[BC] Re: Saving Your Own Life

[cldube]

Our FM-20B has no such thing. Was this common of earlier versions?
Exciter, IPA & control board are all 220. Anything lower comes from a PS 
(i.e. fans).
Once you kill the three phases, it's cold.

Chuck Dube
WFCR
Amherst


----- Original Message ----- 
From: "Milton R. Holladay Jr." <miltron at mindspring.com>
To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
Sent: Thursday, October 20, 2005 9:56 PM
Subject: Re: [BC] Re: Saving Your Own Life


> One of the most hazardous, stupid xmtrs that most of us have encountered 
> is
> the FM-20 and its smaller brothers which have not only the 3 phase 
> circuit,
> but a separate 120 volt circuit, waiting to bite you. Any that I have had 
> my
> hands in now have the 120V tied to one of the 120V legs of the 3 phase, so
> that when it's off, it's ALL OFF !
> M
> ----- Original Message ----- 
> From: "Phil Alexander" <dynotherm at earthlink.net>
> To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
> Sent: Wednesday, October 19, 2005 10:20 AM
> Subject: Re: [BC] Re: Saving Your Own Life
>
>
>> On 18 Oct 2005 at 18:02, Kevin/Tieline Technology wrote:
>>
>> > Imagine my surprise after about 3 years of working on this TX that I
>> > find a THIRD breaker box hidden deep inside and down toward the ground
>> > inside a RACK of all things!!!
>> >
>> > I discovered this after I bought an inductor pen that lights up 
>> > whenever
>> > it's near AC without having to come into contact with AC.  I had been
>> > waving it around the TX and down in front at the base of the TX it
>> > lights up bright red even though I had the front open, breakers were 
>> > off
>> > and ground stick was used to check that nothing was live.  The pen had
>> > found the live AC still going to the low voltage power supply!  Well
>> > duh!  And I thought I had thought of everything.
>> >
>> > I *trusted* the previous engineer who showed me around the TX plant.  I
>> > wonder if HE knew about the 3rd breaker.
>> >
>> > As Cowboy said "Trust, but verify."
>
>
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