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Re: [Discuss-gnuradio] power amplifiers on TX
From: |
Kevin McQuiggin |
Subject: |
Re: [Discuss-gnuradio] power amplifiers on TX |
Date: |
Wed, 30 Dec 2015 16:26:42 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 |
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
> http://corganlabs.com
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
- [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 <=
- 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, 2015/12/30
- Re: [Discuss-gnuradio] power amplifiers on TX, Markus Heller, 2015/12/31
- Re: [Discuss-gnuradio] power amplifiers on TX, Marcus Müller, 2015/12/31