Betr: Re: Shape of ladderfilter easy to measure
Hi Chris, I am very busy with the QRL on the moment but I hope to put them in the picture box within two weeks. 73's, Ruud -- Oorspronkelijk bericht --
To: BITX20@...
From: "vdberghak" <vdberghak@...>
Date: Mon, 13 Dec 2004 18:31:45 -0000
Subject: [BITX20] Re: Shape of ladderfilter easy to measure
Reply-To: BITX20@...
Hi Ruud,
stupid to do this in the English language as we are both Dutch ;-)
A nice thing of the program is that you can save the result of a
measurement and display both. Then the change is clearly visible.
I measured also the shape of my FT290 rig and it looked much flatter.
Can you post the shape of both filter curves to me (or place them in
a 'Photos' or 'Files' directory)? I would like to have an idea of
the original 10MHz filter compared with my 4,9 MHz filter.
Thanks in advance,
Chris.
--- In BITX20@..., "Ruud Jongeling" <pe2bs@t...> wrote:
--- In BITX20@..., "vdberghak" <vdberghak@z...> wrote:
Hi Chris, Thank you for your message. I just tried the program to get a
shape
of my ladder filter. I put a noise-source in the input. With the
average in the program on 100 you can even see what happens to the
shape of the filter when you change the C's in it. I got a better
shape by changing some.
73's
Ruud (PE2BS)
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Re: Shape of ladderfilter easy to measure
Hi Ruud, stupid to do this in the English language as we are both Dutch ;-) A nice thing of the program is that you can save the result of a measurement and display both. Then the change is clearly visible. I measured also the shape of my FT290 rig and it looked much flatter. Can you post the shape of both filter curves to me (or place them in a 'Photos' or 'Files' directory)? I would like to have an idea of the original 10MHz filter compared with my 4,9 MHz filter. Thanks in advance, Chris. --- In BITX20@..., "Ruud Jongeling" <pe2bs@t...> wrote:
--- In BITX20@..., "vdberghak" <vdberghak@z...> wrote:
Hi Chris, Thank you for your message. I just tried the program to get a
shape of my ladder filter. I put a noise-source in the input. With the
average in the program on 100 you can even see what happens to the
shape of the filter when you change the C's in it. I got a better
shape by changing some.
73's
Ruud (PE2BS)
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Re: Shape of ladderfilter easy to measure
--- In BITX20@..., "vdberghak" <vdberghak@z...> wrote: Hi Chris, Thank you for your message. I just tried the program to get a shape of my ladder filter. I put a noise-source in the input. With the average in the program on 100 you can even see what happens to the shape of the filter when you change the C's in it. I got a better shape by changing some. 73's Ruud (PE2BS) Hi all,
I found a very easy to use tool to measure the shape of the x-tal
filter.
The programm is small and the only needed hardware is your PC and a
cable with two resistors to connect the LF output of the transceiver to the input of the soundcard of the PC.
There are different ways to measure: just receive the noise and
choose an 'slow avarage', for example with a frequency span from 0 - 5000Hz (then every devision is 500Hz).
An other possibility is to choose 'maximum hold' and tune slowly over a received carrier.
I did this with my BITX17, the screendump is placed in the BITX17
directory in 'Photos'.
The result of this measurement is that I saw I had to shift the BFO
frequency because the passband starts at 500Hz (and I wanted to start it at about 250Hz).
I would like to see results of the 10MHz ladderfilter, just to
compare with mine 4,9MHz filter.
Please post your message as soon as you have uploaded the picture.
Best regards,
Chris.
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Shape of ladderfilter easy to measure
Hi all,
I found a very easy to use tool to measure the shape of the x-tal
filter.
The programm is small and the only needed hardware is your PC and a
cable with two resistors to connect the LF output of the transceiver
to the input of the soundcard of the PC.
There are different ways to measure: just receive the noise and
choose an 'slow avarage', for example with a frequency span from 0 -
5000Hz (then every devision is 500Hz).
An other possibility is to choose 'maximum hold' and tune slowly over
a received carrier.
I did this with my BITX17, the screendump is placed in the BITX17
directory in 'Photos'.
The result of this measurement is that I saw I had to shift the BFO
frequency because the passband starts at 500Hz (and I wanted to start
it at about 250Hz).
I would like to see results of the 10MHz ladderfilter, just to
compare with mine 4,9MHz filter.
Please post your message as soon as you have uploaded the picture.
Best regards,
Chris.
|
Hi BITX20 Builders,
I have just included a section on my website of the BITX20. For
those who may be contemplating building a vfo stabilizer based on
the EI9GQ design, I have included the source code I used. Code is
for various IF frequencies (8.0 and 9.0 MHz)as well as two MCU's
(16F84 and the 16F628) The code can be easily changed for other IF's
such as 4.1592 or 10.0 MHz.
Here is a link to the website:
For those that have built this radio I know you are enjoying many FB
QSO's
73's
Pete W6JFR
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Re: New article about DECIMAL freq. counter.
Dear K7HKL Arv,
Start from this month, I do not have much time as before to make a project,
since I have to work & move to another town and back home at weekend.
Sure I will continue my BITX soon as possible, this is my first trx, I 'll
find the best time to do it.
Thank's for you attention.
Yours,
Milarepa
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----- Original Message ----- From: "Arv Evans" <arvevans@...> To: "BITX" <bitx20@...> Sent: Saturday, November 13, 2004 1:45 AM Subject: Re: [BITX20] New article about DECIMAL freq. counter. | MILAREPA | | There are also articles on simple frequency counters on Hans G0UPL and | Miguel PY2OHH web sites. | | | | | How is work on your BITX going? Is it on the air yet? | | Arv K7HKL
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Re: New article about DECIMAL freq. counter.
MILAREPA
There are also articles on simple frequency counters on Hans G0UPL and Miguel PY2OHH web sites.
???????
???????
How is work on your BITX going?? Is it on the air yet?
Arv K7HKL
_._
On Fri, 2004-11-12 at 02:18, MILAREPA wrote:
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Hello,
There is a new article about simple frequency counter,
at PA2OHH site, "BINARY DECIMAL LED DISPLAY VERSIONS
OF THE SIMPLE FREQUENCY COUNTER "
'Probably' suit to your BITX.
Click here
Yours,
MILAREPA
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Re: New article about DECIMAL freq. counter.
Yes, sorry Miguel. No wonder it didn't work for me the first time!
73 Hans G0UPL
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-----Original Message----- From: Miguel Angelo Bartie [mailto:py2ohh@...] Sent: 12 November 2004 12:44 To: BITX20@... Subject: [BITX20] Re: New article about DECIMAL freq. counter. Hi Hans ... Hi Guys ! I am always listening the messages of this group... back the wall ... hi ! Note that the correct adress of my page is you forget the ".br" .... 73 from PY2OHH Miguel --- In BITX20@..., Hans Summers <Hans.Summers@t...> wrote:
Note that PA2OHH's pages are also mirrored on Geocities. It is much
faster than qsl.net but it does suffer from advertisements. See:
Other related pages are my own simple frequency counter:
and also the similar designs my Miguel PY2OHH, see but
unfortunately Miguel's page appears to have broken links right now.
72/3 Hans G0UPL
-----Original Message-----
From: MILAREPA [mailto:MILAREPA@T...]
Sent: 12 November 2004 09:18
To: BITX20@...
Subject: [BITX20] New article about DECIMAL freq. counter.
Hello,
There is a new article about simple frequency counter,
at PA2OHH site, "BINARY DECIMAL LED DISPLAY VERSIONS
OF THE SIMPLE FREQUENCY COUNTER "
'Probably' suit to your BITX.
Click here
Yours,
MILAREPA
Yahoo! Groups Links Yahoo! Groups Links
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Re: New article about DECIMAL freq. counter.
Hi Hans ... Hi Guys ! I am always listening the messages of this group... back the wall ... hi ! Note that the correct adress of my page is you forget the ".br" .... 73 from PY2OHH Miguel --- In BITX20@..., Hans Summers <Hans.Summers@t...> wrote:
Note that PA2OHH's pages are also mirrored on Geocities. It is much
faster than qsl.net but it does suffer from advertisements. See:
Other related pages are my own simple frequency counter:
and also the similar designs my Miguel PY2OHH, see but
unfortunately Miguel's page appears to have broken links right now.
72/3 Hans G0UPL
-----Original Message-----
From: MILAREPA [mailto:MILAREPA@T...]
Sent: 12 November 2004 09:18
To: BITX20@...
Subject: [BITX20] New article about DECIMAL freq. counter.
Hello,
There is a new article about simple frequency counter,
at PA2OHH site, "BINARY DECIMAL LED DISPLAY VERSIONS
OF THE SIMPLE FREQUENCY COUNTER "
'Probably' suit to your BITX.
Click here
Yours,
MILAREPA
Yahoo! Groups Links
|
New article about DECIMAL freq. counter.
Hello,
There is a new article about simple frequency counter,
at PA2OHH site, "BINARY DECIMAL LED DISPLAY VERSIONS
OF THE SIMPLE FREQUENCY COUNTER "
'Probably' suit to your BITX.
Click here
Yours,
MILAREPA
|
Re: New article about DECIMAL freq. counter.
Note that PA2OHH's pages are also mirrored on Geocities. It is much faster
than qsl.net but it does suffer from advertisements. See:
Other related pages are my own simple frequency counter:
and also the similar
designs my Miguel PY2OHH, see but
unfortunately Miguel's page appears to have broken links right now.
72/3 Hans G0UPL
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Show quoted text
-----Original Message-----
From: MILAREPA [mailto:MILAREPA@...]
Sent: 12 November 2004 09:18
To: BITX20@...
Subject: [BITX20] New article about DECIMAL freq. counter.
Hello,
There is a new article about simple frequency counter,
at PA2OHH site, "BINARY DECIMAL LED DISPLAY VERSIONS
OF THE SIMPLE FREQUENCY COUNTER "
'Probably' suit to your BITX.
Click here
Yours,
MILAREPA
Yahoo! Groups Links
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Many thanks to Farhan, Arv K7HKL and John G0UCP for your suggestions on what
to do with my linear amp. As soon as I have time on the workbench I will try
your suggestions.
73 Hans G0UPL
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Re: Huff & Puff VFO Stabiliser Forum on Yahoo
On Tue, 2004-11-02 at 22:55, W5RCM - Ron wrote:
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The link listed below pulls up the group, but searching the Yahoo Groups
list still won't find it.
I've had other problems the last 2 days with trying to update some
subscriptions to other yahoo groups.? mailman.qth.net is behaving
normally, so I don't think it's on my end.
--
72, Ron - W5RCM
w5rcm at volente dot us
Austin TX
Hans Summers wrote:
> But here is the URL to the group:
>
>
>
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Re: Huff & Puff VFO Stabiliser Forum on Yahoo
I have investigated the new group's configuration options and I couldn't see
any reason why it wouldn't appear in the Yahoo group search results. I have
written an email to customer support. I received an automated reply based on
search words in my question, that was entirely useless but did advise that
if it didn't help, I should reply to the mail. Seemingly it takes many
iterations before you can actually get an email through to a human!
73 Hans G0UPL
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-----Original Message----- From: W5RCM - Ron [mailto:w5rcm@...] Sent: 03 November 2004 05:55 To: BITX20@... Subject: Re: [BITX20] Huff & Puff VFO Stabiliser Forum on Yahoo The link listed below pulls up the group, but searching the Yahoo Groups list still won't find it. I've had other problems the last 2 days with trying to update some subscriptions to other yahoo groups. mailman.qth.net is behaving normally, so I don't think it's on my end. -- 72, Ron - W5RCM w5rcm at volente dot us Austin TX Hans Summers wrote: But here is the URL to the group:
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Re: Huff & Puff VFO Stabiliser Forum on Yahoo
The link listed below pulls up the group, but searching the Yahoo Groups list still won't find it.
I've had other problems the last 2 days with trying to update some subscriptions to other yahoo groups. mailman.qth.net is behaving normally, so I don't think it's on my end.
--
72, Ron - W5RCM
w5rcm at volente dot us
Austin TX
Hans Summers wrote:
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But here is the URL to the group:
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Re: Huff & Puff VFO (for information)
Pete
Pictures of your BITX with the digital dial are one of the items that started us thinking about the possibilities of a minimalist approach to designing a general purpose Huff & Puff and digital dial for BITX and other similar QRP rigs.?? Hans has quite a bit of experience with minimalist frequency counters and has also built his own huff& puff stabiliser (see...Hans has even got me spelling 'stabiliser' with an s instead of the US way as 'stabilizer'!).
Our goal is to be uP free by doing all the work in CMOS ICs.? The objective is to keep the cost, complexity, and technical requirements to a minimum.? I think this fits with the BITX philosophy of using only readily available (i.e. discrete or surplus/junkbox) parts.
Thanks,
Arv K7HKL
_._
On Tue, 2004-11-02 at 19:43, kaliediscope2004 wrote:
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Look in the Photo Section under W6JFR and you will see my BITX20
with a Huff & Puff type VFO based on EI9GQ's work. This one uses the
PIC16F628 versus the original PIC16F84. Look under EI9GQ's website
for details on his approach.
My IF is 9.0 MHz but the EI9GQ code can be easily changed for other
IF frequencies.
Having the digital display AND vfo stabilizer gives the BITX20 a big
boost!
73's
Pete W6JFR
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Re: Huff & Puff VFO Stabiliser Forum on Yahoo
Tim, & others
Sorry for the confusion.? I put in too many upper-case letters.? 8-(
Try this URL:
?????????? HuffPuffVFO-subscribe@...
Thanks,
Arv K7HKL
_._
On Tue, 2004-11-02 at 13:09, Tim Ostley wrote:
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Arv,
Yahoo groups didn't seem to know about HUFFPUFFVFO when I tried to join.
A search for HUFFPUFFVFO, HUFF and VFO also failed to elicit a response.
Any thoughts?
72s
Tim Ostley M0CZP
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Huff & Puff VFO (for information)
Look in the Photo Section under W6JFR and you will see my BITX20
with a Huff & Puff type VFO based on EI9GQ's work. This one uses the
PIC16F628 versus the original PIC16F84. Look under EI9GQ's website
for details on his approach.
My IF is 9.0 MHz but the EI9GQ code can be easily changed for other
IF frequencies.
Having the digital display AND vfo stabilizer gives the BITX20 a big
boost!
73's
Pete W6JFR
|
Re: Huff & Puff VFO Stabiliser Forum on Yahoo
Ted
I have no idea who George Huff is!
I do not know why it isn't being found in the search, I will have to
investigate later.
But here is the URL to the group:
Note that like this BITX20 group, I have set it to require moderator
approval for new members, so we can keep spammers out. Arv and I are
moderating the Huff Puff group.
73 Hans G0UPL
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-----Original Message----- From: Ted Kell <tedkell@...> To: BITX20@... <BITX20@...> Sent: Wed Nov 03 02:17:48 2004 Subject: Re: [BITX20] Huff & Puff VFO Stabiliser Forum on Yahoo I looked for huffpuffvfo, huff (lots of hits, who is george huff?) and vfo. Case doesn't seem to matter, I found nothing. N3Ted 11/2/2004 3:07:15 PM, Hans Summers <Hans.Summers@...> wrote:
Tim, I wonder if the group name is case
sensitive? I later changed it to HuffPuffVFO, try that. Another possibility is that I set it to be hidden by mistake, I don't know. If the case- correct version doesn't help I'll investigate tomorrow
73
Hans G0UPL
-----Original Message-----
From: Tim Ostley <timostley@...> To: BITX20@... <BITX20 @yahoogroups.com> Sent: Tue Nov 02 20:09:10 2004
Subject: Re: [BITX20] Huff & Puff VFO Stabiliser Forum on Yahoo
Arv,
Yahoo groups didn't seem to know about
HUFFPUFFVFO when I tried to join. A search for HUFFPUFFVFO, HUFF and VFO also failed to elicit a response.
Any thoughts?
72s
Tim Ostley M0CZP
Yahoo! Groups Links
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