Ultra Low Noise Transistor

fgentges at mindspring.com fgentges at mindspring.com
Sun Dec 2 13:15:00 CST 2012


Well, here is another from Triquint.  Thanks for the info.  In addition 
there is a line of preamps from MiniCircuits with similar performance. 
We seem to now have a smorgasbord of devices to choose from.  And our 
best cheers for the holidays this year across the pond.

Old timers recall the great care we crafted a 2 meter converter built 
with a 417A tube or a 416B if we were seeking that magic 3 dB noise 
figure.  With those tubes we had to carefully tune to the frequency of 
use.   Now we see broadband sub 1 dB noise figures in consumer equipment 
such as cell phones and GPS receivers.

Imagine, sub 1 dB noise figure transistors in a bag of 25 for less than 
$60.  Times have brought us ever better parts and toys.  I have a box of 
416B tubes in my basement that are best used to look at got reminiscent 
memories.  Wait, I will give them out to attendees to the Holiday party 
on December 14.

Frank K0BRA

On 12/2/2012 10:14 AM, Alberto di Bene wrote:
> On 12/2/2012 1:41 AM, fgentges at mindspring.com wrote:
>> /Today at tacos we were discussing a low noise transistor I found.  It
>> comes from RF Micro Devices (RFMD).
>> They make a whole line of these and I picked the SPF-5122Z.  You can
>> find lots of information at//
>> / /
>> /
>> ///https://estore.rfmd.com/RFMD_Onlinestore/Products/RFMD+Parts/PID-P_SPF-5122Z.aspx?DC=25//
>> /
> Have you seen this one? :
> http://www.triquint.com/products/p/TQP3M9036
>  From the NF point of view, it looks a bit better. It stops at 2GHz, not
> at 4 like yours, but that should not be a problem...
> 73  Alberto  I2PHD
> _______________________________________________
> Tacos mailing list
> Tacos at amrad.org
> https://amrad.org/mailman/listinfo/tacos

More information about the Tacos mailing list