http://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/ Tue, 02 Dec 2008 19:37:54 +0000 http://wordpress.org/?v=2.5.1 http://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/#comment-961 RF Preamplifier by 2N2219a , 2N4427 , 2N3553 | วงจร โครงงาน อิเล็กทรอนิกส์ Sat, 20 Sep 2008 00:24:45 +0000 http://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/#comment-961 [...] Input needs only several mWatts (e.g. BF900) -> 300 mWatts OUT. This schematic is a often used buffer. It’s easy to build, clean and cheap. When you want even more power, you can replace the 2N2219a by a 2N4427 or 2N3553. วงจร RF Pre Amplifier ด้วยทรานซิสเตอร์ อ่านต่อ [...] [...] Input needs only several mWatts (e.g. BF900) -> 300 mWatts OUT. This schematic is a often used buffer. It’s easy to build, clean and cheap. When you want even more power, you can replace the 2N2219a by a 2N4427 or 2N3553. วงจร RF Pre Amplifier ด้วยทรานซิสเตอร์ อ่านต่อ [...]

]]> http://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/#comment-220 3553 Mon, 02 Jun 2008 12:40:33 +0000 http://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/#comment-220 [...] You can lower the output by adding a little resistor 10..47 Ohm 1/2W in the emitter line of thttp://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/Molten globules move into action -- Regan 100 7: 3553 ...Published online on March 25, 2003, [...] [...] You can lower the output by adding a little resistor 10..47 Ohm 1/2W in the emitter line of thttp://www.elecfree.com/electronic/rf-preamplifier-by-2n2219a-2n4427-2n3553/Molten globules move into action — Regan 100 7: 3553 …Published online on March 25, 2003, [...]

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