https://www.youtube.com/watch?v=seR51zMKaHw
I explore the antenna transformer and very odd variable resistor(?) ahead of the first tube. But first, squirrel attack!

https://www.youtube.com/watch?v=Dt_7yajBldE
I reveal the sad truth about this 'Ultradyne' radio but with all I've come to understand about it, I should be able to make it receive something.

https://www.youtube.com/watch?v=57YlICrxHyg
Now that I have the radio working, I explore some of the operating factors to see if any particular improvements can be made.

http://www.radiopharos.it/Mescolatori%20RF%20Mixers/The%20ingenious%20circuit%20of%20Monsieur%20Lacault-Part%20II.htm
The L1 Ultradyne receiver was not the only one designed by R.E. Lacault, he designed several others: the Ultradyne L2 and L3, the LR4 and the R.E.L.9. ... (a U.S. Patent, No 1,537,708 was released to him in 1925) but reached the "popularity", in particular in the United States, at the end of the twenties through the development and production

https://sparkbench.com/homebrew/Superhet/ultradynehow.html
This apparatus is named the ultradyne, by Mr. Robert E. Lacault, engineer of the French Signal Corps, who developed it. The ultradyne receiver uses intermediate transformers, and a detector for reducing modulated signals to audibility, but the part of the circuit corresponding to the first detector and oscillator of the superheterodyne is quite

https://www.radiomuseum.org/r/lacault_ultradyne_l2.html
Ultradyne L2 UX tubes Radio Phenix Radio Corp.; New York, build 1925/1926, 11 pictures, 1 schematics, 8 tubes, United States of America , semiconductors ... Broadcast Receiver - or past WW2 Tuner; Radiomuseum.org ID; 45786; alternative name: Lacault, R.E. ... In August 1925 the UV201A was withdrawn and replaced by the UX201A. We therefore show

https://www.radiomuseum.org/r/radioelect_r_e_lecault_lr4_ultradyne.html
Lacault LR4 Ultradyne kit based on R. E. Lacault's Ultradyne circuit. ... Circa 1925 The Radio Electric Laboratories catalog page 6-7; Author; Model page created by Alan Larsen. See "Data change" for further contributors. Other Models; Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for

https://www.youtube.com/watch?v=yNg8lSl9GoY
Step by step, I'm getting closer to operating this radio.

https://www.radiomuseum.org/r/lacault_ultradyne_l1.html
The first Ultradyne model was just called "Ultradyne". Unofficially it was later called L1 (to distinguish it from its successor L2), but that never appeared on a Radio or in an advertisement. Ad were run by Phenix, where Lacault was Chief Engineer. Literature/Schematics (1) Ad from Radio Broadcast, June 1924, p. 175; Author

http://www.radiopharos.it/Mescolatori%20RF%20Mixers/The%20ingenious%20circuit%20of%20Monsieur%20Lacault-Part%20I.htm
The first "home" super heterodyne radio receiver designed by Lacault was released in 1924 by the Phenix Radio Corporation of New York, where he was a consultant. This first model was called Ultradyne (shortly later Ultradyne L-1) and sold in 1924, only in kit (without cabinet) because of patent disputes, other models followed more or less

http://www.radiopharos.it/Mescolatori%20RF%20Mixers/The%20Modulation%20System%20and%20the%20Ultradyne.htm
THE MODULATION SYSTEM AND THE ULTRADYNE . With reference to: The ingenious circuit of Monsieur Lacault - Part I . R.E. Lacault returned to New York, accompanied by his wife Alice, on 11th August 1923. The ship, named Paris, took almost a week to cross the Atlantic Ocean from the port of Le Havre, in France, to get to the one in New York.

https://antiqueradios.com/forums/viewtopic.php?p=3560493
Ultradyne L2 Notes and Comments : Page 2 of 2 [ 27 posts ] Go to page Previous 1, 2 Print view | E-mail friend: Previous topic | Next topic : Author Message; Chas Post subject: Re: Ultradyne L2 Notes and Comments. Posted: Aug Fri 19, 2022 1:02 am . Member: Joined: Jan Thu 01, 1970 12:00 am

https://www.youtube.com/watch?v=oYgRdfrk8Sw
I focus on making this radio receive regular stations and after a lot of frustration, to my surprise, I succeed.

http://www.antiqueradio.com/corkutt_superhet.html
The oscillator coil as well as the IF transformers were by Phenix Radio Corporation, a fact that sent me scurrying to my copy of McMahon's Radio Collector's Guide. Between 1924-1926, the Phenix Company sold 5- and 8-tube LaCault Ultradynes and kits. Under R.E. LaCault, there was a single entry, a 9-tube Ultradyne kit — the LR-4.

https://www.radiomuseum.org/r/phenix_ultradyne_l2.html
New York. Shape. Tablemodel, Box - most often with Lid (NOT slant panel). Dimensions (WHD) 32 x 9 x 10 inch / 813 x 229 x 254 mm. Notes. The Ultradyne L2 was first manufactured for the UV201A with thoriated filament, which was announced in December 1922. In August 1925 the UV201A was withdrawn and replaced by the UX201A.

https://antiqueradios.com/forums/viewtopic.php?p=3292959
Ultradyne L1 - Seeking copy of it 1920s 32 page kit brochure : Page 1 of 1 [ 11 posts ] Print view | E-mail friend: Previous topic | Next topic : Author Message; ssmolkin Post subject: Ultradyne L1 - Seeking copy of it 1920s 32 page kit brochure. Posted: Nov Sun 15, 2020 5:24 pm . Member:

https://www.youtube.com/watch?v=P2I9NYK6cJ8
I continue to explore the radio and gain familiarity with it by testing it in various ways finally discovering it's nearly working.

https://antiqueradios.com/forums//viewtopic.php?t=429838
Post subject: Lacault Ultradyne Operating Experience Solicited. Posted: Sep Sun 03, 2023 3:16 am . Member: Joined: Mar Sat 08, 2008 2:21 am Posts: 1140 Location: Hillsborough, NC 27278 I've been away a while, but am trying to get going on my L2 again.

https://www.youtube.com/watch?v=_KVFj6jqNI4
I'm on a journey to get this radio operating.

https://www.youtube.com/watch?v=VilnMmkg3qM
I'm working my way through the different stages in the radio and in this video, I investigate the 'volume control'.

https://antiqueradios.com/forums/viewtopic.php?p=1768093
Post subject: Lacault Short Wave Radio. Posted: Dec Wed 05, 2012 2:26 am . Member

https://www.youtube.com/watch?v=bQhKVLAm7Fo
I've been presented with a very unusual radio for possible restoration. Before doing anything to this radio, I need to inspect it thoroughly and assess the

https://www.youtube.com/watch?v=0ovq4arW7Jo
I continue investigating each stage in the radio. In this video, I check the volume control for a possible break in the resistance wire and investigate the