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This is the Johnson Viking 4740 40 channel AM/SSB mobile rig. User features included Volume, Squelch, R.F. Gain, receive-only Fine Tuning (Clarifier), and a mode switch with colored indicator lights, which helped tell you what mode you were on in the dark. A switchable noise blanker, a P.A. switch and a standard size mobile S/RF meter, similar to the ones used by SBE, rounded out the list of operator features. Another similarity to some SBE radios was the PLL circuit, which was similar to the one used in the SBE Console V. Hmm, do you think these companies shared manufacturers (Cough.... NDI)? The PLL was capable of extra frequencies, but the VCO range was not all that great without further modification.
 
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The Gresley N2 0-6-2T Locomotives



With the completion of the final batch of Ivatt's N1 0-6-2T suburban tank, the Great Northern Railway (GNR) did not require any further suburban tank locomotives until after World War 1.
In 1919 Gresley considered a number of possible designs for a new suburban tank engine, including an improved 0-6-2T, a 2-6-2T, and a 2-6-4T.
The improved 0-6-2T was accepted for development, although it is interesting to note that Gresley would later design a 2-6-2T (V1) and his successor, Thompson, would design a 2-6-4T (L1) both for heavier suburban and branch work.
The new design was based on the N1, but featured larger diameter cylinders, piston valves, a superheated boiler, and a greater water capacity.
The piston valves were positioned above the cylinders, requiring a high-pitched boiler.
This combined with a short chimney to keep the locomotive with the Metropolitan loading gauge, gave the N2s a powerful appearance.
Sixty locomotives were built between 1920 and 1921, and these were followed by forty-seven Group Standard N2s between 1925 and 1929.
Although initially built for suburban services in the Kings Cross area.
 
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GNR class N2/1 0-6-2T No 4758 heads away from New Southgate with a New Barnet train in 1936.
Photo: Colling Turner/Rail Archive Stephenson
 
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