Hi Alan and tnx for your reply. (also the other stns who confirmed that the pic
was correctly sent now)
A bigger signal? You mean more Drain current? That is possible (up to 75mA for
this Diode) and would be an advantage but also a disadvantage if we think on a
battery supply. The BF862 provides abt 20mA @ Uds=0 (measured out at 4
specimens) which is enough for that application.
And so the circuit is kept really simple and needs not even a measuring device,
except to find the resonance/ adjust the C (but that can be done in Argo)...
:-)
I hope i can give some RX reports soon (changing my QTH from Darmstadt to
Heidelberg this weekend and so not much time...)
73, Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von ALAN MELIA
Gesendet: Sa 30.01.2010 20:39
An: [email protected]
Betreff: Re: LF: 2nd try of sending the pic of my loop preamp with the BF862
Hi Stephan thanks for that I have been wondering about this for some time but
assumed a bigger signal would be required for the LED. I am not really up to
speed with opto-devices.
Alan G3NYK
--- On Sat, 30/1/10, Stefan Schäfer <[email protected]> wrote:
> From: Stefan Schäfer <[email protected]>
> Subject: LF: 2nd try of sending the pic of my loop preamp with the BF862
> To: [email protected]
> Date: Saturday, 30 January, 2010, 19:26
>
>
>
>
>
> Dear LF,
>
> Some OMs informed me, that the picture of
> the loop preamp is in a strange design. That may be come,
> since i (have to) use outlook exchange (?)
>
> Now i try to do it again. Those who asked
> for the picture, please give my a short confirmation if the
> picture is in the correct format now.
>
> I will subscribe to the reflector with
> another email adress soon to solve this problem, sri
> agn.
>
> I do some modifications to the RX in the
> moment and will send the new and perhaps better circuit
> soon. But the setup is already working vy fine!
>
> 73,
> Stefan/DK7FC
<<winmail.dat>>
|
