Tester AT 4557 - UK Vintage Radio Repair and Restoration Discussion Forum

Skywave · 12th Mar 2019, 12:16 am

An item of what I suspect is a piece of vintage telephony equipment and possibly ex-military - which is for sale at an auction near me - has caught my eye. It is marked TESTER AT 4557.
An Internet search revealed nothing.
Anyone know anything about it, please?

Thanks.
Al.

Pellseinydd · 13th Mar 2019, 11:14 pm

Tester AT4557 - For testing current adj. of relays other than double coil bridge types. See also Tester AT4569 and then the Vocabulary of Engineering Stores goes on to list all its components.

Hope that helps?

Dave Moll · 14th Mar 2019, 9:12 am

If you're a member of THG*, there is a circuit diagram on their (members-only) resource section.

*If you're not a member, I definitely recommend it if you are serious about old telecommunication equipment.

Skywave · 14th Mar 2019, 2:12 pm

Thank you for your replies. I did make a remote 'commission bid', but that was unsuccessful in obtaining this item.

Al.

12th Mar 2019, 12:16 am	#1
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Tester AT 4557 An item of what I suspect is a piece of vintage telephony equipment and possibly ex-military - which is for sale at an auction near me - has caught my eye. It is marked TESTER AT 4557. An Internet search revealed nothing. Anyone know anything about it, please? Thanks. Al.

13th Mar 2019, 11:14 pm	#2
Pellseinydd Heptode Join Date: Jul 2007 Location: Flintshire, UK. Posts: 707	Re: Tester AT 4557 Tester AT4557 - For testing current adj. of relays other than double coil bridge types. See also Tester AT4569 and then the Vocabulary of Engineering Stores goes on to list all its components. Hope that helps?

14th Mar 2019, 9:12 am	#3
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,127	Re: Tester AT 4557 If you're a member of THG, there is a circuit diagram on their (members-only) resource section. If you're not a member, I definitely recommend it if you are serious about old telecommunication equipment. __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)

14th Mar 2019, 2:12 pm	#4
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: Tester AT 4557 Thank you for your replies. I did make a remote 'commission bid', but that was unsuccessful in obtaining this item. Al.