Hop-AC8NS's latest activity

Thought I would update this thread and perhaps elicit some more responses. So far, only @Baluncore and @DaveE have participated with...

200ns per 100ft because in reflectometry, it must go there and back.

Ah, got it—the round-trip doubles the timing spread, which could affect bit sync in comms. For APOLLO's small, flat, point-like (from...

APD background to this discussion There is a type of photon-activated device that goes into avalanche conduction by means of impact...

Hmmm. Path length variation is important for a signal that has traveled 384,400 kilometers? Light pokes along at roughly a nanosecond...

Yes, I expect only one patch on the Moon, a minimum of two kilometers diameter but maybe larger because of Earth's atmospheric...

The doubler requires a laser source to produce frequency-doubled green laser light. I have no intention, nor the need, to duplicate what...

The doubler crystal (typically KDP) requires a laser source to produce frequency-doubled green laser light. A diode pumped solid-state...

You are right about that! What radio frequency should I be starting the modulation with? How much in frequency do we "chirp" the long RF...

In TARC we have a retired member, San Yoder, who spent his career involved with electrical power transmission. The next time I see him I...

The core wire of an aluminium or copper catenary cable is usually a high tensile steel wire. Skin effect prevents high currents and...

Thank you. I hope I won't bore anyone here. Yes, the proposed modulation scheme is a form of amplitude modulation that uses digital...

The power loss in transmission lines is unavoidable, but when alternating current is involved there is also the problem of "skin effect"...

FCC-licensed amateur radio operators are NOT professionals, by definition. We pursue the hobby without pecuniary interest. Professionals...

Welcome to PF. I would suggest that the laser diode be on-off modulated with an RF chirp from a DDS that covers a wideband. The...