[GreenKeys] Connecting 28 ASR to a TU

[Pete Lancashire]

Please make sure the unit it adequately oiled before using it.



On Wed, Oct 11, 2017 at 8:37 AM, <tokens at myranch.com> wrote:

> I recently acquired a 28 ASR  and have it working locally. Problem is
> getting it to copy off the air. I obtained two TUs with hopes that they
> would be in working condition. One is a Hal ST-6 and the other is a Hal
> ST-5000. The ST-6 was kit built with modifications. It arrived with all the
> boards rattling in the box. When I opened the chassis every board was
> loose. The ST-5000 looks as if it is brand new. It arrived in its original
> box with all the original cables and connectors waiting to be made up. My
> assumption is that with either one of these TUs if I fed in a rtty signal I
> should see deflection on the meter. I have tried itty from the internet
> connecting to the line out of the computer and I have tried rtty off the
> air connecting to the line out of the receiver. In both cases I see no sign
> of meter movement with either TU. I know there is a signal being fed into
> the TUs as I can connect to a separate scope and see the deflections with
> the signal. At this point I don’t know if I have two dysfunctional TUs or
> whether I am trying to use them incorrectly.
>
> Any help would be welcomed.
>
> Thank you.
>
> 73,
> Al W8KHP
>
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