Re: Zoom meeting to support members who wish to start observing in hydrogen line - dates & times?

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Any Fri,Sat,Sun evenings are best for me. Thanks.

On 09/01/2024 13:00, Andrew Thornett via groups.io wrote:

Several people have now expressed interest in such meeting(s) & BAA RAG has given permission for me to go ahead and arrange it = for everyone who would like to take part please can you indicate what dates and times would suit you best for such a meeting? I work Mondays to Thursdays so those days are completely out including evenings.

It would also help if those wanting to take part emailed me on andrew@... with their preferred email address.

Andy

Re: Zoom meeting to support members who wish to start observing in hydrogen line - dates & times?

#1442

Evening is best for me, after 7pm. Weekend and weekday.?

Thanks

Patrick

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On Tue, 9 Jan 2024, 13:00 Andrew Thornett via , <andrew=[email protected]> wrote:

Several people have now expressed interest in such meeting(s) & BAA RAG has given permission for me to go ahead and arrange it = for everyone who would like to take part please can you indicate what dates and times would suit you best for such a meeting? I work Mondays to Thursdays so those days are completely out including evenings.

It would also help if those wanting to take part emailed me on andrew@... with their preferred email address.

Andy

Zoom meeting to support members who wish to start observing in hydrogen line - dates & times?

#1441

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Several people have now expressed interest in such meeting(s) & BAA RAG has given permission for me to go ahead and arrange it = for everyone who would like to take part please can you indicate what dates and times would suit you best for such a meeting? I work Mondays to Thursdays so those days are completely out including evenings.

It would also help if those wanting to take part emailed me on andrew@... with their preferred email address.

Andy

Back yard Radio Astronomy & Cherenkov Radiation muon Detector

#1440

Hi

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Radio Astronomy Section Zoom Friday the 5th Jan 2024

?

Andrew Thornett - Back yard Radio Astronomy.? & Martin Bertges - Cherenkov Radiation muon Detector

Video is now on YouTube?

?

You can find links to previous meeting videos and associated materials?

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Kind Regards

John B

Re: Interferometer using AD8302 board update

#1439

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Thanks Melvyn

?

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From: [email protected] <[email protected]> On Behalf Of melvyn.jones via groups.io
Sent: 08 January 2024 17:04
To: [email protected]
Subject: Re: [baa-rag] Interferometer using AD8302 board update

?

Hi Andrew.

Those results look good.

To understand the final test (different frequencies in the two arms of the phase detector) it is better to think of a phase detector as an RF mixer. The device will output the sum and difference frequencies, these?will be 2MHz and 2842MHz (plus many other harmonically related frequencies). ? However because of the intended use of a phase detector these high frequencies are filtered out so you don't see any output in your test.

To work it will expect to see the same frequency (1420MHz) on both arms. If you put in two signals differing by 1Hz you would see a 1Hz sine wave on the output, but this is very difficult to achieve with the stability of typical amateur signal sources.

In use, the output from the two antennas is at the same frequency and as the relative phase of the signals changes you see a change in the DC output. So to test this connect the same source to both inputs and record the dc output. Then change the length of the cable to one arm This will change the relative phase of the two signals and you should see a change in the output.?
Let us know how you get on.

Melvyn

Re: Interferometer using AD8302 board update

#1438

Hi Andrew.

Those results look good.

To understand the final test (different frequencies in the two arms of the phase detector) it is better to think of a phase detector as an RF mixer. The device will output the sum and difference frequencies, these?will be 2MHz and 2842MHz (plus many other harmonically related frequencies). ? However because of the intended use of a phase detector these high frequencies are filtered out so you don't see any output in your test.

To work it will expect to see the same frequency (1420MHz) on both arms. If you put in two signals differing by 1Hz you would see a 1Hz sine wave on the output, but this is very difficult to achieve with the stability of typical amateur signal sources.

In use, the output from the two antennas is at the same frequency and as the relative phase of the signals changes you see a change in the DC output. So to test this connect the same source to both inputs and record the dc output. Then change the length of the cable to one arm This will change the relative phase of the two signals and you should see a change in the output.?
Let us know how you get on.

Melvyn

Re: UKRAA volunteers

#1437

Many thanks to all who have responded to this call.? We will email you individually off-line this week.??
--

???? Paul Hearn? ???? ?paul@...? ???? ?RA Section Director? ???

Interferometer using AD8302 board update

#1436

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I think I'm a step towards sorting this out - new AD8302 phase comparator board. Taken much of stuck off old layout and starting as simply as possible. Found I had stabilised 5V power supply in shack - very convenient.

Labjack U3 and Radio Sky Pipe II software used for these tests and my Dell Inspiron laptop.

Started with nothing attached to either RF input not even dummy load, as per advice from Jan Lustrup (thanks Jan for your advice!) Also didn't bother with any case for these first tests.

So, firstly confirmed that both signal outputs (phase and total power) are 0.96 V or thereabouts compared to ground, consistent with the bias voltage known to be on these lines.

I then added a RF signal generator to the RF lines - used a power Splitter so same signal to both RF inputs to AD8302. Total power went up, phase stayed same.

Added Attenuator between power Splitter and AD8302 - changing attenuation changes power detected on PC.

Changing frequency from 1420MHz to 420MHz on RF signal generator made no difference.?

Now took out power Splitter and added 2nd RF signal generator to 2nd RF input on AD8302. Turning one or other of the signal generators changes total power and power on phase lines in ways I don't understand. Changing RF frequency on one of RF signal generators eg by 2MHz seems to make little or no difference. No interference fringes seen.

I don't understand the last set of findings. If anyone can help me it?would be greatly appreciated.

Andy

Sent from

Re: Zoom meeting on practical aspects of starting hydrogen line observing

#1435

I would be very interested?

Kind regards

--?

? ched

??ched@...

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On Sun, Jan 7, 2024, at 3:35 PM, Zilvinas, LY2SS wrote:

me too.

On Sun, Jan 7, 2024 at 5:28?PM Andrew Thornett via <andrew=[email protected]> wrote:
Great! Just waiting to see if anyone else is keen.
Andy

Sent from

From: [email protected] <[email protected]> on behalf of Julian Parfitt M0XPJ via <julianparfitt1=[email protected]>
Sent: Sunday, January 7, 2024 2:24:37 PM
To: [email protected] <[email protected]>
Subject: Re: [baa-rag] Zoom meeting on practical aspects of starting hydrogen line observing
?
Yes, I would be very interested.?
Kind regards,?
Julian Parfitt?

On Sat, 6 Jan 2024, 03:13 Andrew Thornett via , <andrew=[email protected]> wrote:
(As long as Andy Thomas and Paul Hearn are happy for me to run such a Zoom session), would anyone like me to run a Zoom meeting to help folks understand exactly what they need to get started in mapping the arms of the Milky Way and demonstrating dark matter in the Milky Way for themselves? (Follow my talk last night). I could discuss exactly what you need to buy and give examples with detailed description of how to put the kit together and software to use with prices and advice from my own experience.
This would be aimed at beginners with limited or no experience – an desire to get involved, around ?200-?300, and ability to wield a hammer and a drill is all that would be required!
Andy

Re: Zoom meeting on practical aspects of starting hydrogen line observing

#1434

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Please!

?

________________

Adam Rawlinson

BEng(Hons) MIET

FRAS

BAA Member

M0ZJQ

?

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From: [email protected] <[email protected]> On Behalf Of Zilvinas, LY2SS
Sent: Sunday, January 7, 2024 3:36 PM
To: [email protected]
Subject: Re: [baa-rag] Zoom meeting on practical aspects of starting hydrogen line observing

?

me too.

?

On Sun, Jan 7, 2024 at 5:28?PM Andrew Thornett via <andrew=[email protected]> wrote:

Great! Just waiting to see if anyone else is keen.
Andy
?
Sent from
From: [email protected] <[email protected]> on behalf of Julian Parfitt M0XPJ via <julianparfitt1=[email protected]>
Sent: Sunday, January 7, 2024 2:24:37 PM
To: [email protected] <[email protected]>
Subject: Re: [baa-rag] Zoom meeting on practical aspects of starting hydrogen line observing
?
Yes, I would be very interested.?
Kind regards,?
Julian Parfitt?
?
On Sat, 6 Jan 2024, 03:13 Andrew Thornett via , <andrew=[email protected]> wrote:
(As long as Andy Thomas and Paul Hearn are happy for me to run such a Zoom session), would anyone like me to run a Zoom meeting to help folks understand exactly what they need to get started in mapping the arms of the Milky Way and demonstrating dark matter in the Milky Way for themselves? (Follow my talk last night). I could discuss exactly what you need to buy and give examples with detailed description of how to put the kit together and software to use with prices and advice from my own experience.
This would be aimed at beginners with limited or no experience – an desire to get involved, around ?200-?300, and ability to wield a hammer and a drill is all that would be required!
Andy

Re: Zoom meeting on practical aspects of starting hydrogen line observing

#1433

me too.

Show quoted text

On Sun, Jan 7, 2024 at 5:28?PM Andrew Thornett via <andrew=[email protected]> wrote:

Great! Just waiting to see if anyone else is keen.

Andy

Sent from

From: [email protected] <[email protected]> on behalf of Julian Parfitt M0XPJ via <julianparfitt1=[email protected]>
Sent: Sunday, January 7, 2024 2:24:37 PM
To: [email protected] <[email protected]>
Subject: Re: [baa-rag] Zoom meeting on practical aspects of starting hydrogen line observing
?

Yes, I would be very interested.?
Kind regards,?

Julian Parfitt?

On Sat, 6 Jan 2024, 03:13 Andrew Thornett via , <andrew=[email protected]> wrote:

(As long as Andy Thomas and Paul Hearn are happy for me to run such a Zoom session), would anyone like me to run a Zoom meeting to help folks understand exactly what they need to get started in mapping the arms of the Milky Way and demonstrating dark matter in the Milky Way for themselves? (Follow my talk last night). I could discuss exactly what you need to buy and give examples with detailed description of how to put the kit together and software to use with prices and advice from my own experience.

This would be aimed at beginners with limited or no experience – an desire to get involved, around ?200-?300, and ability to wield a hammer and a drill is all that would be required!

Andy

Re: Zoom meeting on practical aspects of starting hydrogen line observing

#1432

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Great! Just waiting to see if anyone else is keen.

Andy

Sent from

Show quoted text

From: [email protected] <[email protected]> on behalf of Julian Parfitt M0XPJ via groups.io <julianparfitt1@...>
Sent: Sunday, January 7, 2024 2:24:37 PM
To: [email protected] <[email protected]>
Subject: Re: [baa-rag] Zoom meeting on practical aspects of starting hydrogen line observing

?

Yes, I would be very interested.?

Kind regards,?

Julian Parfitt?

On Sat, 6 Jan 2024, 03:13 Andrew Thornett via , <andrew=[email protected]> wrote:

(As long as Andy Thomas and Paul Hearn are happy for me to run such a Zoom session), would anyone like me to run a Zoom meeting to help folks understand exactly what they need to get started in mapping the arms of the Milky Way and demonstrating dark matter in the Milky Way for themselves? (Follow my talk last night). I could discuss exactly what you need to buy and give examples with detailed description of how to put the kit together and software to use with prices and advice from my own experience.

This would be aimed at beginners with limited or no experience – an desire to get involved, around ?200-?300, and ability to wield a hammer and a drill is all that would be required!

Andy

Re: Zoom meeting on practical aspects of starting hydrogen line observing

#1431

Yes, I would be very interested.?

Kind regards,?

Julian Parfitt?

Show quoted text

On Sat, 6 Jan 2024, 03:13 Andrew Thornett via , <andrew=[email protected]> wrote:

(As long as Andy Thomas and Paul Hearn are happy for me to run such a Zoom session), would anyone like me to run a Zoom meeting to help folks understand exactly what they need to get started in mapping the arms of the Milky Way and demonstrating dark matter in the Milky Way for themselves? (Follow my talk last night). I could discuss exactly what you need to buy and give examples with detailed description of how to put the kit together and software to use with prices and advice from my own experience.

This would be aimed at beginners with limited or no experience – an desire to get involved, around ?200-?300, and ability to wield a hammer and a drill is all that would be required!

Andy

Re: Zoom meeting on practical aspects of starting hydrogen line observing

#1430

Hi Andrew,

? ? ? ? ? ? ? ? that would be great, would be very interested!

Best,

Patrick

Ar Sath 6 Ean 2024 ag 03:13, scríobh Andrew Thornett via <andrew=[email protected]>:

Show quoted text

(As long as Andy Thomas and Paul Hearn are happy for me to run such a Zoom session), would anyone like me to run a Zoom meeting to help folks understand exactly what they need to get started in mapping the arms of the Milky Way and demonstrating dark matter in the Milky Way for themselves? (Follow my talk last night). I could discuss exactly what you need to buy and give examples with detailed description of how to put the kit together and software to use with prices and advice from my own experience.

This would be aimed at beginners with limited or no experience – an desire to get involved, around ?200-?300, and ability to wield a hammer and a drill is all that would be required!

Andy

--

Publicity and social media officer Southport AS.

Amateur radio operator G5PJK

I am a feather on the breath of God. - St. Hildegard of Bingen.

Re: Muon Pie website

#1429

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Wonderful – thanks Martin!

?

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From: [email protected] <[email protected]> On Behalf Of Martin Bertges via groups.io
Sent: 06 January 2024 09:47
To: [email protected]
Subject: Re: [baa-rag] Muon Pie website

?

Hi Andy,
I just joined the group. The website you are looking for is: .
Martin

Re: UKRAA volunteers

#1428

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Hi Paul - more than happy to help.
Best wishes
Mike

On 06/01/2024 14:55, Paul Hearn wrote:

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UKRAA is expanding its activities in 2024. We are now looking for additional volunteers.? ?If you have time and skill do get in contact with us.? We are looking for volunteers for fine mechanical assembly, soldering (not SMD) and instruments testing.? ?
--

???? Paul Hearn? ???? ?paul@...? ???? ?RA Section Director? ???

UKRAA volunteers

#1427

UKRAA is expanding its activities in 2024. We are now looking for additional volunteers.? ?If you have time and skill do get in contact with us.? We are looking for volunteers for fine mechanical assembly, soldering (not SMD) and instruments testing.? ?

--

???? Paul Hearn? ???? ?paul@...? ???? ?RA Section Director? ???

Re: Muon Pie website

#1426

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Thanks Martin

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of Martin Bertges via groups.io
Sent: 06 January 2024 09:47
To: [email protected]
Subject: Re: [baa-rag] Muon Pie website

?

Hi Andy,
I just joined the group. The website you are looking for is: .
Martin

Re: Muon Pie website

#1425

Hi Andy,
I just joined the group. The website you are looking for is: .
Martin

Re: BAA Weekend Winchester April 2024

#1424

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Hello,

??? ??? The full price usually includes all meals and accommodation in the student facilities. I have not yet booked, so thank you for a timely reminder - my favourite meeting.

John.

On 06/01/2024 03:08, Andrew Thornett via groups.io wrote:

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I have never been to this before. After the discussion y/day I am thinking of attending – I note ticket prices are quite expensive at ?275. Does this include accommodation?

Andy