The Fine Things are Always Hand Made

Old attempt at converting laueate to receive 88 to 108 Fm band

I am working on a Laureate chassis I got from Kent King using parts from a Laureate damaged in shipment. Any way In comparing the RF section from both chassis one to the other I noticed the coils from the rf coils are different. Specifically the FM section is altered. I first thought maybe it is a later revision. However the size of the coils looked odd, too small! I pulled the 1232 FM rf tube and connected my probe to the grid and injected a RF signal to the FM terminals. I found out it is tuned to 85 MHZ with tuning gang closed! The conversion is a work in progress since it has no coupling from the plate to mixer grid. its missing the plate winding over the mixer coil. It has Hartley oscillator coil but it is missing the grid connection. It looks like I have a lot work to do to roll everything back to original. Well did have have to work on the RF section anyway as the broadcast coils (mixer,oscillator) are damaged.

Anyone want the FM coils and try to convert an Laureate,phantom or philharmonic to receive the FM band on a "prewar" FM band?

bob

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Permalink Reply by Kent King on July 30, 2024 at 9:22am

Interesting....that might be a cool thing to try, but Laureate chassis are pretty scarce. I have an unrestored chassis of my own (no cabinet), I suppose I could try it. Would be a technical challenge...