[GreenKeys] eBay speed converter

Mon, 17 Nov 2003 18:51:47 +0000

Sherry,
I took a shot at bidding on the unit as soon as I saw it.
My guess is that it's based upon the UART gadget that
the hams built (the UT-4) in the 70's. 
73,
Jack WA2HWJ

> Hi All,
> 
> I was eyeing the TTY speed converter on eBay
> (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3059072113&category=
> 1502)
> 
> and wondered if any of you guys were bidding on it.  If not, I'll take a
> stab at it. If so, good luck to you!
> 
> Regards,
> Sherry Hydrick, KD7YEE 
> 
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> Sent: Monday, October 20, 2003 1:05 AM
> To: [email protected]
> Subject: GreenKeys digest, Vol 4 #269 - 1 msg
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> Today's Topics:
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>    1. Re: frequency counter (Bob Camp)
> 
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> 
> Message: 1
> Reply-To: "Bob Camp" <[email protected]>
> From: "Bob Camp" <[email protected]>
> To: <[email protected]>, <[email protected]>
> Subject: Re: [GreenKeys] frequency counter
> Date: Sun, 19 Oct 2003 18:01:51 -0400
> 
> Hi,
> 
> If you want to go the counter route rather than do it with a sound card
> here
> are a couple of ideas:
> 
>     HP 5334
>     HP 5335
>     HP 53131
>     HP 53180
> 
> The first two show up in the $60 to $120 range depending on condition,
> options, and location.
> 
> The second two are about 4X higher in price.
> 
> Why?
> 
> Well they all are what is known as a computing counter.
> 
> A normal counter running at one reading per second will tell you that
> you
> have a tone between 2000 Hz and 2001 Hz. That's a pretty slow rate and
> not a
> lot of accuracy. A piece of sound card software will do every bit as
> well.
> 
> A computing counter does some magic inside and gives you a fixed number
> of
> digits, regardless of the input frequency. Of course the slower the
> reading
> rate the more digits you get.
> 
> The earlier computing counters would give you 8 or 9 digits at a one
> reading
> per second rate. The newer stuff will give you 10 or 12 digits at the
> same
> rate.
> 
> You can set a computing counter to a 10 readings per second rate (nice
> and
> fast) and still be getting seven digits of accuracy. Your tone will read
> out
> as 2000.0015 Hz or something like that.
> 
> Of course you may not *need* to know that you are .0015 Hz off on the
> tone
> ....
> 
>     Take Care!
> 
>         Bob Camp
>         KB8TQ
> 
> 
> ----- Original Message ----- 
> From: <[email protected]>
> To: <[email protected]>
> Sent: Friday, October 17, 2003 10:48 AM
> Subject: [GreenKeys] frequency counter
> 
> 
> > I wish to soon buy a frequency counter to help set up several diffrent
> Hal
> ST-5's and ST-6's.It seems that in watching ebay there are dozens of
> diffrent counters for sale such as 80mz, 512mz, ect.Exactly what should
> I be
> looking for? I have never used a counter before, but think it would also
> be
> nice to have so I can tell where my Heath HX-10 is set to and I never
> know
> where I am on my Swan 500cWayne WB0CTE
> >
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