Narrative:

I was at the tower base at lvk and had been cleared to taxi to runway 25R. There are 2 parallel txwys on the north side of the runway. Being unfamiliar with the airport I misread my airport diagram and while taxiing eastbound thought I was adjacent to the runway but was really adjacent to the other taxiway. I stopped short of the 'runway' (second taxiway) and observed an aircraft that I thought was in position and holding on runway 25R. He had actually just done a run-up and elected to taxi back to the parking area wbound on this second taxiway. His departure wbound on the taxiway, was interpreted in the back of my mind as a departure on runway 25R, as I was busy with my run-up. When cleared for takeoff I pulled onto this taxiway and departed without incident. I heard the tower call my aircraft number just as I started my takeoff roll but he was covered up by others on the frequency at the same time. While I am acutely aware that the entire incident was entirely my fault I have a suggestion that, if implemented, would have caused me to abort the takeoff within seconds. I am sure that the tower's transmission to me upon takeoff roll was to abort, but it was not received as previously noted. I suggest that controllers mikes be equipped with a second transmit button, perhaps red in color. When an emergency condition exists that requires his transmission to be received he would use this button. This button would engage an in-line linear amplifier that would raise his power from 2-3 watts to perhaps 100 watts. This would preclude his signal from being overridden pretty much anywhere within several mi. These amplifiers are small, reliable, and readily available on the market for several hundred dollars. PIC is also a licensed communications engineer, 44 yrs experience.

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Original NASA ASRS Text

Title: PLT OF AN EXPERIMENTAL ACFT MISTAKENLY TOOK OFF FROM A TXWY WHICH PARALLELED THE INTENDED RWY. SINCE THERE WERE PARALLEL TXWYS AND RWYS, THE RPTR BELIEVED THAT HE WAS ON THE RWY AFTER TAXIING OUT ON A PARALLEL TXWY. TWR WAS 'STEPPED ON' WHEN ATTEMPTING TO INTERVENE AND HAVE THE RPTR ABORT.

Narrative: I WAS AT THE TWR BASE AT LVK AND HAD BEEN CLRED TO TAXI TO RWY 25R. THERE ARE 2 PARALLEL TXWYS ON THE N SIDE OF THE RWY. BEING UNFAMILIAR WITH THE ARPT I MISREAD MY ARPT DIAGRAM AND WHILE TAXIING EBOUND THOUGHT I WAS ADJACENT TO THE RWY BUT WAS REALLY ADJACENT TO THE OTHER TXWY. I STOPPED SHORT OF THE 'RWY' (SECOND TXWY) AND OBSERVED AN ACFT THAT I THOUGHT WAS IN POS AND HOLDING ON RWY 25R. HE HAD ACTUALLY JUST DONE A RUN-UP AND ELECTED TO TAXI BACK TO THE PARKING AREA WBOUND ON THIS SECOND TXWY. HIS DEP WBOUND ON THE TXWY, WAS INTERPRETED IN THE BACK OF MY MIND AS A DEP ON RWY 25R, AS I WAS BUSY WITH MY RUN-UP. WHEN CLRED FOR TKOF I PULLED ONTO THIS TXWY AND DEPARTED WITHOUT INCIDENT. I HEARD THE TWR CALL MY ACFT NUMBER JUST AS I STARTED MY TKOF ROLL BUT HE WAS COVERED UP BY OTHERS ON THE FREQ AT THE SAME TIME. WHILE I AM ACUTELY AWARE THAT THE ENTIRE INCIDENT WAS ENTIRELY MY FAULT I HAVE A SUGGESTION THAT, IF IMPLEMENTED, WOULD HAVE CAUSED ME TO ABORT THE TKOF WITHIN SECONDS. I AM SURE THAT THE TWR'S XMISSION TO ME UPON TKOF ROLL WAS TO ABORT, BUT IT WAS NOT RECEIVED AS PREVIOUSLY NOTED. I SUGGEST THAT CTLRS MIKES BE EQUIPPED WITH A SECOND XMIT BUTTON, PERHAPS RED IN COLOR. WHEN AN EMER CONDITION EXISTS THAT REQUIRES HIS XMISSION TO BE RECEIVED HE WOULD USE THIS BUTTON. THIS BUTTON WOULD ENGAGE AN IN-LINE LINEAR AMPLIFIER THAT WOULD RAISE HIS PWR FROM 2-3 WATTS TO PERHAPS 100 WATTS. THIS WOULD PRECLUDE HIS SIGNAL FROM BEING OVERRIDDEN PRETTY MUCH ANYWHERE WITHIN SEVERAL MI. THESE AMPLIFIERS ARE SMALL, RELIABLE, AND READILY AVAILABLE ON THE MARKET FOR SEVERAL HUNDRED DOLLARS. PIC IS ALSO A LICENSED COMS ENGINEER, 44 YRS EXPERIENCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.