[GreenKeys] Current loop not providing (enough) current

[Zach Zarzycki]

Removed resistor no change. The magnet is sort of working. If I push
it toward the coil, it closes and doesn't open until I press a key or
hit break. I think thats reverse. It's sort of like the magnet is
always energized and only a keypress breaks the loop, instead of the
keypress energizing the magnet. I've tried flipping polarity, I have
it hooked up just like I showed here minus the resistor
https://i.imgur.com/KYAiy42.jpg and key presses register on the
computer still, but typing on the computer and typing on the teletype
doesn't cause the key to press. Best way I can describe what is
happening is everything feels backward.

Here is a video that might better show what I'm seeing is here - maybe
someone else can see something I'm not. https://youtu.be/CbZMtXkXz4w

On Fri, Sep 27, 2019 at 8:52 AM Zach Zarzycki
<shardsofaperture at gmail.com> wrote:
>
> Well, I think as it was suggested, a resistor may be the culprit.
> There is a resistor that one the one schematic is labeled as "Station
> Line Resistor" with a note "when required". This is on the line relay
> - switch control two wire line or line to grnd diagram. This is NOT
> how I am wiring this thing up as I don't believe it is necessary for a
> single unit, and involves equipment I don't have.  I've highlighted
> the resistor in this photo - https://i.imgur.com/QOAsNqX.jpg and the
> position of the resistor matches up on my unit here >
> https://i.imgur.com/Kk8LU8i.jpg . The parts diagram shows it as a 5k
> or 1050 ohm resistor  https://i.imgur.com/TXwsVbi.jpg (highlighted
> yellow).
>
> I believe I need to remove the resistor and hook everything up like
> this > https://i.imgur.com/KYAiy42.jpg where the loop is in red, the
> resistor in question needs removed from the spot in the drawing from
> contact 26 to the sending contacts (yellow), this diagram is the
> "Local Attended TWX Service, no line relay switchboard" diagram.
>
> I'm not sure what a station line resistor is, can anyone confirm this
> is safe to remove? Worth a shot?
>
>
> On Fri, Sep 27, 2019 at 7:21 AM Zach Zarzycki
> <shardsofaperture at gmail.com> wrote:
> >
> > So there was a little operator error here, therefore, Jordan, I really don't think the board is bad. I didn't swap my lead on the meter from v to ma (amperage , ma are separate ports, then volts, ohms, temp, diodes and caps on another port).
> >
> > I have 60mA at the supply, between the 2 points it hooks to the PC interface and therefore at the terminal hookups on the teletype. between two windings down the loop on unit itself it reads 53mA, and at 2 other windings 0.
> >
> > The break key and any strike does break the loop. Now it's a matter of figuring out why the machine itself / magnet won't energize.
> >
> >
> > I'm going though the schematic again to see if coils are supposed to be  in parallel or series with the way I have the loop hooked in - thinking about what Ralph had said with regard to reversed coils.
> >
> > Ralph,  Ohio, and yeah, 40 is 2 far and my hf setup right now is awful, antenna down and what not!