[Icom] re pa output trans in Icom transceivers

Tue, 17 Sep 2002 11:32:43 -0700

Hi Fern,

The PA transistors in the IC-756 are a matched pair of 2SC2694's. The
drivers are a matched pair of 2SC1972's, and the pre-driver is a 2SC1971.

In the IC-746, there are separate PA's for HF/6m and 2m. Each PA uses a
matched pair of 2SC2694's. The drivers are matched pairs of 2SC1972's, and
the pre-drivers are 2SC1971's (separate HF/6m and 2m chains).

Replacement devices are available form Icom or from RF Parts
http://www.rfparts.com/

I would not recommend that you attempt replacement unless you have access to
a service manual, the requisite test equipment as specified in the service
manual, and appropriate soldering/desoldering equipment.

Best 73,
Adam, VA7OJ/AB4OJ
North Vancouver, BC, Canada
http://www.qsl.net/ab4oj/
Note new e-mail address:
mailto:[email protected]

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Fern Rivard
Sent: Tuesday, September 17, 2002 08:40
To: [email protected]
Subject: [Icom] re pa output trans in Icom transceivers

Could someone please advise me as to what pa output transistors are used in
the IC-746 and the IC-756 transceivers and also wonder if Icom uses a
matched pair or no?  Best of 73's from Fern