AR88LF Original uses? - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

ms660 · 3rd Dec 2016, 6:36 pm

I thought the Hallicrafters S27 was a VHF/UHF job.

Lawrence.

M0SOE_Bruce · 3rd Dec 2016, 7:24 pm

Here's a photo where several generations of receivers were used. It is Canadian Forces Station Alert above the Arctic circle. The photo was taken about 1958. The AR88 is a LF version. As Radio Wrangler said there were many navigational beacons on vlf and their function had to be monitored, especially when an aircraft is 500 miles from nowhere.

During WW2 the Canadian Navy fleet broadcast freq was 73 KHz as well as the Atlantic fleet freq was 105 KHz. Many uses for the LF version.

G6Tanuki · 3rd Dec 2016, 7:47 pm

As well as navaid beacons there were numerous weather-data transmissions in the 200-500KHz range.
The simple ones were just CW but there were also RTTY versions and some using early analog image-transmission techniques [search for "fultograph" or "mufax"] which would have been ideal material for the 88LF to receive.

3rd Dec 2016, 6:36 pm	#21
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: AR88LF Original uses? I thought the Hallicrafters S27 was a VHF/UHF job. Lawrence.

3rd Dec 2016, 7:24 pm	#22
M0SOE_Bruce Pentode Join Date: May 2013 Location: Deal, Kent, UK. Posts: 139	Re: AR88LF Original uses? Here's a photo where several generations of receivers were used. It is Canadian Forces Station Alert above the Arctic circle. The photo was taken about 1958. The AR88 is a LF version. As Radio Wrangler said there were many navigational beacons on vlf and their function had to be monitored, especially when an aircraft is 500 miles from nowhere. During WW2 the Canadian Navy fleet broadcast freq was 73 KHz as well as the Atlantic fleet freq was 105 KHz. Many uses for the LF version. Attached Thumbnails

3rd Dec 2016, 7:47 pm	#23
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: AR88LF Original uses? As well as navaid beacons there were numerous weather-data transmissions in the 200-500KHz range. The simple ones were just CW but there were also RTTY versions and some using early analog image-transmission techniques [search for "fultograph" or "mufax"] which would have been ideal material for the 88LF to receive.