The antenna connection goes to the rotor of the condenser. The set is plenty sensitive with a Hard Detector but I gather Tuska was after DX ing performance. I assumed the set was designed to use all type 201 (1Amp) tubes, but maybe Tuska intended a 200 in the detector (soft 1 Amp) and 201A (1/4 Amp) in the audio's. I had been running the set on a 6 volt battery for filaments. I did measure the condenser and no resistance (open) on my meter. I also read in the discussion about not using a Grid-Leak, noting the 225 has the "Grid Condenser" made by Tuska but no resistor. I also had 860 higher up on the tuning dial on a different tap, so there is overlap. I like the clockwise increase but would rather have the numbering the other direction. Regeneration starts immediately at 90 and gets too loud by 70. I am turning the Regeneration clockwise and in the picture, it is at about 75. In my pic I have it playing 860 kHz sitting on Tap 3, the tuning condenser about midway. I believe the movable contact is connected to ground. The main coil on the 225 is cylindrical and has 6 taps to the points on the front panel. It starts at low regen being at 90 degrees sideways to the main coil. The Rotor is ball shaped which is inferred in the schematic in the article. I notice a couple of things relating to my type 225 which unfortunately is not the Super version. Later, his company (and Armstrong license) was bought by Atwater Kent. In 1923, he co-developed the "Superdyne" modification to the regen technology, which resulted in your radio. However, as a commercial enterprise this would negate his amateur status, and would require his stepping down as a League officer. His new company was awarded a license from Armstrong for the regenerative circuit. Tuska company in 1920 marketing educational kits, but the 20's radio boom proved irresistible. He was by this time head of his household, supporting his mother and grandmother. During WWI, amateur transmitting was suspended (and as Tuska received a commission as Lieutenant in the Signal Corps, so was the magazine)Īfter the war, Maxim rebooted the ARRL by selling bonds, and with some of the funds the League bought QST from Tuska, who then pursued his interest in manufacturing. Both the League and magazine are still active today. The following year (1915), he wanted to better coordinate the efforts of the league, so with advice from his uncle he founded the league magazine "QST". Later that spring, another club member, Hiram Maxim proposed the organization of radio amateurs to form relays so messages could go beyond their transmitting range, and the Amateur Radio Relay League (ARRL) was incorporated, with Maxim as president and Tuska as secretary (Tuska was still in his teens). Shortly after the government stepped in with regulation of transmitters with the Radio Act of 1912, Tuska got one of the earliest licenses (1WD) and the following January helped form the Hartford Radio Club. He was born in 1896, and got interested in wireless at an early age, building homebrew sets for himself and others before he was a teenager. 2021:Ĭlarence Tuska was an interesting guy, in case you are interested in the history attached to your radio. I posted the following summary about Clarence Tuska in an ARF discussion of a 228 Superdyne set back in Feb. Spent all day Christmas listening to Mexican Christmas music on 860 AM. ![]() ![]() This set is a three tube receiver, tunes the AM broadcast, band, is more than plenty loud through a horn speaker. The regeneration control has smooth engagement, with plenty of space before you hit oscillator status.Īs I research the history of Tuska the man, he was big in ARRL and published QST magazine, Tuska was in the group that was making for sale to the public, Regenerative receivers up until 1923 - 24 when the Superhet and RCA dominated. This is the most sensitive, loudest playing, Regen I have played with. I believe one of Armstrongs patent drawing shows a detector without a grid leak resistor. There is an item labeled Tuska Grid Condenser and I see no Grid-Leak resistor unless something is in the above component. Tuska apparently made all the parts as they all say TUSKA. The set came with good 01A's and I an guessing it was designed for 1 Amp tubes. Any reception was due to the coil acting as a loop antenna. The rotar just happens to be the antenna input. I found the tuning condenser should have had some spacers as the mounting screws pulled it tight to the panel and shorted the condenser rotar to the shield which is grounded. ![]() It did work but with limited reception and lots of squealing and howling. There was a small group of Regen's on eBay earlier this month that qualify for the 100 year old radio club and this Tuska was among the group. My partner gave me a nifty Tuska Regenerative Receiver type 225 for a Christmas present.
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