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Old August 27th 08, 03:43 AM posted to rec.antiques.radio+phono,rec.radio.amateur.homebrew
Syl Syl is offline
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First recorded activity by RadioBanter: Aug 2008
Posts: 4
Default WTB : LPAM Part 15 Transmitter BCB

Peter Wieck a écrit :
On Aug 26, 6:10 pm, Syl wrote:
Peter Wieck a écrit :



For the money, and if you can get to Kutztown, I will have a
consignment of SSTRAN AMT3000 units. $80, including all taxes and with
the SMT chip already installed.

Peter,

That transmitter is NOT FCC part 15 compliant for what I know.

This would be misleading as the OP requests a part 15 transmitter
BCB.

Syls


From the website:



· Legal to use in the US, no FCC license required

· Fully compliant with FCC Part 15 regulations

· 100 mW input power

· 100% Modulation

· 20Hz to 20kHz ±1 dB Audio Response

· Very Low Distortion

· Adjustable Audio Compressor/Limiter

· 10 kHz and 9 kHz channel spacing options

· High Quality PC Board and Components

· Comprehensive Instruction Manual

This is a "HOME MADE" unit - which means that it must meet maximum
power radiation requirements, antenna developed length requirements
and various other regulations. EXACTLY the same as the Ramsey kit, the
AES kit, the L'il 7 Kit and any of several others.

What it is NOT is approved to be sold as a full-built unit.

Makes it Part 15 - compliant.

But, by removing the spaces, you can get chapter-and-verse from Phil
Bolyn at info at sstran dot com.

Peter Wieck
Melrose Park, PA


Hi Peter,

Thanks. Several of those specs do bring questions though as they aren't
properly defined (unless they are in the full FCC documentation ?

i.e.

a) Just what "very low distortion" means ? To me, very low distortion
would be 0,001% as a minimum. But I understand that in the real world
of transmitters, 0,1% is probably considered very low distortion figures
? This based on the presumption that attaining 0,001% distortion figures
is easier to attain than using tube technology. Correct me if I am wrong.

b) Adjustable compressor/limiter. To what levels ?

c) High Quality PC Board and Components. Does this means the
homebrewer can't use Chinese made parts [grin]

Of course I do not mean to start a discussion on these points,
merely thinking out loud...;o)

But...I now better understand the requirements for part 15. As It shows,
the only difference between a commercial unit and a homebrewer's is the
latter does not have to pay labs testing and approval for his
"concoction" whereas the former (the manufacturer) has to have the FCC
seal of approval and the of course the onerous fee(s) along with the
approval tag.

I wonder how the FCC manages the homebrewer's "concoctions", other
than reacting to complaint(s) ? I suspect this is what happened
to the kit builder whom got fined sometime ago ?

Syl