ADF4351 internal and external voltages.

Discussion about this major DATV Project. See also https://wiki.batc.tv/The_Portsdown_Transmitter
gi3vaf
Posts: 8
Joined: Thu Apr 05, 2018 6:01 pm

Re: ADF4351 internal and external voltages.

Post by gi3vaf » Sun Apr 08, 2018 1:34 am

I have accepted the eBay supplier's offer to send me a new one.

i2NDT
Posts: 40
Joined: Thu Nov 12, 2015 9:26 pm

Re: ADF4351 internal and external voltages.

Post by i2NDT » Sat Apr 14, 2018 8:41 am

well guys...
I ordered two more boards and I collected them today.
as expected the voltage regulator IC was an AMS 1117 5.0
now I would like to make a claim (I order them via Aliexpress).
did someone already made a claim? GI3VAF?
to be consistent with other claims I would like to know what you have written...
being a retired telecom engineer I can prepare a well detailed claim..but I am afraid they will not understand...hahaha


i2NDT Claudio
i2NDT Claudio
Dalmine, Italia

G8GKQ
Site Admin
Posts: 926
Joined: Sun Mar 22, 2009 1:21 pm

Re: ADF4351 internal and external voltages.

Post by G8GKQ » Mon May 07, 2018 11:48 am

I have just received 2 more ADF4351 boards from eBay supplier "industry_mall". These also have 5 volt regulators.....

Dave

g0mjw
Posts: 569
Joined: Sat Sep 20, 2014 9:15 am

Re: ADF4351 internal and external voltages.

Post by g0mjw » Mon May 07, 2018 12:20 pm

G8GKQ wrote:
Mon May 07, 2018 11:48 am
I have just received 2 more ADF4351 boards from eBay supplier "industry_mall". These also have 5 volt regulators.....

Dave
I have just received some 3.3V regulators and replaced the 5V one. I have not tested it yet, apart from verifying the supply is now 3.3V as intended. What are you planning to do with so many regulator boards?

Mike

G8GKQ
Site Admin
Posts: 926
Joined: Sun Mar 22, 2009 1:21 pm

Re: ADF4351 internal and external voltages.

Post by G8GKQ » Mon May 07, 2018 2:40 pm

Hi Mike

I have aspirations to make a 35 MHz - 4 GHz scalar network analyser, and I'm also thinking about a pre-mixer for my spectrum analyser so that I can see 5.6 GHz.

Dave

G4GUO
Posts: 547
Joined: Tue Feb 16, 2010 12:51 pm

Re: ADF4351 internal and external voltages.

Post by G4GUO » Mon May 07, 2018 5:25 pm

Hi Dave,

I bought some ADF5355 boards with the idea of doing something similar for 10 GHz.
I have the required wideband couplers and some HPFs to clean the output but I
am now looking for some affordable MMICs. I got some samples for Mini-circuits
but when I got a quote for Duroid PCBs from China I almost fell out of my chair
they were so expensive in small quantities. The 18 GHz MMICs are only a few
quid each in comparison.

- Charles

G8DKC
Posts: 197
Joined: Thu Jun 28, 2012 9:39 am

Re: ADF4351 internal and external voltages.

Post by G8DKC » Mon May 07, 2018 5:40 pm

Hi Dave,

Having played with divide by chips, yes you can read the frequency and see harmonics.

Including those produced by the divide by chip :)

A few days ago my thoughts were if I can mix 1.300 with 2.108 and get 3.408 then why not reverse and look at 1.5Ghz on Analyser.

May not be perfect but could probably see some sort of DVB-S waveform.

Learn more about mixers and mixing levels etc..

Peter

g0mjw
Posts: 569
Joined: Sat Sep 20, 2014 9:15 am

Re: ADF4351 internal and external voltages.

Post by g0mjw » Mon May 07, 2018 6:44 pm

If you just want to see the DVB-S waveforms, why not use your Pluto as a spectrum analyser?

Mike

G8DKC
Posts: 197
Joined: Thu Jun 28, 2012 9:39 am

Re: ADF4351 internal and external voltages.

Post by G8DKC » Mon May 07, 2018 9:15 pm

Going a tad off topic :)

Good point Mike, didn't think of that, will see how that works out.

Will still play with filters and mixer to build a stand alone down converter to spectrum analyzer.

Also look at 5.665.

P.S Can Tx on Pluto 3.4Ghz 2Ms to give me a fair signal to build the down converter to analyzer.

As Dave's comment lot's of SDR's here, but need new Pc to run them efficiently...

Regards

Peter
Last edited by G8DKC on Tue May 08, 2018 6:50 am, edited 1 time in total.

G8PEF
Posts: 81
Joined: Mon Oct 30, 2017 6:42 pm

Re: ADF4351 internal and external voltages.

Post by G8PEF » Tue May 08, 2018 6:19 am

G4GUO wrote:
Mon May 07, 2018 5:25 pm
...when I got a quote for Duroid PCBs from China I almost fell out of my chair
they were so expensive in small quantities. The 18 GHz MMICs are only a few
quid each in comparison.

- Charles
Charles - have a look at PCB Pool's RF division (RF Pool). I don't know what the Chinese were quoting you, but RF Pool's prices seem to be about 3-4 times what they charge for FR4.

73, John

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