[GreenKeys] Are my mails getting through?

[drlegendre .]

Ok, thanks folks - sorry for the dupe-n-bother.

List must just be a little quiet, as I'm so used to receiving almost
immediate notice / reply to inquiries..

Great list, it is! =-)

-Bill

On Thu, Aug 27, 2015 at 8:44 PM, tony.podrasky <tony.podrasky at gmail.com>
wrote:

> Hi Bill;
>
> Well - I don't know for sure - but usually that is used to
> change the machine from duplex to simplex: simplex would be
> when both the keyboard and printer are in the same loop. Duplex
> would be the keyboard is in one loop and the printer in the other.
>
> I had a 28-ASR that I took the keyboard out of the loop and built
> an interface in the ST-6 so that I could talk to the ST-6 as if
> the keyboard were an in-coming signal. This allowed me to also
> talk to my SELCAL unit and switch the transmitter on and off as
> well as turn on and off reperfs and T-Ds.
>
> UE,
> K2EAA - TONY
> NNNN
> ZCZC
>
>
>
> On 08/27/2015 06:35 PM, drlegendre . wrote:
>
>> I sent the following text yesterday, and surprisingly, it met no reply.
>> Another member says it never showed up in his inbox.
>>
>> Did it make it to the list?
>>
>> -----ORIGINAL TEXT FOLLOWS----
>>
>> Howdy Gents,
>>
>> I'm just completing a scratch-build of an RS-232 / 60mA CL converter
>> device as described on this page:
>> http://www.aetherltd.com/connecting.html
>>
>> What is the purpose of the Keyboard Loopback terminals (pins 3 & 4) on
>> connector J1?
>>
>> Pin 4 is a copy of the KB output signal on Pin 5, and Pin 3 is tied
>> directly to the 120V DC supply, just downstream of the 2K 10W
>> current-limiting resistor.
>>
>> As I see it, when the converter is connected, but idle, the current loop
>> will be closed which would pull both Pins 3 & 4 down to roughly 3.3V DC
>> above ground. This is assuming a 55R selector coil. When the loop opens,
>> Pin 3 will rise to the nominal 120V DC supply, and Pin 4 will.. I don't
>> know.. float? Show some high-Z voltage?
>>
>> So what's it all about, anyway? As ever, thanks in advance - your help
>> is much appreciated.
>>
>> BTW - I used a very cheap & common 28V AC control transformer for the
>> 120V DC supply. Running a standard voltage +tripler+ gives me almost
>> exactly 120 DC with (what seems to be) very acceptable ripple at 60mA. I
>> used 3X 1000uF @ 200V caps, but I'm sure it could be executed with caps
>> of lesser value (and voltage as well). In fact, the ESR of the large
>> caps may actually be a detriment to the tripler circuit - eh?
>>
>> -Bill
>>
>>
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>> 2002-to-present greenkeys archive:
>> http://mailman.qth.net/pipermail/greenkeys/
>> 1998-to-2001 greenkeys archive:
>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
> --
> In the beginning the Universe was created.
> This has made A LOT of people very angry
> and has been widely regarded as a bad move.
>                              [from: HHGTTG]
>                              -Douglas Adams
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> 2002-to-present greenkeys archive:
> http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive:
> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20150827/bd1ae6ff/attachment.html>