UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Coax cable

MotorBikeLes · 29th Nov 2018, 11:08 pm

Regarding the balanced twin, I recall seeing American antenna stuff always referred to as 300 ohm.
However my first CTV, a NordMende 2245 (F2 chassis) back in 1970 had a balanced twin aerial input clearly marked 240 ohms.
Their earlier FM radios had balance twin for FM, I think also marked 240 ohms. Big connectors then, but smaller "DIN" types on the TV and later (1967) FM radios.
I have seen various twin cables, probably intended to be 300 ohms on far eastern sourced stuff, since there was always a USA input even if decades previously. Definitely different to some white plastic twin that was sourced in Germany in 1970.
Les.

29th Nov 2018, 11:08 pm	#20
MotorBikeLes Nonode Join Date: Dec 2012 Location: Kirk Michael, Isle of Man Posts: 2,350	Re: Coax cable - When did it begin? Regarding the balanced twin, I recall seeing American antenna stuff always referred to as 300 ohm. However my first CTV, a NordMende 2245 (F2 chassis) back in 1970 had a balanced twin aerial input clearly marked 240 ohms. Their earlier FM radios had balance twin for FM, I think also marked 240 ohms. Big connectors then, but smaller "DIN" types on the TV and later (1967) FM radios. I have seen various twin cables, probably intended to be 300 ohms on far eastern sourced stuff, since there was always a USA input even if decades previously. Definitely different to some white plastic twin that was sourced in Germany in 1970. Les.