Military Quartz Crystals & Their Markings etc. - UK Vintage Radio Repair and Restoration Discussion Forum

radiozero · 10th May 2018, 2:57 pm

Hi. I'm tring to figure out what the markings mean on some vintage Air Ministry quartz crystals I have.

Okay, let's start with these markings:

* L/8512 (8512 is the frrequency in Khz, but what does L stand for?)
* ADR/HH (?)
* A/6750 (?)
* R.N.Q.C.O. Risley (?)
* ADH/LJ (?)

Thanks. Rich

G6Tanuki · 10th May 2018, 7:18 pm

Risley was "H.M.S. Gosling" during and immediately after WWII.

http://www.royalnavyresearcharchive....ses/Risley.htm

The site later became a remand prison.

Bazz4CQJ · 11th May 2018, 2:30 am

Re Risley, that's an interesting place. It was also the location of one of the big Royal Ordnance factories during WWII; according to Wiki, that's where they filled the explosive in to the Grand Slam bomb. Subsequently, it became a very important but 'low-profile' part of Britain's nuclear programme alongside Harwell. Much of what is left of Britain's nuclear engineering capacity is still there.

B

radiozero · 11th May 2018, 9:27 am

I contacted Fleet Air Arm Association on Facebook. They came back with a link to a group about WAFU. But the link does not work for me. Wonder what others get. Here is the link:

https://www.facebook.com/groups/1899...c_location=ufi

Cannot seem to find a group on Facebook that is WAFU, who are apparantly "members of all Trades of Air Engineering".

radiozero · 11th May 2018, 9:44 am

I have a crystal with marking ADR/JUL/60. So, my suspicion is that HH is a date code in ADR/HH. But cannot see how. Crystal definitely not made in 1988.

G3VKM_Roger · 11th May 2018, 1:32 pm

RNQCO is possibly Royal Navy Quartz Crystal Office?

Cheers

Roger

radiozero · 11th May 2018, 4:42 pm

As to a marking, 10A I think that is RAF issue and 10X RN issue.

Silicon · 12th May 2018, 8:03 am

Perhaps RNQCO is Royal Navy Quality Control Office.

M0FYA Andy · 12th May 2018, 9:44 am

Quote:

Originally Posted by radiozero

As to a marking, 10A I think that is RAF issue and 10X RN issue.

10A and 10X are both Air Ministry / RAF Section Reference codes, 10A is 'Miscellaneous Radio Equipment' and 10X is 'Radio Crystal Units'.

Andy

10th May 2018, 2:57 pm	#1
radiozero Hexode Join Date: Mar 2008 Location: Wakefield, West Yorkshire, UK. Posts: 444	Military Quartz Crystals & Their Markings etc. Hi. I'm tring to figure out what the markings mean on some vintage Air Ministry quartz crystals I have. Okay, let's start with these markings: * L/8512 (8512 is the frrequency in Khz, but what does L stand for?) * ADR/HH (?) * A/6750 (?) * R.N.Q.C.O. Risley (?) * ADH/LJ (?) Thanks. Rich

10th May 2018, 7:18 pm	#2
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,995	Re: Military Quartz Crystals & Their Markings etc. Risley was "H.M.S. Gosling" during and immediately after WWII. http://www.royalnavyresearcharchive....ses/Risley.htm The site later became a remand prison.

11th May 2018, 2:30 am	#3
Bazz4CQJ Dekatron Join Date: Apr 2009 Location: Oxfordshire, UK. Posts: 4,934	Re: Military Quartz Crystals & Their Markings etc. Re Risley, that's an interesting place. It was also the location of one of the big Royal Ordnance factories during WWII; according to Wiki, that's where they filled the explosive in to the Grand Slam bomb. Subsequently, it became a very important but 'low-profile' part of Britain's nuclear programme alongside Harwell. Much of what is left of Britain's nuclear engineering capacity is still there. B __________________ Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.

11th May 2018, 9:27 am	#4
radiozero Hexode Join Date: Mar 2008 Location: Wakefield, West Yorkshire, UK. Posts: 444	Re: Military Quartz Crystals & Their Markings etc. I contacted Fleet Air Arm Association on Facebook. They came back with a link to a group about WAFU. But the link does not work for me. Wonder what others get. Here is the link: https://www.facebook.com/groups/1899...c_location=ufi Cannot seem to find a group on Facebook that is WAFU, who are apparantly "members of all Trades of Air Engineering". Last edited by radiozero; 11th May 2018 at 9:40 am.

11th May 2018, 9:44 am	#5
radiozero Hexode Join Date: Mar 2008 Location: Wakefield, West Yorkshire, UK. Posts: 444	Re: Military Quartz Crystals & Their Markings etc. I have a crystal with marking ADR/JUL/60. So, my suspicion is that HH is a date code in ADR/HH. But cannot see how. Crystal definitely not made in 1988.

11th May 2018, 1:32 pm	#6
G3VKM_Roger Heptode Join Date: Jun 2012 Location: Southeast Norfolk, UK. Posts: 773	Re: Military Quartz Crystals & Their Markings etc. RNQCO is possibly Royal Navy Quartz Crystal Office? Cheers Roger Last edited by G3VKM_Roger; 11th May 2018 at 1:33 pm. Reason: spelling

11th May 2018, 4:42 pm	#7
radiozero Hexode Join Date: Mar 2008 Location: Wakefield, West Yorkshire, UK. Posts: 444	Re: Military Quartz Crystals & Their Markings etc. As to a marking, 10A I think that is RAF issue and 10X RN issue.

12th May 2018, 8:03 am	#8
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,161	Re: Military Quartz Crystals & Their Markings etc. Perhaps RNQCO is Royal Navy Quality Control Office.