Date   

Re: PCB delivery

Robin Szemeti - G1YFG
 

Yes it is, google "peterantypas AIS" .. I have 5 boards here and only really need one, and an SMT paste stencil ... I may even have spares of the two "hard to get" chips, the SiRadio devices and the skytronics RF switch .. ping me offlist, it is radio related, but I doubt the uWave lot want to hear us prattling on about boaty digital comms.

On Fri, 8 Jan 2021 at 14:17, Martin Phillips G4CIO <martin@...> wrote:
<OT> Hi Robin, is the AIS tcvr a published design? I've been thinking for a while that we could do with one on one of our boats...</OT>

Martin/

On 8/1/21 12:25 PM, Robin Szemeti - G1YFG wrote:
Nice delivery of pcbs today, the 9cm transverter is the one that I'm looking forward to building up.

There is another batch of CANFI noise heads, but my pick and place is in bits at the moment,  i 'll try and sort that, and mount the components, otherwise they'll have to go out as kits.

There are some 2m and 70cm LNA, some mmic boards for a friend and an AIS transceiver for my boat. Plenty of RF  projects to keep me busy.

--
Robin Szemeti - G1YFG



--
Robin Szemeti - G1YFG


Re: PCB delivery

Martin Phillips G4CIO
 

<OT> Hi Robin, is the AIS tcvr a published design? I've been thinking for a while that we could do with one on one of our boats...</OT>

Martin/

On 8/1/21 12:25 PM, Robin Szemeti - G1YFG wrote:
Nice delivery of pcbs today, the 9cm transverter is the one that I'm looking forward to building up.

There is another batch of CANFI noise heads, but my pick and place is in bits at the moment,  i 'll try and sort that, and mount the components, otherwise they'll have to go out as kits.

There are some 2m and 70cm LNA, some mmic boards for a friend and an AIS transceiver for my boat. Plenty of RF  projects to keep me busy.

--
Robin Szemeti - G1YFG



Re: Re elevation on a dish

John Fell
 

Hi Dave ,
I had a 20W TWT based system up this mast for over 20 years before moving on to use bits of it for 10GHz EME at G4RFR .

The first G to G contact on 10GHz (CW) used the TVTR - 1994 between G4RFR and G3WDG , using 12 Ft prime focus 0.43f/D dish at our end.

The TVTR was quite a load for my 30Ft Western Ulimast and restricted other band antenna deployment a bit .....feeding all TWT rails up rotator style multicore cables ......
My TVTR used original G3WDG modules with a modified 4 port WG16 on its front end , with the 2 stages of LNA directly on the RX port and TWT output on the TX port .The feed was a G3PHO type WG 16 flanged and feeding the 4 port switch via EW90 elliptical waveguide .Probably had about 1 m total between the feed and the front end LNA .
For tropo use this still represents a reasonable insertion loss . You can easily make ur own EW90 flanges to marry standard WG16 flanged ports .
Form the required bends into the EW90 - using gentle bends by hand /vice.

A 10W system at the dish will form a potent terrestrial system , but do spend the time to Engineer the housing to prevent condensation .An inverted bucket format is good as it allows airflow and if you take all services in via the open end rain tends to stay out .( worked a few with 10W TWT last year on the 12Ft dish - on 10GHz CW ) . The 200W TWT makes for louder echoes though .

From home I am only operational on RX on 10GHz , but having £10 LNBs and GPS reference locking makes it a potent and cheap thing to do .

73
John
G0API

On Fri, 8 Jan 2021 at 11:33, Dave via groups.io <davidnewman55=icloud.com@groups.io> wrote:
Hello John,
Thanks very much indeed for photos of your system. Yes, I take your point about spacing the dish far away enough to get 30 degrees of elevation. I am torn between using a  waveguide feed or preamp at the feedpoint.
I will look at the limits of the Jack very carefully in the workshop as you suggested. 
If your system has lasted for so long it must be very rugged and well constructed. 
Thanks again for all the pointers.
73
Dave G4GLT. 

On 8 Jan 2021, at 10:55, John Fell <john.g0api@...> wrote:


Hi Dave ,
Had to wait for the frost to lift to take these pics .
My masthead 60cm dish and Elevation system .

18" jack used with base end pivot made from 3" exhaust clamp around the standard Scaf pole mast extension above KR600 inside cage support ( just below bottom of pic).Extra large clamp allows one leg of U bolt to be fitted with a turned alum sleeve spacer to take the eye of the base balljoint of the jack.Also allows positional adjustment to set up desired stroke/maximum dish travel..

Top end of jack fits onto a welded pivot bolt attached to underside of a 2 x 1" steel hollow section , welded or bolted to a steel stand-off plate that has a steel hinge at the mast end .The other end of the hinge is welded to a steel Scaf clamp , which again can be adjusted to setup the final geometry .

The dish is mounted on 1.25" dimeter steel tube that came with it - in this case it is a 90 degree bent item so that is why the 2X1" hollow section is used to offset the dish tube and put the vertical load thrust on the centre line of the vertical mast .Room to add masthead PA/front end housings just behind the dish , without adding much loading to the feed arm etc .

You will notice the system puts the offset dish well forward offset to the mast - this allows the top rim of the dish to travel to an effective 30 degrees of Elevation .
That allows pointing at QO100 and well above ground noise sources for Sun noise  measurements and I have decoded DL0SHF several times over last few years .Other antennas on mast above are positioned to offset the dish system , again putting the vertical loading equally about the rotator cage .

The small box on a standoff 1"x1/8" aluminium flat bar just in front and below dish base  is housing a G4JNT AZ/EL digital sensor .

Which ever system you build make sure the jack is adjusted so its internal limit switches limit the travel within limits that protect the dish - I managed to fold this dish at the top with 12V supply and the only thing I noticed was a sudden rise in ground noise !

After 30+ years up the mast the only thing that needed replacement was the jack ( running leadscrew nut fractured ) -  the light coloured cylinder on the jack is an old aluminium Dow Corning Vacuum oil can - this covers the top end jack seal to prevent rain getting in when/if the seal cracks - smother all surfaces in Waxoil ....

73
John
G0API

On Thu, 7 Jan 2021 at 17:03, Dave via groups.io <davidnewman55=icloud.com@groups.io> wrote:
Hello,
I am adding elevation on a dish for tropo only (not EME) and wondered if anyone has a photo of the mechanics of it, preferably with some sort of hinge . I have an actuator which has a stroke length of 4 inches. I think the lower part of the dish will have to be pushed outwards.
73
Dave G4GLT.





<DSCF7244.JPG>
<DSCF7245.JPG>


MMIC's

Colin Ranson
 

Hi all,

 

I have repurposed a DDK 2008 L band source from 96MHz to 106.5MHz with an output of 1278MHz.  The original was extended to include a PGA103+ to bump up the output to feed a high level mixer.   

 

 

Thinks ?  could I use this MMIC as a doubler to 2256MHz ? I understand from texts that it has to be operated in a non-linear fashion)  At the moment its biased to 3.5v and I have removed a level determining attenuator so I am hitting the MMIC quite hard. I am detecting very little at 2556MHz at the moment. (not enough to drive my Qualcom x 4 multiplier to 10.224GHz)

 

Can anyone give me a ballpark figure to set the bias to please ? And is this likely to work well enough ? I have not tried this method before so hopefully with enough 2256MHz I will include a ‘stop-end’ filter and enough gain to give me 3dbm at the Qualcom Mult input. Getting the 10dbm output (after filtering) for the mixer(s) will be another matter.

 

Best regards to all, keep those soldering irons hot !

 

Regards, Colin de G8LBS.

 

 

 

Sent from Mail for Windows 10

 


Re: PCB delivery

Robin Szemeti - G1YFG
 

Certainly!  I'll build up a couple to check them .. they are more a "contest" HA8ET style LNA than a high gain EME style one. They feature a suitable "notch" on the input for 432 or 144, an output filter for 432 or 144 and a protection relay on the input to try and preserve the LNA when sitting on the end of a relay that may have QRO on the transmit port, a pot is provided on the output so you can set it for just enough gain ... they should fit the standard tinplate boxes.

Let me build them up and get back to you, I have cocked them up, you never know ;)


On Fri, 8 Jan 2021 at 12:48, Paul Randall G3NJV <paulfrandall@...> wrote:
Hi Robin, any lna boards going spare?
Hope you are well
Paul



Sent from my Galaxy



-------- Original message --------
From: Robin Szemeti - G1YFG <robin@...>
Date: 08/01/2021 12:25 (GMT+00:00)
Subject: [UKMicrowaves] PCB delivery

Nice delivery of pcbs today, the 9cm transverter is the one that I'm looking forward to building up.

There is another batch of CANFI noise heads, but my pick and place is in bits at the moment,  i 'll try and sort that, and mount the components, otherwise they'll have to go out as kits.

There are some 2m and 70cm LNA, some mmic boards for a friend and an AIS transceiver for my boat. Plenty of RF  projects to keep me busy.

--
Robin Szemeti - G1YFG


--
Robin Szemeti - G1YFG


WTB: Continental microwave 432MHz 150W PA or similar

Conrad, PA5Y
 

I already have a 50W Continental 432MHz PA, it is very linear. For my new system I need a little bit more power. I understand that there is a 150W version of the Continental amplifiers? Does anyone have one or something similar that they are willing to sell? Main requirement is that it is very linear at around 75W PEP. 

Only tentative enquiry at this stage. I need to get the antennas up first.

73

Conrad PA5Y


Re: PCB delivery

Paul Randall G3NJV
 

Hi Robin, any lna boards going spare?
Hope you are well
Paul



Sent from my Galaxy



-------- Original message --------
From: Robin Szemeti - G1YFG <robin@...>
Date: 08/01/2021 12:25 (GMT+00:00)
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] PCB delivery

Nice delivery of pcbs today, the 9cm transverter is the one that I'm looking forward to building up.

There is another batch of CANFI noise heads, but my pick and place is in bits at the moment,  i 'll try and sort that, and mount the components, otherwise they'll have to go out as kits.

There are some 2m and 70cm LNA, some mmic boards for a friend and an AIS transceiver for my boat. Plenty of RF  projects to keep me busy.

--
Robin Szemeti - G1YFG


PCB delivery

Robin Szemeti - G1YFG
 

Nice delivery of pcbs today, the 9cm transverter is the one that I'm looking forward to building up.

There is another batch of CANFI noise heads, but my pick and place is in bits at the moment,  i 'll try and sort that, and mount the components, otherwise they'll have to go out as kits.

There are some 2m and 70cm LNA, some mmic boards for a friend and an AIS transceiver for my boat. Plenty of RF  projects to keep me busy.

--
Robin Szemeti - G1YFG


Re: Re elevation on a dish

Dave
 

Hello John,
Thanks very much indeed for photos of your system. Yes, I take your point about spacing the dish far away enough to get 30 degrees of elevation. I am torn between using a  waveguide feed or preamp at the feedpoint.
I will look at the limits of the Jack very carefully in the workshop as you suggested. 
If your system has lasted for so long it must be very rugged and well constructed. 
Thanks again for all the pointers.
73
Dave G4GLT. 

On 8 Jan 2021, at 10:55, John Fell <john.g0api@...> wrote:


Hi Dave ,
Had to wait for the frost to lift to take these pics .
My masthead 60cm dish and Elevation system .

18" jack used with base end pivot made from 3" exhaust clamp around the standard Scaf pole mast extension above KR600 inside cage support ( just below bottom of pic).Extra large clamp allows one leg of U bolt to be fitted with a turned alum sleeve spacer to take the eye of the base balljoint of the jack.Also allows positional adjustment to set up desired stroke/maximum dish travel..

Top end of jack fits onto a welded pivot bolt attached to underside of a 2 x 1" steel hollow section , welded or bolted to a steel stand-off plate that has a steel hinge at the mast end .The other end of the hinge is welded to a steel Scaf clamp , which again can be adjusted to setup the final geometry .

The dish is mounted on 1.25" dimeter steel tube that came with it - in this case it is a 90 degree bent item so that is why the 2X1" hollow section is used to offset the dish tube and put the vertical load thrust on the centre line of the vertical mast .Room to add masthead PA/front end housings just behind the dish , without adding much loading to the feed arm etc .

You will notice the system puts the offset dish well forward offset to the mast - this allows the top rim of the dish to travel to an effective 30 degrees of Elevation .
That allows pointing at QO100 and well above ground noise sources for Sun noise  measurements and I have decoded DL0SHF several times over last few years .Other antennas on mast above are positioned to offset the dish system , again putting the vertical loading equally about the rotator cage .

The small box on a standoff 1"x1/8" aluminium flat bar just in front and below dish base  is housing a G4JNT AZ/EL digital sensor .

Which ever system you build make sure the jack is adjusted so its internal limit switches limit the travel within limits that protect the dish - I managed to fold this dish at the top with 12V supply and the only thing I noticed was a sudden rise in ground noise !

After 30+ years up the mast the only thing that needed replacement was the jack ( running leadscrew nut fractured ) -  the light coloured cylinder on the jack is an old aluminium Dow Corning Vacuum oil can - this covers the top end jack seal to prevent rain getting in when/if the seal cracks - smother all surfaces in Waxoil ....

73
John
G0API

On Thu, 7 Jan 2021 at 17:03, Dave via groups.io <davidnewman55=icloud.com@groups.io> wrote:
Hello,
I am adding elevation on a dish for tropo only (not EME) and wondered if anyone has a photo of the mechanics of it, preferably with some sort of hinge . I have an actuator which has a stroke length of 4 inches. I think the lower part of the dish will have to be pushed outwards.
73
Dave G4GLT.





<DSCF7244.JPG>
<DSCF7245.JPG>


Re: Re elevation on a dish

John Fell
 

Hi Dave ,
Had to wait for the frost to lift to take these pics .
My masthead 60cm dish and Elevation system .

18" jack used with base end pivot made from 3" exhaust clamp around the standard Scaf pole mast extension above KR600 inside cage support ( just below bottom of pic).Extra large clamp allows one leg of U bolt to be fitted with a turned alum sleeve spacer to take the eye of the base balljoint of the jack.Also allows positional adjustment to set up desired stroke/maximum dish travel..

Top end of jack fits onto a welded pivot bolt attached to underside of a 2 x 1" steel hollow section , welded or bolted to a steel stand-off plate that has a steel hinge at the mast end .The other end of the hinge is welded to a steel Scaf clamp , which again can be adjusted to setup the final geometry .

The dish is mounted on 1.25" dimeter steel tube that came with it - in this case it is a 90 degree bent item so that is why the 2X1" hollow section is used to offset the dish tube and put the vertical load thrust on the centre line of the vertical mast .Room to add masthead PA/front end housings just behind the dish , without adding much loading to the feed arm etc .

You will notice the system puts the offset dish well forward offset to the mast - this allows the top rim of the dish to travel to an effective 30 degrees of Elevation .
That allows pointing at QO100 and well above ground noise sources for Sun noise  measurements and I have decoded DL0SHF several times over last few years .Other antennas on mast above are positioned to offset the dish system , again putting the vertical loading equally about the rotator cage .

The small box on a standoff 1"x1/8" aluminium flat bar just in front and below dish base  is housing a G4JNT AZ/EL digital sensor .

Which ever system you build make sure the jack is adjusted so its internal limit switches limit the travel within limits that protect the dish - I managed to fold this dish at the top with 12V supply and the only thing I noticed was a sudden rise in ground noise !

After 30+ years up the mast the only thing that needed replacement was the jack ( running leadscrew nut fractured ) -  the light coloured cylinder on the jack is an old aluminium Dow Corning Vacuum oil can - this covers the top end jack seal to prevent rain getting in when/if the seal cracks - smother all surfaces in Waxoil ....

73
John
G0API


On Thu, 7 Jan 2021 at 17:03, Dave via groups.io <davidnewman55=icloud.com@groups.io> wrote:
Hello,
I am adding elevation on a dish for tropo only (not EME) and wondered if anyone has a photo of the mechanics of it, preferably with some sort of hinge . I have an actuator which has a stroke length of 4 inches. I think the lower part of the dish will have to be pushed outwards.
73
Dave G4GLT.






Re: MKU 13 G3 Schematic

Colin Ranson
 

Conrad, I’ll send you a couple.

 

Send me your address please.

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Conrad, PA5Y
Sent: 08 January 2021 09:59
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 

Yes, thanks John I just found them. They are expensive!

 

Can somebody look at their G3 schematic (not G2 I have that) and confirm what the front-end device is? Or better still scan the schematic and let me have a copy, that would be very kind 🙂 Please note G3 not G2. The block diagram on the Kuhne site for the MKU13 G3 indicates a HEMT so it is probably the same as the G2 but before I order some devices, I would like to confirm. I can't remove the device until this evening and would like to order today.

 

Of course, I emailed Khune, but they can be quite slow.

 

73

 

Conrad PA5Y

 

 

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of John Lemay via groups.io <john@...>
Sent: 08 January 2021 10:44
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 

They are listed as available spare parts on Kuhne’s web shop.

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Conrad, PA5Y
Sent: 08 January 2021 09:24
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 

Yes the G2 schematic is available from the Kuhne archives, I suppose what I should have said was. I have the G2 schematic, is the front end the same for the G3? I have a G3. I suspect that the front end is indeed the sane. Which leads me to the next question. Where can I get a few NE32584Cs?

 

73

 

Conrad PA5Y

 

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of DF6NA Rainer via groups.io <df6na@...>
Sent: 08 January 2021 07:04
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 


It's correct !!!

Am 07.01.2021 um 23:40 schrieb Graham G3VKV via groups.io:

    DB6NT 13cms G2 front end FET is an NE32584C

                                                    Graham G3VKV

 

 

Virus-free. www.avg.com

 


Re: MKU 13 G3 Schematic

Conrad, PA5Y
 

Yes, thanks John I just found them. They are expensive!

Can somebody look at their G3 schematic (not G2 I have that) and confirm what the front-end device is? Or better still scan the schematic and let me have a copy, that would be very kind 🙂 Please note G3 not G2. The block diagram on the Kuhne site for the MKU13 G3 indicates a HEMT so it is probably the same as the G2 but before I order some devices, I would like to confirm. I can't remove the device until this evening and would like to order today.

Of course, I emailed Khune, but they can be quite slow.

73

Conrad PA5Y




From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of John Lemay via groups.io <john@...>
Sent: 08 January 2021 10:44
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic
 

They are listed as available spare parts on Kuhne’s web shop.

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Conrad, PA5Y
Sent: 08 January 2021 09:24
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 

Yes the G2 schematic is available from the Kuhne archives, I suppose what I should have said was. I have the G2 schematic, is the front end the same for the G3? I have a G3. I suspect that the front end is indeed the sane. Which leads me to the next question. Where can I get a few NE32584Cs?

 

73

 

Conrad PA5Y

 

 


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of DF6NA Rainer via groups.io <df6na@...>
Sent: 08 January 2021 07:04
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 


It's correct !!!

Am 07.01.2021 um 23:40 schrieb Graham G3VKV via groups.io:

    DB6NT 13cms G2 front end FET is an NE32584C

                                                    Graham G3VKV

 


Virus-free. www.avg.com


Re: MKU 13 G3 Schematic

John Lemay
 

They are listed as available spare parts on Kuhne’s web shop.

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Conrad, PA5Y
Sent: 08 January 2021 09:24
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 

Yes the G2 schematic is available from the Kuhne archives, I suppose what I should have said was. I have the G2 schematic, is the front end the same for the G3? I have a G3. I suspect that the front end is indeed the sane. Which leads me to the next question. Where can I get a few NE32584Cs?

 

73

 

Conrad PA5Y

 

 


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of DF6NA Rainer via groups.io <df6na@...>
Sent: 08 January 2021 07:04
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic

 


It's correct !!!

Am 07.01.2021 um 23:40 schrieb Graham G3VKV via groups.io:

    DB6NT 13cms G2 front end FET is an NE32584C

                                                    Graham G3VKV

 


Virus-free. www.avg.com


Re: MKU 13 G3 Schematic

Conrad, PA5Y
 

Yes the G2 schematic is available from the Kuhne archives, I suppose what I should have said was. I have the G2 schematic, is the front end the same for the G3? I have a G3. I suspect that the front end is indeed the sane. Which leads me to the next question. Where can I get a few NE32584Cs?

73

Conrad PA5Y



From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of DF6NA Rainer via groups.io <df6na@...>
Sent: 08 January 2021 07:04
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] MKU 13 G3 Schematic
 

It's correct !!!

Am 07.01.2021 um 23:40 schrieb Graham G3VKV via groups.io:
    DB6NT 13cms G2 front end FET is an NE32584C

                                                    Graham G3VKV


Re: VAT ... it looks like it's going to be difficult.

Mike Willis
 

"
No problem with that, as others have said, there is no place for racism here or anywhere else, but if you are expecting me to refrain from criticising the extensive VAT and customs fraud committed by traders from the Republic of China, I'm afraid you are going to be sadly disappointed"

In that case I suggest you leave this group as it is not place for politics either.

--
Mike G0MJW


Re: VK3CV 30THz full system demonstration.

Glyn M0XGT
 

Andrew says...

"RX is based on a chip from Melexis, the MLX90614 which operates between approx 5 -14um.

I'm in the process of getting a detailed article written now." 
That makes sense - in the demo the temperature of the TX plate is 115 deg-C, T = 388 K, which puts the spectral peak of the blackbody radiation (Wein’s Law) at a wavelength of lambda = 2.89e-3/T = 7.45 um and frequency  f = 3e8/lambda = 40.2 THz.

Would be interesting to add some extra frequency selectivity with narrowband IR filters, diffraction grids, etc., to resolve wide m-FSK symbols.

Glyn M0XGT 

 


Re: VK3CV 30THz full system demonstration.

Barry Chambers
 

Tim

many thanks

Barry, G8AGN


On 08/01/2021 00:55, Tim, VK2XAX wrote:

Andrew says...

"RX is based on a chip from Melexis, the MLX90614 which operates between approx 5 -14um.

I'm in the process of getting a detailed article written now."

cheers
Tim

On 7/1/21 7:34 pm, Barry Chambers wrote:
Tim

fascinating demo. What is the receive sensor please?

73 Barry, G8AGN


-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA
-- 
73
Barry, G8AGN


Re: MKU 13 G3 Schematic

DF6NA Rainer
 


It's correct !!!

Am 07.01.2021 um 23:40 schrieb Graham G3VKV via groups.io:

    DB6NT 13cms G2 front end FET is an NE32584C

                                                    Graham G3VKV


Re: VK3CV 30THz full system demonstration.

Tim, VK2XAX
 

Andrew says...

"RX is based on a chip from Melexis, the MLX90614 which operates between approx 5 -14um.

I'm in the process of getting a detailed article written now."

cheers
Tim

On 7/1/21 7:34 pm, Barry Chambers wrote:
Tim

fascinating demo. What is the receive sensor please?

73 Barry, G8AGN


-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA


Re: MKU 13 G3 Schematic

Graham G3VKV
 

my mistake the 13 is 1296 not 2320 but I think the device in the G2 is the same on both bands

Graham

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