The personal website of Scott W Harden
July 20th, 2019

Started Transmitting Letters

I finished writing the microcontroller code to read the GPS time and only start transmissions when the minutes value ends with a zero. The signal now stacks nicely in 10-minute grabs. Now that GPS and the oven is working well I've started sending my call sign (AJ4VD).

AJ4VD spotted in Pensacola, FL (W4HBK)

First spot occurred while I was actively adjusting the transmission length

AJ4VD spotted in Greensboro, NC (WD4ELG)

5x frame stack (mean frame) from the WD4ELG grabber reveals the AJ4VD signal much better, and confirms the GPS timer is working well.

Markdown source code last modified on January 18th, 2021
---
title: Started Transmitting Letters
date: 2019-07-20 21:00:00
tags: qrss
---

# Started Transmitting Letters

I finished writing the [microcontroller code to read the GPS time](https://github.com/swharden/QRSS-hardware/tree/master/builds/keyer) and only start transmissions when the minutes value ends with a zero. The signal now stacks nicely in 10-minute grabs. Now that GPS and the oven is working well I've started sending my call sign (AJ4VD).

### AJ4VD spotted in Pensacola, FL (W4HBK) 

First spot occurred while I was actively adjusting the transmission length

<div class="text-center img-border">

[![](W4HBK-first-callsign_thumb.jpg)](W4HBK-first-callsign.jpg)

</div>

### AJ4VD spotted in Greensboro, NC (WD4ELG)

<div class="text-center img-border">

[![](WD4ELG-first-callsign_thumb.jpg)](WD4ELG-first-callsign.jpg)

</div>

5x frame stack (mean frame) from the WD4ELG grabber reveals the AJ4VD signal much better, and confirms the GPS timer is working well.


<div class="text-center img-border">

[![](WD4ELG-5x-stack_thumb.jpg)](WD4ELG-5x-stack.jpg)

</div>