From: on Sun, Jan 1 2006 7:24 am


K0HB wrote:
wrote

Len would probably recognize it.

Len does homebrew QRO?

Don't know.

Nope. No QRO and no HRO or DRO or PLO.

I've used commercial wideband high-power VHF amplifiers for
testing in professional work. Smaller than shown in the
photo.

But the 3cx10,000a7? Hardly amateurish. Probably more in the domain
of professionals.

Sounds rather ILLEGAL to me if "used on 80m" as claimed by
the seller.

Not something that HRO or even Henry Radio would feature in
catalogs ("call or write for details and prices"). Pro stuff,
probably intended for something rather different than pure
communications.

From the looks of the exhaust vent in the E-bay photo, I'd say
that it should be about a 10-gallon RF output thing, quite out
of the amateur legal limits. Besides, it doesn't have enough
knobbies on it to "qualify" for an amateur radio transmitter
on "the bands" (HF).

wrote:
From: on Sun, Jan 1 2006 7:24 am


K0HB wrote:
wrote

Len would probably recognize it.
Len does homebrew QRO?
Don't know.

Nope. No QRO and no HRO or DRO or PLO.

I've used commercial wideband high-power VHF amplifiers for
testing in professional work. Smaller than shown in the
photo.

What does it matter what you've used professionally that you didn't
build, Len?

But the 3cx10,000a7? Hardly amateurish. Probably more in the domain
of professionals.

Sounds rather ILLEGAL to me if "used on 80m" as claimed by
the seller.

What would be illegal about using such an amp on 80m?

Not something that HRO or even Henry Radio would feature in
catalogs ("call or write for details and prices"). Pro stuff,
probably intended for something rather different than pure
communications.

From the looks of the exhaust vent in the E-bay photo, I'd say
that it should be about a 10-gallon RF output thing, quite out
of the amateur legal limits.

That doesn't mean that it is run above the legal amateur power limits.
It only means that it could be.

Besides, it doesn't have enough
knobbies on it to "qualify" for an amateur radio transmitter
on "the bands" (HF).

A linear amplifier isn't a transmitter, Len. It amplifies the output of
a tranmitter or tranceiver. :-) :-)


Dave K8MN

wrote:
From: on Sun, Jan 1 2006 7:24 am


K0HB wrote:
wrote

Len would probably recognize it.

Len does homebrew QRO?

Don't know.

Nope. No QRO and no HRO or DRO or PLO.

I've used commercial wideband high-power VHF amplifiers for
testing in professional work. Smaller than shown in the
photo.

But the 3cx10,000a7? Hardly amateurish. Probably more in the domain
of professionals.

Sounds rather ILLEGAL to me if "used on 80m" as claimed by
the seller.

Not something that HRO or even Henry Radio would feature in
catalogs ("call or write for details and prices"). Pro stuff,
probably intended for something rather different than pure
communications.

From the looks of the exhaust vent in the E-bay photo, I'd say
that it should be about a 10-gallon RF output thing, quite out
of the amateur legal limits. Besides, it doesn't have enough
knobbies on it to "qualify" for an amateur radio transmitter
on "the bands" (HF).

Sweetums you clueless old fart, check out the ACOM 2000A "amateur" HF
2kW+ amp, not a "knobbie" in sight.

Get a life.

wrote


Sounds rather ILLEGAL to me if "used on 80m" as claimed by
the seller.


Nothing illegal, so long as it's used within the rules. I have a couple of
different amplifiers which could easily be driven beyond 1500W out, but are
perfectly legal so long as the power output rule is observed.

73, de Hans, K0HB

From: K0HB on Jan 2, 1:04 pm


wrote

on high-power linear RF amplifier


Sounds rather ILLEGAL to me if "used on 80m" as claimed by
the seller.

Nothing illegal, so long as it's used within the rules.

That's the crux of the whole thing, isn't it?

"Legality." :-)


I have a couple of
different amplifiers which could easily be driven beyond 1500W out, but are
perfectly legal so long as the power output rule is observed.

...and just who checks your "legal status" in operating?

Oh, my, there's LOTS of different "technical" regulations
in Part 97, Title 47 C.F.R., aren't there?

The same can be said of Citizens Band Radio Service. It was
"okay" once and legal to have a linear amplifier connected to
a CB transmitter provided one did not exceed the regulatory
limits found in Part 95, Title 47 C.F.R. Uh huh... :-)

A company called General Radiotelephone once operated in
Burbank, CA, on Magnolia Blvd a few blocks from Hollywood
Way. They had - once - a cramped, busy assembly line
operation going on the second floor of one building on
the north side of Magnolia Blvd. Their major product was
a CB transceiver which was ready to increase its power
output from 5 to 35 Watts (by removing a jumper) "if and
when the FCC allows a power output change." It SOLD in
quantity with that "feature." The company planned to
expand in the near future and had put up most of a triangle
tower for their CB antenna...tower still visible half-
erected on the roof today. Of course the FCC never did
increase CB power output. The offshore import CB rigs
arrived to undercut their prices and they went Chapter
something and quit the business. [no, I didn't have one
of those General Radiotelephone rigs, but they were in
my vicinity and I was up on their second floor factory]

Now and for some years there has been a legal no-no on
even being able to PURCHASE a linear amplifier in a certain
frequency range...which could be used for a CB radio...or a
10m amateur radio. Can you connect the dots and see a trend
for the future there?

If someone has a 10 KW linear that covers all of "the bands"
(HF) then it is tempting both faith and human nature to say
that a legally-licensed (certificated, tested, got their
legal license in the nave of the Church of St.Hiram) amateur
will ALWAYS OBEY THE RULES. The temptation is GREAT...just
sitting there, ready to go, beside the operating position
in the "shack."

Of course YOU will always be scrupulously honest. [was
there any doubt?] Are all the other legal amateurs just
as scrupulously honest?

Be honest now...

wrote


...and just who checks your "legal status" in operating?


Me and Mr. Bird Type 43



Now and for some years there has been a legal no-no on
even being able to PURCHASE a linear amplifier in a certain
frequency range...which could be used for a CB radio...or a
10m amateur radio. Can you connect the dots and see a trend
for the future there?


A single dot does not constitute a trend.

And the "legal no-no" (§97.315, §97.317) does not apply to homebrewed
amplifiers, which the item in question appears to be. Amateur-to-amateur sales
are also exempt.

Sunuvagun!

73, de Hans, K0HB
--
Lord High Liberator of the Electric Smoke

"KØHB" wrote in message
k.net...

wrote


...and just who checks your "legal status" in operating?


Me and Mr. Bird Type 43



Now and for some years there has been a legal no-no on
even being able to PURCHASE a linear amplifier in a certain
frequency range...which could be used for a CB radio...or a
10m amateur radio. Can you connect the dots and see a trend
for the future there?


A single dot does not constitute a trend.

And the "legal no-no" (§97.315, §97.317) does not apply to homebrewed
amplifiers, which the item in question appears to be. Amateur-to-amateur
sales are also exempt.

Sunuvagun!

73, de Hans, K0HB
--
Lord High Liberator of the Electric Smoke


Didn't the FCC change that in the last year or two? Since it didn't
successfully keep the amplifiers off the CB band anyway, I believe they
dropped that restriction.

Since I have to head off to work shortly, I don't have time to look it up
now but I do remember reading something on that.

Dee D. Flint, N8UZE

"Dee Flint" wrote in message
news

And the "legal no-no" (§97.315, §97.317) does not apply to homebrewed
amplifiers, which the item in question appears to be. Amateur-to-amateur
sales are also exempt.

Sunuvagun!

73, de Hans, K0HB
--
Lord High Liberator of the Electric Smoke


Didn't the FCC change that in the last year or two? Since it didn't
successfully keep the amplifiers off the CB band anyway, I believe they
dropped that restriction.


§97.315 and §97.317 remain in effect.

73, de Hans, K0HB
--
Lord High Liberator of the Electric Smoke

"KØHB" wrote in message
news

"Dee Flint" wrote in message
news

And the "legal no-no" (§97.315, §97.317) does not apply to homebrewed
amplifiers, which the item in question appears to be.
Amateur-to-amateur sales are also exempt.

Sunuvagun!

73, de Hans, K0HB
--
Lord High Liberator of the Electric Smoke


Didn't the FCC change that in the last year or two? Since it didn't
successfully keep the amplifiers off the CB band anyway, I believe they
dropped that restriction.


§97.315 and §97.317 remain in effect.

73, de Hans, K0HB
--
Lord High Liberator of the Electric Smoke


Well it looks like that item (WT Docket 04-140) is still in limbo. Part of
it does include changing the amplifier rules but it hasn't been implemented.

Dee D. Flint, N8UZE