[GreenKeys] Distortion Testing of my AN/FGC-25

[Don Sentz via GreenKeys]

Hi Jeff,

these links you sent to me are just what I needed to see. Thank you so much! I am going to  get that burnishing tool. The application note that you linked to is very informative and reassuring, that the effect I am seeing is  likely to be expected.

The set is working fine the way I am using it. I was primarily concerned that there might be some latent problem that should be addressed and repaired. After I do the re-cleaning and burnishing I will retest the signals. It may be a few weeks before I can accomplish this.

Also, if I want to try some radio teletype, then I was concerned that the glitches would degrade the quality of the FSK or AFSK signal. 

thanks again for responding and advising, I really appreciate it,
-73,
-Don

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On Sat, 7/4/15, Jeffrey D Angus <jdangus at att.net> wrote:

 Subject: Re: [GreenKeys] Distortion Testing of my AN/FGC-25
 To: greenkeys at mailman.qth.net
 Date: Saturday, July 4, 2015, 10:02 AM
 
 On 7/4/2015 11:43 AM, Don
 Sentz via GreenKeys wrote:
 > Thank you
 for your feedback about the glitches.
 <http://www.vetco.net/catalog/product_info.php?manufacturers_id=22&products_id=12021>
 And a better view of it:
 <http://www.vetco.net/catalog/images/GC-9337-3.jpg>
 
 The problem is, ALL mechanical
 contacts tend to bounce a little bit.
 Notably from open to closed (space to mark).
 Hence the suggestion
 of adding a
 "de-bouncing" circuit between the mechanical
 contacts
 and any solid state inputs.
 
 Some thoughts on contact
 bounce:
 <http://pdfserv.maximintegrated.com/en/an/AN764.pdf>
 
 
 -- 
 Jeff-1.0
 wa6fwi
 http://www.foxsmercantile.com