Thank you.
I used the BFR92 as the BFR92 already. My problem is the BB105 which is not available anymore.
The point with the silvered copper seems reasonable.
I searched the ECM in english and the third contact makes sense. I searched german webpages before and nothing made sense before.
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--- In LTspice@..., "miller_effect" <miller_effect@...> wrote:
Hello CV,
Original reference uses BFR92 which is plenty good enough for this gadget. Per result of 45 sec search, look in Philips catalogs:
(copy entire line sans line breaks)
Regarding silver: they likely mean silvered copper to reduce skin effect losses (improve conductance of the wire surface layer, a common treatment of high-power transmitter hardware).
Regarding microphone: search for electret microphone. You will see it is a capacitor driving a JFET.
ME
--- In LTspice@..., "christianvierck" <christianvierck@> wrote:
Hey guys,
I need some help to simulate my circuit correctly.
I want to simulate a UHF-transmitter and I have problems with three devices in my curcuit.
Here you can see the circuit diagram:
Now the three devices which exasperate me.
1. BB105: I did not find any model for this device. I'm not sure if it's manufacturing stoped. Can someone help me with this? A alternative model or sth.
2. ECM: Like other microphones I used a voltage source in my simulation. Now I'm not sure how to connect it with my curcuit?
3. Silver wire: Can I leave it for a simulation because of the same conductance as a copper wire?
Have a nice day,
CV
