Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

need help designing 6 meter amp trigger

Status
Not open for further replies.

CJD1

Newbie level 1
Joined
Jan 26, 2002
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
9
I am trying to design a amp trigger at 6 meters. I intent is to create a trigger circuit via the coax at the load back to the amp. Maybe having a choke in series with a cap and resistor which is tied to ground, then using a switch short the choke to ground by passing the cap and resistor. Then on the output stage of the amp sense the change and forward bias a switching transistor. The coax to the load would only be several feet long and the amp produces around 100 watts. :roll:
 

flatulent

Advanced Member level 5
Joined
Jul 19, 2002
Messages
4,629
Helped
489
Reputation
980
Reaction score
150
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
Bias T

You can use what is commonly known as a Bias T. You put a capacitor in series with the center conductor and a choke in parallel with it. The DC on the choke only goes down the line that is not in series with the capacitor.

Your description is very much like this.
 

S

sick_man

Guest
you need to add some 1n4148's as a clamp to develop some voltage to use to switch the switching transistors
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top