Motorola MRF 422

[Greg Beat]

Martin -

The Motorola MRF-422 is a very popular HF bipolar transistor
Rated for 1.5 - 30 MHz for HF/SSB usage

http://www.rfparts.com/transistorspecs.html
Specifications:

Voltage:  28 volts
RF (out):  150 watts
RF (in)  :     15 watts
G(pe) : min 10 db at 30 MHz

Package / Case style: 211-11
http://www.rfparts.com/trancase.html

The MRF 422 is available as Hi Beta and Low Beta - as well as matched pairs
http://www.rfparts.com/mototran.html

$ 36.00 each for a MA/COM part
$ 54.95 for a Hi Beta

The SD 1726 is similar, BUT is higher gain -- requiring only 6 watts input
http://www.rfparts.com/product.html

Advanced Semiconductor (ASI) does have cross reference information
ASI part number HF220-28 - ASI order code: ASI10609
http://www.advancedsemiconductor.com/pdf/hf220_28.pdf

Advanced Semiconductor, Inc.
7525 Ethel Ave.
North Hollywood, CA  91605

Toll Free: (800) 423 - 2354
California: (818) 982 - 1200
FAX: (818) 765 - 3004
E-mail: sales at advancedsemiconductor.com

RadioDan / Henry Radio also used the MRF 422 in their solid-state amplifiers
(SS1200HF)
http://www.radiodan.com/Henry/Amp_specs/sshf_spec.htm

Communications Concepts uses this transistor in their EB27A - another
classic Helge Granberg design
http://www.communication-concepts.com/eb27a.htm

IF you are replacing this transistor in a commercial transceiver or
amplifier -
NOTE its color dot (e.g. blue, red, orange, yellow or green)

G. Beat
w9gb


----- Original Message -----
From: "Martin Tippin" <w0akg at AEROSURF.NET>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Friday, July 25, 2003 3:46 PM
Subject: MRF 422


Is there a cross ref. for the MRF422 Transistors?
Martin L Tippin  WØAKG
140 Monarch Lane
Branson, MO 65616

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