Interesting
You mean one transformer for each mosfet ?
Like this?
https://www.dropbox.com/s/ssg9bgc6pvqszg0/IMG_20190604_104826_324.jpg?dl=0
Best regards
Luis
-----Mensaje original-----
De: [email protected]
[mailto:[email protected]] En nombre de DK7FC
Enviado el: lunes, 03 de junio de 2019 22:03
Para: [email protected]
Asunto: Re: LF: LF daylight test close to the north hemisphere solstice
Hi Luis,
Maybe use two transformers in series, just to rise the isolation voltage and
reduce the capacity between PA and antenna further :-)
BTW on MF you can make some TA crossings during this time of the year, along
the grey-line, which is just a short time period. It worked many time in the
past for me.
Worth to ris ethe TX percentage to something close to 100% for that short time
period ( ~ 30 minutes maybe).
Good luck.
73, Stefan
Am 02.06.2019 21:59, schrieb VIGILANT Luis Fernández:
> Hi LF
>
> Thank you for the reports Chris. Very interesting
>
> I have switched to WSPR-2 as could be running Tx last night and there
> are more monitors. Conditions are getting harder but still some spots
> from SM3LMN during the night
>
> Clearly the hardest time is just before sunset were sometimes I can
> get no spots even from western stations as EB8ARZ. A bit later after
> sunset SV8CS and SV8RV start spotting from the east. And later spots
> from northern latitudes start again
>
> This week I should have to rework the PA output transformer. The one
> in use lacks good isolation and get arcs when pushing it a bit. All
> going Ok may be I can still rise some dB
>
> 73 de Luis
> EA5DOM
> ________________________________________
> De: [email protected]
> [[email protected]] en nombre de Chris Wilson
> [[email protected]]
> Enviado: viernes, 31 de mayo de 2019 18:04
> Para: VIGILANT Luis Fernández
> Asunto: Re: LF: LF daylight test close to the north hemisphere
> solstice
>
> Hello Luis,
>
> Plenty of WSPR15 spots here, but for some reason they are not
> uploading to the reporter map / database, despite restarting WSPR15
>
> 2145 -9 0.1 0.137604 0 EA5DOM IM98 30
> 1015 -18 -0.2 0.137603 0 EA5DOM IM98 30
> 1045 -18 0.1 0.137603 0 EA5DOM IM98 30
> 1115 -17 -0.2 0.137603 0 EA5DOM IM98 30
> 1145 -16 -0.2 0.137603 0 EA5DOM IM98 30
> 1215 -20 -0.2 0.137603 0 EA5DOM IM98 30
> 1245 -21 -0.2 0.137603 0 EA5DOM IM98 30
> 1315 -19 0.1 0.137603 0 EA5DOM IM98 30
> 1345 -21 0.1 0.137604 0 EA5DOM IM98 30
> 1415 -18 -0.2 0.137603 0 EA5DOM IM98 30
> 1445 -18 -0.2 0.137603 0 EA5DOM IM98 30
> 1515 -20 -0.2 0.137604 0 EA5DOM IM98 30
> 1545 -21 -0.2 0.137604 1 EA5DOM IM98 30
>
> Thursday, May 30, 2019, 9:52:43 AM, you wrote:
>
>
>>
>>
>> Hi LF
>>
>>
>>
>> Apart from cheking that blacksheep is still running ;-)
>>
>>
>>
>> Just a notification to LFMEN
>>
>> I'm transmitting WSPR-2 during daylight to check conditions as we
>> approach summer solstice here
>>
>> About 2,7A RF current normally
>>
>>
>>
>> The PA is still down at home, so switched off at night. But then I
>> can use the 90m vertical for RX
>>
>> QRM is high but overall is a very good performer. I can report Chris
>> 2E0ILY with nice signals and also others which
>>
>> unfortunately don't transmit during best night hours. This reports
>> can be seen spotted as EA5DOM/3
>>
>> There is a permanent 24/7 Rx using MiniWhip with poorer Rx spotting
>> as EA5DOM/2
>>
>>
>>
>> As conditions get worse during daylight I will switch to WSPR-15 and
>> hope to get somebody reporting there in
>>
>> the forgotten mode
>>
>>
>>
>> 73 de Luis
>>
>> EA5DOM
>>
>>
>>
>>
>>
>>
>
> --
> Best regards,
> Chris mailto:[email protected]
>
>
>
>
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