Date   

Re: Tactics in microwave contest with very few planes.

Phil Guttridge G3TCU
 

OK Nick,

I'll meep you well ahead of expected plane times (assuming there are some!)

If it's clear, I expect to be calling CQ on 1296.245

73, Phil.

On 19/05/2020 10:42, Nick Gregory G0HIK via groups.io wrote:
Hi Phil,

Thanks that would be good if we could try, with Pete North of me and you south, these will be great tests :)

My locator is IO84JE65WK.

I dont use KST2me, I'll  take a look at it for next time. But I will keep a close eye on KST for meeps, it's so easy to miss them.

Ring or mail me if you want to disscuss further.

Nick G0HIK 

Virus-free. www.avg.com


Re: Tactics in microwave contest with very few planes.

Nick Gregory G0HIK
 

Hi Phil,

Thanks that would be good if we could try, with Pete North of me and you south, these will be great tests :)

My locator is IO84JE65WK.

I dont use KST2me, I'll  take a look at it for next time. But I will keep a close eye on KST for meeps, it's so easy to miss them.

Ring or mail me if you want to disscuss further.

Nick G0HIK 


Re: Tactics in microwave contest with very few planes.

Nick Gregory G0HIK
 

Thanks very much Pete,

I also have the central Lake district fells in that direction, but they are in the distance so could be a good direction for me to try.

The 9700 is pretty much on frequency. 

My little notepad has not got the speed to handle Airscout unfortunately, so I'll be reliant on you although I can watch Flight Radar 24 on my phone app.

Do you want to message me on KST, I'll keep a close watch on it for "Meeps".

My email in nickg0hik@..., if you want to talk further.

Nick G0HIK

  

That is great, my locator is IO84JE65WK.


Passive Relay's

Nick Gregory G0HIK
 

Living in a valley, I've been interested in using a passive relay and have talked about them several times over the years with local amateurs.

When I was working, on one of the sites we had tanks that were refurbished WWII fuel dumps with chambers underground. To enable the UHF radios to work we had a folded dipole in the chamber with LDF4-50 feeding and 18 ele jaybeam. This gave comms back to the control room (Less than a mile).

While working on the rigs, we had a blind spot, I installed a system with two folded dipoles back to back. This was not perfect, but was a great improvement.

As I walk on the Fells around here there, I often come across community TV repeaters. They are always been powered, not sure if they are simply a pre-amplifier or they frequency shift.

I have been told that you cant have the passive repeater anywhere near the middle of the link and has to be right at one end of it. Not sure how the logic works, as several of the communities fed by these are not that close to them, say up to 2 to 5 miles away.

Finding a site locally that I could use that is on a hill and secure was a problem. But recently a radio friend who lives the other side of the valley, around 5 miles away said I could install one on the roof of his shack for me to try out. I was thinking of 144MHz because I was talking about this with another chap in the club whom I would like to communicate with who has Two metres. But it could be any band, maybe 23cm's might be a good one to try out.

Nick G0HIK

 


Re: N-type (5/8" 24tpi UNEF) die?

John Lemay
 

Neil

 

This thread (awful pun) has raised a question in my mind; I have a die marked “ 5/8 24 UNS”. It fits an N type thread, but is it the same ? Googling has not provided much clarity.

 

John G4ZTR

 

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Neil Smith G4DBN
Sent: 19 May 2020 09:45
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] N-type (5/8" 24tpi UNEF) die?

 

I have one Ian, email me your address and I'll get it in the post

Neil G4DBN

On 19/05/2020 09:35, Ian White wrote:

Does anyone have an N-type die (5/8in x 24tpi UNEF) that I could borrow by post, please, for literally 5 minutes?

 


Re: Tactics in microwave contest with very few planes.

Phil Guttridge G3TCU
 

Hi Nick,
 
Can you give me an 8 (or 10) character LOC and I'll set up an Airscout alarm path to you tonight. I don't find the waterfall much help with AS QSOs as the path mostly opens and closes quickly.
As most large planes are cargo flights heading roughly E-W these days, they cross the path, rather than flying along it, so the 'opening' can be very short, so overs need to be extremely brief.

Do you use KST2me? 'Raw' KST usually has too much latency for arranging AS skeds. And I find a display dedicated to KST2me is useful, otherwise I can easily miss meeps.
Having said that, I'm just as guilty as everyone else at not responding to meeps sometimes. If I'm trying to complete a 'good Dx' QSO at very weak signal levels, I can't type a reply at the same time.

My home QTH system on 23cm is 250W to a 44 ele

73, Phil G3TCU

IO91QE43DL



On 19/05/2020 09:50, Nick Gregory G0HIK via groups.io wrote:
I've not had an A/S QSO yet and I'm still going to be on the drive in the van this evening with limited computing power.

Do you need a waterfall to be able to use a this mode?

Does it just give you more time, i.e. you can see it before you can hear it ?

I'm still not sure of the mechanics of setting this up in a contest. If anyone is going to try this tonight and want IO84 please let me know, I'll be on KST and 07955635646.

10w and 1.2mtr dish

Nick G0HIK

Virus-free. www.avg.com


Re: N-type (5/8" 24tpi UNEF) die?

Ian White
 

Thanks, Neil.

73 from Ian GM3SEK

On 19/05/2020 09:44, Neil Smith G4DBN wrote:

I have one Ian, email me your address and I'll get it in the post

Neil G4DBN

On 19/05/2020 09:35, Ian White wrote:

Does anyone have an N-type die (5/8in x 24tpi UNEF) that I could borrow by post, please, for literally 5 minutes?



Re: Scatterpoint Activity column

Paul Randall G3NJV
 

Hi, I intend to mix down to 2m and bought a  TOKO 5HW-73050A-735 filter off eBay for 3 quid to give the mixer a better chance.

What mixers are you guys planning to use? 


Paul


Sent from my Samsung Galaxy smartphone.



-------- Original message --------
From: "John E. Beech" <john@...>
Date: 18/05/2020 22:26 (GMT+00:00)
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Scatterpoint Activity column

Tnx fer that Andy. In that case I might try a very simple Schottky diode mixer for starters. I've got a series of 3dB, 6 dB & 10 dB BNC attenuators I can clag in to see how much I need & then build a dedicated attenuator.

de John G8SEQ

>  -------Original Message-------
>  From: Andy G4JNT <andy.g4jnt@...>
>  To: UK Microwaves groups.io <UKMicrowaves@groups.io>
>  Subject: Re: [UKMicrowaves] Scatterpoint Activity column
>  Sent: May 18 '20 18:46

>  The output of any LNB is so high you'll need attenuation rather than
>  gain
>  The broadband noise output over the complete IF band from 600MHz to
>  2GHz or so is so high, it can run into compression in some mixers.
>  DBMs shpuld be OK, but the I/Q downconverter I used to get to 28MHz
>  required at least 10dB attenuation of the 739MHz input to stay
>  comfortably in the linear region.

>  Don't forget image filtering if you use a simple mixer - otherwise you
>  throw away 3dB S/N on every signal you hear

>  Andy
www.g4jnt.com

>  On Mon, 18 May 2020 at 17:57, John E. Beech <john@...> wrote:

>  > Hi John,
>  > I don't know if this is of any interest, but while I have been
>  > trying to revive my SSB electronics L 23 S TVTR, my brain went into
>  > overdrive. Having recently bought a NanoVNA, I now have an easily
>  > programmable LO with which to make a simpler SDR for QO-100. My LNB
>  > puts out 739 MHz. By injecting 739 MHz into a suitable mixer ( ie a
>  > copy of the Rx mixer in the L 23 S, I down convert the 739 MHz to
>  > baseband to use with some existing software I have.
>  > But there are more questions than answers. Will I need any
>  > amplification/filtering at 739 MHz before the mixer or will it have
>  > sufficient gain? Should I put an audio buffer amplifier between the
>  > mixer and the sound card input. Has anyone already done this or am I
>  > barking up the wrong tree?
>  >
>  > de John G8SEQ
>  >
>  >> -------Original Message-------
>  >> From: John Worsnop <johnworsnop@...>
>  >> To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>  >> Subject: [UKMicrowaves] Scatterpoint Activity column
>  >> Sent: May 18 '20 17:45
>  >>
>  >> GE All,
>  >> I've had no contributions for the Scatterpoint activity news this
>  >> month so far, so it'll be "The G4BAO report" unless I get
>  > something
>  >> before lunchtime Wednesday.
>  >>
>  >> Doing anything interesting? made any out of the ordinary QSOs?
>  >> switched the rig on instead of checking the web for activity? had
>  > a
>  >> QSO that didn't involve exchanging "59007 IO92WI" ?
>  >>
>  >> ;-)
>  >>
>  >> Send it to me at the above address before Wednesday Lunchtime and
>  > the
>  >> UKuG will put your name in lights............
>  >>
>  >> 73
>  >> John
>  >>
>  >>






Re: Tactics in microwave contest with very few planes.

Pete - GM4BYF
 

We can try tonight Nick if there is a suitable plane. 100W and 55 element. Could you give your full locator as the Pentland hills intrude on anything west of south. However I have had successful contacts using A/S even over the hills.

I am in IO85 JV (southern edge of Edinburgh) What is important in A/S is to be very sure of your frequency. Also to have Air Scout installed and working. Very short calls at 5- 10 second intervals.  And no wasting time in the qso. SSB much better than cw unless you are really fast. (I am not). I don't find a waterfall helpful, but others might.

73
Pete GM4BYF
On 19/05/20 09:50, Nick Gregory G0HIK via groups.io wrote:

I've not had an A/S QSO yet and I'm still going to be on the drive in the van this evening with limited computing power.

Do you need a waterfall to be able to use a this mode?

Does it just give you more time, i.e. you can see it before you can hear it ?

I'm still not sure of the mechanics of setting this up in a contest. If anyone is going to try this tonight and want IO84 please let me know, I'll be on KST and 07955635646.

10w and 1.2mtr dish

Nick G0HIK

--
vry 73
Pete GM4BYF


Re: Tactics in microwave contest with very few planes.

Nick Gregory G0HIK
 

I've not had an A/S QSO yet and I'm still going to be on the drive in the van this evening with limited computing power.

Do you need a waterfall to be able to use a this mode?

Does it just give you more time, i.e. you can see it before you can hear it ?

I'm still not sure of the mechanics of setting this up in a contest. If anyone is going to try this tonight and want IO84 please let me know, I'll be on KST and 07955635646.

10w and 1.2mtr dish

Nick G0HIK


Re: Stacking frames

Pete - GM4BYF
 

Important at those frequencies to ensure that any conducting frame does not intrude on the line of the elements.

For a stack of four, this is easy to do provided you invert one antenna and then get the phasing correct. Been there and got it wrong !!

73
Pete GM4BYF
On 18/05/20 20:39, Robin Szemeti wrote:

Aluminium every time.


On Mon, 18 May 2020 at 19:51, chris ruddy via groups.io <mm0kos=yahoo.co.uk@groups.io> wrote:
Hi All

just a quick question, would you build your stacking frames from Aluminium of Carbon Fibre for 23 and 13cm

Thanks Chris


--
Best regards,

Robin Szemeti

Redpoint Consulting Limited 

E: robin@... 
T: +44 (0) 1299 405028 
M: +44 (0) 7971 883371 

CONFIDENTIALITY NOTICE 
The information contained in this e-mail is intended only for the
confidential use of the above named recipient. If you are not the
intended recipient or person responsible for delivering it to the
intended recipient, you have received this communication in error 
and must not distribute or copy it. 
Please accept the sender's apologies, notify the sender immediately 
by return e-mail and delete this communication. 

Thank you. 

--
vry 73
Pete GM4BYF


Re: N-type (5/8" 24tpi UNEF) die?

Neil Smith G4DBN
 

I have one Ian, email me your address and I'll get it in the post

Neil G4DBN

On 19/05/2020 09:35, Ian White wrote:

Does anyone have an N-type die (5/8in x 24tpi UNEF) that I could borrow by post, please, for literally 5 minutes?



N-type (5/8" 24tpi UNEF) die?

Ian White
 

Does anyone have an N-type die (5/8in x 24tpi UNEF) that I could borrow by post, please, for literally 5 minutes?

73 from Ian GM3SEK


Re: Chris & Andy please......

david656179
 

Chris and Andy (and others),

Just keep doing what you do for our hobby, both of you are/were professionals in your working lives and we have benefited greatly.  I am retired now and the last thing I want to do is remember or get involved with my former profession in any way, I did enjoy working, but it is past,  you both are being very generous.

I often do not understand the complex maths and get stuck all the time, I am an analogue kind of chappie.  Yet I have, to my surprise, engaged with some of the new data modes and still read things about fractional synthesizers and so on, one day I might get something  to stick.  There is just so much to do and enjoy and we must progress, at least be aware of the possibilities, whilst still enjoy the "old technologies".  By way of example, I am currently engaging with the outstanding 6m SpE openings, magic band for sure.  So much to learn on just this one topic and great fun at the same time.

David 


Re: Scatterpoint Activity column

John E. Beech
 

I'll let you know how it pans out. From Andy's comments I might be able to use a much simpler scheme. It won't have the best S/N ratio but it should be good enough to hear the louder stations on QO-100

de John G8SEQ

-------Original Message-------
From: John Worsnop <johnworsnop@gmail.com>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Scatterpoint Activity column
Sent: May 18 '20 18:12

Thanks John, that's great

On Mon, 18 May 2020 at 17:57, John E. Beech <john@g8seq.com> wrote:

> Hi John,
> I don't know if this is of any interest, but while I have been
> trying to revive my SSB electronics L 23 S TVTR, my brain went into
> overdrive. Having recently bought a NanoVNA, I now have an easily
> programmable LO with which to make a simpler SDR for QO-100. My LNB
> puts out 739 MHz. By injecting 739 MHz into a suitable mixer ( ie a
> copy of the Rx mixer in the L 23 S, I down convert the 739 MHz to
> baseband to use with some existing software I have.
> But there are more questions than answers. Will I need any
> amplification/filtering at 739 MHz before the mixer or will it have
> sufficient gain? Should I put an audio buffer amplifier between the
> mixer and the sound card input. Has anyone already done this or am I
> barking up the wrong tree?
>
> de John G8SEQ
>
>> -------Original Message-------
>> From: John Worsnop <johnworsnop@gmail.com>
>> To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>> Subject: [UKMicrowaves] Scatterpoint Activity column
>> Sent: May 18 '20 17:45
>>
>> GE All,
>> I've had no contributions for the Scatterpoint activity news this
>> month so far, so it'll be "The G4BAO report" unless I get
> something
>> before lunchtime Wednesday.
>>
>> Doing anything interesting? made any out of the ordinary QSOs?
>> switched the rig on instead of checking the web for activity? had
> a
>> QSO that didn't involve exchanging "59007 IO92WI" ?
>>
>> ;-)
>>
>> Send it to me at the above address before Wednesday Lunchtime and
> the
>> UKuG will put your name in lights............
>>
>> 73
>> John
>>
>>


Re: Scatterpoint Activity column

John E. Beech
 

Tnx fer that Andy. In that case I might try a very simple Schottky diode mixer for starters. I've got a series of 3dB, 6 dB & 10 dB BNC attenuators I can clag in to see how much I need & then build a dedicated attenuator.

de John G8SEQ

-------Original Message-------
From: Andy G4JNT <andy.g4jnt@gmail.com>
To: UK Microwaves groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Scatterpoint Activity column
Sent: May 18 '20 18:46

The output of any LNB is so high you'll need attenuation rather than
gain
The broadband noise output over the complete IF band from 600MHz to
2GHz or so is so high, it can run into compression in some mixers.
DBMs shpuld be OK, but the I/Q downconverter I used to get to 28MHz
required at least 10dB attenuation of the 739MHz input to stay
comfortably in the linear region.

Don't forget image filtering if you use a simple mixer - otherwise you
throw away 3dB S/N on every signal you hear

Andy
www.g4jnt.com

On Mon, 18 May 2020 at 17:57, John E. Beech <john@g8seq.com> wrote:

> Hi John,
> I don't know if this is of any interest, but while I have been
> trying to revive my SSB electronics L 23 S TVTR, my brain went into
> overdrive. Having recently bought a NanoVNA, I now have an easily
> programmable LO with which to make a simpler SDR for QO-100. My LNB
> puts out 739 MHz. By injecting 739 MHz into a suitable mixer ( ie a
> copy of the Rx mixer in the L 23 S, I down convert the 739 MHz to
> baseband to use with some existing software I have.
> But there are more questions than answers. Will I need any
> amplification/filtering at 739 MHz before the mixer or will it have
> sufficient gain? Should I put an audio buffer amplifier between the
> mixer and the sound card input. Has anyone already done this or am I
> barking up the wrong tree?
>
> de John G8SEQ
>
>> -------Original Message-------
>> From: John Worsnop <johnworsnop@gmail.com>
>> To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>> Subject: [UKMicrowaves] Scatterpoint Activity column
>> Sent: May 18 '20 17:45
>>
>> GE All,
>> I've had no contributions for the Scatterpoint activity news this
>> month so far, so it'll be "The G4BAO report" unless I get
> something
>> before lunchtime Wednesday.
>>
>> Doing anything interesting? made any out of the ordinary QSOs?
>> switched the rig on instead of checking the web for activity? had
> a
>> QSO that didn't involve exchanging "59007 IO92WI" ?
>>
>> ;-)
>>
>> Send it to me at the above address before Wednesday Lunchtime and
> the
>> UKuG will put your name in lights............
>>
>> 73
>> John
>>
>>


Re: 13cm anyone?

Chris G0WUS
 

Ben log in kst on tuesday night and we will all be falling over each other to work you lol.

73 chris G0WUS



Sent from my Samsung Galaxy smartphone.


-------- Original message --------
From: "militaryoperator via groups.io" <Military1944@...>
Date: 18/05/2020 5:33 pm (GMT+00:00)
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 13cm anyone?

No qso's, still hopefully next Tuesday?

Still, new SGLabs PA and LNA seems to be doing the trick. I can now hear Leicester, Farnham and Martlesham 13Cm beacons.

I like it when a plan comes together.

So, on with boxing the 9Cm trvrt and pa.

Ben G4BXD


Re: Stacking frames

Robin Szemeti - G1YFG
 

Aluminium every time.


On Mon, 18 May 2020 at 19:51, chris ruddy via groups.io <mm0kos=yahoo.co.uk@groups.io> wrote:
Hi All

just a quick question, would you build your stacking frames from Aluminium of Carbon Fibre for 23 and 13cm

Thanks Chris



--
Best regards,

Robin Szemeti

Redpoint Consulting Limited

E: robin@...
T: +44 (0) 1299 405028
M: +44 (0) 7971 883371

CONFIDENTIALITY NOTICE
The information contained in this e-mail is intended only for the
confidential use of the above named recipient. If you are not the
intended recipient or person responsible for delivering it to the
intended recipient, you have received this communication in error
and must not distribute or copy it.
Please accept the sender's apologies, notify the sender immediately
by return e-mail and delete this communication.

Thank you.


Re: Scatterpoint Activity column

Denis Stanton G0OLX
 

Neil
 What report
Best 73’s
Denis
PS very interesting 

On Mon, 18 May 2020 at 20:28, Neil Smith G4DBN <neil@...> wrote:
Drat, that was supposed to go to John, not the group.  I am a fumbling
idiot with computers. Don't read it in case he does include anything, so
you can then express surprise and delight when you read it.  I'm going
to go and MACHINE something

Neil G4DBN





Re: Scatterpoint Activity column

Neil Smith G4DBN
 

Drat, that was supposed to go to John, not the group.  I am a fumbling idiot with computers. Don't read it in case he does include anything, so you can then express surprise and delight when you read it.  I'm going to go and MACHINE something

Neil G4DBN

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