|Subject:||R: LF: Transmitting 2200m WSPR-2|
|From:||"[email protected]" <[email protected]>|
|Date:||Sun, 29 Jul 2018 17:14:07 +0200 (CEST)|
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
Da: [email protected]
Data: 29-lug-2018 12.03
A: "[email protected]"<[email protected]>, "[email protected]"<[email protected]>, "Discussion of the Lowfer (US, European, & UK) and MedFer bands"<[email protected]>
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...
Paul N1BUG FN55mf
|<Prev in Thread]||Current Thread||[Next in Thread>|
|Previous by Date:||Re: VLF: Earth antenna transmissions on a guide rail?!?? 2nd day..., DK7FC|
|Next by Date:||Re: VLF: Earth antenna transmissions on a guide rail?!?? 2nd day..., DK7FC|
|Previous by Thread:||LF: Transmitting 2200m WSPR-2, N1BUG|
|Next by Thread:||LF: Earth antenna transmissions using sea water, LA5VNA|
|Indexes:||[Date] [Thread] [Top] [All Lists]|