ebay. 400 MHz t o270 MHz..
https://www.ebay.com/itm/192933443964

Arrived today:
http://panteltje.com/pub/1W_PA_400_to_2700MHz_sideview_IXIMG_0050.JPG

Some heatsink for 1W!!!


PCB looks neat, almost like the ones JOLA makes
http://panteltje.com/pub/1W_PA_400_to_2700MHz_PCB_view_IXIMG_0051.JPG

Interesting, 400 MHz should also work on 70 cm ham band..

And I have spare RF2126 chips..
Not tested yet...

But HAD to know why the big heatsink for 1W????
http://panteltje.com/pub/1W_PA_400_to_2700MHz_without_heatsink_IXIMG_0052.JPG

right, no thermal contact with the chip, is a dent the PCB layer...
Chip mounted above hole in PCB...
sigh

Will need some rework...
hehe

 

[Jeff Liebermann]

On Sat, 13 Jul 2019 16:22:05 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

>Will need some rework...

I had the same problem with a 1 watt driver ceramic case device. I
needed some additional heat sinking for the ceramic case device. So,
I just drilled a hole in the PCB, inserted a brass rivet, filled it
with solder, and flattened it in an arbor press. A bit of silicon
grease on both sides of the rivet and it carried enough heat to the
aluminum chassis to make it work.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[John Larkin]

On Sat, 13 Jul 2019 16:22:05 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

Ordered some 1W amp from ebay. 400 MHz t o270 MHz..
https://www.ebay.com/itm/192933443964

Arrived today:
http://panteltje.com/pub/1W_PA_400_to_2700MHz_sideview_IXIMG_0050.JPG

Some heatsink for 1W!!!


PCB looks neat, almost like the ones JOLA makes
http://panteltje.com/pub/1W_PA_400_to_2700MHz_PCB_view_IXIMG_0051.JPG

Interesting, 400 MHz should also work on 70 cm ham band..

And I have spare RF2126 chips..
Not tested yet...

But HAD to know why the big heatsink for 1W????
http://panteltje.com/pub/1W_PA_400_to_2700MHz_without_heatsink_IXIMG_0052.JPG

right, no thermal contact with the chip, is a dent the PCB layer...
Chip mounted above hole in PCB...
sigh

Will need some rework...
hehe

That amp is generic on ebay and Amazon. Lots of people sell them and
specs are all over the place.

We're using these in a test fixture

https://www.amazon.com/gp/product/B07CVF6XBF/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

and it works OK, but it really won't make 3.2 watts out.

I wanted to buy a boxed amp from RM Italy, but they seem to have some
legal problem selling their wideband units in the USA. I've ordered a
look-alike

https://www.amazon.com/gp/product/B07TWPXGPY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This is to test our IQ modulator/eddy-current sensor simulator in
production. We need a few watts into 50 ohms at around 15 MHz.


--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Jan Panteltje]

On a sunny day (Sat, 13 Jul 2019 11:29:22 -0700) it happened John Larkin
<jjlarkin@highlandtechnology.com> wrote in
<808kie918ofshb36ck97fa008k49lahks9@4ax.com>:

On Sat, 13 Jul 2019 16:22:05 GMT, Jan Panteltje
pNaOnStPeAlMtje@yahoo.com> wrote:

Ordered some 1W amp from ebay. 400 MHz t o270 MHz..
https://www.ebay.com/itm/192933443964

Arrived today:
http://panteltje.com/pub/1W_PA_400_to_2700MHz_sideview_IXIMG_0050.JPG

Some heatsink for 1W!!!


PCB looks neat, almost like the ones JOLA makes
http://panteltje.com/pub/1W_PA_400_to_2700MHz_PCB_view_IXIMG_0051.JPG

Interesting, 400 MHz should also work on 70 cm ham band..

And I have spare RF2126 chips..
Not tested yet...

But HAD to know why the big heatsink for 1W????
http://panteltje.com/pub/1W_PA_400_to_2700MHz_without_heatsink_IXIMG_0052.JPG

right, no thermal contact with the chip, is a dent the PCB layer...
Chip mounted above hole in PCB...
sigh

Will need some rework...
hehe

That amp is generic on ebay and Amazon. Lots of people sell them and
specs are all over the place.

We're using these in a test fixture

https://www.amazon.com/gp/product/B07CVF6XBF/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

and it works OK, but it really won't make 3.2 watts out.

Yes, but mine will run at 2.4 GHz 1 W out as driver for my 75 Watt Spectrian ATV sat uplink:
http://panteltje.com/pub/spectrian_2.4-GHz_linear_top_view_IMG_4576.JPG
or stand-alone SSB sat uplink if it works....

I wanted to buy a boxed amp from RM Italy, but they seem to have some
legal problem selling their wideband units in the USA. I've ordered a
look-alike

https://www.amazon.com/gp/product/B07TWPXGPY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Well I have a Ranger RCI-2970 150W PEP transceiver for those frequencies...
Digital tuning. AM, FM, SSB..
Makes a great signal generator I suppose... 100 Hz tuning steps.
Used it on CB too, worked large parts of the whole world with it.
Do not remember what I payed for it, guy came to my house to deliver it,
he had modified it for greater frequency range including CB.

This is to test our IQ modulator/eddy-current sensor simulator in
production. We need a few watts into 50 ohms at around 15 MHz.

Not sure I can tune mine that low, not below 27 MHz.
There are a lot of linears on the market, yes Italy seems to be on the air a lot with
horrible huge amounts of power
That was probably illegal, so he cannot ship, or even use it.
Some run kW.