I have samples of the 2N5109 on their way here.
That's the link to the manufacturer's webpage where they offer free
samples. The J310 is also a free sample from Fairchild Semiconductors.
Mike
WE0H
WD2XGI
----- Original Message -----
From: Roelof Bakker
Sent: Friday, January 20, 2006 10:15
AM
Subject: LF: Re: Re: Re: Mini Whip and
local noise
Hello Peter and all,
It seems that this transistor is no
longer available. However, there is no
real need for it as the J310 has
been tested for IP2 and IP3 in the same
test setup. At 12 V and a bias
current of 10 mA the J310 has a IP2 of + 69
dBm and a IP3 of + 33.5 dBm, 1
dB compression point is in excess of + 22
dBm.
Computer simulation
of the J310 has confirmed these figures (or should I say
vice versa?)
Though the active device is important in a whip design, it is
only part of
a system. There is not much use to put much effort into
acchieving the
best possible performance, when this is not necessary for the
reception
system as a whole.
73 Roelof Bakker, pa0rdt
