• Country
• Germany

• Manufacturer / Brand
• Samson, Margot; Osburg

• Year
• 1974–1977

• Category
• Morse-Equipment & TTY, RTTY, TDD etc.

• Radiomuseum.org ID
• 96013

• • Brand: ETM

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• 4

• Semiconductors
• BC238 MPS-A92 BC308 BC238

• Wave bands
• - without

• Power type and voltage
• Dry Batteries / 4 x 1,5 (AA) Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Squeeze Keyer ETM-3C - Samson, Margot; Osburg

• Shape
• Tablemodel, with any shape - general.

• Notes

• Vollautomatische elektronische Zweihebel-Morsetaste (Squeeze-Prinzip) mit Tastrelais-Ausgang in Reed-Technik und eingebautem Mithörton.

  Ausführung in CMOS-Schaltung (ETM-3C).

  Bestückung mit 6 C-MOS-Bausteinen:

  3 x 74HCT00
  2 x 74HCT73
  1 x 74HCT02

  Die Version mit eingebautem Netzteil nennt sich ETM-3b.

• Net weight (2.2 lb = 1 kg)
• 1.5 kg / 3 lb 4.9 oz (3.304 lb)

• Mentioned in
• Gregor Ulsamer, Faszination Morsetasten, Emden 2001

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 19 models, 17 with images and 18 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Samson, Margot; Osburg