[hpsdr] PennyLane CW Transmission Configuration

[Mark Leone]

Thanks to George for setting me straight on the term I used in the post 
below. What I called Phono connectors are actually Phone connectors. For 
the HPSDR circuit, I have the 1/4" phone connectors only- no adapting to 
mini or sub-mini.

Mark - K4XML

On 12/21/11 1:24 PM, Mark Leone wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Thanks to Joe and Dan for off-list suggestions on my CW transmit 
> problem. I made some progress, but I'm still not all the way there. I 
> think my issue is that assumptions I've made about how phono cables, 
> jacks, and plugs are wired are incorrect. I need to ring out the 
> entire circuit and see how these things are wired, as I was just 
> ringing out the cable I fabricated, and making apparently wrong 
> assumptions about the phono cables and connectors. It'll be a couple 
> weeks before I can get to this, so I'll post back when I do.
>
> In the mean-time, here's a more detailed description of my setup, in 
> case anyone has any ideas off the cuff.
>
> I have a Key and Paddle working with a Kenwood TS-570. They are each 
> connected to a cable that terminate in a phono plug (mono for the Key, 
> Stereo for the Paddle). I wanted to keep the phono connections for use 
> with the Kenwood, so I made a DB-9 to Phono jack adapter cable, 
> connecting pin 5 to sleeve, pin 6 to tip, and pin 7 to ring.
>
> When I plug this adapter cable alone into Metis, nothing happens 
> (which is good). But when I plug the Key or Paddle cable into the 
> adapter cable, PennyLane starts transmitting (if PTT is not disabled). 
> Well I also have some extension cables from the Key/Paddle to the DB-9 
> adapter cable. I think they were labeled as Microphone extension 
> cables. When I take these out of the circuit, the paddle works 
> properly when plugged directly into the adapter cable. But when I plug 
> the key in directly, I get the same problem (always transmitting).
>
> So I need to ring these extension cables out and see what they're 
> doing; but it's strange that they don't interfere when used with the 
> Kenwood. I also need to ring out the circuit when the Key is connected 
> to the DB-9 adapter cable. I assumed that with my setup I would short 
> the ground to either Dot or Dash pin when I keyed down, which should 
> work if Iambic is de-selected. But apparently the circuit doesn't 
> connect the way I think it does. I get a constant tone (without 
> keying) when I have Iambic de-selected, and I get a stream of Dits 
> (without keying) when I have Iambic selected. In either case, there is 
> no change when I key down.
>
> Mark - K4XML
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