[ARC5] Ideas on Japanese circuit ?

[Hubert Miller]

Subject: Re: [ARC5] Ideas on Japanese circuit ?

>Hi Hue,
I am not sure if this is the correct schematic for what you have.  Does it look right?
This does not show the filament connections but from similar sets, it looks like the filaments are all wired in parallel.
Tom
>N3AJA

HEY, thanks a whole lot !! This is a GREAT addition to what i have, which is an nth generation copy of a Japanese original.
The one you sent is an EEIS or Naval Intelligence drawn schematic, and drawn in a more straightforward orderly fashion
than my copy of the original. PLUS it has the parts values, which are mostly illegible on mine. Plus it identifies the B+ and
negative bias voltages, which i would have had to guess at. I did note one error right off the bat: no sidetone feed is shown.
The original i have shows the connectors cables and power units, so putting the two together gets me farther. BTW, the 
Japanese original seems to have an error also; the antenna terminals XMTR ANT and REC ANT are exchanged. Hey, 
proofreader ! The only reason i can think that the low voltage winding feeds the keying relay and mic current and pilot
lamp is that pilot lamp indicates dynamotor spinning alright; also this allows either + or - ground power aircraft power supply. 
Better they should have used 12 or 24 volts supply anyway, rather than 6. Would have saved metal for armoring their
planes better.
-Hue Miller