Date   

FRANCO 12ghz to 24ghz doubler

Steve G4HTZ
 
Edited

Just received this in the post from Franco ...12ghz to 24ghz doubler for my 24ghz beacon project for south Essex .
i have a vhf design from Ukraine ..12ghz beacon source which is programble with cw ....even I can do that !!
just wondering if anyone has experience of generating 12.024 ghz which can be programmed with a JT4 mode ....otherwise it will just be a cw beacon .....which I guess is better than no beacon .

proposed location is at my daughters qth between Hockley and Rayleigh at about 75m plus a pole asl ...which is quite high for south Essex .

antenna is a slotted waveguide .
anyway if anyone has experience of using the doubler or any other information apart from what’s on Franco webpage please let me know 



--
Steve G4HTZ 
JO01JN60
Great Wakering, Essex 
24ghz 1.8w 80cm dish 

also known to be active occasionally on 70cms DATV 


Re: Kuhne 24 GHz transverter IF

John Lemay
 

Neil

 

Before you get Really Grumpy (darn it, too late!), try the transverter out; Gear that I have from Kuhne requires much less drive than stated, so you may be in luck. Admittedly, I’ve no experience of the 24GHz unit.

 

John G4ZTR

 

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Neil Smith G4DBN
Sent: 19 August 2020 14:45
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Kuhne 24 GHz transverter IF

 

Just because it is popular, doesn't make it less weird though. Just seems like adding unnecessary transmit IMD. I can't imagine a use-case where I'd want to key the transverter from a rig rather than a sequence controller, but I suspect the primary application for their 24 GHz stuff is lovely sepia-tinged nostalgic retro tripod-on-a-hilltop-with-an-817 speakymode rather than EME or home-station terrestrial digimodes with SDRs and it is me that is out of step with commercial reality as usual.

Neil G4DBN

 

On 19/08/2020 14:25, Andy G4JNT wrote:

A single IF port, I guess, is a strongly preferred option, and carrying PTT control with it.   That has become a de-facto standard.   Level, well, yes, it's annoying, but 500mW isn't that much to generate.   Two devices instead of one from the mixer/source, but gain is cheap.

 

 

 

On Wed, 19 Aug 2020 at 14:14, Neil Smith G4DBN <neil@...> wrote:

I asked Kuhne if they could modify the 144 MHz IF input on their 24GHz
transverter so I could drive it with 10-15 dBm, but they declined. I
guess the majority of customers must still be using ancient superhet IF
radios and don't see anything perverse about generating 0.5 to 5W at
144MHz along with lots of nice IMDs, only to dissipate 99% of it in a
resistor.  Also not weird using a single IF port rather than separate
TX/RX sockets.

All this in a £700 transverter which doesn't even have a local oscillator.

Two choices then: Build a very linear but pointless 144MHz PA and
control system to warm up a resistor, or whip the lid off the new
transverter and void yet another warranty by swapping out the dropper
resistor.  Either way I still have to add an unwanted IF changeover
relay.  I have serious misgivings about using the Kuhne kit in my 24G
project at all.  All my other transverters apart from the 13cm one have
been butchered to run separate IF tx/rx, (and even that has had the
attenuator modified) or are Kuhnes already equipped with low-level inputs.

Am I the one who is out of step here, or are they stuck in the era where
an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN

 


Virus-free. www.avg.com


Re: Kuhne 24 GHz transverter IF

Paul G8AQA
 

Not too sure about that Neil but I must confess to using an FT290R on the inherited 24GHz rig.  The next rig will be much better using a K3 and DDK transverter.  Much easier to have separate RX and TX path right up to the feed.  Can't justify an Elad at present.  Should have bought one rather than a KX3.

Paul G8AQA

On 19/08/2020 14:46, Neil Smith G4DBN wrote:

Nah, it's me that is the odd one out Ben!

On 19/08/2020 14:38, militaryoperator via groups.io wrote:
guess the majority of customers must still be using ancient superhet IF 
radios

Am I the one who is out of step here, or are they stuck in the era where
an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN
------------------------------------------

I for one would like to apologize to Neil for being a Luddite and still using superhets and FT817's. 

Another reason why I'm left wondering if this hobby really is for me. 

73, Ben G4BXD




Re: Kuhne 24 GHz transverter IF

Steve G4HTZ
 

I’m surprised that KUHNE don’t offer a low level drive on their transverter modules ....they seem to on their ready built plug in and go transverters .....I use mine ...or will be with a IC-9700 .

anyway be good to get you on 24ghz Neil ....my 24ghz KUHNE system is ready to go on the new mast with a elevation.rotaor...mast is from MM0CUG but is currently under lockdown measures in Aberdeen ....hopefully be arriving mid September now .

I believe G4BAO G3XDY and GOJBA in east Kent are all active from home on 24ghz now ..maybe others ??

QTH here only 3m asl , but sea path into Holland and Belgium....hopefully get some activity from there ?
--
Steve G4HTZ 
JO01JN60
Great Wakering, Essex 
24ghz 1.8w 80cm dish 

also known to be active occasionally on 70cms DATV 


Re: Kuhne 24 GHz transverter IF

Neil Smith G4DBN
 

Nah, it's me that is the odd one out Ben!

On 19/08/2020 14:38, militaryoperator via groups.io wrote:
guess the majority of customers must still be using ancient superhet IF 
radios

Am I the one who is out of step here, or are they stuck in the era where
an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN
------------------------------------------

I for one would like to apologize to Neil for being a Luddite and still using superhets and FT817's. 

Another reason why I'm left wondering if this hobby really is for me. 

73, Ben G4BXD



Re: Kuhne 24 GHz transverter IF

Neil Smith G4DBN
 

Just because it is popular, doesn't make it less weird though. Just seems like adding unnecessary transmit IMD. I can't imagine a use-case where I'd want to key the transverter from a rig rather than a sequence controller, but I suspect the primary application for their 24 GHz stuff is lovely sepia-tinged nostalgic retro tripod-on-a-hilltop-with-an-817 speakymode rather than EME or home-station terrestrial digimodes with SDRs and it is me that is out of step with commercial reality as usual.

Neil G4DBN


On 19/08/2020 14:25, Andy G4JNT wrote:
A single IF port, I guess, is a strongly preferred option, and carrying PTT control with it.   That has become a de-facto standard.   Level, well, yes, it's annoying, but 500mW isn't that much to generate.   Two devices instead of one from the mixer/source, but gain is cheap.



On Wed, 19 Aug 2020 at 14:14, Neil Smith G4DBN <neil@...> wrote:
I asked Kuhne if they could modify the 144 MHz IF input on their 24GHz
transverter so I could drive it with 10-15 dBm, but they declined. I
guess the majority of customers must still be using ancient superhet IF
radios and don't see anything perverse about generating 0.5 to 5W at
144MHz along with lots of nice IMDs, only to dissipate 99% of it in a
resistor.  Also not weird using a single IF port rather than separate
TX/RX sockets.

All this in a £700 transverter which doesn't even have a local oscillator.

Two choices then: Build a very linear but pointless 144MHz PA and
control system to warm up a resistor, or whip the lid off the new
transverter and void yet another warranty by swapping out the dropper
resistor.  Either way I still have to add an unwanted IF changeover
relay.  I have serious misgivings about using the Kuhne kit in my 24G
project at all.  All my other transverters apart from the 13cm one have
been butchered to run separate IF tx/rx, (and even that has had the
attenuator modified) or are Kuhnes already equipped with low-level inputs.

Am I the one who is out of step here, or are they stuck in the era where
an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN




Re: Kuhne 24 GHz transverter IF

militaryoperator
 

guess the majority of customers must still be using ancient superhet IF 
radios

Am I the one who is out of step here, or are they stuck in the era where
an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN
------------------------------------------

I for one would like to apologize to Neil for being a Luddite and still using superhets and FT817's. 

Another reason why I'm left wondering if this hobby really is for me. 

73, Ben G4BXD


Re: Kuhne 24 GHz transverter IF

Andy G4JNT
 

A single IF port, I guess, is a strongly preferred option, and carrying PTT control with it.   That has become a de-facto standard.   Level, well, yes, it's annoying, but 500mW isn't that much to generate.   Two devices instead of one from the mixer/source, but gain is cheap.



On Wed, 19 Aug 2020 at 14:14, Neil Smith G4DBN <neil@...> wrote:
I asked Kuhne if they could modify the 144 MHz IF input on their 24GHz
transverter so I could drive it with 10-15 dBm, but they declined. I
guess the majority of customers must still be using ancient superhet IF
radios and don't see anything perverse about generating 0.5 to 5W at
144MHz along with lots of nice IMDs, only to dissipate 99% of it in a
resistor.  Also not weird using a single IF port rather than separate
TX/RX sockets.

All this in a £700 transverter which doesn't even have a local oscillator.

Two choices then: Build a very linear but pointless 144MHz PA and
control system to warm up a resistor, or whip the lid off the new
transverter and void yet another warranty by swapping out the dropper
resistor.  Either way I still have to add an unwanted IF changeover
relay.  I have serious misgivings about using the Kuhne kit in my 24G
project at all.  All my other transverters apart from the 13cm one have
been butchered to run separate IF tx/rx, (and even that has had the
attenuator modified) or are Kuhnes already equipped with low-level inputs.

Am I the one who is out of step here, or are they stuck in the era where
an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN





Kuhne 24 GHz transverter IF

Neil Smith G4DBN
 

I asked Kuhne if they could modify the 144 MHz IF input on their 24GHz transverter so I could drive it with 10-15 dBm, but they declined. I guess the majority of customers must still be using ancient superhet IF radios and don't see anything perverse about generating 0.5 to 5W at 144MHz along with lots of nice IMDs, only to dissipate 99% of it in a resistor.  Also not weird using a single IF port rather than separate TX/RX sockets.

All this in a £700 transverter which doesn't even have a local oscillator.

Two choices then: Build a very linear but pointless 144MHz PA and control system to warm up a resistor, or whip the lid off the new transverter and void yet another warranty by swapping out the dropper resistor.  Either way I still have to add an unwanted IF changeover relay.  I have serious misgivings about using the Kuhne kit in my 24G project at all.  All my other transverters apart from the 13cm one have been butchered to run separate IF tx/rx, (and even that has had the attenuator modified) or are Kuhnes already equipped with low-level inputs.

Am I the one who is out of step here, or are they stuck in the era where an FT-817 (or IC-202?) was the state of the art for IF radios?

Neil G4DBN


Re: Black ADF4351

Rien Eradus PA0JME
 

Colin, it is just software, all the essential code is in the setup.  To have minimum jitter I tried to have integer only division

The mainloop iust checks for loss of lock and provides blinking my Hor/Vert bicolour led.

Hor/Vert is sensed by monitoring the LNB voltage via A0 input and the leds are driven via D2 and D3, all of this might be superfleous to your application

If have three outputs programmed, one for 24MHz , the next for 40MHz and the 3rd for either FT817 (22.625MHz) or RTLstick (28.8MHz) or 15625Hz(old TV sync frequency as a possible PLL locking my old ZDF receiver based frequency reference based on my HP5245L counter with it's beautifull 1 MHz glass Xtal).

If yoy have any questions pleas feel free.

Best regards Rien PA0JME

Op 19-8-2020 om 12:55 schreef Colin Ranson:

Dear Rien,

 

Thank you. I was wondering if that was possible to use 10MHz from GPS, which I have.   Any circuit changes needed or is it just software ?

 

Please be kind enough to provide code and pics ?   g8lbs@...

 

Thank you.  73’s

 

 

Colin de G8LBS

 

Sent from Mail for Windows 10

 

From: Rien Eradus PA0JME
Sent: 19 August 2020 11:23
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Black ADF4351

 

Colin I have changed the Si5351 board a bit to have a 10 MHz reference input. You need to pop off the installed XO of course. Then stability seems OK (i use it to synchronise my QO100 LNB and my Pluto with it) The spectrum is quit a mess so if have put filters behind it with 2x24 MHz Xtals and 2x40 MHz Xtals as a half lattice filter to clean it up.

Control is by an arduino, I can share the code or a photo of the setup, I built one for Wim ON5KTO aswell

Regards Rien PA0JME

Op 18-8-2020 om 23:45 schreef Colin Ranson:

Andy,

 

I’m shortly, with a programmers help, to try an Si 5351A clock generator (8khz to 160MHz) programmed with an UNO.   The Si 5351A has a 25MHz on board reference that may, or may not be, accurate or stable but I do have a 25MHz GPS disciplined source to tame it if its not too good in that respect.

 

Keep up the good stuff on here, wish I’d joined the group long before.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 18 August 2020 21:27
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Black ADF4351

 

IIRC, the ones labelled "Eval" are essentially copies of the AD board, so probably quite well designed.if they've used the proper components (which thay probably haven't)

 

 

Andy

 

 

 

On Tue, 18 Aug 2020 at 21:21, geoffrey pike via groups.io <gi0gdp=yahoo.co.uk@groups.io> wrote:

Hi Rien,

OK there are maybe 2 or more versions of the blackboard pcbs mine have ADF4351X EVAL Board 2020_1_v1.4 

written on top left. Surprisingly the spectrum of these boards is good at the frequencies i have needed to use,

106.5 MHz , 1.8 and 4.4 GHz., don't forget the SV1 boards need 3v3 supply as there is no on board reg

cheers

Geoff

GI0GDP

 

On Tuesday, 18 August 2020, 18:11:00 BST, Rien Eradus PA0JME <pa0jme1952@...> wrote:

 

 

Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:

A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the

SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it

Geoff

GI0GDP

 

 


CANFI noise heads ...

Robin Szemeti - G1YFG
 

I have ordered a bunch of PCBs to make some noise heads for the CANFI noise figure meter.  They should be here in a week or so.

I have plenty of spare boards as it was just as cheap to order 50 as it was to order 5.

If anyone wants a few, can they PM me their address, and I'll pop them in the mail when they arrive. If the "chip bank" wants the remainder I can send them along.

image.png




--
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.

--
Robin Szemeti - G1YFG


Re: Black ADF4351

Colin Ranson
 

Dear Rien,

 

Thank you. I was wondering if that was possible to use 10MHz from GPS, which I have.   Any circuit changes needed or is it just software ?

 

Please be kind enough to provide code and pics ?   g8lbs@...

 

Thank you.  73’s

 

 

Colin de G8LBS

 

Sent from Mail for Windows 10

 

From: Rien Eradus PA0JME
Sent: 19 August 2020 11:23
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Black ADF4351

 

Colin I have changed the Si5351 board a bit to have a 10 MHz reference input. You need to pop off the installed XO of course. Then stability seems OK (i use it to synchronise my QO100 LNB and my Pluto with it) The spectrum is quit a mess so if have put filters behind it with 2x24 MHz Xtals and 2x40 MHz Xtals as a half lattice filter to clean it up.

Control is by an arduino, I can share the code or a photo of the setup, I built one for Wim ON5KTO aswell

Regards Rien PA0JME

Op 18-8-2020 om 23:45 schreef Colin Ranson:

Andy,

 

I’m shortly, with a programmers help, to try an Si 5351A clock generator (8khz to 160MHz) programmed with an UNO.   The Si 5351A has a 25MHz on board reference that may, or may not be, accurate or stable but I do have a 25MHz GPS disciplined source to tame it if its not too good in that respect.

 

Keep up the good stuff on here, wish I’d joined the group long before.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 18 August 2020 21:27
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Black ADF4351

 

IIRC, the ones labelled "Eval" are essentially copies of the AD board, so probably quite well designed.if they've used the proper components (which thay probably haven't)

 

 

Andy

 

 

 

On Tue, 18 Aug 2020 at 21:21, geoffrey pike via groups.io <gi0gdp=yahoo.co.uk@groups.io> wrote:

Hi Rien,

OK there are maybe 2 or more versions of the blackboard pcbs mine have ADF4351X EVAL Board 2020_1_v1.4 

written on top left. Surprisingly the spectrum of these boards is good at the frequencies i have needed to use,

106.5 MHz , 1.8 and 4.4 GHz., don't forget the SV1 boards need 3v3 supply as there is no on board reg

cheers

Geoff

GI0GDP

 

On Tuesday, 18 August 2020, 18:11:00 BST, Rien Eradus PA0JME <pa0jme1952@...> wrote:

 

 

Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:

A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the

SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it

Geoff

GI0GDP

 

 


Re: Black ADF4351

Rien Eradus PA0JME
 

Colin I have changed the Si5351 board a bit to have a 10 MHz reference input. You need to pop off the installed XO of course. Then stability seems OK (i use it to synchronise my QO100 LNB and my Pluto with it) The spectrum is quit a mess so if have put filters behind it with 2x24 MHz Xtals and 2x40 MHz Xtals as a half lattice filter to clean it up.

Control is by an arduino, I can share the code or a photo of the setup, I built one for Wim ON5KTO aswell

Regards Rien PA0JME

Op 18-8-2020 om 23:45 schreef Colin Ranson:

Andy,

 

I’m shortly, with a programmers help, to try an Si 5351A clock generator (8khz to 160MHz) programmed with an UNO.   The Si 5351A has a 25MHz on board reference that may, or may not be, accurate or stable but I do have a 25MHz GPS disciplined source to tame it if its not too good in that respect.

 

Keep up the good stuff on here, wish I’d joined the group long before.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 18 August 2020 21:27
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Black ADF4351

 

IIRC, the ones labelled "Eval" are essentially copies of the AD board, so probably quite well designed.if they've used the proper components (which thay probably haven't)

 

 

Andy

 

 

 

On Tue, 18 Aug 2020 at 21:21, geoffrey pike via groups.io <gi0gdp=yahoo.co.uk@groups.io> wrote:

Hi Rien,

OK there are maybe 2 or more versions of the blackboard pcbs mine have ADF4351X EVAL Board 2020_1_v1.4 

written on top left. Surprisingly the spectrum of these boards is good at the frequencies i have needed to use,

106.5 MHz , 1.8 and 4.4 GHz., don't forget the SV1 boards need 3v3 supply as there is no on board reg

cheers

Geoff

GI0GDP

 

On Tuesday, 18 August 2020, 18:11:00 BST, Rien Eradus PA0JME <pa0jme1952@...> wrote:

 

 

Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:

A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the

SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it

Geoff

GI0GDP

 


Re: GB3SCX spotted on 10368MHz - Beaconspot.uk (DXC spot)

Chris Bartram G4DGU
 

A correction:

On 19/08/2020 00:08, Chris Bartram G4DGU wrote:
'I lived in IO70TV for over ten years' should have read: 'I lived in IO71SV ...' (That was a site which I chose after a long search and much path analysis. Apart from sectors in the NE and W I had horizons of <1deg in all the important directions. It was very effective and I worked a lot of good DX on the bands above 144MHz with typical 'flat band' troposcatter ranges of ~500km on VHF - 1.3GHz. I also had more-or less continuous AS from PI7CIS/70cm via the 'stacks to the north of London. The Black Mountain at 40km subtended <1degree.)
73

Chris G4DGU


Re: GB3SCX spotted on 10368MHz - Beaconspot.uk (DXC spot)

Chris Bartram G4DGU
 

Hello Neil,

I'm in IO93NR08. The path has to get over that big lump SSE of Rhayader, and the one near Roger's place at The DX Shop. Other than that, just a couple of lumps in Derbyshire/Staffs and some close calls between you and Rhayader.  From this end it is LOS to 66km, then a ridge at 100km, then just about clear out to Roger's.  The hard bit is the last 25km to you of course.
Just a quick comment. The 'workhorse' propagation mechanism which we use in the 100 - 500km range at 10GHz is troposcatter. With that local obstructions at the end point determine the path losses. Scattering takes place quite high in the troposphere. Knowing the territory around SW Wales (I lived in IO70TV for over ten years) I suggest that Clive's limiting factor is his local topography, and obstructions in mid-Wales (where I've also lived for a few years) aren't likely to play much part in the process.

Diolch yn fawr am ysgrifau Rhaedr Gwy! Da iawn! Dwi'n gybod y Dre ac tafarnnau! (No rude comments from Welsh speakers, please - I know it's iaith dysgwr -it's been a long while since I had regular contact with the language!)

73/Hwyl Fawr!

Chris G4DGU


Re: Black ADF4351

Colin Ranson
 

Andy,

 

I’m shortly, with a programmers help, to try an Si 5351A clock generator (8khz to 160MHz) programmed with an UNO.   The Si 5351A has a 25MHz on board reference that may, or may not be, accurate or stable but I do have a 25MHz GPS disciplined source to tame it if its not too good in that respect.

 

Keep up the good stuff on here, wish I’d joined the group long before.

 

Regards

 

Colin de G8LBS.

 

Sent from Mail for Windows 10

 

From: Andy G4JNT
Sent: 18 August 2020 21:27
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] Black ADF4351

 

IIRC, the ones labelled "Eval" are essentially copies of the AD board, so probably quite well designed.if they've used the proper components (which thay probably haven't)

 

 

Andy

 

 

 

On Tue, 18 Aug 2020 at 21:21, geoffrey pike via groups.io <gi0gdp=yahoo.co.uk@groups.io> wrote:

Hi Rien,

OK there are maybe 2 or more versions of the blackboard pcbs mine have ADF4351X EVAL Board 2020_1_v1.4 

written on top left. Surprisingly the spectrum of these boards is good at the frequencies i have needed to use,

106.5 MHz , 1.8 and 4.4 GHz., don't forget the SV1 boards need 3v3 supply as there is no on board reg

cheers

Geoff

GI0GDP

 

On Tuesday, 18 August 2020, 18:11:00 BST, Rien Eradus PA0JME <pa0jme1952@...> wrote:

 

 

Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:

A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the

SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it

Geoff

GI0GDP

 


Re: Black ADF4351

Andy G4JNT
 

IIRC, the ones labelled "Eval" are essentially copies of the AD board, so probably quite well designed.if they've used the proper components (which thay probably haven't)




On Tue, 18 Aug 2020 at 21:21, geoffrey pike via groups.io <gi0gdp=yahoo.co.uk@groups.io> wrote:
Hi Rien,
OK there are maybe 2 or more versions of the blackboard pcbs mine have ADF4351X EVAL Board 2020_1_v1.4 
written on top left. Surprisingly the spectrum of these boards is good at the frequencies i have needed to use,
106.5 MHz , 1.8 and 4.4 GHz., don't forget the SV1 boards need 3v3 supply as there is no on board reg
cheers
Geoff
GI0GDP

On Tuesday, 18 August 2020, 18:11:00 BST, Rien Eradus PA0JME <pa0jme1952@...> wrote:


Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:
A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the
SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it
Geoff
GI0GDP


Re: Black ADF4351

geoffrey pike
 

Hi Rien,
OK there are maybe 2 or more versions of the blackboard pcbs mine have ADF4351X EVAL Board 2020_1_v1.4 
written on top left. Surprisingly the spectrum of these boards is good at the frequencies i have needed to use,
106.5 MHz , 1.8 and 4.4 GHz., don't forget the SV1 boards need 3v3 supply as there is no on board reg
cheers
Geoff
GI0GDP

On Tuesday, 18 August 2020, 18:11:00 BST, Rien Eradus PA0JME <pa0jme1952@...> wrote:


Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:
A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the
SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it
Geoff
GI0GDP


Re: Black ADF4351

Rien Eradus PA0JME
 

Hi Geoff,
strange my blackboards have CE tied with 10k to 3V3 and 12k to GND, thus biasing just above half Vdd, effectively creating a high on the CE input.
Btw have seen many variations on that subject. Working with two resistors eases the interface to 5V arduino logic. My SV1AFN boards arrived yesterday and I had no opportunity yet to test them
I can confirm noisy outputs from the chinese boards and I tend to filter the external 10MHz reference using a cheap 10 MHz quartz

Best regards Rien PA0JME

Op 18-8-2020 om 17:31 schreef geoffrey pike via groups.io:

A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the
SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it
Geoff
GI0GDP


Black ADF4351

geoffrey pike
 

A few days ago i asked about anyone having problems with these boards, the CE line floats, whilst the
SV1AFN boards have it tied to 3v3 .Anyway a 10K resistor sorted it
Geoff
GI0GDP

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