Please identify this equipment

[Hanno Spoelstra]

Receiver Telesonic YA4915

[Hanno Spoelstra]

Some kind of binocular?

[Hanno Spoelstra]

W.S. No. 38 spare valve sets:

[Hanno Spoelstra]

Unknown headset. The headphone is marked “Ffh.39d”.

[Hanno Spoelstra]

Originally Posted by Hanno Spoelstra

Receiver Telesonic YA4915

Found this after getting a tip from Tony Barron: https://www.wftw.nl/06%20Telesonic%20v1%2001.pdf

[Chris Suslowicz]

Originally Posted by Hanno Spoelstra

W.S. No. 38 spare valve sets:

Case, 4-valve, No.3.

One of those "Multi-Purpose Parts" that was used with different sets:

3 x ARP12, 1 x ATP4 is the WS38 (Mk1 & Mk2) version - it may not have been issued with the fully-sealed Mk.3.

Two cases with ARP12, AR8, ARP37 & ATP4 were issued with the WS46.

(Case, Spare Valve, No.2 (or 2/T) was the WS38AFV spares case and contained a 4-pin 12V vibrator, spare bulb and aerial pigtails.)

Best regards,
Chris.

[Chris Suslowicz]

Originally Posted by Hanno Spoelstra

Some kind of binocular?

Homemade from pieces of gunsight or periscope?

(I thought it was part of the Telesonic unit to begin with!)

[Hanno Spoelstra]

Originally Posted by Chris Suslowicz

Case, 4-valve, No.3.

One of those "Multi-Purpose Parts" that was used with different sets:

3 x ARP12, 1 x ATP4 is the WS38 (Mk1 & Mk2) version - it may not have been issued with the fully-sealed Mk.3.

Two cases with ARP12, AR8, ARP37 & ATP4 were issued with the WS46.

(Case, Spare Valve, No.2 (or 2/T) was the WS38AFV spares case and contained a 4-pin 12V vibrator, spare bulb and aerial pigtails.)

Thank you, Chris!

[Hanno Spoelstra]

Originally Posted by Chris Suslowicz

Homemade from pieces of gunsight or periscope?

(I thought it was part of the Telesonic unit to begin with!)

It sure looks it was cobbled together, or at least the visor bit was added.

[Hanno Spoelstra]

Originally Posted by Hanno Spoelstra

Unknown headset. The headphone is marked “Ffh.39d”.

An internet search yielded the info that 'Ffh.39d' stands for Festungsfernhörer 39 Doppelt as used by the German Kriegsmarine Coastal Artillery. This type of headset plugs into the FF33 field phone and desk phone.

E.g. https://fjm44.com/product/rare-festu...er-39-doppelt/ and https://militariaplaza.nl/new/coasta...0-25582-detail

[Hanno Spoelstra]

Does anybody where/ for what this receiver was used?

"Air Ministry Receiver Unit Type 161. Ref. No. 10DB/6106. Ser. no. 4509"

[David Dunlop]

Hanno.

Your item might be all, or part of a small VHF transceiver system developed by Plessey postwar, targeting, I think, training aircraft of the day.


David

[Mike K]

Part of Lucero 11 whatever that was.Looks like Airborne Radar.

https://www.secretprojects.co.uk/thr...numbers.34787/

ARI.5645 – AI.Mk.VIIIB air-search/interception radar with Lucero Mk.II interrogator


http://air-ministry.uk/index.html

[Chris Suslowicz]

Originally Posted by Mike Kelly

Part of Lucero 11 whatever that was.Looks like Airborne Radar.

https://www.secretprojects.co.uk/thr...numbers.34787/

ARI.5645 – AI.Mk.VIIIB air-search/interception radar with Lucero Mk.II interrogator


http://air-ministry.uk/index.html

Are you sure it's not part of the previous equipment ARI.5608 "Liquid Lunch"?

(Interesting codename = pint of beer (or several)! possibly from the team that came up with "Village Inn" and "Boozer"?

Hmm... after more research possibly not (from http://air-ministry.uk/ari.htm ):

ARI 5608 Liquid Lunch
Receiver R3588

ARI 5645 Lucero II
Transmitter-Receiver TR3566
Power unit type 532
Receiving unit type 161
Switch unit type 115
transmitter unit type 105
Waveform generator type 3C
Control unit type 222A

"Liquid Lunch" was apparently an IFF transponder to indicate "I'm Friendly" to the "Village Inn" Automatic Gun Laying Turret radar.

Chris.

[Hanno Spoelstra]

David, Mike, Chris,

Thanks for the insight and links. I also found this:

https://www.qsl.net/pe1ngz/airforce/...ml#Lucero%20II

Lucero II
RAF designation ARI 5645

Function
Lucero is a homing, beam approach and IFF interrogator for use with H2S, ASV and AI. It uses the IF amplification stages of the equipment with which it is used and also the display appears on the CRT of the parent equipment. Due to this inter-connection and also to the fact that different marks of the equipment to be interrogated have different carrier frequencies, several variations of Lucero have been produced. The TR 3566A. which here is briefly described, is the Bomber and Coastal Command version, the same basic set being used by both commands. Push-button frequency selector is used by Bomber Command. while Coastal use a functional selector switch.

Year of issue 1944

Type of wave Pulse modulated

Pulse width 5 microseconds

Pulse recurrence frequency 217 c/s

Frequency range
Range Transmitter Receiver
1 171-181 (177) Mc/s 171-181 (176) Mc/s
2 212-226 168-178
3 222-236 210-238
4 222-236 220-238

Main items
Transmitter Receiver TR 3566
Power unit 532
Receiving unit 161
Switch unit type 115
transmitter unit type 105
Waveform generator type 3C
Control unit type 222A

Remarks
Used by Bomber Command and Fleet Air Arm.
Developed for 1.7 meter beacons by 9 and 3 cm radar (H2S and ASV Mk VI)
some versions switchable to two Eureka channels.

PS: ARI stands for Air Radio Installation, a designation system created by the British Air Ministry for the installations of radio equipment in the late 1930s, each number reflected the standardised installation of a particular radio transmitter or receiver and all the various elements including power units, aerial connections, and control panels etc.
During the war the range of radio equipment multiplied and the installations of all kinds of various receivers and transmitters such as radars and homing devices, radio altimeters and intelligence-gathering signals receivers were added to the list. The system seems to have been in use until at least the late 1980s/early 1990s.