Re: N-GEN noise generator question

[BobConvers]

Thanks, guys.   Now I can get back to it.   BTW, what type of device is the
MAR-1?
73, Bob, WO3E

>>By the way it will work eithere way you mount it as long as the slanted
lead
>>is pointing toward C2.  The two leads on either side are connected to
>>ground.

>>73'Jim K4ZM
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft   
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[zeke7237]

I believe it's a MMIC amplifier .. basically gain-in-a-box good to 1Ghz

de W1RT/John


On Fri, 26 Nov 2004 12:18:33 EST, [hidden email] <[hidden email]> wrote:

> Thanks, guys.   Now I can get back to it.   BTW, what type of device is the
> MAR-1?
> 73, Bob, WO3E
>
> >>By the way it will work eithere way you mount it as long as the slanted
> lead
> >>is pointing toward C2.  The two leads on either side are connected to
> >>ground.
>
> >>73'Jim K4ZM
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft   
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Rick Commo]

The device is known as an "MMIC" or Monolithic Microwave Integrated Circuit.
It is essentially two transistors and the associated biasing resisters that
from medium to high gain with decent noise figure over a very wide frequency
range from low 10s of MHz up to 10Ghz in some cases.

They are made and biased in a such way that they present roughly 50 ohms as
input and output impedances.  Sometimes they are referred to as "gain
blocks" with the implication that with little more than input and output
coupling capacitors and a single bias resistor for the output side you have
a gain block that can be embedded in a 50 ohm system.  The truth is you need
a little more than just those 3 components, but nor much.

Cheers,
-rick, K7LOG



-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of [hidden email]
Sent: Friday, November 26, 2004 9:19 AM
To: [hidden email]
Subject: [Elecraft] Re: N-GEN noise generator question

Thanks, guys.   Now I can get back to it.   BTW, what type of device is the
MAR-1?
73, Bob, WO3E
.
.
.
.

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft   
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com