Thanks Tony,
Agreed the 2N5109 will be around for a long time however as you point out
they are or will be very expensive. At present I use 100's of 2N3866
transistors which are very close to the same die if not selected from the
2N5109 process. My cost in 100 quantity has gone from about
With in-ground, which optimally should be be so shallow as to be on-ground,
radials there's no thought or effort needed to think about them as being
anything close to the intended radiation frequency.
But with elevated radials my understanding, and it is more nonexistent than
limited because
The 2N5109 will be around for many years. It is widely used in the military and
space community. It is listed as a JAN part. But it ain't cheap.
73,
N2TK, Tony
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Lee STRAHAN
Sent: Sunday, July 01, 2018
Hi Carl,
One advantages of going underground. No more wires hanging up in the air. It
will look cleaner. But I do not have any idea if my signal will degrade
going with buried radials over the 5 elevated radials at each feedpoint. The
ice was brutal this past winter.
Why do you say there will be a
Hello Martin and all,
The 2N3553 device was plagued with a low Ft (high at its introduction)
making it mostly a low frequency device with questionable high gain high
frequency use in typical ham preamps. It is no longer available through the
original manufacturers. Also perhaps you are
On 7/1/2018 9:50 AM, Martin Kratoska wrote:
The 2N3553 is a brutal 7 watt device in a TO-39 metal package. Chris
Trask, N7ZMY mentioned some unparalleled IM characterics
I used one of these 40 years ago to build a 95 MHz power oscillator
to excite a rubidium plasma lamp in an HP rubidium
The 2N3553 is a brutal 7 watt device in a TO-39 metal package. Chris
Trask, N7ZMY mentioned some unparalleled IM characterics
'... The BFQ19 (made by NXP née Philips) and the NE46134 (made by NEC)
are both highly popular within the CATV industry, and are virtually
identical in terms of
