Hi Stefan!
I don't know the problem yet. Maybe these small fets went to hot.
My pa design is very simple, 2 x irf 540 parallel in class D, transformer to 50
ohm, Pi filter and variometer.
Operating voltage was 12 V only but nevertheless resulting an Input of 120
watts.
Beside this trouble with my pa this weekend was really successful for me and I
thank all stations who sent me rprts!
Vy 73
Df5qg
Christian Groeger
Stefan Schäfer <[email protected]> schrieb:
>Hi Christian,
>
>Ah, that explains the long and deep QSB ;-)
>At least these FETs are quiet cheap.
>What is your PA design and operating voltage? Do you know what the
>problem has been? Overvoltage or overheat?
>
>73, cu sn.
>
>PS: Tnx for the report.
>
>Am 10.09.2012 00:03, schrieb C. Groeger:
>> Hello Stefan,
>> Sorry, my tx broke down, I had to stop.
>> You were here 599 as strong as Wolf df0wd who is my mf neighbour!
>> I'll Call you again next week with new mos fets...
>>
>> 73
>> Df5qg
>>
>> Christian Groeger
>>
>> Stefan Schäfer<[email protected]> schrieb:
>>
>>
>>> I'll join in too, soon. My temporary MF grabber is at
>>> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_MF_Grabber.html,
>>> active during i am active...
>>>
>>> 73, Stefan
>>>
>>> Am 09.09.2012 21:24, schrieb C. Groeger:
>>>
>>>> Ok, mal...give me 10 minutes, I'll be there!
>>>>
>>>> Christian Groeger
>>>>
>>>> mal hamilton<[email protected]> schrieb:
>>>>
>>>>
>>>>
>>>>> Christian
>>>>> Looking out for you at present on 472.5 but nil hrd so far. Just had a QSO
>>>>> with DF0WD
>>>>> 73 De mal/g3kev
>>>>>
>>>>>
>>>
>
|
