Racal/Amplivox 'Astrolite' headsets - UK Vintage Radio Repair and Restoration Discussion Forum

Sparks · 31st Dec 2017, 12:25 pm

I've acquired several used examples of these over the years. A few bear the tag 'WR 721' on the earphone housing as in the picture. One or two others have the tag on the microphone amplifier. I don't think it's anything to do with the amp as the part numbers are quite distinct. Does anybody know what WR 721 means or care to venture a guess ? Thankyou.

ms660 · 31st Dec 2017, 1:16 pm

CAA approval number? WR = Wireless Receiver?

Eg: Not a wireless receiver in itself but part of a system insofar as WR covers anything comms? (WR number near bottom of 2nd page):

http://www.avionteq.com/Document/B69...tion-Sheet.pdf

EDIT: Here you go:

http://publicapps.caa.co.uk/modalapp...&AppNo=WR00721

And the search page, choose WR from the identifier box, then enter the number in the number box:

http://publicapps.caa.co.uk/modalapp....aspx?appid=23

Lawrence.

Tim · 31st Dec 2017, 1:57 pm

I have a pair of those labelled up " Avley Cybervox" shock I think came from an old language lab. I converted them to stereo and used a 5 pin din connector so I could also use the mic.

Sparks · 31st Dec 2017, 2:18 pm

Thank you Tim and Lawrence. Amazingly the approval date of 14.01.71 is three days older than me! I also have a headset with the Cybervox tag - agreed likely to be an ex-language lab item. We certainly used Astrolites with our Tandberg lab in high school. It's a shame Esterline no longer make them. Expensive but durable and lots of adaptable configurations possible.

31st Dec 2017, 12:25 pm	#1
Sparks Heptode Join Date: Oct 2006 Location: Leeds, West Yorkshire, UK. Posts: 598	Racal/Amplivox 'Astrolite' headsets I've acquired several used examples of these over the years. A few bear the tag 'WR 721' on the earphone housing as in the picture. One or two others have the tag on the microphone amplifier. I don't think it's anything to do with the amp as the part numbers are quite distinct. Does anybody know what WR 721 means or care to venture a guess ? Thankyou. Attached Thumbnails

31st Dec 2017, 1:16 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Racal/Amplivox 'Astrolite' headsets CAA approval number? WR = Wireless Receiver? Eg: Not a wireless receiver in itself but part of a system insofar as WR covers anything comms? (WR number near bottom of 2nd page): http://www.avionteq.com/Document/B69...tion-Sheet.pdf EDIT: Here you go: http://publicapps.caa.co.uk/modalapp...&AppNo=WR00721 And the search page, choose WR from the identifier box, then enter the number in the number box: http://publicapps.caa.co.uk/modalapp....aspx?appid=23 Lawrence. Last edited by ms660; 31st Dec 2017 at 1:37 pm.

31st Dec 2017, 1:57 pm	#3
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,310	Re: Racal/Amplivox 'Astrolite' headsets I have a pair of those labelled up " Avley Cybervox" shock I think came from an old language lab. I converted them to stereo and used a 5 pin din connector so I could also use the mic. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

31st Dec 2017, 2:18 pm	#4
Sparks Heptode Join Date: Oct 2006 Location: Leeds, West Yorkshire, UK. Posts: 598	Re: Racal/Amplivox 'Astrolite' headsets Thank you Tim and Lawrence. Amazingly the approval date of 14.01.71 is three days older than me! I also have a headset with the Cybervox tag - agreed likely to be an ex-language lab item. We certainly used Astrolites with our Tandberg lab in high school. It's a shame Esterline no longer make them. Expensive but durable and lots of adaptable configurations possible.