Re: [amsat-bb] Help needed Cal Amp IF RF4Z device

["F6CWN" <f6cwn@xxxxxxxxxxxxxx>]

----- Original Message -----
From: "Dave" <nr1dx@arrl.net>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, July 06, 2002 7:22 PM
Subject: [amsat-bb] Help needed Cal Amp IF RF4Z device


> Earlier  today I posted looking for a schematic of a CalAmp 31732 so far
no
> useful responses.....
>
> I have pretty well isolated the problem to the IF output gain block . The
> device is marked "RF4Z" any idea on a cross reference or source for
> replacement ?
>
> Dave
> NR1DX
> nr1dx@arrl.net
>
> "A man who picks a cat up by the tail learns a lesson he can learn no
other
> way" .... Mark Twain


07./07/2002  2200z

 Hello Dave,

I do not found the exact component for your converter, but i can say to you,
that
in the DRAKE model 2880 they are the same transistor ( RF1Z or RF4Z), and in
this
case you can change it by a BFQ 17 (also a SOT89 case).
This is only a simple cascode amplifier without  mystery.
Anything normaly using in CATV distribution are OK (Ft of 3 to 4 GHz and Ic
around 150 mA).

Greetings: Jeff / F6CWN

AMSAT-France  #009






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