Return-Path: Delivered-To: craig@dapaero.com Received: from gator4254.hostgator.com by gator4254.hostgator.com with LMTP id wO/OJjMjYGQ5kAYAcizydQ (envelope-from ) for ; Sat, 13 May 2023 18:54:27 -0500 Return-path: Envelope-to: craig@dapaero.com Delivery-date: Sat, 13 May 2023 18:54:27 -0500 Received: from [69.59.86.204] (port=61028 helo=smtpclient.apple) by gator4254.hostgator.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pxz4F-001s6y-FK; Sat, 13 May 2023 18:54:27 -0500 Content-Type: multipart/alternative; boundary=Apple-Mail-0CEAD0E7-D5D3-4E3C-AAAD-5F49D3BAD84D Content-Transfer-Encoding: 7bit From: DAP AERO Mime-Version: 1.0 (1.0) Subject: Re: Motorola Interface Message-Id: <0788B47F-1B7E-4D56-829D-6E424EB74B0E@dapaero.com> References: <000a01d985f1$8eef4bc0$accde340$@flighttech.com> In-Reply-To: <000a01d985f1$8eef4bc0$accde340$@flighttech.com> To: jfisher@flighttech.com Date: Sat, 13 May 2023 16:54:16 -0700 X-Mailer: iPhone Mail (20E252) --Apple-Mail-0CEAD0E7-D5D3-4E3C-AAAD-5F49D3BAD84D Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable

Ohh= hhh

Well, in a speeder it i= sn=E2=80=99t like their hands are all that busy anyway.

In contrast, yesterday I flew a VFR transit= ion across SeaTac=E2=80=99s class bravo, and I could have used two more hand= s and six more eyes.

= Thanks again

Craig

On May 13, 2023, at 4:21 PM, jfi= sher@flighttech.com wrote:

=EF=BB=BF
The newer radios microphones have a cpu or other contro= l circuity making it impossible to interface to the intercom.
There for all transmission on the r= adio are done with the radio microphone.

Joe
&nb= sp;
From: DAP AERO= <craig@dapaero.com>
Sent: Saturday, May 13, 2023 6:16 PMTo: jfisher@flighttech.com
Subject: Re: Motorola Interfac= e

Thanks Joe,
So this taps into the speaker high/low pins on DB-15 on the radio fo= r the output. Is the headset microphone input directly connected or does tha= t need isolation/ impedance matching also? I haven=E2=80=99t found a pin out= for the Motorola, I presume there is a PTT input also.
=

Best regards

Craig

On May 13, 2023, at 4:04 PM, jfisher@flighttech.com wrote:
=
=EF=BB=BF
Hi Craig,

Here is the wiring and parts information for interfacing= the radio to the intercom.
&= nbsp;
The transformer can be o= rdered from Mouser Electronics, https://www.mouser= .com/ProductDetail/Xicon/42TM016-RC?qs=3DPLr%2FYlEJFP1bvBB4YtwOQg%3D%3D<= /span>

<= p class=3D"MsoNormal">Any questions, I=E2=80=99ll be happy to assist you.=

=
Good luck,

<= o:p>
Joe Fisher
DesignTech Systems, In= c
FlightTech Intercoms
www.flighttech.com
630-324-8199

=
<motorela interface.pdf>

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