Marconi PS 213A key info. - UK Vintage Radio Repair and Restoration Discussion Forum

rm31859 · 1st Aug 2022, 1:31 pm

Hello All, I am new to the forum and I hope that this is the correct place for this. I am a Ham operator here in the states (km4orn) and I collect vintage code practice sets and code keys. I have what appears to be a Marconi PS 213A export key. It has no model or serial number on the base. It is missing one of the cheese head terminal screws and washers and also the finger knob. Any help in acquiring these parts would be greatly appreciated. Thanks.

Silicon · 2nd Aug 2022, 12:07 am

The images I found on the internet suggest that you need a nickel plated brass slotted cheesehead machine screw.

I estimate that it is 2BA (British Association) or larger.

It could have a larger than standard head for the thread size.

Are you able to make accurate measurements?

majoconz · 4th Aug 2022, 9:05 pm

One of these...

https://picclick.co.uk/Marconi-PS-21...291854570.html

Supposedly a very rare key - one post said GBP620! Looks similar to my "Key, morse, type D, ref no 10A/7373."

1st Aug 2022, 1:31 pm	#1
rm31859 Diode Join Date: Oct 2021 Location: CONOVER, NC USA Posts: 1	Marconi PS 213A key info. Hello All, I am new to the forum and I hope that this is the correct place for this. I am a Ham operator here in the states (km4orn) and I collect vintage code practice sets and code keys. I have what appears to be a Marconi PS 213A export key. It has no model or serial number on the base. It is missing one of the cheese head terminal screws and washers and also the finger knob. Any help in acquiring these parts would be greatly appreciated. Thanks.

2nd Aug 2022, 12:07 am	#2
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,171	Re: Marconi PS 213A key info. The images I found on the internet suggest that you need a nickel plated brass slotted cheesehead machine screw. I estimate that it is 2BA (British Association) or larger. It could have a larger than standard head for the thread size. Are you able to make accurate measurements?

4th Aug 2022, 9:05 pm	#3
majoconz Heptode Join Date: Jan 2008 Location: Ashhurst, Manawatu, New Zealand Posts: 571	Re: Marconi PS 213A key info. One of these... https://picclick.co.uk/Marconi-PS-21...291854570.html Supposedly a very rare key - one post said GBP620! Looks similar to my "Key, morse, type D, ref no 10A/7373." Attached Thumbnails __________________ Cheers - Martin ZL2MC