Message-ID: <164e69a922e.marcocadeddu@tin.it>
Date: Sun, 29 Jul 2018 17:14:07 +0200 (CEST)
From: "marcocadeddu@tin.it" <marcocadeddu@tin.it>
To:  <rsgb_lf_group@blacksheep.org>
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Subject: R: LF: Transmitting 2200m WSPR-2
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Hi Paul,

nice to read that you din't give up! :-)
Hopefully for the good season also from this side will be ready;-)
Just when the new MF PA was ready, functioning and able to push enough juice to reach the 1W limit the exciter decided to stop :-((
Probably I had to be more patient and attempting to re-sold a TSSOIC IC I ruined the PCB.. I mounted it some years ago with a better sight.. so I had to start not a simple IC replacing but prepare a new PCB for the IC (with P'nP sheet I had to do several attemp to prepare the PCB and again place a new IC but finally I succeed ).
Now the exciter is functioning fine alone and with the LF PAs, but on MF there is apparently a carrier residual (leakage through the FST3253) which is too high so I'm getting RF output also with no modulation..
so more to do..

73 Marco, IK1HSS


----Messaggio originale----
Da: paul@n1bug.com
Data: 29-lug-2018 12.03
A: "rsgb_lf_group@blacksheep.org"<rsgb_lf_group@blacksheep.org>, "rsgb_lf_group@yahoogroups.co.uk"<rsgb_lf_group@yahoogroups.co.uk>, "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands"<lowfer@mailman.qth.net>
Ogg: LF: Transmitting 2200m WSPR-2

During a stormy night I have made final (I hope) changes to the new
amplifier and its power supply.

I am running WSPR now as a test. I will continue, maybe with some
interruptions, for a day or two. So far everything looks very good!

I made a new output transformer which now gives the least amount of
drain ringing I have seen with any version. :-)

Power supply is complete. I made everything as efficient as possible
to minimize use of expensive electricity.

I now have full power and will be ready for some nice QSOs when the
quiet receiving conditions return in a few months. Now I will start
to work on receiving antennas...

73,
Paul N1BUG FN55mf


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Hi Paul,<br><br>nice to read that you din't give up! :-)<br>Hopefully for t=
he good season also from this side will be ready;-)<br>Just when the new MF=
 PA was ready, functioning and able to push enough juice to reach the 1W li=
mit the exciter decided to stop :-((<br>Probably I had to be more patient a=
nd attempting to re-sold a TSSOIC IC I ruined the PCB.. I mounted it some y=
ears ago with a better sight.. so I had to start not a simple IC replacing =
but prepare a new PCB for the IC (with P'nP sheet I had to do several attem=
p to prepare the PCB and again place a new IC but finally I succeed ).<br>N=
ow the exciter is functioning fine alone and with the LF PAs, but on MF the=
re is apparently a carrier residual (leakage through the FST3253) which is =
too high so I'm getting RF output also with no modulation..<br>so more to d=
o..<br><br>73 Marco, IK1HSS<br>
<br>
----Messaggio originale----<br>Da: paul@n1bug.com<br>Data: 29-lug-2018 12.0=
3<br>A: "rsgb_lf_group@blacksheep.org"&lt;rsgb_lf_group@blacksheep.org&gt;,=
 "rsgb_lf_group@yahoogroups.co.uk"&lt;rsgb_lf_group@yahoogroups.co.uk&gt;, =
"Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands"&lt;low=
fer@mailman.qth.net&gt;<br>Ogg: LF: Transmitting 2200m WSPR-2<br><br>During=
 a stormy night I have made final (I hope) changes to the new<br>amplifier =
and its power supply.<br><br>I am running WSPR now as a test. I will contin=
ue, maybe with some<br>interruptions, for a day or two. So far everything l=
ooks very good!<br><br>I made a new output transformer which now gives the =
least amount of<br>drain ringing I have seen with any version. :-)<br><br>P=
ower supply is complete. I made everything as efficient as possible<br>to m=
inimize use of expensive electricity.<br><br>I now have full power and will=
 be ready for some nice QSOs when the<br>quiet receiving conditions return =
in a few months. Now I will start<br>to work on receiving antennas...<br><b=
r>73,<br>Paul N1BUG FN55mf<br><br><br><br>

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