7603: Difference between revisions

The '''AN/USM 281C''' is a ruggedized 7603 without readout (was also known as 7603N Option 11S) that includes two AM-6565 ([[7A15AN11]]) single-trace amplifiers, a TD-1085 ([[7B53AN11]]) dual time base, and a clip-on front panel cover with probes and accessories.

Due to the long production time of the 7603 many options were available. As some options became standard (e.g. built-in fan) some numbers where assigned twice. Later models were equipped with an IEC socket, making all A''x'' options obsolete.

The 7603 was made in various versions for many years, with revisions to some subassemblies like the vertical output amplifier and HV circuits. It uses a linear power supply, a fan is optional. CRT deflection plates are not distributed. The vertical output amplifier is built around a [[155-0080-00]] hybrid (U450). Other custom Tek ICs used include [[155-0011-00]] clock & chop blanking (U55), [[155-0022-00]] vertical channel switch (U214), [[155-0022-00]] trigger channel switch (U324),and the [[7000 series readout system]] chips.   

There was an [[Media:040-0686-01.pdf|official Tek modification to add pushbutton illumination for plugins]], which involves adding a regulator, but there is also a quick'n'dirty method from Rolynn Prechtl: