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Re: Accurately Monitoring TPO
To: CRTech <crtech@crtech.org>
Subject: Re: Accurately Monitoring TPO
From: Barry Mishkind <crtech@oldradio.com>
Date: Tue, 08 Aug 2017 12:49:06 -0700
In-reply-to: <CAJHfeBvBE-k66Z5v_4MhgRqkxXhk=w9aLGiLRefnpJYhcvxBqg@mail.g mail.com>
References: <CAP8KTHa0uGi6Sge2AmJr+dY-mO_rY2VNF4eM-G112exz96ERaw@mail.gmail.com> <FFCD126A-7B68-4D93-ABAE-66D14FF54261@earthlink.net> <CAP8KTHbYw_NE7_AXbjA+YJnp7s636oSDZCtoq7znutg0Gf_CTw@mail.gmail.com> <CAJHfeBvBE-k66Z5v_4MhgRqkxXhk=w9aLGiLRefnpJYhcvxBqg@mail.gmail.com>
At 12:33 PM 8/8/2017, BIll Moede wrote:
>PA voltage x PA current x Eff (transmitter efficiency as listed in the transmitter manual). You'll have to assume that your line/antenna is 50 ohms.

        There are two problems that many folks face.
        1. Many transmitters no longer show PA Voltage or current.
                This is especially true and a problem on AM, but
                is also an issue with many FM transmitters.

                If the TPO meter goes bad, identifying the
                actual TPO is very difficult in those cases. 

        2. If you have not spent a lot of time with a transmitter,
                logging "normal" parameters and knowing where
                the proper settings are to make the normal TPO
                there have been more than a few cases where
                the meters have been intentionally mis-calibrated
                by a prior tech to make an ad hoc increase in power.




Follow-Ups: New XP install won't play url files
(wpio-fm <wpio@gate.net>, 9 Aug 2017 13:29:13 -0000)
Re: Accurately Monitoring TPO
(Gary Liebisch <glieb01@gmail.com>, 17 Aug 2017 17:14:41 -0000)
References: Accurately Monitoring TPO
(Steve Tuzeneu <stuzeneu@gmail.com>, 8 Aug 2017 17:09:48 -0000)
Re: Accurately Monitoring TPO
(Tommy Gray <tommygray@earthlink.net>, 8 Aug 2017 17:17:11 -0000)
Re: Accurately Monitoring TPO
(Steve Tuzeneu <stuzeneu@gmail.com>, 8 Aug 2017 18:07:54 -0000)
Re: Accurately Monitoring TPO
(BIll Moede <bmoedereplay@gmail.com>, 8 Aug 2017 19:33:39 -0000)
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