Re: Transmitter update
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To first address Josh's comment, the GPS reception and HF transmissions won't be simultaneous, so cross-interference won't be an issue onboard. I'll first collect the GPS data (warm start takes a few seconds to get a fix and cold start is at most a couple minutes), then go through a 6 minute transmission cycle, then repeat every 10 minutes.
Stan, I'll have a very thin fishing line tether from the balloon down to the payload/transmitter. The top half of the 20 meter dipole antenna (around 105") will be intermingled with this fishing line from the payload almost up to the balloon. I'll probably use super glue or nail polish to attach it to the fishing line every couple feet to keep it taught and upright. The bottom half of the dipole antenna will dangle down freely from the payload/transmitter. At least that's the plan.
On Sun, Jun 11, 2017 at 8:35 PM, Stanley James Wellard <stanwellard@...> wrote: