Date   

Re: 23cms PA

ian hope (2E0IJH)
 

 
Look at Berts site, http://www.pe1rki.com/, I'd buy one from him, Our Group is going to Buy one of his 150w amps for our Contest Kit.
 
Ian
2E0IJH

Sent: Thursday, July 21, 2016 at 1:47 PM
From: "phil@... [ukmicrowaves]"
To: ukmicrowaves@...
Subject: [ukmicrowaves] 23cms PA
 

 

These pop up on Ebay from time to time 'Pontefract' I wonder if anyone has a good experience of them. I'm trying to be a bigger signal from Cornwall for you all! 

Thanks 

 

Phil G3YPQ/P

Power Amplifer 1296 MHz . 230 Watts.

 

 


23cms PA

g3ypq
 

These pop up on Ebay from time to time 'Pontefract' I wonder if anyone has a good experience of them. I'm trying to be a bigger signal from Cornwall for you all! 

Thanks 


Phil G3YPQ/P

Power Amplifer 1296 MHz . 230 Watts.



Re: F/GM0USI/P IN78/88 3cm next week

Alan
 

I am if ok..slight shower but passed now...hope you won't get too wet. .

Hope you can still manage. ..

73 Alan



Sent from my Samsung device


-------- Original message --------
From: "'g7jtt@...' g7jtt@... [ukmicrowaves]"
Date: 21/07/2016 12:38 (GMT+01:00)
To: ukmicrowaves@..., ukmicrowaves@..., ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

Hi Alan just checked the weather and its looking a bit wet at your end are you still up for testing this Afternoon ? 


 

Alan


My mobile is 07824365556.

Ed G3VPF



 

Hi Alan times are good for me my mobile is 07762112271


 

Thursday at 1600 local. ..1500 your time..any mobile numbers might be handy?
Will be on .120 from 1500BST...

Hope to hear some of you! 

73 Alan  F/GM0USI/P  IN88aq



Sent from my Samsung device


-------- Original message --------
From: "Edward Harland g3vpf@... [ukmicrowaves]"
Date: 19/07/2016 20:32 (GMT+01:00)
To: ukmicrowaves@..., ukmicrowaves@...
Subject: RE: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

Thursday works best for me. Let me know what time you will be on and I can go to Abbotsbury Hill. Ideal for cross-channel work but not so good to East. 


Ed G3VPF


 

Ditto can do Thursday so looks like you got three willing participants. To Noel will meet you at lane end and if that doesn't work we can always try pickets post maybe? 

John


 

I can do 3pm (UK) on Thursday but not Friday.

73 – Noel G8GTZ

 

From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: Tuesday, July 19, 2016 6:39 PM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

 

Hello again,

 

I wonder if we should leave the test until a little later in the week when Ed can be qrv....l worked Ralph today just to test the kit was ok...He was 59+ and l around 57 from IN88AQ. ....He said it might be better to wait until 4pm or so when the temp has cooled off a bit though it should be a bit cooler anyway....

What about 4pm (3pm) on Thursday or Friday if that suits....let me know any other times might be better for you.. l could be qrv pretty quickly if required and l am about..

 

73 Alan F/GM0USI/P

 

 

 

Sent from my Samsung device



-------- Original message --------
From: "Edward Harland g3vpf@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 19/07/2016 05:35 (GMT+01:00)
To: ukmicrowaves@..., ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

Alan

 

Regrettably Weds is the only day this week I can't make, tied up in a meeting in Southampton all day. For info there was all the visual signs of a super-refraction duct out in the Channel this afternoon. Also, the weather will change overnight Tuesday into Wednesday to much cooler air so little chance of surface ducts after that.

 

Ed G3VPF

 

 

Yep you've picked a week of good weather Wednesday is good for me, have to be somewhere in the morning but should be done by lunch so will head straight over to lane end 

73 John

 

 

Hi there,

 

Have arrived in the Roscoff area and am staying for a week in St Pol de.Leon just to the south...wx looks extremely warm tomorrow so thinking Wednesday around 13-1500local...local time here is 1 hour ahead...

I can use my phone for calls and data so l can easily phone or attempt to get on KST...l will be using 10368.120...cw possible also

Kit is only around 1.75w to a flatflat panel antenna of around 20db...

Hopefully l haven't forgotten anything..

If Wednesday doesn't suit l may be able to make time on another occasion. .

Locator should be about IN88AQ but that may change if l can't get a parking space hi.

73 Alan F/GM0USI/P 07785744643

 

 

 

 

Sent from my Samsung device

-------- Original message --------
From: "Alan Dimmick dimmickalan@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 18/07/2016 01:03 (GMT+01:00)
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

No probs Adrian,

 

Am.on the ferry as l write...l think tues or wed is looking possible but will post further details. .

 

73 Alan

 

 

 

Sent from my Samsung device



-------- Original message --------
From: "Adrian whatmore g4uvz@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 17/07/2016 14:41 (GMT+00:00)
To: ukmicrowaves@...
Subject: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

I too am keen to work across from the south west from one of my sites near Taunton ..I think that you plan to work Edward VPF ..so could deploy at a similar time ..Happy for a timed sked if neccessary,,I too run the DGU but now with a 7 watt PA ,so we should have no problems

Adrian 07778 523 832   adrianwhatmore248@...

 


Re: F/GM0USI/P IN78/88 3cm next week

John McCarthy
 

Hi Alan just checked the weather and its looking a bit wet at your end are you still up for testing this Afternoon ? 


On Tue, 19 Jul, 2016 at 20:01, Edward Harland g3vpf@... [ukmicrowaves]
wrote:
 

Alan


My mobile is 07824365556.

Ed G3VPF



 

Hi Alan times are good for me my mobile is 07762112271


 

Thursday at 1600 local. ..1500 your time..any mobile numbers might be handy?
Will be on .120 from 1500BST...

Hope to hear some of you! 

73 Alan  F/GM0USI/P  IN88aq



Sent from my Samsung device


-------- Original message --------
From: "Edward Harland g3vpf@... [ukmicrowaves]"
Date: 19/07/2016 20:32 (GMT+01:00)
To: ukmicrowaves@..., ukmicrowaves@...
Subject: RE: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

Thursday works best for me. Let me know what time you will be on and I can go to Abbotsbury Hill. Ideal for cross-channel work but not so good to East. 


Ed G3VPF


 

Ditto can do Thursday so looks like you got three willing participants. To Noel will meet you at lane end and if that doesn't work we can always try pickets post maybe? 

John


 

I can do 3pm (UK) on Thursday but not Friday.

73 – Noel G8GTZ

 

From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: Tuesday, July 19, 2016 6:39 PM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

 

Hello again,

 

I wonder if we should leave the test until a little later in the week when Ed can be qrv....l worked Ralph today just to test the kit was ok...He was 59+ and l around 57 from IN88AQ. ....He said it might be better to wait until 4pm or so when the temp has cooled off a bit though it should be a bit cooler anyway....

What about 4pm (3pm) on Thursday or Friday if that suits....let me know any other times might be better for you.. l could be qrv pretty quickly if required and l am about..

 

73 Alan F/GM0USI/P

 

 

 

Sent from my Samsung device



-------- Original message --------
From: "Edward Harland g3vpf@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 19/07/2016 05:35 (GMT+01:00)
To: ukmicrowaves@..., ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

Alan

 

Regrettably Weds is the only day this week I can't make, tied up in a meeting in Southampton all day. For info there was all the visual signs of a super-refraction duct out in the Channel this afternoon. Also, the weather will change overnight Tuesday into Wednesday to much cooler air so little chance of surface ducts after that.

 

Ed G3VPF

 

 

Yep you've picked a week of good weather Wednesday is good for me, have to be somewhere in the morning but should be done by lunch so will head straight over to lane end 

73 John

 

 

Hi there,

 

Have arrived in the Roscoff area and am staying for a week in St Pol de.Leon just to the south...wx looks extremely warm tomorrow so thinking Wednesday around 13-1500local...local time here is 1 hour ahead...

I can use my phone for calls and data so l can easily phone or attempt to get on KST...l will be using 10368.120...cw possible also

Kit is only around 1.75w to a flatflat panel antenna of around 20db...

Hopefully l haven't forgotten anything..

If Wednesday doesn't suit l may be able to make time on another occasion. .

Locator should be about IN88AQ but that may change if l can't get a parking space hi.

73 Alan F/GM0USI/P 07785744643

 

 

 

 

Sent from my Samsung device

-------- Original message --------
From: "Alan Dimmick dimmickalan@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 18/07/2016 01:03 (GMT+01:00)
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

No probs Adrian,

 

Am.on the ferry as l write...l think tues or wed is looking possible but will post further details. .

 

73 Alan

 

 

 

Sent from my Samsung device



-------- Original message --------
From: "Adrian whatmore g4uvz@... [ukmicrowaves]" <ukmicrowaves@...>
Date: 17/07/2016 14:41 (GMT+00:00)
To: ukmicrowaves@...
Subject: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 

I too am keen to work across from the south west from one of my sites near Taunton ..I think that you plan to work Edward VPF ..so could deploy at a similar time ..Happy for a timed sked if neccessary,,I too run the DGU but now with a 7 watt PA ,so we should have no problems

Adrian 07778 523 832   adrianwhatmore248@...

 


Re: Power Sense o/p and masthead SSPA's

Mark GM4ISM
 

David
The voltage drop and more importantly the probability of  noise induced in the cables  in a high RF environment make this quite difficult to do with simple analogue indications .
With Binoculars in hand you could drive a  bright LED with the 1 V via a simple transistor stage
This can be set so that full brightness = full power, on SSB you get a re-assuring  amplitude modulated light.  2 LEDs fully lit on key down and you are good to go
This cant measure power in any calibrated way but it is a good confidence check. Several of my portable transverters and amps have this facility.
 
If you want something more sophisticated yet cheap, consider an Arduino processor at the top with  its A-D converter, signalling  another with an LCD in the shack or just displaying on a computer. This could display  the DC voltage or even power with a simple lookup in the software. It could even calculate a combined power indication  and  have alarms for abnormal conditions
 
Not sure if the Arduino  native Serial signalling will be robust enough over the distance you have but you could always use I2C or external interface for differential serial signalling
 
Arduinos  are VERY cheap (look for mini-pro or uno from china on eBay)  and they are incredibly easy to programme with large numbers of  published projects that you can borrow, and almost all the clever bits handled by pre written routines.
If you get really fancy you can equip the arduino with Ethernet, IR Remote control, RF link, Bluetooth or wifi  add-ons (shields)   all relatively easy and cheap
I have dabbled with  several PICs  in the past  and find the coding hard work,  Arduinos by comparison are a breeze.
In general  a simple project will cost less in hardware using arduinos (a few quid each) and  take about the same time to develop and test..
Maybe not your thing, but  it may be a solution for your needs
 
If Arduinos seem like a way forward, I am happy to share my recent experience of them  or just look up the huge resource online
examples of what is on the net with a quick search
 
 
Regards
Mark GM4ISM
 

Sent: Wednesday, July 20, 2016 9:47 PM
Subject: [ukmicrowaves] Power Sense o/p and masthead SSPA's
 
 

Does anyone bother to bring the circa 1volt power sense output from a masthead SSPA back into the shack.


My run is about 70-80 feet.


I would like to monitor that the SSPA's (two off) are generating power instead of flying blind.


The PSU's will be located at the base of the tower, not in the shack, so not easy to monitor current etc.


73 David G4ASR


In the good old days on 160m all i needed was an rf ammeter at the base of the vertical and a pair of binoculars. (For newbies ,,, thats a real meter with a built-in thermocouple, no electronics!) 



 



   

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7688 / Virus Database: 4627/12647 - Release Date: 07/20/16


Re: Power Sense o/p and masthead SSPA's

John Quarmby
 

Hi David

I do monitor the sense outputs in the shack where possible, but beware that volt drop in the power cables feeding the SSPA may cause the readings to significantly differ from reality unless you reference the ground for the meter back to the masthead PA on a dedicated wire that is grounded to the SSPA and not at the shack end.

73

John G3XDY


On 20/07/2016 20:47, g4asr@... [ukmicrowaves] wrote:

Does anyone bother to bring the circa 1volt power sense output from a masthead SSPA back into the shack.


My run is about 70-80 feet. 


I would like to monitor that the SSPA's (two off) are generating power instead of flying blind. 


The PSU's will be located at the base of the tower, not in the shack, so not easy to monitor current etc. 


73 David G4ASR


In the good old days on 160m all i needed was an rf ammeter at the base of the vertical and a pair of binoculars. (For newbies ,,, thats a real meter with a built-in thermocouple, no electronics!)  



 



    





Avast logo

This email has been checked for viruses by Avast antivirus software.
www.avast.com



Power Sense o/p and masthead SSPA's

DAVID G4ASR
 

Does anyone bother to bring the circa 1volt power sense output from a masthead SSPA back into the shack.


My run is about 70-80 feet. 


I would like to monitor that the SSPA's (two off) are generating power instead of flying blind. 


The PSU's will be located at the base of the tower, not in the shack, so not easy to monitor current etc. 


73 David G4ASR


In the good old days on 160m all i needed was an rf ammeter at the base of the vertical and a pair of binoculars. (For newbies ,,, thats a real meter with a built-in thermocouple, no electronics!)  



 



    


Re: F/GM0USI/P IN78/88 3cm next week

Adrian whatmore <g4uvz@...>
 

I am good for tomorrow  will be set up ready to go at 3pm UKTIME! from IO80LW23
Unfortunately only talkback will be via 600 ohms   07778 523 832
Had a successful one way with John API this lunchtime from base of the Mendip mast..see attached.
The 7watts burnt nicely through John's tree cove


On Tuesday, 19 July 2016, 18:39, "Alan Dimmick dimmickalan@... [ukmicrowaves]" wrote:


 
Hello again,

I wonder if we should leave the test until a little later in the week when Ed can be qrv....l worked Ralph today just to test the kit was ok...He was 59+ and l around 57 from IN88AQ. ....He said it might be better to wait until 4pm or so when the temp has cooled off a bit though it should be a bit cooler anyway....
What about 4pm (3pm) on Thursday or Friday if that suits....let me know any other times might be better for you.. l could be qrv pretty quickly if required and l am about..

73 Alan F/GM0USI/P



Sent from my Samsung device


-------- Original message --------
From: "Edward Harland g3vpf@... [ukmicrowaves]"
Date: 19/07/2016 05:35 (GMT+01:00)
To: ukmicrowaves@..., ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week



 
Alan

Regrettably Weds is the only day this week I can't make, tied up in a meeting in Southampton all day. For info there was all the visual signs of a super-refraction duct out in the Channel this afternoon. Also, the weather will change overnight Tuesday into Wednesday to much cooler air so little chance of surface ducts after that.

Ed G3VPF


 
Yep you've picked a week of good weather Wednesday is good for me, have to be somewhere in the morning but should be done by lunch so will head straight over to lane end 
73 John


 
Hi there,

Have arrived in the Roscoff area and am staying for a week in St Pol de.Leon just to the south...wx looks extremely warm tomorrow so thinking Wednesday around 13-1500local...local time here is 1 hour ahead...
I can use my phone for calls and data so l can easily phone or attempt to get on KST...l will be using 10368.120...cw possible also
Kit is only around 1.75w to a flatflat panel antenna of around 20db...
Hopefully l haven't forgotten anything..
If Wednesday doesn't suit l may be able to make time on another occasion. .
Locator should be about IN88AQ but that may change if l can't get a parking space hi.
73 Alan F/GM0USI/P 07785744643




Sent from my Samsung device
-------- Original message --------
From: "Alan Dimmick dimmickalan@... [ukmicrowaves]"
Date: 18/07/2016 01:03 (GMT+01:00)
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 
No probs Adrian,

Am.on the ferry as l write...l think tues or wed is looking possible but will post further details. .

73 Alan



Sent from my Samsung device


-------- Original message --------
From: "Adrian whatmore g4uvz@... [ukmicrowaves]"
Date: 17/07/2016 14:41 (GMT+00:00)
To: ukmicrowaves@...
Subject: [ukmicrowaves] Re: F/GM0USI/P IN78/88 3cm next week

 
I too am keen to work across from the south west from one of my sites near Taunton ..I think that you plan to work Edward VPF ..so could deploy at a similar time ..Happy for a timed sked if neccessary,,I too run the DGU but now with a 7 watt PA ,so we should have no problems
Adrian 07778 523 832   adrianwhatmore248@...




Re: Réf. : Re: Crystal

Christopher Bartram <cbartram@...>
 

Hello Francois

Yes. HC35/U is the 'official' US military designation of the can. Generally, people in the UK, particularly radioamateurs, tend to call that package 'TO-5'.

I know KVG and Euroquartz, of course: I've dealt with a large number of crystal manufacturers internationally, although it has been about 10years since I ordered a custom crystal professionally, as most of the things I have designed recently have used some form of frequency synthesis. One of the major reasons for that, apart from flexibility, is that the costs of decent crystals have risen dramatically, and availability has fallen.

One of my main reasons for asking here if anybody has a suitable crystal is that I don't want to spend well over 100euros on a good custom crystal which may only be used for a few months in a temporary beacon which will then be replaced by a current technology synthesised unit. The other reason is that an older crystal, which has possibly been used for several years, should have much better ageing than a new unit.

As you say, it's likely to be a difficult search. If somebody does have a suitable crystal, I'll go ahead and modify the brick I have here. It will make a useful spare for our network once the new design is finished. Otherwise I'll continue with my development.

Vy 73

Chris
GW4DGU


Re: Crystal

Christopher Bartram <cbartram@...>
 

Whoops! That should have been a TO-5 crystal ...


Réf. : Re: Crystal

F1CHF
 

so you mean HC35/U or HC35
see here
or
 
I got this adress for this kind of Quartz (not verified)
 
good luck, not easy to find ..
Francois F1CHF
 
 
 
 
 
-------Message original-------
 
Date : 20/07/2016 13:32:32
Sujet : Re: [ukmicrowaves] Crystal
 
 

Whoops! That should have been a TO-5 crystal ...

 


Crystal

Christopher Bartram <cbartram@...>
 

On the off-chance, does anyone have a ~96.008MHz, 60degree, HC18-type package crystal mouldering in their junk-box? I'm currently designing a new-generation beacon transmitter, initially for 10GHz, for the reincarnation of GB3RPE (and probably GB3KBQ, but realistically that won't be ready for some months, although I have made a proof of principle prototype of the 10GHz cavity VCO, which has extremely encouraging performance.

As a backstop, I'm putting together a temporary FSK beacon made from bits of an old transverter. The LO of the transverter uses a phase-locked brick, hence my request. A used crystal would be very acceptable, as it will probably mean that it's initial ageing will be long past, and it will be ready for service very quickly, should Ofcom (or more likely the PU ...) decide to drop a bombshell and allow the NoV before I'm finished with the new design.

Vy 73

Chris
GW4DGU


Re: 10GHzPortaBeacon On

g3thq <g3thq@...>
 

I was listening Andy, but heard nothing except one false decode.
My home QTH IO91un, very poor for 10GHz.  I can only hear GB3SEE!

--


On 20/07/2016 10:19, Andy Talbot andy.g4jnt@... [ukmicrowaves] wrote:
So no one was interested in the test apart from G0API,  who received the signal very strong though trees and decoded immediately.  And one other to apologise for not being able to get on.

I'll be generous and assume either you were doing the 1.3GHz AC event  or were out in the garden relaxing with a barbecue and drinks after that one day of lethally hot weather we've just had.

But still think I'll concentrate on LF - there, a lot more people listen out for transmissions all the time.  And nowadays there is even operation in summer, normally considered a poor time of year for LF operation due to noise levels  - seems it isn't, after all.

Andy  G4JNT

On 19 July 2016 at 20:31, Andy Talbot <andy.g4jnt@...> wrote:
Now pointing north.
I'll leave t there
 'jnt


On 19 July 2016 at 20:09, Andy Talbot <andy.g4jnt@...> wrote:
I'm currently on Crabwood farm, Near Winchester IO91HB75 running the new 10GHz PortaBeacon

JT4G 10368.350 (Tone zero)   tune 10368.3492

Using a 20dB horn with takeoff to the north, but currently pointing West.   Any requests for tests, my mobile no is 07576 765856.
Complete blockage toteh east from this location, but if anyone wants, I can drive round the corner later see if there is a path in that direction

Andy  G4JNT






Re: 10GHzPortaBeacon On

Andy G4JNT
 

So no one was interested in the test apart from G0API,  who received the signal very strong though trees and decoded immediately.  And one other to apologise for not being able to get on.

I'll be generous and assume either you were doing the 1.3GHz AC event  or were out in the garden relaxing with a barbecue and drinks after that one day of lethally hot weather we've just had.

But still think I'll concentrate on LF - there, a lot more people listen out for transmissions all the time.  And nowadays there is even operation in summer, normally considered a poor time of year for LF operation due to noise levels  - seems it isn't, after all.

Andy  G4JNT

On 19 July 2016 at 20:31, Andy Talbot <andy.g4jnt@...> wrote:
Now pointing north.
I'll leave t there
 'jnt


On 19 July 2016 at 20:09, Andy Talbot <andy.g4jnt@...> wrote:
I'm currently on Crabwood farm, Near Winchester IO91HB75 running the new 10GHz PortaBeacon

JT4G 10368.350 (Tone zero)   tune 10368.3492

Using a 20dB horn with takeoff to the north, but currently pointing West.   Any requests for tests, my mobile no is 07576 765856.
Complete blockage toteh east from this location, but if anyone wants, I can drive round the corner later see if there is a path in that direction

Andy  G4JNT





GM6BIG 10GHz test beacon 10368.500

David GM6BIG
 

Hi All,

Possibility of some antenna work today, around 1700-1800, Wx dependant.
So a short interruption to the beacon around then.

Its on pretty much 24/7 at the moment, including the weekend.

Reports to Beaconspot and direct to gm6big@....

Cheers, David GM6BIG










Hi All,

I have an attended beacon running on test on 10368.500.
it wont be on quite 24/7, but will be on much of the day for a few weeks.

Its located near Salsburgh, between Glasgow and Edinburgh and has a fairly good 360 deg horizon.

It is GPS locked and will send an "L" after the call if its inlock.
It will also send an "F" if the fan is running.

Its not quite ready for the big time yet, and needs some more work.
But, I wont have the opportunity to work on it for a while, so figured it best to put it on and get some feedback.

Am interested in coverage reports of course and what you think of the tones.
It should have better coverage than CSB...

Please email the via the reflector or direct to me at gm6big@...

Cheers, DAvid GM6BIG

Virus-free. www.avast.com


Re: OZ5N Auto PLL

GORDONJ REASON <gordonj.reason@...>
 

I put 3mm flashing blue Led's , £4.99 for 50 ... ebay .... on equipment , that is battery powered , with no indication that it's switched on , otherwise ...... turning the light out in the shack , is illuminating ..... 

On 19 July 2016 at 23:05 "Andy Talbot andy.g4jnt@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

 

Efficient things, blue LEDs.  Rumour has it some are approaching 50% efficiency.  Which means if you could reflect all the light back in, you'd see the current consumption drop.  

 I did once try to do that, but couldn't arrange any optics to collect and reflect back more than about 10% .

One thing that makes them seem bright; the rods in the eye (responsible for night time vision) are very sensitive to blue, so off bore-sight, blue light will always stand out in the presence of other colours.   It's no coincidence blue lights are used on emergency vehicles.

'jnt


On 19 July 2016 at 16:27, geoffrey pike gi0gdp@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

 

I was surprised at the 10k and then equally surprised that my brand new Ebay 5mm blue LEDs worked a treat !
Geoff
 


On Tuesday, 19 July 2016, 16:16, "'mike' mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:


 

Thank you Andy, I stand corrected, 210 ohms indeed it was!!
 
Mike G6TRM
 
----- Original Message -----
Sent: Tuesday, July 19, 2016 3:48 PM
Subject: Re: [ukmicrowaves] OZ5N Auto PLL

 
 
factor of 10 out
 2.1v/10mA = 210 ohms
Use 220R

'jnt


On 19 July 2016 at 15:46, 'mike' mb.golfmad@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Hi Kevin,
Hopefully If I add to the list of those who have modified their DB6TN 10ghz Transverter, it will inspire you a little more to go ahead and try.....
My modifications were very similar to Geoff's...I too have photos. if you think that will help please ask..
 
One small issue for me was using the option of an external LED, on inspecting the circuit, a current a limiting resistor of 10k was on the board ( not enough to drive a conventional LED). As I had loads of "normal" leds ( not low volt versions) .. I decided to change the 10k resistor (R9) for a more suitable value.. I checked the PIC pin had enough drive, no problem,  I choose a value of    2k2 for 9/10ma of current.
3.3v -1.2v(LED volt drop) = 2.1v/10mA = 2100R,  2k2 selected.  It all works well, nice and bright... before I did the mod I checked what the original circuit would do...I could hardly see the led was on...certainly not in bright sunlight..no good for me...I guess overall current drawn has gone up but is so small as not to be an issue.
 
hope this helps,
 
cheers,
 
Mike G6TRM
 
----- Original Message -----
Sent: Tuesday, July 19, 2016 1:11 PM
Subject: Re: [ukmicrowaves] OZ5N Auto PLL

 
Hi Kevin,
The pics are too big for attaching so please go to the files section under OZ5N folder
Hope they are of some use
Geoff
GI0GDP
 
 

 
 
 


 

 

 


 


 


Re: OZ5N Auto PLL

Andy G4JNT
 

Efficient things, blue LEDs.  Rumour has it some are approaching 50% efficiency.  Which means if you could reflect all the light back in, you'd see the current consumption drop.  

 I did once try to do that, but couldn't arrange any optics to collect and reflect back more than about 10% .

One thing that makes them seem bright; the rods in the eye (responsible for night time vision) are very sensitive to blue, so off bore-sight, blue light will always stand out in the presence of other colours.   It's no coincidence blue lights are used on emergency vehicles.

'jnt


On 19 July 2016 at 16:27, geoffrey pike gi0gdp@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

I was surprised at the 10k and then equally surprised that my brand new Ebay 5mm blue LEDs worked a treat !
Geoff


On Tuesday, 19 July 2016, 16:16, "'mike' mb.golfmad@... [ukmicrowaves]" <ukmicrowaves@...> wrote:


 

Thank you Andy, I stand corrected, 210 ohms indeed it was!!
 
Mike G6TRM
 
----- Original Message -----
Sent: Tuesday, July 19, 2016 3:48 PM
Subject: Re: [ukmicrowaves] OZ5N Auto PLL

 
factor of 10 out
 2.1v/10mA = 210 ohms
Use 220R

'jnt


On 19 July 2016 at 15:46, 'mike' mb.golfmad@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Hi Kevin,
Hopefully If I add to the list of those who have modified their DB6TN 10ghz Transverter, it will inspire you a little more to go ahead and try.....
My modifications were very similar to Geoff's...I too have photos. if you think that will help please ask..
 
One small issue for me was using the option of an external LED, on inspecting the circuit, a current a limiting resistor of 10k was on the board ( not enough to drive a conventional LED). As I had loads of "normal" leds ( not low volt versions) .. I decided to change the 10k resistor (R9) for a more suitable value.. I checked the PIC pin had enough drive, no problem,  I choose a value of    2k2 for 9/10ma of current.
3.3v -1.2v(LED volt drop) = 2.1v/10mA = 2100R,  2k2 selected.  It all works well, nice and bright... before I did the mod I checked what the original circuit would do...I could hardly see the led was on...certainly not in bright sunlight..no good for me...I guess overall current drawn has gone up but is so small as not to be an issue.
 
hope this helps,
 
cheers,
 
Mike G6TRM
 
----- Original Message -----
Sent: Tuesday, July 19, 2016 1:11 PM
Subject: Re: [ukmicrowaves] OZ5N Auto PLL

 
Hi Kevin,
The pics are too big for attaching so please go to the files section under OZ5N folder
Hope they are of some use
Geoff
GI0GDP





Re: 10GHzPortaBeacon On

John McCarthy
 

Sorry Andy but early start tomorrow prevents me from looking tonight but if your about Thursday find a spot and point towards France as Andy is about and at least three stations UK side see the thread on the Yahoo forum for more details. On a side note hope to have full tx/rx for JT tomorrow if last component turns up.

John


On Tue, 19 Jul, 2016 at 20:31, Andy Talbot andy.g4jnt@... [ukmicrowaves]
wrote:
 

Now pointing north.
I'll leave t there
 'jnt


On 19 July 2016 at 20:09, Andy Talbot <andy.g4jnt@...> wrote:
I'm currently on Crabwood farm, Near Winchester IO91HB75 running the new 10GHz PortaBeacon

JT4G 10368.350 (Tone zero)   tune 10368.3492

Using a 20dB horn with takeoff to the north, but currently pointing West.   Any requests for tests, my mobile no is 07576 765856.
Complete blockage toteh east from this location, but if anyone wants, I can drive round the corner later see if there is a path in that direction

Andy  G4JNT




Re: 10GHzPortaBeacon On

Andy G4JNT
 

Now pointing north.
I'll leave t there
 'jnt


On 19 July 2016 at 20:09, Andy Talbot <andy.g4jnt@...> wrote:
I'm currently on Crabwood farm, Near Winchester IO91HB75 running the new 10GHz PortaBeacon

JT4G 10368.350 (Tone zero)   tune 10368.3492

Using a 20dB horn with takeoff to the north, but currently pointing West.   Any requests for tests, my mobile no is 07576 765856.
Complete blockage toteh east from this location, but if anyone wants, I can drive round the corner later see if there is a path in that direction

Andy  G4JNT




10GHzPortaBeacon On

Andy G4JNT
 

I'm currently on Crabwood farm, Near Winchester IO91HB75 running the new 10GHz PortaBeacon

JT4G 10368.350 (Tone zero)   tune 10368.3492

Using a 20dB horn with takeoff to the north, but currently pointing West.   Any requests for tests, my mobile no is 07576 765856.
Complete blockage toteh east from this location, but if anyone wants, I can drive round the corner later see if there is a path in that direction

Andy  G4JNT