Guess I will watch the video after all ron k5hm.
On Aug 11, 2016 12:38, "Scott Royall via BVARC" <bvarc@bvarc.org> wrote: > Well Bill, you might know if you were there. I’ve been through four FD ops > powered by solid state generators, and the issues you list haven't been a > measurable factor. That’s not to say these things will never matter, but > experience tells me even eight 100-watt rigs going on one such generator > hasn't created these problems to a noticeable extent. I suspect you may > have forgotten how many other things seem to go out of their way to > compromise radio operations. > > > > Incidentally, I routinely operate my 600-watt station off my 3500-watt > generator to keep the generator in condition. No issues, but I don't wear > headphones either. > > > > *From:* BVARC [mailto:bvarc-boun...@bvarc.org] *On Behalf Of *Bill > Crowell, N4HPG via BVARC > *Sent:* Thursday, August 11, 2016 14:02 > *To:* BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> > *Cc:* Bill Crowell, N4HPG <n4...@comcast.net> > *Subject:* Re: [BVARC] Interesting take on FD generators > > > > Hi Scott, > > > > I fail to see how my attendance or lack thereof is relevant to an > engineering analysis of generator technology. > > > > I’ve been the alternate-energy guy for the club back in NC. > > > > What I’m discussing is extremely relevant. If you have power that you > can’t use, you’re screwed. If the RFI from the generator swamps your radio, > you’re screwed. If your radio shuts down the generator’s control circuitry, > you’re screwed. > > > > As for “big brother” - I would assume that this is not an > inverter-generator and thus your point is wanting. > > > > The topic at hand was the engineering suitability of INVERTER generators > to our uses and my responses and comments were going directly to that point. > > > > 73 > > On Aug 11, 2016, at 1:38 PM, Scott Royall via BVARC <bvarc@bvarc.org> > wrote: > > > > Ah, Bill, did you participate with BVARC in this year's FD? How many rigs > did we hang off the big brother to one of these generators? FD ops are > inherently compromised by factors greater than what you're discussing so… > > > > *From:* BVARC [mailto:bvarc-boun...@bvarc.org <bvarc-boun...@bvarc.org>] *On > Behalf Of *Bill Crowell, N4HPG via BVARC > *Sent:* Thursday, August 11, 2016 12:58 > *To:* BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> > *Cc:* Bill Crowell, N4HPG <n4...@comcast.net> > *Subject:* Re: [BVARC] Interesting take on FD generators > > > > This was very interesting. My takeaways: > > > > 1. The RF noise is still bothersome, even at S1. I’d hate to pipe that > into my headphones for 8 hours. > > 2. The dynamic load is an issue that prevents good fuel economy when > running in normal mode. This negates the economy mode. > > 3. They did NOT test the effects of RF on the control circuitry when we’re > transmitting. With that 100’ drop cord, we have to ensure that various RF > sources don’t destabilize the CPU in the generator. > > > > For our purposes, a properly sized, standard generator would be better for > these reasons: > > 1. Sinewave output from the alternator - the shaft speed is 3600rpm. > > 2. Toleration of dynamic loads. > > 3. Immunity from RF from our transmitters. > > > > Of course, this comes with more weight and lower fuel economy. > > > > *** > > > > To deal with the inverter/generator, I would recommend: > > 1. A ferro-resonant isolation transformer to deal with cleaning up the > power and mitigating RFI in both directions. > > 2. A battery or large capacitor in the 12V leads to the radio for dynamic > loading. > > 3. Something like an Astron PSU - because they’re more rugged. > > > > Still a big price to pay for some fuel efficiency. > > > > My conclusion is that these units are excellent for static loads like > lights and air conditioners and other RV type uses. We need to be very > careful when using radios with them. > > > > B > > > > > > On Aug 11, 2016, at 3:35 AM, Jon Noxon via BVARC <bvarc@bvarc.org> wrote: > > > > From the Elecraft reflector: https://youtu.be/rOH7Ze7wreQ > > > > Enjoy, > > > > Jon KF5TFJ > > _______________________________________________ > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > > > Bill Crowell, N4HPG > > Pearland, TX > > n4...@comcast.net > > I prefer to live a life of galvanic isolation. > > > > _______________________________________________ > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > > > Bill Crowell, N4HPG > > Pearland, TX > > n4...@comcast.net > > I prefer to live a life of galvanic isolation. > > > > _______________________________________________ > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > >
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