[GreenKeys] Current loop not providing (enough) current

[Zach Zarzycki]

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!