In my desperate rush to get back home this weekend and into the shack to change the power supply (thinking it could be a unstable power source and hence being the cause of the problem), I connected my linear bench supply and inadvertently fried both the U2 and QLG1 with 13.8VOLTS! ............... so problem solved. Doh!
However, that's opened up a brave new world which demands new U3S and QLG1 kits. The lengths people will go to in attaining the Ultimate.
So guys, I'd like to thank everyone who responded to my initial plight. The spirit of QRP-Labs lives on.

Hi James

Regarding the QLG1: the voltage regulator provides 3.3V to the GPS RF module. So that should survive. However, the 74ACT08 chip is powered directly by 5V, not through the regulator. 13.8V could kill the 74ACT08.?

73 Hans G0UPL?

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On Oct 28, 2017 8:22 PM, "James Anderson" <james21170@...> wrote:

Hello roger.?

Didn't the QLG1 survive. It has a voltage regulator capable of a supply voltage of 28 volts.?

Been there and done the 13.8 thing myself Hi Hi.?

73 James. 2E0MUA?

On 28 Oct 2017, at 17:40, Roger Reeves <m0roj@...> wrote:

In my desperate rush to get back home this weekend and into the shack to change the power supply (thinking it could be a unstable power source and hence being the cause of the problem), I connected my linear bench supply and inadvertently fried both the U2 and QLG1 with 13.8VOLTS! ............... so problem solved. Doh!
However, that's opened up a brave new world which demands new U3S and QLG1 kits. The lengths people will go to in attaining the Ultimate.
So guys, I'd like to thank everyone who responded to my initial plight. The spirit of QRP-Labs lives on.

And it did, Hans :-(