Re: Oscilloscope Collection / Junky
Dynamco 7200. A very niece little portable scope, with 7 x 5 screen, to 15 Mhz.
Manual is dated 1969. Also appears as Post Office type 14A, with dual trace, twin TB. Priced in March 1973 at £435 for single TB, and £485 for twin TB. Particularly good small Brimar tube with mesh pda; D10-210, or GEC/MOV 974W.
Geoff_n asks about the power connector. It is a 6 pin Bulgin type P427 chassis male socket, for mains (A= line, B = neutral, C= earth) and from the add-on DC converter (D = AC,E = earth, F = AC, being 24-0-24V or so at 80Hz). Pins are usually marked, but they go from A in order, counting clockwise from the indent, looking onto the P428 cable female plug. A quick check with the ohmmeter will confirm. A to B, via the fuse and on/off switch to the transformer primary. Changing the mains setting 110/250 will change the resistance. C and E to chassis. D & F go to the secondary windings on the transformer, part of the winding which feeds the 20V bridge rectifier for the +-20V rails. Bill m0wpn
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