diff --git a/application/controllers/Adif.php b/application/controllers/Adif.php
index b1bb25194..e3dafd313 100644
--- a/application/controllers/Adif.php
+++ b/application/controllers/Adif.php
@@ -85,17 +85,50 @@ class adif extends CI_Controller {
 
 	}
 
-	// Export all QSO Data in ASC Order of Date.
+	// Export all QSO Data in ASC Order of Date - use chunks to avoid memory exhaustion
 	public function exportall() {
-		// Set memory limit to unlimited to allow heavy usage
 		$this->require_tab_access('export');
+
 		ini_set('memory_limit', '-1');
+		set_time_limit(300);
 
 		$this->load->model('adif_data');
+		$this->load->library('AdifHelper');
 
-		$data['qsos'] = $this->adif_data->export_all(null, $this->input->post('from', true), $this->input->post('to', true));
+		$from = $this->input->post('from', true);
+		$to = $this->input->post('to', true);
 
-		$this->load->view('adif/data/exportall', $data);
+		$filename = $this->session->userdata('user_callsign').'-'.date('Ymd-Hi').'.adi';
+		header('Content-Type: text/plain; charset=utf-8');
+		header('Content-Disposition: attachment; filename="'.$filename.'"');
+
+		// Output ADIF header // No chance to use exportall-view any longer, because of chunking logic
+		echo "Wavelog ADIF export\n";
+		echo "<ADIF_VER:5>3.1.6\n";
+		echo "<PROGRAMID:".strlen($this->config->item('app_name')).">".$this->config->item('app_name')."\r\n";
+		echo "<PROGRAMVERSION:".strlen($this->optionslib->get_option('version')).">".$this->optionslib->get_option('version')."\r\n";
+		echo "<EOH>\n\n";
+
+		// Stream QSOs in 5K chunks
+		$offset = 0;
+		$chunk_size = 5000;
+
+		do {
+			$qsos = $this->adif_data->export_all_chunked(null, $from, $to, false, null, $offset, $chunk_size);
+
+			if ($qsos->num_rows() > 0) {
+				foreach ($qsos->result() as $qso) {
+					echo $this->adifhelper->getAdifLine($qso);
+				}
+
+				// Free memory
+				$qsos->free_result();
+			}
+
+			$offset += $chunk_size;
+		} while ($qsos->num_rows() > 0);
+
+		exit;
 	}
 
 
diff --git a/application/models/Adif_data.php b/application/models/Adif_data.php
index e34845546..55e3a569c 100644
--- a/application/models/Adif_data.php
+++ b/application/models/Adif_data.php
@@ -238,6 +238,48 @@ class adif_data extends CI_Model {
 
 		return $this->db->get();
 	}
+
+	function export_all_chunked($api_key = null, $from = null, $to = null, $exportLotw = false, $onlyop = null, $offset = 0, $limit = 5000) {
+		$this->load->model('logbooks_model');
+		if ($api_key != null) {
+			$this->load->model('api_model');
+			if (strpos($this->api_model->access($api_key), 'r') !== false) {
+				$this->api_model->update_last_used($api_key);
+				$user_id = $this->api_model->key_userid($api_key);
+				$logbooks_locations_array = $this->list_station_locations($user_id);
+			}
+		} else {
+			$this->load->model('stations');
+			$logbooks_locations_array = $this->list_station_locations($this->session->userdata('user_id'));
+		}
+
+		$this->db->select($this->config->item('table_name').'.*, station_profile.*, dxcc_entities.name as station_country');
+		$this->db->order_by("COL_TIME_ON", "ASC");
+		$this->db->join('station_profile', 'station_profile.station_id = '.$this->config->item('table_name').'.station_id');
+		if ($from) {
+			$this->db->where("date(".$this->config->item('table_name').".COL_TIME_ON) >= ", $from);
+		}
+		if ($to) {
+			$this->db->where("date(".$this->config->item('table_name').".COL_TIME_ON) <= ",$to);
+		}
+		if ($onlyop) {
+			$this->db->where("upper(".$this->config->item('table_name').".col_operator)",$onlyop);
+		}
+		if ($exportLotw) {
+			$this->db->group_start();
+			$this->db->where($this->config->item('table_name').".COL_LOTW_QSL_SENT != 'Y'");
+			$this->db->or_where($this->config->item('table_name').".COL_LOTW_QSL_SENT", NULL);
+			$this->db->group_end();
+		}
+		$this->db->where_in('station_profile.station_id', $logbooks_locations_array);
+		$this->db->join('dxcc_entities', 'station_profile.station_dxcc = dxcc_entities.adif');
+
+		// Add chunking
+		$this->db->limit($limit, $offset);
+
+		$query = $this->db->get($this->config->item('table_name'));
+		return $query;
+	}
 }
 
 ?>