2312-QPL9547EVB-01-ND‎ QPL9547EVB-01‎ EVB FOR0.1-6 GHZ ULTRA LOW-NOISE Development Board from DigiKey

[andrew....@googlemail.com]

I would like to thank Adrian for bringing to my attention the 2312-QPL9547EVB-01-ND‎ QPL9547EVB-01‎ EVB FOR0.1-6 GHZ ULTRA LOW-NOISE available from DigiKey for $125. The company will post worldwide. There is a long lead time though of 25 weeks.

 

The board utilizes the Qorvo MMIC QPL9547, which is the same chip used in the Kraken LNA feeds. No wonder everyone thinks that the Kraken HI feed is so superior to just utilizing the Sawbird HI LNA. So here you get the Kraken front end low noise amp with the opportunity to drop in whatever filter for a bandpass after it that you want and not just the Kraken HI feed HI filter that comes with it.

 

It's an evaluation board on stock from DigiKey for a Qorvo QPL9547 0.1 ~ 6 GHz Ultra Low-Noise Amplifier MMIC that at least on the spec sheets sounds super unbelievable  with only   0.17 dB noise figure @ 1.4 GHz and with ~ 19 dB of gain.

Adrian has set up a Bitly short link for anyone who is interested         https://bit.ly/4viKq5E

 

This amp would be used as the front end antenna to input for your filter (e.g. cavity filter) and then almost any other reasonable amplifier, anything with say 1-2 dB noise figure and another ~ 20 dB or so of gain at 1.4GHz at the output to the cavity filter,  should equal or possibly better a Sawbird LNA system.

 

Andy

 

[Stephen Arbogast]

I   would   like   to point   out  this is  an evaluation  board  not  an Engineering  prototype..  play  and  learn from  it.

On 4/7/26 11:29 PM, andrew.thornett via Society of Amateur Radio Astronomers wrote:

> I would like to thank Adrian for bringing to my attention the 2312- > QPL9547EVB-01-ND‎ QPL9547EVB-01‎ EVB FOR0.1-6 GHZ ULTRA LOW-NOISE > available from DigiKey for $125. The company will post worldwide. > There is a long lead time though of 25 weeks. > > > > The board utilizes the Qorvo MMIC QPL9547, which is the same chip > used in the Kraken LNA feeds. No wonder everyone thinks that the > Kraken HI feed is so superior to just utilizing the Sawbird HI LNA. > So here you get the Kraken front end low noise amp with the > opportunity to drop in whatever filter for a bandpass after it that > you want and not just the Kraken HI feed HI filter that comes with > it. > > > > It's an evaluation board on stock from DigiKey for a Qorvo QPL9547 > 0.1 ~ 6 GHz Ultra Low-Noise Amplifier MMIC that at least on the spec > sheets sounds super unbelievable with only 0.17 dB noise figure @ > 1.4 GHz and with ~ 19 dB of gain. > > Adrian has set up a Bitly short link for anyone who is > interested https://bit.ly/4viKq5E > > > > This amp would be used as the front end antenna to input for your > filter (e.g. cavity filter) and then almost any other reasonable > amplifier, anything with say 1-2 dB noise figure and another ~ 20 dB > or so of gain at 1.4GHz at the output to the cavity filter, should > equal or possibly better a Sawbird LNA system. > > > > Andy > > > > -- -- You received this message because you are subscribed to the > Google Groups "Society of Amateur Radio Astronomers" group. To post > to this group, send email to sara...@googlegroups.com To > unsubscribe from this group, send email to sara-list- > unsub...@googlegroups.com For more options, visit this group at > http://groups.google.com/group/sara-list?hl=en --- You received this > message because you are subscribed to the Google Groups "Society of > Amateur Radio Astronomers" group. To unsubscribe from this group and > stop receiving emails from it, send an email to sara- > list+uns...@googlegroups.com. To view this discussion visit > https://groups.google.com/d/msgid/sara- > list/005f01dcc718%24a2052160%24e60f6420%24%40googlemail.com <https:// > groups.google.com/d/msgid/sara- > list/005f01dcc718%24a2052160%24e60f6420%24%40googlemail.com? > utm_medium=email&utm_source=footer>.om  it

[Stephen Arbogast]

Andy,

The dev  board is available   from  DigiKey   but  a  warning  it is  a 
dev board  for playing    and  development   not  for production.

[fasleitung3]

We have been using such a type of development board with a TQP3M9036 or
TQP3M9037 chip as low noise amplifier at our 3-m dish for a number of
years now. These were made by TriQuint which later was taken over by
Qorvo. The board design is exactly the same, only now they have a more
advanced and better amplifier chip. See
https://astropeiler.de/wp-content/uploads/2020/01/Hydrogen_2.pdf

The 25 weeks lead time would be for larger Quantities, but Digikey has
31 in stock right now. Certainly worthwhile trying.

Best regards,
Wolfgang




Am Mittwoch, den 08.04.2026, 00:34 -0600 schrieb 'Stephen Arbogast' via
Society of Amateur Radio Astronomers:

> --

[Andrew Thornett]

What's the practical difference?

Andy

Sent from Outlook for Android

---

From: 'Stephen Arbogast' via Society of Amateur Radio Astronomers <sara...@googlegroups.com>
Sent: Wednesday, April 8, 2026 7:24:24 AM
To: sara...@googlegroups.com <sara...@googlegroups.com>
Subject: Re: [SARA] 2312-QPL9547EVB-01-ND QPL9547EVB-01 EVB FOR0.1-6 GHZ ULTRA LOW-NOISE Development Board from DigiKey

 

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[Stephen Arbogast]

Generally speaking, in my  experience,  a manufacturer  will make available a  development  board of  their  chip or  chip set for  prospective  buyers  to  try out   and  determine if  the chip is right  for  them .  If the  potential  buyers find it meets requirements   then  they will  have  several engineering prototype boards made to test  and verify a design.  If  all goes  well then production boards are ordered.

Dev boards  are great  especially if  they work  for what we need  to do  as hobbyists!

[Stephen Arbogast]

Here is an  example, in theory, of when I should have tried the  dev board  first  before  buying  the product.  Several  years  ago  I  bought a cheap   wide band   rf  pre-amp   advertised as  100 Mhz to 1  Ghz.  Here  are  some  plots  of  S11  and S21   from  my  NANOVNA-F....   I  have found it not  very useful.

[Stephen Arbogast]

Here is  a very  cool  example of  how   Phil  started  with an   eval STM32 board    then   made his  own Extended Kalman Filter Software Implementation.....

https://www.youtube.com/watch?v=7HVPjkWOrLE&t=4s