Several variations of Motorola boxes passed through our hands, both Motorola consumer products (including the Quasar name which was sold to Matshushita, Panasonic's parent) and Motorola C&E (Communications & Electronics), the two-way radio division for whom we were a parts dealer.
The three on your left are general replacement boxes. I remember having some that had the same design as the 3rd from your left, but green where the maroon is. The other boxes are Motorola C&E. I left the flap open on the center box so you can see the connection to the Communications division. The small box at the bottom center is properly sized relative to the others. It was just barely big enough to fit a 9 pin miniature tube (12AT7 etc). The idea was to get more in a smaller caddy.
The tubes from both divisions were always first line, but they did not make any themselves. They were made by GE, RCA, Sylvania or other top manufacturers. Tube writing on all versions were green, yellow, red or blue depending on the actual manufacturer. Date codes were standard year-week.
Below is another version from the Motorola Communications Division. It's similar to the GT style tube box above, but has a white side panel vice a black.
||Two views of same tube box. Courtesy of Mike Parent|
In the early days of replacement semi-conductors, Motorola tried to go in three directions. For consumer electronics, available via their consumer replacement parts distributors, they had the HEP line. HEP being an acronym for Hobby, Experimental & Professional. The numbering system was different than ECG's and they never adopted ECG's numbers. They did have a comprehensive cross reference in the style of ECG's with data and specs. Had one, but it went the way of the store front. Would like to find one again. Fortunately, they also printed the specs on the packaging. The HEP line never really got far off the ground.
The second venture and sort of simultaneous, but perhaps a little later than HEP was the MRO series. The MRO line was available through the Motorola industrial suppliers. MRO = Maintenance, Repair & Operations, not Mobile Radio Operations (or Organization) as it seems to mean now. This system was geared to using their regular Motorola device number to cross reference and cover generic or other manufacturer's part numbers. The cross reference, of which I still have the 1981 version, was just that. Merely a list of part numbers crossed to their MRO number, no specs or data. That info was covered in data books, not in the xref. Fortunately Motorola data is easily available on the internet now.
The third venture was the ROG or RoGo program from the mobile radio division which was called Motorola Communications & Electronics (Motorola C&E) at the time. This program was aimed specifically at the two-way radio market. Not only do they cross the ROG series to their Communications division but they also cross other radio manufacturers (EF Johnson, GE, RCA etc) to their Comm division numbers and the RoGo numbers. I have both the 1978 and 1984 cross references for this program. However, the data and specs are not listed, only the pinout and shape of the ROG/RoGo transistors is shown.
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