[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] power amplifiers on TX
Re: [Discuss-gnuradio] power amplifiers on TX
Wed, 30 Dec 2015 17:06:22 -0800
Just to add onto what Ron has said, the limit in the US is 1500 watts, but
there are some restrictions per band, and license level. Details here [
http://www.arrl.org/frequency-allocations ] but below are the important
- "Unless otherwise noted, the maximum power output is 1500 watts PEP.
Novice/Technicians are limited to 200 watts PEP on HF bands."
60m - "Effective March 5, 2012, amateurs are permitted to use digital modes
that comply with emission designator 60H0J2B, which includes PSK31 as well as
any RTTY signal with a bandwidth of less than 60 Hz. They may also use modes
that comply with emission designator 2K80J2D, which includes any digital mode
with a bandwidth of 2.8 kHz or less whose technical characteristics have been
documented publicly, per Part 97.309(4) of the FCC Rules. Such modes would
include PACTOR I, II or III, 300-baud packet, MFSK16, MT63, Contestia, Olivia,
DominoEX and others. with a maximum effective radiated power (ERP) of 100 W.
Radiated power must not exceed the equivalent of 100 W PEP transmitter output
power into an antenna with a gain of 0 dBd."
30m - "Maximum power, 200 watts PEP. Amateurs must avoid interference to the
fixed service outside the US."
10m Novice / Technician - "Maximum power 200 watts PEP"
1.25m - 50w PEP , Novice / Technician 25w PEP
23cm - Novice - 5w max PEP
> On Dec 30, 2015, at 4:53 PM, Ron Economos <address@hidden> wrote:
> In Canada, you can use up to 2250 watts PEP output on SSB.
> In the US, it's 1500 watts PEP output in any mode.
> The Kuhne Electronic equipment is excellent stuff. It's essentially
> commercial equipment that's been re-purposed for the ham bands. In fact, as a
> licensed operator, you can purchase their industrial products. For example,
> I'm using this amplifier for 70cm digital television.
> However, due to the high PAPR of digital waveforms, it only delivers a few
> watts of average linear power.
> On 12/30/2015 04:26 PM, Kevin McQuiggin wrote:
>> The amateur limit is 1000 Watts. Personally I ran 800+ Watts on the 2
>> metre band in the late 1980s for my EME (moonbounce) station. All
>> analog, single long-boom Yagi. I used a 2M downconverter and listened
>> on my 10M receiver as it was way more sensitive than my 2M rig.
>> Over about a year's operation I heard about 10 stations via EME and
>> worked only 2. Still, that was a very good operational record for a
>> single Yagi station of the era.
>> Possibly relevant to Marcus' and others' warnings, my power amplifier
>> did EXPLODE on one occasion due to dried-out filter capacitors. Big
>> fireball, and little bits of paper blown right through the amplifier
>> case and all over the room. It was spectacular :=/
>> My wife tells the story very well: she was in the kitchen and heard this
>> big "BOOM". She called upstairs "Is everything alright?" and I calmly
>> replied "No problem. Could you bring the fire extinguisher up here please?"
>> Fortunately no fire, and I replaced the filter capacitors. The
>> amplifier was fine - a good bonus, as I had borrowed it from a research
>> lab at a local university for a couple of weeks.
>> With the new weak signal DSP techniques, I hear that 100 Watts and a
>> single Yagi will get you many contacts, although the data rate will be
>> very low. Still, it works and that is amazing!
>> I think Daniel was just asking if these German amplifiers are good
>> quality. I hear that they are, and that they work very well, although I
>> have never used or seen one in person. I hear they stand behind their
>> gear, and will also do custom designs.
>> Kevin (VE7ZD)
>> On 15-12-30 04:03 PM, Johnathan Corgan wrote:
>>> On Wed, Dec 30, 2015 at 3:14 PM, James Humphries
>>> <address@hidden <mailto:address@hidden>> wrote:
>>> I'm on Marcus' side with that output power, that's a scary high
>>> output. I start to sweat at 10W... :)
>>> Heh, I connected a USRP to a 20KW PA once. Sweating was only one of
>>> several things done in anticipation :)
>>> Johnathan Corgan
>>> Corgan Labs - SDR Training and Development Services
> Discuss-gnuradio mailing list
- [Discuss-gnuradio] power amplifiers on TX, Daniel Pocock, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Marcus Müller, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Daniel Pocock, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, James Humphries, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Johnathan Corgan, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Marcus D. Leech, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Kevin McQuiggin, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Markus Heller, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Ron Economos, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX,
Nate Temple <=
- Re: [Discuss-gnuradio] power amplifiers on TX, Markus Heller, 2015/12/31
- Re: [Discuss-gnuradio] power amplifiers on TX, Marcus Müller, 2015/12/31