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Glad this thread is still active. I still have two B&K 415's (one for performing 44 MHz IF alignments, plus a "spare" to modify for 24 MHz once someone with more RF circuit design background develops a set of modification plans to follow), so I'm still following the thread. It's a shame that the dial drives used in the Eico 368 and 369 weren't as precise as those used in the Philco 7008. A unit combining the all-electronic sweep system of the Eico 368 with the post-marker upgrade I described earlier and dial precision equivalent to that of the Philco 7008 would be the ideal instrument.
I have heard good things about an instrument used by Dumont for RF/IF alignment in a Production environment called a "Wobbulator" and have heard that the unit was factory-configured to Dumont receivers' standard marker frequencies as used circa 1947 (21.9 MHz Audio IF, 26.4 MHz Video IF) via front-panel "pushbutton" presets. Rumor has it that the unit was dubbed "model 1200A" and that Stromberg-Carlson may have been involved in its development or production. The unit is also mentioned by name in the Alignment instructions provided in technical literature published by J. F. Rider for several Dumont receivers of the time. In addition, I have noted that Rider manuals for Dumont receivers (particularly for the RA-103D and RA-104A) provided more information than was included in the Sams folders for the corresponding models regarding the Mallory Inductuner units.
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