[Collins] Interesting snippet on today's Collins - MiniCircuits Labs

[Carl]

Those devices then amplify everything from DC to daylight and in an old 
single conversion 455kc radio that means lots of images.

Ive built a few for scope and counter preamps and even to pep up a vintage 
141T spectrum analyzer.

DEMI used a MAR in their 6M transverter as a post mixer amp. While the IM 
specs look good on paper they fall apart with a real world band opening or 
contest; I wound up removing and bypassing it and feeding a bullet proof 
2N5109 with a 1.5dB NF at 28 mHz and throttled back to 10dB of gain after 
the BPF.

Carl
KM1H


----- Original Message ----- 
From: "Greg Mijal" <bluebirdtele at embarqmail.com>
To: <geraldj at weather.net>; <collins at mailman.qth.net>
Sent: Tuesday, April 27, 2010 10:25 PM
Subject: Re: [Collins] Interesting snippet on today's Collins - MiniCircuits 
Labs


> If you like Mini-Circuits lab stuff, you will love their MAR line.
> It's a monoblock (4 legged) rf amplifier that needs only an adjustable 5
> volt supply an input and output cap.  Power line RFC and bypass cap.  The
> circuit will give you 20 db gain at a NF of 3 db or less depending on 
> which
> model MAR you select.  I built one for a Drake TR 4 some years ago and the
> little board made the TR 4 receiver hotter than the hubs of hell.  It's a
> natural to perk up the old BA stuff that is sagging on 15 and 10 meters.
> The WWW has alot of information on this device and a couple of practical
> examples.  Power for the board is take from the filament line, rectified,
> filter and throttle down to give 0 - 5 vdc.  Anything beyond around 5 v 
> will
> kill the device.  Another thing is an external power pot is necessary to
> control the gain (power supply V control) to prevent noise from overtaking
> the signal.
> But boy does it work!  The devices are cheap and plentiful.  You can buy
> them at Ebay too.
> Have fun!
> Greg
> WA7LYO
> Kinston NC
> ----- Original Message ----- 
> From: "Dr. Gerald N. Johnson" <geraldj at weather.net>
> To: <collins at mailman.qth.net>
> Sent: Tuesday, April 27, 2010 7:39 PM
> Subject: Re: [Collins] Interesting snippet on today's Collins
>
>
>> Mini-Circuits sells state of the art mixers, amplifiers, filters,
>> switches, and attenuators at low prices. That makes them very popular.
>> They sell to hams pretty good too.
>>
>> 73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association
>>
>> On 4/27/2010 1:04 PM, Adam Farson wrote:
>>> Rockwell Collins names Mini-Circuits as top supplier for 2010
>>>
>>> Full release: http://www.rockwellcollins.com/news/page12411.html
>>>
>>> Cheers for now, 73,
>>> Adam VA7OJ/AB4OJ
>>>
>>>
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