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Author Topic: FCC Invites Comments on Petition to Eliminate 15 dB Gain  (Read 40442 times)
W5JON
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Posts: 373




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« on: April 28, 2016, 11:13:48 AM »

SB QST @ ARL $ARLB015
ARLB015 FCC Invites Comments on Petition to Eliminate 15 dB Gain
Limit on Amateur Amplifiers

ZCZC AG15
QST de W1AW 
ARRL Bulletin 15  ARLB015
From ARRL Headquarters 
Newington CT  April 28, 2016
To all radio amateurs

SB QST ARL ARLB015
ARLB015 FCC Invites Comments on Petition to Eliminate 15 dB Gain
Limit on Amateur Amplifiers

The FCC has put on public notice and invited comments on a Petition
for Rule Making (RM-11767), filed on behalf of an amateur amplifier
distributor, which seeks to revise the Amateur Service rules
regarding maximum permissible amplifier gain. Expert Linears America
LLC of Magnolia, Texas, which distributes linears manufactured by
SPE in Italy, wants the FCC to eliminate the 15 dB gain limitation
on amateur amplifiers, spelled out in Part 97.317(a)(2). Expert
asserts that there should be no gain limitation at all on amplifiers
sold or used in the Amateur Service.

RM-11767 can be found on the web at,
http://apps.fcc.gov/ecfs/comment/view?id=60001536394 .

"There is no technical or regulatory reason [that] an amplifier
capable of being driven to full legal output by even a fraction of a
watt should not be available to Amateur Radio operators in the
United States," Expert said in its Petition.

Expert maintains that the 15 dB gain limitation is an unneeded
holdover from the days when amplifiers were less efficient and the
FCC was attempting to rein in the use of Amateur Service amplifiers
by Citizens Band operators. While the FCC proposed in its 2004
Notice of Proposed Rulemaking and Order in WT Docket 04-140 to
delete the requirement that amplifiers be designed to use a minimum
of 50 W of drive power and subsequently did so, it did not further
discuss the 15 dB amplification limit in the subsequent Report and
Order in the docket.

The R&O is in PDF format at,
https://apps.fcc.gov/edocs_public/attachmatch/FCC-06-149A1.pdf
.

"Although no party advocated retention of the 15 dB limit, it
remains in place today," Expert pointed out in its filing. "In the
intervening years, advancements in Amateur Radio transmitter
technology have led to the availability of highly compact,
sophisticated low-power transmitters that require more than 15 dB of
amplification to achieve maximum legal power output. Therefore,
Expert seeks to remove the 15 dB limit from Part 97.317 so that
Amateur Radio manufacturers and distributors will not be forced to
needlessly cripple their amplifiers for sale in the United States."

Expert pointed to its Model 1.3K FA amplifier as an example of a
linear "inherently capable of considerably more than 15 dB of
amplification," which would make it a suitable match for low-power
transceivers now on the market having output power on the order of
10 W.
NNNN
/EX
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N9AOP
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Posts: 1173




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« Reply #1 on: April 28, 2016, 02:49:01 PM »

What do you suppose that this will do to the IMD?
Art
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ND6M
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Posts: 845




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« Reply #2 on: April 28, 2016, 03:04:23 PM »

If it ain't broke, don't "fix" it.
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G3RZP
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Posts: 1313




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« Reply #3 on: April 28, 2016, 03:13:05 PM »

I can't see that the proposal does any harm while the limit on out of band gain remains. No other country has this limitation - and I do not see why US amateurs should be limited  - unless anyone in the FCC can demonstrate that US amateurs are significantly less law abiding and knowledgeable on technical matters than the rest of the world.
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WA7PRC
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« Reply #4 on: April 28, 2016, 03:28:51 PM »

Quote
I can't see that the proposal does any harm while the limit on out of band gain remains. No other country has this limitation - and I do not see why US amateurs should be limited  - unless anyone in the FCC can demonstrate that US amateurs are significantly less law abiding and knowledgeable on technical matters than the rest of the world.
1. Because other countries do something is not in itself a reason for the US to do something.
2. It's not US hams that need to be watched. It's the US NON hams that need to be watched.
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W1QJ
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Posts: 2980




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« Reply #5 on: April 28, 2016, 03:33:19 PM »

This gain issue was purely an issue which came about because of the CB boom of years ago.  It is no longer needed.  All you have to do is go to YOUTUBE and see the videos about those who hawk selling huge CB type amps.  Some of the stuff is truly amazing.
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WA7PRC
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« Reply #6 on: April 28, 2016, 03:41:41 PM »

All you have to do is go to YOUTUBE and see the videos about those who hawk selling huge CB type amps.  Some of the stuff is truly amazing.
Some is comical.
Some is scary.
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G3RZP
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Posts: 1313




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« Reply #7 on: April 28, 2016, 03:43:37 PM »

Quote
It's the US NON hams that need to be watched.

But in reality, as a rule, it is about as much use as teats on a bull. Illegal CB is there.....and the FCC doesn't have the staff or the money to do a lot about it.
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WA7PRC
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« Reply #8 on: April 28, 2016, 05:06:16 PM »

Quote
It's the US NON hams that need to be watched.
But in reality, as a rule, it is about as much use as teats on a bull. Illegal CB is there.....and the FCC doesn't have the staff or the money to do a lot about it.
Since the FCC doesn't have the staff or money to do a lot about it, let's give up, and make it legal. That makes 'prefect' sense.


Not.
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KM4AH
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Posts: 961




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« Reply #9 on: April 28, 2016, 05:24:02 PM »

Apparently the only people who care about the CB band are hams, the senile ones in particular.
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WA7PRC
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« Reply #10 on: April 28, 2016, 05:26:44 PM »

Apparently, some don't have a valid argument, and resort to placing labels on those with whom they disagree.
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KM4AH
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Posts: 961




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« Reply #11 on: April 28, 2016, 05:39:56 PM »

Apparently, some don't have a valid argument, and resort to placing labels on those with whom they disagree.

Nonsense. It is just a matter of minding my own business. Which is a pretty valid argument.
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W8JX
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Posts: 13268




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« Reply #12 on: April 28, 2016, 06:20:40 PM »

They want to make it easier to make 20 kw amps with 100watts or less drive (about 23 db gain)
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--------------------------------------
Ham since 1969....  Old School 20wpm REAL Extra Class..
KM4AH
Member

Posts: 961




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« Reply #13 on: April 28, 2016, 07:33:30 PM »

They want to make it easier to make 20 kw amps with 100watts or less drive (about 23 db gain)


I have a friend who drove a 3cx10,000 with an L4B. Called it the atom smasher. Lot of guys drove a pair of 4-1000's with something like an SB220. Talk about a nasty signal. Seems to be less of that going on that it was 30 years ago for whatever reason.
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K6JH
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Posts: 521




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« Reply #14 on: April 29, 2016, 01:50:42 AM »

Oh come on, these days there are other technical ways to keep an amp from operating on 11m than limiting the gain.

Remember how some amps can't operate on 10m without showing your license in order to purchase the mod parts? Or how more modern amps will work on 10 without modification by using a counter to determine the frequency of operation?

I can't see what useful purpose the gain limitation rule fulfills, other than a 10db attenuator makes the input match look perfect.  Wink

73
Jim K6JH
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73
Jim K6JH
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