[Milsurplus] Millen Antenna Matching Preamp 92101

[Hubert Miller]

Unless I'm mistaken, in recent history someone here was asking after additional coils for the Millen Antenna Preamp 92101.
The usually installed plugin is 27 - 32 Mcs. The lower and higher frequency plugins seem uncommon.

There is a DYI project article in GE Ham News, Nov. - Dec. 1946, seen here:
https://worldradiohistory.com/Archive-Company-Publications/GE-Ham-News/GE-Ham-News-1946-Vol-01-No-4.pdf

The James Millen 92101 manual is at
http://www.30j.ca/manuals/JamesMillen/AntennaMatchingPreamp.pdf

The Millen is the better circuit as the band broadening resistors are in the plugin assembly, not in the unit, so they can be tailored
to the band. Also the Millen's two small caps on top the tuning caps are 10 pF while the GE uses 5 pF. There is a follow up article in
GE Ham News for Jan. - Feb. 1947 which corrects their circuit to more like the Millen. You could maybe delete the resistors for maximum
gain but needing more frequent retuning.

Yes, none of the above is revelatory. I found in my papers I'm getting rid of, the 1947 GE Ham news with the project update article,
then, remembering I have 2 of the units, decided to look up the circuit. I don't know if I'm going to keep either. I'm puzzling whether
I can invent a use for them for me. It also occurred to me that the 6AK5 could be easily replaced with a DGMOSFET with the gain control to
gate2 and then run the thing off a 9 volt battery.
-Hue Miller
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