is the Winterhill Rx an active project

[Richard-g8jvm]

Hi
is the Winterhill DATV Rx an active project, ?, that section of the forum is very quiet.
|I noticed the main pcb available and the Serit FTS 4334/LV NIM, but not the LNB PSU pcbs.
Annoyingly , I have a spare Odroid C4, compatible with the RPI4 with a slightly better processor array,
but the GPU is different so raspian unlikely to run on it its also true 64bit ,arm64,. Has the same headers ...
If it is active I'll being buying and building
73 Richard g8jvm

[G4EWJ]

Yes.

The RPi4 is unable to cope with more than one H.265 signal at a time, so WH is best used in Ethernet hub mode, rather than displaying video locally.

The OKR-T/3-W12-C psu module is still available from the usual suppliers and can be used in all three positions. Other components should not be a problem, although many of the part numbers in the BOM are unlikely to be current and alternatives will be required.

I'll let the shop comment on the availability of the lnb supply pcb.

Brian

[Richard-g8jvm]

thanks for the reply,
I've ordered the main pcb and the FTS 4334lv
two questions:-
where do I get the LNB PSU board from??? , and as I'm, only going to use one NIM, I guess only one LNB psu board is required

About to purchase the RPI4B, the 4GB is a reasonable price at £33, or do I need 8GB of RAM, the extra 4 GB is the same as buying two RPI4.

thanks
Richard G8JVM

[g8gtz]

Hi Richard,

We've run out of LNB PSU PCBs - I'll try to do an order this week so will be a couple of weeks before they are back in stock.

BTW - got your order and will put in the post tomorrow.

73
Noel - G8GTZ

[Richard-g8jvm]

Thanks Noel
Brian mentioned the OKR-T/3-W12-C module,, is that being used as a replacement ,? or is it used elsewhere ?, noted that module only has 5 pins and single voltage.

RPI4 is 4GB of RAM enough, hopefully or is the 8GB version ? , then I can get that ordered
73 Richard

[G4EWJ]

The 2GB version of the RPi4 was used at the start of the project.

The output voltage of the OKR modules is configured by external resistors. 5.1, 3.3, 1.1v are required. Originally, other modules in the OKR series with different current ratings were specified, but only the 3A version is generally available now and is fine for all three voltages.

Brian

[Richard-g8jvm]

Thanks Brian
I had a look at the s/w on github, install.sh and update.sh, I'm seriously wondering whether to try my Hardkernel Odroid C4 it has a
compatible 40 pin header, it will run debian buster, 64bit. I could only see 1 line that would have to be changed, that to load the kernel headers.
Its specifications are here:- https://wiki.odroid.com/odroid-c4/hardware/hardware.
probably a mad idea but its sitting unused, I replaced it with several OdroidN2+ devices , so its sitting there waiting for a new use.
73
Richard g8jvm

[Pa3fbx]

Hi, About the LNB PSU boards.

You might consider to create external bias T because when you use multiple receivers you could mix LNB supply and burn out some receiver inputs..
I have a Bias T for all LNB's and use many receivers but no internal PSU..

This also saves lots of money for the original PSU modules witch are very expensive..


Benno
ps and yes, PSU pcb are still available at EU warehouse..

[Richard-g8jvm]

Thanks Benno
I've no problem using an external T, especially if the LNA PSU board is not needed , I use a dual LNB one side is powered directly from the Transceiver
I've built for narrow band use.and that side of the LNB is fitted with a Abracom ATX-11 TCXO. I'm seeing about 200Hz shift with temperature changes during the day. I has however a 37KHz error at final frequency., I've been able to calibrate that out, just waiting for a hot day to see how much the TCXO moves, I may need to GPS lock so if I need to I can use the side with the TCXO for WB and use the GPS locked source on the other side of the LNB.
73 Richard g8jvm

[radiogareth]

That's not that far out really. If you use SDR Console for RX/TX NB it has the ability to lock to the NB beacon - very clever. Ideal if you really don't want to retune as the day/QSO progresses. 37kHz for DATV is not of consequence unless you are chasing the really narrow signals. There is a capability in PD4 to 'calibrate to beacon' which will take care of minor offsets for you.
All 'good fun'....
Gareth