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LCWO Discussion Forum [Atom LCWO Forum Feed]

This is a simple discussion forum for LCWO users. Feel free to use it for any kind of discussion related to this website.

Thread: etm-8c keyer and left-hand operator

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AuthorText


Posted: 2020-05-27 04:32
Hi, i'm a left-hand operator, dash at right and dot at left side. Just bought a second hand samson etm-8c electronic keyer (cmos). The user guide does not mention how to configure the keyer for left-hand. Can somone help me?
Thanks
Manu
on4em


Posted: 2020-05-27 12:06

The printed circuit board has sockets for the IC's
Of IC 4 in the circuit pin 10 and 11 must be interchanged. Can be done by bending the pins outside and sonnect them with thin wires soldered on them.

May be as another possibility you can cut the PC traces to the key and interchange them by wire soldered on the traces.

It is probably easier to use your etm8-c upside down.


There is a manual with circuit diagram available on
https://www.dl0bn.de/dc7xj/Anleitungen/ETM-8C%20Manual.pdf



Posted: 2020-05-27 19:44
on4em:
Hi, i'm a left-hand operator, dash at right and dot at left side. Just bought a second hand samson etm-8c electronic keyer (cmos). The user guide does not mention how to configure the keyer for left-hand. Can somone help me?
Thanks
Manu
on4em



I though most people made up a swap over patch lead with in-line 3.5 mm socket, which also allows visits and return visits to/from other shacks.

Maybe not . . .


Posted: 2020-05-28 08:44
Hi HH, thanks for the information.
I found a way by interchanging the wires coming out of the circuit board and going to the metal case hosting the paddles. Those wires are terminated by jumpers plugged close the IC's, that was easy to find. I missed the 2' observations HI. 73 Manu on4em


Posted: 2020-05-28 17:12
According to this... https://nababalao.wordpress.com/2020/02/12/samson-etm-9c-x3-memory-keyer/

If you send the keyer a command RV, it will reverse the dot and dash.

This thing is very reminiscent of the "CMOS Super Keyer" that I built, based on a QST article, back in the early 90s.



Posted: 2020-05-28 19:04
edgreenberg:
According to this... https://nababalao.wordpress.com/2020/02/12/samson-etm-9c-x3-memory-keyer/

If you send the keyer a command RV, it will reverse the dot and dash.

This thing is very reminiscent of the "CMOS Super Keyer" that I built, based on a QST article, back in the early 90s.




That's the 9c - must have been time for a leap forwards in ergonomics.

I bought a picokeyer+ kit. All good fun anyway.

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