Date   

Re: Low Noise Power Supply

Colin Ranson
 

I bought from a SK a Nissei MS-1228 ‘Professional’ SMPSU 12v -max 28A.   Its ok for powering VHF/UHF amplifiers but puts out wandering birdies on HF.  The worst ‘Amateur service’ SMPSU I have ever come across was an ICOM PS-85 that came ‘free’ when I bought my IC-746 in 1998. My main interest was 6m then – when I plugged in the antenna on my new radio I was appalled at the amount of ‘noise’ on the band, my heart sank but I soon found out it was the PSU and invested in a linear supply.    I would not have the temerity to sell it to another amateur.

 

 

Best regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Mike Willis
Sent: 17 February 2021 16:03
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Low Noise Power Supply

 

The older (with real meter) version of the Nissai from ML&S is OK. The new one radiates QRM. But I know you like to save money so why not one of the HP ex bitcoinmining supplies? Should be under £20 for 12V 60A. They are not so noisy and can be turned up to 13.8V if you want

--
Mike G0MJW

 


Re: A proper RAE again

Mike Willis
 

Give anyone with interest, technical competence a full license as long as they can demonstrate they understand the rules and the knowledge to do no harm. Otherwise we clone ourselves. We might end up with a bunch of computer programmers, civil or mechanical engineers or retired spooks but that's not necessarily a bad thing.
--
Mike G0MJW


Re: Low Noise Power Supply

Mike Willis
 

The older (with real meter) version of the Nissai from ML&S is OK. The new one radiates QRM. But I know you like to save money so why not one of the HP ex bitcoinmining supplies? Should be under £20 for 12V 60A. They are not so noisy and can be turned up to 13.8V if you want

--
Mike G0MJW


Re: Low Noise Power Supply

Paul Evans W4/VP9KF
 

Surprisingly, I have two MFJ 4125s and they are quiet electrically.
I have also added a thermistor controlled fan speed controller to them so that they are silent (sonically) when ticking over and proportionately run the fan up with load. As supplied they run the fan all the time on the 12V generated at the output which is annoying (I haven't found any other PSUs that run a fan controller, maybe I should sell them!!!?).

--
73, Paul Evans G4BKI [VP9KF]


Low Noise Power Supply

Chris Bartram G4DGU
 

Nothing to do with microwaves, except possibly that it will help me sort-out/rationalise my workroom/shack, and thus help hasten my return to having an operational station.

Does anyone have any (polite!) suggestions regarding a low-noise 12V 20A+ switching PSU?

73

Chris G4DGU


Re: A proper RAE again

ian hope (2E0IJH)
 

Andy, I get approx 4 or 5 enquiries a year about a direct to full from technical people that could easily pass one, But I have been involved with at least 50 exam sessions where someone has sat a foundation and intermediate back to back and at least 20 of those have never wanted to gain a full as they have no interest in a full or need one. Many of these that sat the exam back to back, had no need to take a foundation
 
ian
M5IJH

 
 
Sent: Wednesday, February 17, 2021 at 1:24 PM
From: "Andy G4JNT" <andy.g4jnt@...>
To: "UK Microwaves groups.io" <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] A proper RAE again
I disagree, Ian
If all they want i is an intermediate licence to just play around with, then taking just two exams is no big deal to stay at that level.
As stated, the aim of this is to attract those experienced and already competent people - the ones we actually want to fill our ranks who would have to take three separate exams.
 
I know of at least five people over the years who were put off the whole idea of an amateur radio licence when the nausea of the three level system was introduced..   Three of them were ex military then MoD people, having worked in EW / Comms all their lives.
 
Andy
 
 
On Wed, 17 Feb 2021 at 13:09, ian hope (2E0IJH) <ian@...> wrote:
I've read the whole thing, and made comments, few areas that need some adjustment, looks over technical, some of the power and AC theory stuff is little too much towards HNC level, but nothing that could be fixed with a few mods, Good starting point for debate.
My view is there should be plans for a direct to intermediate as I know many that only ever want intermediate level and have sat both foundation and intermediate back to back. The foundation has drifted from it's original purpose and become too technical.
Likely time to look at the whole structure especially in the light of the ease of making them online, which has opened up the hobby to a vast amount that couldn't work with the Club system, many areas had no exams or training in quite a while as no clubs in the area offered them.
 
Ian
M5IJH
 
 
Sent: Wednesday, February 17, 2021 at 12:59 PM
From: "Andy G4JNT" <andy.g4jnt@...>
To: "UK Microwaves groups.io" <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] A proper RAE again
I skim-read the syllabus.    Not vastly different to a full one with the Noddy elements of the other two included for TOC.
 
Andy
 
 
Virus-free. www.avg.com
 
On Wed, 17 Feb 2021 at 12:55, Murray Niman <g6jyb@...> wrote:
Anyone who has naively raced and filled in the survey without carefully reading the 50 page syllabus should go back to school....

Please check the small print.....!!!

 73

  Murray 

 

 

 

 


Re: A proper RAE again

John E. Beech
 

Same here Ben,
When I took the G&G RAE in 1978, it was questions which said to effect: " Tell us all you know
about propagation or transmitters or whatever".
Todays multiple guess papers are only any good at finding out what you don't know.

de John G8SEQ

-------Original Message-------
From: militaryoperator via groups.io <Military1944=aol.com@groups.io>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] A proper RAE again
Sent: Feb 17 '21 13:32

Unfortunately, being old and decrepit and always feeling that the
young have things far too easy these days I agree with the comment and
sentiment that if we could pass a "written" RAE when 16 odd then
ticking a few multi-choice questions, 2 of which are usually
ridiculous and obviously wrong so can be ignored leaving a 50 50 for
the other two and getting a pass rate only slightly above the
inflation rate cannot be that hard.

I recall something like "Draw the typical circuit of a two-valve
transmitter, give values for each component and state the function of
that component" or "Explain how a Colpitts oscillator works" etc etc.
(What? we no longer use valves. OMG)

In teaching I went from drawing circuits for students to drawing
"Blocks", this an oscillator, this is an amplifier, sig in here,
bigger sig out here. The dumbing down has continued no doubt.

Still, it all evens out. Those who collect the packet tops usually buy
new rigs, get bored in 3 months then sell them off cheaper. I see them
on the FB groups all the time.

Those who are really interested do progress I suppose so we end up
with the right stuff in the end, hi.

cherri pip, good night last night. Ben G4BXD, ex G8.


Re: A proper RAE again

Dave Cawley G4IUG
 

Well said Andy

On my return  to amateur radio years ago,  after a 30 year absence,  I was horrified at what was out there.  I went into this hobby because like the International Telecommunications Union defines amateur radio as “a service of self-training, intercommunication and technical investigation"  that is what I wanted and that is what I got, and it served me well, very well !

The existing system needs overhauling too as some new Foundation people don't seem to know the difference between HF and VHF ? Other are really good.  YMMV

73  Dave  G4IUG  Ex G8EAO


Re: A proper RAE again

militaryoperator
 

Unfortunately, being old and decrepit and always feeling that the young have things far too easy these days I agree with the comment and sentiment that if we could pass a "written" RAE when 16 odd then ticking a few multi-choice questions, 2 of which are usually ridiculous and obviously wrong so can be ignored leaving a 50 50 for the other two and getting a pass rate only slightly above the inflation rate cannot be that hard.

I recall something like "Draw the typical circuit of a two-valve transmitter, give values for each component and state the function of that component" or "Explain how a Colpitts oscillator works" etc etc. (What? we no longer use valves. OMG)

In teaching I went from drawing circuits for students to drawing "Blocks", this an oscillator, this is an amplifier, sig in here, bigger sig out here. The dumbing down has continued no doubt. 

Still, it all evens out. Those who collect the packet tops usually buy new rigs, get bored in 3 months then sell them off cheaper. I see them on the FB groups all the time.

Those who are really interested do progress I suppose so we end up with the right stuff in the end, hi. 

cherri pip, good night last night. Ben G4BXD, ex G8.




Re: A proper RAE again

Andy G4JNT
 

I disagree, Ian
If all they want i is an intermediate licence to just play around with, then taking just two exams is no big deal to stay at that level.
As stated, the aim of this is to attract those experienced and already competent people - the ones we actually want to fill our ranks who would have to take three separate exams.

I know of at least five people over the years who were put off the whole idea of an amateur radio licence when the nausea of the three level system was introduced..   Three of them were ex military then MoD people, having worked in EW / Comms all their lives.



On Wed, 17 Feb 2021 at 13:09, ian hope (2E0IJH) <ian@...> wrote:
I've read the whole thing, and made comments, few areas that need some adjustment, looks over technical, some of the power and AC theory stuff is little too much towards HNC level, but nothing that could be fixed with a few mods, Good starting point for debate.
My view is there should be plans for a direct to intermediate as I know many that only ever want intermediate level and have sat both foundation and intermediate back to back. The foundation has drifted from it's original purpose and become too technical.
Likely time to look at the whole structure especially in the light of the ease of making them online, which has opened up the hobby to a vast amount that couldn't work with the Club system, many areas had no exams or training in quite a while as no clubs in the area offered them.
 
Ian
M5IJH
 
 
Sent: Wednesday, February 17, 2021 at 12:59 PM
From: "Andy G4JNT" <andy.g4jnt@...>
To: "UK Microwaves groups.io" <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] A proper RAE again
I skim-read the syllabus.    Not vastly different to a full one with the Noddy elements of the other two included for TOC.
 
Andy
 
 
Virus-free. www.avg.com
 
On Wed, 17 Feb 2021 at 12:55, Murray Niman <g6jyb@...> wrote:
Anyone who has naively raced and filled in the survey without carefully reading the 50 page syllabus should go back to school....

Please check the small print.....!!!

 73

  Murray 

 

 


Re: A proper RAE again

ian hope (2E0IJH)
 

I've read the whole thing, and made comments, few areas that need some adjustment, looks over technical, some of the power and AC theory stuff is little too much towards HNC level, but nothing that could be fixed with a few mods, Good starting point for debate.
My view is there should be plans for a direct to intermediate as I know many that only ever want intermediate level and have sat both foundation and intermediate back to back. The foundation has drifted from it's original purpose and become too technical.
Likely time to look at the whole structure especially in the light of the ease of making them online, which has opened up the hobby to a vast amount that couldn't work with the Club system, many areas had no exams or training in quite a while as no clubs in the area offered them.
 
Ian
M5IJH

 
 
Sent: Wednesday, February 17, 2021 at 12:59 PM
From: "Andy G4JNT" <andy.g4jnt@...>
To: "UK Microwaves groups.io" <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] A proper RAE again
I skim-read the syllabus.    Not vastly different to a full one with the Noddy elements of the other two included for TOC.
 
Andy
 
 
Virus-free. www.avg.com
 
On Wed, 17 Feb 2021 at 12:55, Murray Niman <g6jyb@...> wrote:
Anyone who has naively raced and filled in the survey without carefully reading the 50 page syllabus should go back to school....

Please check the small print.....!!!

 73

  Murray 

 

 


Re: A proper RAE again

Andy G4JNT
 

I skim-read the syllabus.    Not vastly different to a full one with the Noddy elements of the other two included for TOC.



Virus-free. www.avg.com


On Wed, 17 Feb 2021 at 12:55, Murray Niman <g6jyb@...> wrote:
Anyone who has naively raced and filled in the survey without carefully reading the 50 page syllabus should go back to school....

Please check the small print.....!!!

 73

  Murray 


Re: A proper RAE again

Murray Niman
 

Anyone who has naively raced and filled in the survey without carefully reading the 50 page syllabus should go back to school....

Please check the small print.....!!!

 73

  Murray 


Re: A proper RAE again

Paul Evans W4/VP9KF
 

Well said, Andy. The current silly system is putting more experienced types off the licence and is heavily biassed towards 'young starter' types.

Fill in the survey. I just did.

If I could pass the old, long form RAE at age 13, then there's no reason why a 20 something engineer shouldn't pass a tick box 'nothing to full' exam. They are needed for their creative ideas.

--
73, Paul Evans G4BKI [VP9KF]


A proper RAE again

Andy G4JNT
 

AT long last.

20 years overdue




The RSGB’s Examination Standards Committee is launching a consultation today to ask for the views of the amateur radio community on a new, Direct to Full licence exam which would run in parallel with the existing three-tier system.

 

The background to this consultation and a link to the proposed syllabus can be found on the RSGB website: www.rsgb.org/direct-to-full

 

There is also a link to a short survey which asks specific questions but also gives you an opportunity to add additional comments or questions.

 

The consultation will run until Sunday 14 March after which we will gather the results and announce them in due course.

 

We would encourage everyone to take part in this consultation.



Re: Airscout

Clive Elliott GW4MBS
 

Thanks to the comments on here that has given me the courage to have another bash at trying to get Airscout to run again. I always found it difficult to set up with lots pastes & strange settings that I didn't understand but anyway I got it to work, but 6 months ago it started giving me error warnings about JIT debuggers & was unusable.

Anyway I downloaded the latest version which seemed amazingly easy to install. The only drawback is that the map is now too detailed, I don't need to know where motorways & various towns are located as it makes seeing the aircraft less obvious. Is there a way to simplify the map as to how it was before?

I have removed the airports which has helped declutter it a bit. When I looked at the map selection there were dire warnings about using other maps at my own risk, whatever that might be.

I selected my source as "Virtual Radar Server" is that the best one? Is there any advantage of also using up to two more? I used to find it annoying on the old version that I would be waiting for a red plane to change to purple, but it stayed put then a minute or so it had jumped the line & turned grey : (
--
Clive GW4MBS (ex-G8ADP)
Pottering on 6m - 3cm in a valley in IO71XW where any QSO is a triumph of optimism over geography!


Re: High VSWR on 432 MHz

Gordon REASON <gordonj.reason@...>
 

If , you have a good modern oscilloscope , then why not build the cheap TimeDelay 'thing' , using a 74AC14

hex Shmitt trigger IC . it's on Youtube ...........

Just connect to the end of your Coax cable , and it will tell you if the problem is a short or open , and with some simple maths , how far along the coax , it is .........

On 17 February 2021 at 10:29 Andy GD1MIP <gd1mip@...> wrote:

Julian G4ZOD,  you said..... 'It seems that my new radio senses a higher VSWR then all my other stand alone meters'

My interest was caught. What radio do you have?  I have an IC9700,  that shows a higher SWR on 70cm and 23cm than my stand alone meters or antenna analyser,  eg 1.2:1 on analyser shows 2:1 on radio display. 

Andy Morgan GD1MIP 


3400MHz

DF6NA Rainer
 

Hi,

suplus to my needs:
SM3437-43L 3.4 to 3.7 GHz solid state GaAs-FET Amplifier
Pout +43dBm
Gain 50dB
OIP3 +63dBm
RFin max -6dBm
IN/OUT SMA(f)
DC 12V @ 8.5A
optional ARRA variable attenuator 0-30dB / 5W (1.3-6GHz)

incl. 2 blower to run full output 24H/365days

€ 220,- incl. shipping EU & UK

Pictures on request.

73, Rainer


Re: High VSWR on 432 MHz

Andy GD1MIP
 

Julian G4ZOD,  you said..... 'It seems that my new radio senses a higher VSWR then all my other stand alone meters'

My interest was caught. What radio do you have?  I have an IC9700,  that shows a higher SWR on 70cm and 23cm than my stand alone meters or antenna analyser,  eg 1.2:1 on analyser shows 2:1 on radio display. 

Andy Morgan GD1MIP 


Re: Airscout

Dave
 

Thank you John,
I now have Airscout working perfectly for the first time ever! Am using Virtual Radar and think I pressed all the right buttons!
73
Dave G4GLT.


On 17 Feb 2021, at 09:13, John Lemay <john@...> wrote:



Dave

 

1.       Have you selected at least one plane feed in Options / Planes ?

2.       Have you input a DX station call and locator and pressed Play (bottom right button) ?

3.        Do you have a message at the bottom of the screen like “192 positions updated from webfeed” ?

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Dave via groups.io
Sent: 17 February 2021 09:05
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Airscout

 

I loaded up the new version v1-3-3-5 and with David G4ASR’s suggestion let it load up all night. The outcome is that I can at last see the top window for the first time. The only problem now is that it is not populated with any planes at all. Do I need to change a setting?

73

Dave G4GLT. 



On 16 Feb 2021, at 20:08, Tony G4NBS via groups.io <anthony.collett@...> wrote:

I was using both Virtual Radar Server and Planefinder with the same results last Tuesday in the UKAC John.

Switched to only using OpenSky after Paul G3YDY suggestion - did not need to re-install anything, it simply worked OK since.

Regards
Tony G4NBS


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