The 1120 model breaks unique new ground highlighting something old – Vacuum Tubes (Röhren). This early technology launched the electronics industry in the early 20th century. In 1904, the first diode tube was invented by John Ambrose Fleming. The first effective amplifier tube (the Audion otherwise known as the triode which added the grid electrode to the plate and cathode electrodes of the diode tube) was invented in 1907 and is credited to Lee De Forest.

An FM IC block is also included so that a hybrid AM – FM receiver can be experimented with. Stereo audio is also explored (for the first time in the Lectron System) with a block which includes a 1/4″ jack as well as a mini jack.

5 tubes are included in the 1120 model with special Lectron System blocks for each tube type.

A large-sized blue case houses all four trays, the tubes, ground plate, and manual for the 1110 and 1120 models.

5 other Lectron System tube blocks (EAA91 #2473PC88 #2472PC86 #2471, PCL86 #2469, and EF98 #2470) and their tube counterparts are also available for purchase as addons to complete other experiments in the instruction manual.

The Mini loudspeaker #2711Nf verstärker #2464, and Operations verstärker #2439 are also needed for certain non-tube experiments that are profiled in the instruction manual.

Experiment #28 requires two EL95 #2459 tube blocks and tubes so an extra EL95 block with tube must be purchased.

As the 1110 and 1120 models are not extension models but rather complete standalone models, a Power Supply block #2601 must also be purchased for certain experiments shown in the manual (unless of course you already have one from other models). American and Canadian readers should remember that this block uses a 220v power transformer and will therefore need a 220v to 110v converter which Lectron, GmbH does not sell.

An additional tray holding the addons fits perfectly in the case.

The instruction manual is available for download/review here.