Posts by G4IUG

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I just want to renew and pay online.

Dave

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I sincerely appreciate all the hard work done by AMSAT-DL and last year subscribed and paid 120EUR gladly.

I have by post received a renewal form. I am sorry but I cannot read German and of course Google Translate won't work on paper documents.

Is it possible to resubscribe on line in English please ?

Thanks

Dave G4IUG

Or just buy a 0.1ppm TCXO ?

Or a frequency counter; counting its own reference ?

I would have thought that almost any TX chain would be stable enough ? YMMV

Why would you need to do that ?

OK, that looks good. More of the same but better and an L Band repeater ??

Thanks

Dave

I hear there is a new Paypload of Ham Radio equipment for the ISS ?

Does anyone have any info on this ?

73

Dave

I like it just as it is. Can't think of anything else to say apart from well done chaps !!

73 Dave G4IUG

Wow ! What is it ?

Guys

My receiver Narrow Band IF is 145Mhz with an Icom transceiver. What I would like is a fixed Waterfall Display with a moving cursor from the Icom radio. So that I can look at the whole band on the SDR and tune to anything with the Icom.

Is this possible with a Raspberry Pi ?

Thanks

Dave

There is so much miss-information and confusion here.

Dave

Quote from dj0abr

the ebay picture shows even 5dB, whatever this number means).

That is not its loss.

Dave

Quote from SP3OSJ

The project will be completed soon:

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Where can we buy this from ?

Thanks Dave

It is not because it is a square wave. You need to look at the source on an analiser and on the input and output of the on-chip oscillator gate.

73's

Dave

Would you get image noise though ?

Just a thought about aluminum.

In the 60's you had to use silver plated everything on 2M, at least that is what we were taught by the old boys and the RSGB VHF/UHF manual. I bought into this but eventually discovered it was mostly hearsay and at best only marginal under some circumstances.

So aluminum, just go for it !

Dave G4IUG Ex G8EAO

Quote from DL5CN

I don't see the need to feed LNBs with 12V when only one polarisation is used. It can be reduced until the drop voltage of the regulator is reached.

Very true, however I don't get the virtue of low dissipation ?

Dave

You are going to dissipate power whatever happens, but it's not significant ?

I'm not sure what the issue is here ?

To drop the supply to the TXCO just use a resistor, nothing more.

Changing the feed is either luck or a test gear solution. I measured mine, but then I have a calibrated HP8970B.