Date   

Re: LO device?

Andy G4JNT
 

RR 
The power of Google
I typed SV2AFN into Google to find the web site address to post, and it gave me the right page in spite of the typo
 


On Sat, 11 May 2019 at 16:30, F1CHF <F1CHF@...> wrote:
SV1AFN not SV2
here
regards,
 
nb :
indeed everything increases !
 
 
 
 
 
-------Message original-------
 
Date : 11/05/2019 15:13:08
Sujet : Re: [UKMicrowaves] LO device?
 
Yes, I've had two of that type (the black PCB) one of another Chinese low cost type (using a green PCB) and at least three of the decent properly made ADF4351 boards by SV2AFN

It was reported om in this group a few years ago - several people found that specific PCB, the black one, had a fake chip where the output divider couldn't go below 16.  Ie it was probably an ADF4350 device although labelled ADF4351.    Fortunately mine was going into a project that only needed to go down to 200MHz so teh fake chip was satisfactory

 The green PCB version was Ok

There are several versions of those cheap Chinese modules, some said to have better decoupling than others.

I'd never buy a Chinese one again, the SV2AFN ones are so much better made, properly decoupled and don't have fake chips.

As for the outpiut quality - it's mostly dependent on the quality of the reference you put in.  Raw 10MHz output from GPSDOs aren't always the best reference for synthesizers.



 


Réf. : Re: [UKMicrowaves] LO device?

F1CHF
 

SV1AFN not SV2
here
regards,
 
nb :
indeed everything increases !
 
 
 
 
 
-------Message original-------
 
Date : 11/05/2019 15:13:08
Sujet : Re: [UKMicrowaves] LO device?
 
Yes, I've had two of that type (the black PCB) one of another Chinese low cost type (using a green PCB) and at least three of the decent properly made ADF4351 boards by SV2AFN

It was reported om in this group a few years ago - several people found that specific PCB, the black one, had a fake chip where the output divider couldn't go below 16.  Ie it was probably an ADF4350 device although labelled ADF4351.    Fortunately mine was going into a project that only needed to go down to 200MHz so teh fake chip was satisfactory

 The green PCB version was Ok

There are several versions of those cheap Chinese modules, some said to have better decoupling than others.

I'd never buy a Chinese one again, the SV2AFN ones are so much better made, properly decoupled and don't have fake chips.

As for the outpiut quality - it's mostly dependent on the quality of the reference you put in.  Raw 10MHz output from GPSDOs aren't always the best reference for synthesizers.



Re: LO device?

Richard <richard@...>
 

the suppliers name should be a clue
Bl***y awful noisy goods
Richard

On Sat, 2019-05-11 at 14:20 +0100, Andy G4JNT wrote:
Ah, didn't look carefully enough.   That's a complete module with controller and OLED
Didn't see its a new version

Not sure I'd ever trust a low cost synth module from China ever again tho.

Not sure I'd trust anything from China these days



On Sat, 11 May 2019 at 14:13, Andy G4JNT via Groups.Io <andy.g4jnt=gmail.com@groups.io> wrote:
Yes, I've had two of that type (the black PCB) one of another Chinese low cost type (using a green PCB) and at least three of the decent properly made ADF4351 boards by SV2AFN

It was reported om in this group a few years ago - several people found that specific PCB, the black one, had a fake chip where the output divider couldn't go below 16.  Ie it was probably an ADF4350 device although labelled ADF4351.    Fortunately mine was going into a project that only needed to go down to 200MHz so teh fake chip was satisfactory

 The green PCB version was Ok

There are several versions of those cheap Chinese modules, some said to have better decoupling than others.

I'd never buy a Chinese one again, the SV2AFN ones are so much better made, properly decoupled and don't have fake chips.

As for the outpiut quality - it's mostly dependent on the quality of the reference you put in.  Raw 10MHz output from GPSDOs aren't always the best reference for synthesizers.



-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: LO device?

Andy G4JNT
 

Ah, didn't look carefully enough.   That's a complete module with controller and OLED
Didn't see its a new version

Not sure I'd ever trust a low cost synth module from China ever again tho.

Not sure I'd trust anything from China these days



On Sat, 11 May 2019 at 14:13, Andy G4JNT via Groups.Io <andy.g4jnt=gmail.com@groups.io> wrote:
Yes, I've had two of that type (the black PCB) one of another Chinese low cost type (using a green PCB) and at least three of the decent properly made ADF4351 boards by SV2AFN

It was reported om in this group a few years ago - several people found that specific PCB, the black one, had a fake chip where the output divider couldn't go below 16.  Ie it was probably an ADF4350 device although labelled ADF4351.    Fortunately mine was going into a project that only needed to go down to 200MHz so teh fake chip was satisfactory

 The green PCB version was Ok

There are several versions of those cheap Chinese modules, some said to have better decoupling than others.

I'd never buy a Chinese one again, the SV2AFN ones are so much better made, properly decoupled and don't have fake chips.

As for the outpiut quality - it's mostly dependent on the quality of the reference you put in.  Raw 10MHz output from GPSDOs aren't always the best reference for synthesizers.




Re: LO device?

Andy G4JNT
 

Yes, I've had two of that type (the black PCB) one of another Chinese low cost type (using a green PCB) and at least three of the decent properly made ADF4351 boards by SV2AFN

It was reported om in this group a few years ago - several people found that specific PCB, the black one, had a fake chip where the output divider couldn't go below 16.  Ie it was probably an ADF4350 device although labelled ADF4351.    Fortunately mine was going into a project that only needed to go down to 200MHz so teh fake chip was satisfactory

 The green PCB version was Ok

There are several versions of those cheap Chinese modules, some said to have better decoupling than others.

I'd never buy a Chinese one again, the SV2AFN ones are so much better made, properly decoupled and don't have fake chips.

As for the outpiut quality - it's mostly dependent on the quality of the reference you put in.  Raw 10MHz output from GPSDOs aren't always the best reference for synthesizers.



2.4 GHz up converter

geoffrey pike
 

Just a quick sweep to show that the 2 filters take care of the LO at 1968 MHz
cheers
Geoff
GI0GDP




LO device?

dave cossar
 

HI Has anyone ever tried one of these from Banggood

 

 

https://uk.banggood.com/Geekcreit-Signal-Generator-Module-35M-4_4GHz-RF-Signal-Source-Frequency-Synthesizer-ADF4351-Development-Board-p-1416998.html?akmClientCountry=GB&gmcCountry=GB&currency=GBP&createTmp=1&utm_source=googleshopping&utm_medium=cpc_bgcs&utm_content=garman&utm_campaign=pla-gbg-ele-pc&gclid=EAIaIQobChMIhYrbnb2M4gIVaLftCh0vxAADEAQYASABEgL36PD_BwE&cur_warehouse=CN

 

 

Dave


Re: Using a M57762 ?

Nick Gregory G0HIK
 

Thanks Ian,
I'll use those ideas.
73s Nick G0HIK


GPS reference for the IC9700

Dave Brown
 

If you're interested in GPS referencing the IC9700, Glen has prototyped a
solution.

http://www.cortexrf.com.au/IC9700lock.html?fbclid=IwAR2QFKFOZ8U_4TpYjxpdYIjE
DlD8JIdhfpglEXoEBn7-4k7tSexgUCwyHCk

73
Dave, ZL3FJ


CQ CQ CQ 3cm 3cm Rain Scatter

G3UVR Denis IO83KH
 

Anybody like to try 3cm RS tonight? Worked G4ZTR on SSB just before Conditions good.

Replay here or meep KST de Denis G3UVR


G8ATB Shack "Thinning"

simonchettle
 

Chaps
 
I need to  “thin” my  shack down and sell items that I will never get round to using.  This will be the first  of several postings.
 
For sale:-
 
2 Spectrain 60 watt O/P boards each contains 3 off  XRF286S  devices
1 Off Spectrain 12 watt board.
 
1 Off Analogue Devices Sample test board containing 1 BLF7G22LS – 250P device – spected at 2110 –2170 MHZ   board  has never been used.  Could be used as single ended or fit a splitters  to both I/P and O/P for the full 250 W  O/P.
 
Offers (reasonable please) off list to my mail address.
 
73s
 
Simon
G8ATB
 
 
 
 


Re: Power amplifier for es'hail ?

Richard <richard@...>
 



Hi
You actually misunderstood the post,but never mind.

RichardOn Fri, 2019-05-10 at 07:37 -0700, G4WIM KT6UK wrote:

Thanks Charles / Richard - ok so it's not me or the tool then.  I'll try some some other free ware to convert.
Failing that I'll generate the design from scratch. Don't wan the PCB shop making a load of scrap !

Regards Tim
-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: Simple 2.4GHz Up converter using devices from the Chipbank

Clive, G3GJA
 

Second that! Many thanks Colin.

 

Clive G3GJA

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of Richard
Sent: 10 May 2019 14:15
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Simple 2.4GHz Up converter using devices from the Chipbank

 

Boards received, good quality and well packaged,

thanks Colin

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Goulton Street Registered in England No.: 3003479
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Re: Power amplifier for es'hail ?

G4WIM KT6UK
 

Thanks Charles / Richard - ok so it's not me or the tool then.  I'll try some some other free ware to convert.
Failing that I'll generate the design from scratch. Don't wan the PCB shop making a load of scrap !

Regards Tim


Re: Simple 2.4GHz Up converter using devices from the Chipbank

geoffrey pike
 

Good job Colin, nice boards
thanks
Geoff
GI0GDP

On Friday, 10 May 2019, 14:16:20 BST, Richard <richard@...> wrote:


Boards received, good quality and well packaged,
thanks Colin


Re: Simple 2.4GHz Up converter using devices from the Chipbank

Richard <richard@...>
 

Boards received, good quality and well packaged,
thanks Colin

_._,_._,_
-- 
 Best wishes /73 
 Richard Bown
 
 Email : richard@...

 HTTP  :  http://www.g8jvm.com
 
 ######################################################################

 Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 
 Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
 QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, 
Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W
 OS: Linux Mint 19.1 x86_64 Tessa, on a Dell Inspiron N5030 laptop
 ######################################################################


Re: Simple 2.4GHz Up converter using devices from the Chipbank

Paul G8AQA
 

Hi Colin,

I have sent £3.50 for a board.
QTHR

73
Paul

On 08/05/2019 16:16, Colin G4EML wrote:
I have now received the PCBs for the 2.4Ghz Up Converter and have built one and checked it worked as the prototype did. 

Price is £2.50 per board and UK postage is £1.00 per order. 
Postage to other countries will be at cost. Please email me for price. 

Please make payment by Paypal to colin@... and don't forget to include you address.

Note the boards do not have provision for the second 2.4Ghz Filter. However it is easy to add this by making a cut in the output track and scraping away some of the solder resist. 
See the groups.io files section for pictures of the assembled board. 

Colin G4EML



Virus-free. www.avg.com


Re: Using a M57762 ?

Ian White
 

Nick,

You can leave the 12V DC on permanently (with a fuse, of course, but it's very unlikely that it will ever blow).

There are ideas for T/R bias switching in the circuit diagram and manual for my 30-60W PA board (http://g4ddk.com/Products.html). This board was designed for 50-432MHz and apart from the lowpass filter it should also work on 1.3GHz.

73 from Ian GM3SEK

On 10/05/2019 09:51, Nick Gregory via Groups.Io wrote:

After seeing yesterdays post it reminded me of a question I have.

I recently bought a hombrew amplifier using two of the these modules. It has been used for ATV so was just the brick on it's own. I would like to use it at the masthead for my portable activities so need to build it up with relays etc.
Do I leave the 12v to these devices on permanently and arrange for the bias supply to come on when the coax relays switch over?

Thankyou

Nick G0HIK
 


Using a M57762 ?

Nick Gregory G0HIK
 

After seeing yesterdays post it reminded me of a question I have.

I recently bought a hombrew amplifier using two of the these modules. It has been used for ATV so was just the brick on it's own. I would like to use it at the masthead for my portable activities so need to build it up with relays etc.
Do I leave the 12v to these devices on permanently and arrange for the bias supply to come on when the coax relays switch over?

Thankyou

Nick G0HIK
 


Exchange my Airspy R2 for an Airspy HF+?

G8FXB
 

Does anyone want to exchange/PX an Airspy HF+ for a very lightly used Airspy R2?
Please reply off-list

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