[GreenKeys] Fwd: ASR33 suddenly fails to send data -- Please relay

[Chris Elmquist]

Forwarding for a friend who has been unable to join the list successfully.

We've already discussed possible missing loop current on his TX loop
but that does not seem to be the problem.  I was pretty certain that
when in local mode, it is basically looping the Tx loop to the Rx loop
so that proves out a lot of stuff...

Chris N0JCF

----- Forwarded message from Scott G Taylor <bub7734 at yahoo.com> -----

> My ASR33 suddenly stopped transmitting.  It receives fine over the 20ma loop,
> but the send loop sends nothing.
> 
> The machine works fine in local mode, but when in line mode the keyboard and
> tape reader both mechanically cycle, but no data is sent.  It's effectively
> an RO unit right now.
> 
> Is there something obvious I'm overlooking?  I'm really unfamiliar with the
> circuitry inside.  Is it possible the single printed-circuit card in there has
> failed and I should replace that?   I just don't see anything obvious to suspect
> other than that card, since the rest of the machine is electro-mechanical (and
> because it operates fine in local mode).
> 
> On an unrelated note... Have anyone heard of or seen an M33 that had
> 8 line-per-inch vertical spacing?   I'll be darned if I have something odd here.
> The vertical spacing on this unit is exactly 8 LPI, and I can't find any reference
> to such a capability anywhere.  It is really a true 8LPI; the ratcheting on the platen
> is well-seated, and there's no play or otherwise mechanical malfunction to
> be causing this.  All documentation specifically state only 6 LPI (single-spacing).
> 
> Please respond on-list, as I'm unable to get subscribed.
> 
> For reference, my email is: bub7734 @ yahoo.
> 
> Cheers,
> -scott

----- End forwarded message -----

-- 
Chris Elmquist