[GreenKeys] M15 How to disable unshift-on-space?

[Nick England]

A few notes -
A quick look at a typical M15 table wiring diagram shows a 3.2 amp Fusetron.
http://www.navy-radio.com/manuals/tty/15_wd_drh.pdf

Like Robert, I've seen a fair number of pieces of vintage electronics
with screw-in fuses.
The Heathkit Chippewa 1kw amplifier comes readily to mind.
http://www.radiomuseum.org/images/radio/heathkit/power_supply_ks_1_171881.jpg

Cheers,
Nick England K4NYW
www.navy-radio.com


On Sat, Sep 19, 2015 at 2:26 AM, WA5CAB--- via GreenKeys
<greenkeys at mailman.qth.net> wrote:
> Sorry.  I assumed that you knew that the ceramic screw-in fuse holder was
> original to the machine.  Like you, I doubt that the fuse was originally 6
> Amp but there is no need to replace the holder, which seemed to be what you
> were about to do.  Also, many residential fuse boxes had cheaper bakelite
> fuse sockets in them.  Those do deteriorate sometimes, but not the ceramic
> ones unless they have been under water.
>
> As to the correct (original) fuse value, I no longer have any of the dozen
> or so M15's I've owned over the years (sold the last pair of TG-7-B's about
> a month ago to Third Army) but the 3.2 Amp that someone reported does sound
> about right.  Bear in mind that the same machine might have any of about a
> dozen different motors installed, not just the synchronous 115 VAC 60 CPS
> ones in most machines running today.  For example, most of the Signal Corps
> machines had either AC or DC series governed motors with a built-in lamp for
> calibration.  A few machines had utility outlets installed.  So the motor
> wasn't the only thing that the fuse powered.
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>