NEED INFO ON HEATH KEYER SA5010

[Dale Putnam]

Hi John, 
  I have been following along, as I have just gotten mine working too. But for the memory shortage, and I have been thinking about the possiblity of using it for some of the older tx that I have too... one which shows the need for the buffer circuit. Or... isn't there a mod for a reed relay mod for this keyer? 
thank you, 

--... ...-- Dale - WC7S in Wy


 
> Date: Mon, 20 Sep 2010 12:29:32 -0500
> From: lhouseparker at LIVINGSTON.NET
> Subject: Re: NEED INFO ON HEATH KEYER SA5010
> To: HEATH at LISTS.TEMPE.GOV
> 
> k2sse wrote:
> > Hi John
> > Great info from you as there are NO Paddles to be had and I will take 
> > your advice and use an external paddle key although I'm hoping to use it 
> > with a Cw Beacon.
> > Also there are NO Batteries so I will keep the unit powered up.
> > Thank you 73 Al
> 
> Hi Al.
> If you want to try the capacitive paddles I can send you an E-Mail
> with a JPG picture attached showing their size and shape. Each of
> the 2 is just a sort of L-shaped flat piece of aluminum about 3/32"
> thick (a hair less than 3 mm), so you could make your own out of
> aluminum or brass stock. The total length is 2-5/8", of which about
> 7/8" at the bottom makes the 9/32" tall (7 mm) narrow prong that
> slides into to the 2 slots at the front edge of the keyer. The
> prong widens out to make the paddle, about 1.5" long by 1" tall,
> like this:
> 
> 1-7/16"
> ___________
> | \
> 1" | \
> | \ 7/8"
> |__________ \________
> \____________| 7 mm
> 1-1/8" 1-5/16"
> 
> The tips of the 7 mm tall prongs should be tapered a bit":
> _________
> \
> |
> _________/
> 
> A bit steeper than that, like a blunt arrowhead.
> 
> There should be a big 3" x 3.5" label on the bottom of the keyer
> with brief instructions for the various settings. Some are not
> very descriptive, you need to read the manual. You may find that
> the speed settings entered via the keypad are not accurate:
> to get a real 20 wpm I have to set it at 23-24 wpm.
> 
> The 4 adjustment holes in the bottom are a bit small to see what
> you're doing, so I drilled mine out to about 1/4" diameter;
> however, this is not worth doing if you can turn the pots OK with
> a small screwdriver.
> 
> If you ever do open the case, take extreme precautions with tools
> and fingers to eliminate static electricity. If you can avoid it,
> don't open it at all.
> 
> If you decide to put batteries in it, they are 3 A76 or S76 type
> in series in a holder by the speaker, positive side toward the
> orange wire. Silver oxide batteries last longer than alkalines.
> The same anti-static precautions apply.
> 
> If you plug regular paddles into the rear you can reverse which
> paddle is for dots or dashes by turning over the plug, and
> presumably also by simultaneously pressing the LOAD SEND buttons
> on the keypad.
> 
> The memory holds only 240 characters (see page 54 in the manual
> for instructions, and word spaces are also characters) if it's a
> later model. As I mentioned previously, early models had a circuit
> error that cut that in half, so try yours and see. I also said
> that Heathkit didn't publish a field fix, but now that I've stirred
> the musty brain cells I recall that if asked they did send out a
> fix that involved moving one disk cap (C4). Let me know if you run
> into that problem and I'll send the details.
> 
> If you have occasion to need high current from the negative keying
> output for an older xmtr, you'll need to add an outboard
> one-transistor buffer circuit to handle it. Let me know if you
> need a diagram.
> 
> 73
> John KE5ZB
> 
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