[GreenKeys] XR2211 demodulator circuit boards?

Sun Jan 24 13:12:37 EST 2021

Dang, thought you might be volunteering John!  It's the part that isn't
automatic that won't fit the schedule right now!

Steve G./N4TTY
-----Original Message-----
From: John, W9DDD <w9ddd at tapr.org> 
Sent: Sunday, January 24, 2021 12:34 PM
To: N4TTY at ARRL.NET; Green Keys <greenkeys at mailman.qth.net>
Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?

Not volunteering, but there are CAD programs that can take an image
(e.g.jpeg), import it and create gerbers.  Not automatically, you need to
place pads and traces over the imported image that is a layer behind the
active layer.

John, W9DDD

On 1/24/2021 11:18 AM, Steve Garrison wrote:
> Well, right now I wouldn't be able to tackle that.  That is why I sent the
note to Eric about the Gerber files.  Those I might be able to squeeze in
with a shoehorn.
> 
> Steve G./N4TTY0
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net 
> <greenkeys-bounces at mailman.qth.net> On Behalf Of Don Cunningam
> Sent: Sunday, January 24, 2021 9:53 AM
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?
> 
> Steve,
> 
> I have a set of boards (TU and power supply) that was sold by a company
called PEMCO, if my old memory is correct for the ST-5A which was Irv Hoff's
ST-5 with autostart added.  I would donate them if you think you have
somewhere that could duplicate them so others could build that.  I also have
the old Hoff articles from an early QST that talks about tuning toroid coils
and if followed on this TU, it is nearly as good as the HAL ST-6 was!!!  If
that cant be done, Eric you can have these boards and I'll dig up some
toroids to build it.  I don't have a TON of the toroids, but I have some
left from MANY years of building TU's for Navy MARS folks back in the 70's,
I found this set of Pemco boards and info for sale and bought it a few years
back to share with someone.  If you can do this, Steve, let me know and I'll
ship the boards to you.
> 
> 73,
> 
> Don, WB5HAK
> 
> On 1/24/2021 4:31 AM, Steve Garrison wrote:
>> Eric,
>>
>> If you wouldn't mind sending the gerber files or any other files I'd 
>> appreciate it.  I've been having several other boards that I have 
>> designed for robot project I'm involved with made, so I could add the 
>> demod board to the list.  Is the 2211 still readily available?
>>
>> Steve G./N4TTY
>>
>> -----Original Message-----
>> From: greenkeys-bounces at mailman.qth.net 
>> <greenkeys-bounces at mailman.qth.net>
>> On Behalf Of epvgk at limpoc.com
>> Sent: Sunday, January 24, 2021 3:58 AM
>> To: hwhall at compuserve.com
>> Cc: greenkeys at mailman.qth.net
>> Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?
>>
>> On Sun, Jan 24, 2021 at 08:46:10AM +0000, hwhall at compuserve.com wrote:
>>> I'd encountered some of those pages when I was googling but still no 
>>> PCB
>> artwork. If someone has already laid them out, I could skip reinventing
it.
>>> WayneWB4OGM
>> Here's the one I did that got manufactured that people on the list 
>> have a bunch of.
>>
>> https://www.heepy.net/index.php/RTTY_demodulator_using_NJM2211
>>
>> I can dig up gerbers or whatever if you want!
>>
>> eric
>>
>>> -----Original Message-----
>>> From: Harold Hallikainen <harold at w6iwi.org>
>>> To: greenkeys at mailman.qth.net
>>> Sent: Sat, Jan 23, 2021 11:19 pm
>>> Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?
>>>
>>>
>>>> Are there any printed circuit boards for building an XR2211 based 
>>>> RTTY demodulator? Â Google shows me all kinds of articles from 
>>>> complex to over-simplified but doesn't lead me to any PCB artwork 
>>>> or
>> vendors.
>>>> I'm thinking I might build a demod to run a Model 15 from a laptop 
>>>> running MMTTY. The program only outputs tones (no on-off output to 
>>>> key a loop
>>>> directly) so a PLL demod should be fine since noise won't be an 
>>>> issue. Or should I look at something even smaller/simpler?
>>>> Thanks!WayneWB4OGM_________________________________________________
>>>> _
>>>> ____________
>>> There's an evaluation board at
>>> https://media.digikey.com/pdf/Data%20Sheets/MaxLinear%20PDFs/XR-2206
>>> -
>>> 1 1-12_Man.pdf . I'd be tempted to wire wrap it, though.
>>>
>>> Several products I did using the XR2211 are at
>>>
>>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/2013041612
>>> 5
>>> 3
>>> 39_Part5.pdf
>>>
>>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/Harold_018.
>>> p
>>> df
>>>
>>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/2013041612
>>> 5
>>> 3
>>> 39_Part1.pdf
>>>
>>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/Harold_011.
>>> p
>>> df
>>>
>>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/2013041612
>>> 5
>>> 5
>>> 53.pdf#page=11
>>>
>>> The XR2211 is a fun chip. Before that, I used the NE565, but the
>>> XR2211 includes the data comparator, a carrier detect, etc. The
>>> XR2206 is also a nice chip. It will generate a square wave, triangle 
>>> wave, and
>> sine waves.
>>> It can do linear FM, AM (including double sideband suppressed 
>>> carrier), and FSK. The FSK circuit has a logic input that switches 
>>> between two timing resistors. But, during the transition, the 
>>> frequency goes to zero for a very short time. I'd probably use the 
>>> linear FM circuit and drive it with the data after running it 
>>> through a low pass filter to limit bandwidth. It IS a nice chip, 
>>> though. I used it as an upconverter (local oscillator and mixer) to 
>>> upconvert subcarriers on FM broadcast stations to
>>> 455 kHz where the signal then went through ceramic filters, IF 
>>> amplifier, and a ceramic discriminator.
>>>
>>> Fun stuff!
>>>
>>> Harold
>>> https://w6iwi.org
>>>
>>>
>>> --
>>> FCC Rules Updated Daily at http://www.hallikainen.com Not sent from 
>>> an iPhone.
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>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch 2002-to-present greenkeys archive:
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>>> This list hosted by: http://www.qsl.net Please help support this 
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>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch 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
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>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch 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 Message delivered to 
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>>
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>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch 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 
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> 
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> 
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>> https://teletype.net/gksearch 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 
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> 
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: 
>>>> https://teletype.net/gksearch 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
> 
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