[GreenKeys] More 28 reperf hammer head photos

[Nick England]

I added a dimensioned sketch of the hammer lever to the head sketch -
reload the image if you need to
http://www.navy-radio.com/tty/lpr-hammer/lpr-head-sketch.jpg
A photo of the hammer lever is here
http://www.navy-radio.com/tty/lpr-hammer/lpr-hammer.jpg

If the 3D printing doesn't work out. John Poulton and I have discussed a
way to make a mold.
http://www.navy-radio.com/tty/lpr-hammer/lpr-mold-v01.jpg

I made a very crude mold just holding a couple of pieces of metal together
while pouring in goop from a hot glue gun to surround a hammer lever. After
cooling I trimmed the goop with a razor blade.
http://www.navy-radio.com/tty/lpr-hammer/lpr-head-test-1.jpg
I have installed this test head in an LPR for testing, only to find out
this LPR won't print anything but nulls- so yet another repair project! The
selector levers are selecting but the transfer levers ain't
transferring.....
http://www.navy-radio.com/tty/lpr-hammer/lpr-head-test-2.jpg

To fit the test head, I followed Mark's lead about pulling the hammer lever
and ribbon guide out the back side of the LPR.
http://www.navy-radio.com/tty/lpr-hammer/lpr-lever-rear.jpg
http://www.navy-radio.com/tty/lpr-hammer/lpr-lever.jpg

That was a somewhat painful process, but I just couldn't imagine taking off
the faceplate to get at the hammer - particularly because this LPR has a
powered backspace mechanism.
http://www.navy-radio.com/tty/lpr-hammer/lpr-faceplate.jpg

LPR disassembly/reassembly jobs run the gamut from insanely difficult to
impossible...
Once we have some heads that work, we'll need a YouTube video showing how
to fit it.

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


On Tue, Jan 14, 2020 at 10:11 AM Nick England <navy.radio at gmail.com> wrote:

> Head dimensions
> http://www.navy-radio.com/tty/lpr-hammer/lpr-head-sketch.jpg
>
> I’ll make a sketch of the lever too.
> Nick
>
>
> On Tue, Jan 14, 2020 at 10:05 AM ken Schwieker <ksweek at mindspring.com>
> wrote:
>
>> Great photos. I for one would like to have the measurements of the metal
>> part the sleeve fits
>> on and another set of measurements for the sleeve as a double check. The
>> hole appears to be
>> not centered in the sleeve in one direction which I don't see noted
>> anywhere. This info would be
>> appreciated by me and probable anyone else that wanted to take a stab at
>> making the part
>>
>
> Ken
>>
> --
> Nick England K4NYW
> www.navy-radio.com
>
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