[GreenKeys] HAL ST-6000 help needed

[Bob Camp]

Hi

Be a little careful when hooking up magnets and keyboards in series on 
a machine like a 28. On the 15 the keyboard contacts were rated to 
switch loop current directly. It may have been a bit hard on them but 
they would do it without obvious damage occurring. On a 28's I have 
seen the keyboard contacts are not rated for high voltage inductive 
switching. The magnets are driven off of a separate tube or transistor 
based driver.

	Take Care!

		Bob Camp
		KB8TQ



On Apr 29, 2005, at 10:57 AM, Roy Morgan wrote:

> At 07:35 PM 4/28/2005, Greg Miller wrote:
>> Hello all,
>>    I'm trying to get a Hal ST-6000 up and running.... when I try to 
>> send with the 28 and the 6000, ... the 6000 shifts to space (I think) 
>> and just sits there.  Also, the TTY free-runs.
>
>
> Greg,
>
> I have a newly acquired ST-6000 here but have not gotten it fully 
> hooked up yet.  (It is in ok shape and running right, though.)  I know 
> only a little about it, but there is a "programming plug" on the back, 
> maybe called the "Accessory Plug".  It's the biggest one with most 
> contacts. That thing has to have the right jumpers installed for the 
> mode of operation you intend (e.g. "Loop Sense" enabled).
>
>>   BTW, I've already replaced all of the electrolytic and tantalum 
>> caps (I've had a lot of bad experiences with tantalums!)
>
> Did you get one in backwards??
>
>>    Could the 28 have a problem?
>
> As I understand it, the 28's keyboard and printer need to be in series 
> for the ST-6000 loop sense feature to work.  It senses loop signals 
> that are *not* generated in the ST-6000 and switches modes from 
> receiver (drive the printer with loop current) to send (sense the loop 
> current and make AFSK and logic signals for transmitting.)  Getting 
> the 28 set up right may be as simple as putting the ASR's switch in 
> the correct position, or similar with a KSR.
>
> I'll be glad to  hear what you find out, since I expect to be running 
> my 28 KSR's here with the ST-6000.
>
> Roy
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Cell 301-928-7794
> Work: Voice: 301-975-3254,  Fax: 301-948-6213
> roy.morgan at nist.gov --
>
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