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As with all of our articles, we try to provide the most detailed and accurate information available.

If you have a Grebe MU-1 or MU-2 that differs from what is presented here, let me know. E-mail: WHRM GREBE SYNCHROPHASE MU-1, MU-2 INFO - Henry Rogers Nov. Grebe was born in 1895 and started in the "radio business" at a very young age.

This article will also assign a chronological order to the upgrades so the Synchrophase owner might be able to date when his radio was built from certain easily observable construction details.

By that time, the Synchrophase was already obsolete. As stated in an April 1925 QST article by Ralph Batcher, one of the Grebe designers, it wasn't so much the circuit as it was the unique, precision components that made the Synchrophase such a great performing receiver.

Grebe lost the case but was able to obtain a Neutrodyne license anyway. First were the "Binocular Coils." These were wound with Litz wire and then the RF impedance was checked to make sure all the wires of the Litz cable were correctly soldered.

The Synchrophase was born out of Broadcast Boom but was really not marketed during that period which ended around the beginning of 1924.

By mid-1924, radio buyers wanted great performance and easy operation.

He was certainly selling various pieces of equipment he built to radio amateurs prior to WWI, he supplied a "submarine receiver" to the Navy during WWI and continued on building amateur radio receivers after WWI. When Westinghouse started their commercial broadcasting station, KDKA, in November, 1920, the general public became aware that "RADIO" could be more than the dots and dashes of International Morse.

Last modified 14-Sep-2016 23:50