Sure, Alan.
The commercial unleaded solder are really a problem.
Manual soldering is working surely better, surely if you've got experience.
I've got a couple of wellers too, the WECP20. Unbeatable. The first have
been
Bought when I was 16.... now I'm 39 :)
73
Giorgio.
-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Alan Melia
Inviato: venerdì 21 settembre 2012 12.57
A: [email protected]
Oggetto: LF: Re: R: Homebrew stuff
Mmmmm I cant say I have had that experience. I have built 40 to 50 pcbs for
the Radio Astronomy group I belong to with no problems. I use a hotter tip
and 0.4mm 99.2%Sn solder. Boards (nearly all through-hole) have been in use
for 3 to 4 years and I have no returns due to joint failure. I will agree
60/40 is easier and does look nicer. I think from what I hear the problems
are with commercial "bulk" soldering not manual soldering. Like all things
some skill must be acquired to make a nice job. I use a Weller TCP iron..
Alan
G3NYK
----- Original Message -----
From: "IZ2JGB Giorgio Barinetti" <[email protected]>
To: <[email protected]>
Sent: Thursday, September 20, 2012 11:38 PM
Subject: LF: R: Homebrew stuff
Hi Stefan.
The lead-free solder is working but compared to the leaded one is really
brittle.
Lead give flexibility to the soldered joint.
Anyway if you want to try , buy a suitable tip and use it ony for leaded
free. (like petrol... hi)
Don't mix as they don't match.
73,
Giorgio.
-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Stefan Schäfer
Inviato: venerdì 21 settembre 2012 0.05
A: [email protected]
Oggetto: LF: Homebrew stuff
I like the homebrew suff pictures :-) There is quite individual ways to
build the equipment. Many use the copper plates as a board, i prefer the
breadboard since i grew up with it :-)
That's my todays work, under construction:
https://dl.dropbox.com/u/19882028/LF/SDC1.JPG
An add-on to my LF PA. Guess what it is?! :-)
73, Stefan/DK7FC
PS: What do people think about lead-free solder? I considered to try it
but not sure if this is a good idea...
Am 20.09.2012 22:11, schrieb Roger Lapthorn:
> This evening, my WSPR tests are with the latest version of my homebrew
> transverter, designed to be used with QRP rigs like the FT817 in
> "split" mode. The transmitter operates around 3.7MHz and transverts
> down to either 472 or 500kHz. On RX, the transverter simply passes the
> RX signal through to the FT817 which is used on 472/500kHz. This makes
> for a very simple yet effective design.
>
> I reverted to a double balanced mixer (SBL1 or ADE-1 or similar) for
> the TX mixer and this has made the design very stable and reliable
> now. The PA and ATU coils are air wound in the GW3UEP style on 22mm
> PVC pipe. The whole unit fits in a small plastic box.
>
> Already WSPR reports are coming through from PA, G, GW despite the use
> of my short vertical tuned against a copper water tank ground and
> resonated with a tapped coil on a ferrite rod. Signal levels from some
> suggest CW QSOs should be OK.
>
> Details of the transverter are available on my website and on my blog
> at
>
<http://g3xbm-qrp.blogspot.co.uk/2012/09/472500khz-transverter-finished.html
>.
>
> I hope this little circuit encourages a few newcomers to try the new
> band in due course. For now tests continue on 500kHz and further
> reports would be much appreciated.
>
> 73s
> Roger G3XBM
>
> --
> http://g3xbm-qrp.blogspot.com/
> http://www.g3xbm.co.uk
> https://sites.google.com/site/sub9khz/
> http://qss2.blogspot.com/
>
>
-----
Nessun virus nel messaggio.
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Versione: 2012.0.2221 / Database dei virus: 2441/5281 - Data di rilascio:
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-----
Nessun virus nel messaggio.
Controllato da AVG - www.avg.com
Versione: 2012.0.2221 / Database dei virus: 2441/5282 - Data di rilascio:
20/09/2012
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