The AM Forum
April 26, 2024, 12:59:54 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
« previous next »
  Print  
Author Topic: 40 meter Class D  (Read 2119 times)
0 Members and 1 Guest are viewing this topic.
WO1U
Member

Offline Offline

Posts: 12
« on: March 10, 2024, 12:11:15 PM »
Hi,

Attached is a PDF design for a 1/2 Bridge VMCD amplifier with test data. I hope someone finds it useful.

73
Mike
* Halfbridge_Amp.pdf (4147.22 KB - downloaded 114 times.)
Logged
kb3ouk
Member

Offline Offline

Posts: 1640

The Voice of Fulton County
« Reply #1 on: March 12, 2024, 09:17:06 PM »
What, if any, components are frequency dependent? I'm assuming C1 and L1 and L3, C5, and C6 form input and output tuned circuits. Looks like a very simple design to put on the air, especially since it would be nice to have a rig that can put out some power on 40 without the heat for summer time use.
Logged
Clarke's Second Law: The only way of discovering the limits of the possible is by venturing a little past them into the impossible
WO1U
Member

Offline Offline

Posts: 12
« Reply #2 on: March 24, 2024, 04:48:43 PM »
Hi Shelby,

The band specific components are L1, C1, L3, C6.  L1C1 is for VSWR reduction, and L3C6 are tuned impedance matching. You should be able to scale this to lower bands using values with the same reactance on the desired band. I doubt you could get higher than 40m with these devices.

Hope this helps,

73

Mike
Logged
Pages: [1]   Go Up
  Print  
The AM Forum  > AMfone's Online AM Handbook > Transmitters > Topic: 40 meter Class D
 « previous next »
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.038 seconds with 19 queries.