[amsat-bb] Re: Landwehr 70cm preamp device question?

Mark L. Hammond marklhammond at gmail.com
Tue May 31 14:55:46 PDT 2011


Thank you very much for your advice and the data sheets.  I had compared the two data sheets and could not see why a substitution was a bad idea.  

I appreciate the other part numbers and source recommendation, too!


Mark N8MH 

At 09:49 PM 5/31/2011 +0200, i8cvs wrote:
>----- Original Message ----- 
>From: "Mark L. Hammond" <marklhammond at gmail.com>
>To: "Amsat - BBs" <amsat-bb at amsat.org>
>Sent: Tuesday, May 31, 2011 8:00 PM
>Subject: [amsat-bb] Landwehr 70cm preamp device question?
>> Hello All,
>> I have an old Landwehr preamp that apparently uses the MGF1402 device
>> (does that sound right?).  It's not working so I presume it's the
>> GaAsFET.
>> Can the MGF1302 be substituted for the original MGF1402?  Or can
>> anybody recommend another device for the 70 cm Landwehr?
>> I need to do something...
>> Thanks in advance!
>> -- 
>> Mark L. Hammond [N8MH]
>Hi Mark, N8MH
>The MGF 14......types are MIL versions (Hi-Rel) of the MGF 13..... and
>MGF 19..... and so "apparently" the MGF 1402 can be repleced by a
>MGF 1302 with minor current adjustement for the lowest Noise Figure
>By the way  the MGF 1402 can be directly replaced by a ATF 26550
>or MGF 1412 available at 9,30 Euro's from
>Look at the Catalog and then click over GaAsFET and FET 
>If you contact Franco Rota of the above rfmicrowave company I am
>sure that he has few MGF 1402 at stock 
>You can pay it with credit card and get the GaAsFET in a few days
>by regular post.
>73" de
>i8CVS Domenico

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