100 Watt Linear Amp TIP120 driver 112319.pdf

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Large print schematic on page 12,
revision 05/09/2019
Page 2
Page 3-4
Page 5-6
Page 7-8
Page 9
Page 10-11
Page 12
Page 13
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Power curve
Parts list
Class A Driver
Input tuning
Output circuit
Setup and Test
Schematic
New Driver Amp, replaces the TDA2030
2
Parts List 100 Watt Linear Amplifier
MOSFET Input
1
1
4
4
1
1
1
1
1
1
1
1
1
1
1
3
4
IRFP250 MOSFET final
.0033uf WIMA 100V
1uf WIMA 100V
.1uf WIMA 100V
.001uf 100V
1N5819 Schottky diode
LM7812
IRF9540 P-ch switch
A-=Tayda Electronics
www.taydaelectronics.com
A-091
A-1546
A-4164
A-1569
A-4111
A-484
A-207
A-083
see improved switch option below.
SUP70101 P-ch switch, is a new much better DC switch. Available at Mouser Elect.
10K ohm NTC Thermistor
200 ohm 25 turn bias pot R3
1N4740 10V Zener diode
470uf 50 vdc
4700uf 50 vdc
3.3K OHM 1W Carbon
10 ohm carbon resistors
T106-2 Toroid
A-409
A-590
A-634
A-4545
A-4546
A-2717
A-2250
http://www.kitsandparts.com
MOSFET output
3
1
2
3
6.8 nf WIMA 400V
.015 uf WIMA 400V
2200 pf Mica 500V
Mouser Electronics
Mouser Electronics
Search EBay, many listed
1
2
.1 WIMA 400V
1 uf WIMA 400V
Mouser Electronics
Mouser Electronics
Class A driver
1
1
2
1
Diecast Box style 1590A
100 ohm, 25T Pot
100 ohm resistors
FT50-J Toroid
A-5163
A-584
A-2051
http://www.kitsandparts.com
1
TDA2030A Kit, Search EBay for Kit (see picture). Buy two just in case you damage one.
NOTE SEE PAGE 13-14 for a driver amplifier that can be easily built, and it’s a much better
option.
Most of the parts are inexpensive so order more than you think you will need. Anything can
and will happen while building and testing.
I recommend four of the IRFP250 MOSFET finals; one for building, one for (why did I do that),
and two for spare.
The list is not complete with all the components, but anything you need not on the list, should
be available on the Tayda site
The capacitors on the MSOFET input are not critical, (WIMA not necessary) but use good
quality. On the output use WIMA pulse capacitors at least 400V.
The 2200pf silver mica across L3 needs to be 2200pf if L3 is 13uh. Up to 2250pf is ok, so mix
and match to get the correct value if a single 2200pf is not available.
4
TDA2030A Class A Driver
The driver is used to increase level to a + 25dbm or 300mw for the input of the amplifier. If
using a rig that puts out a 0dbm, this is a good option. If your transmit power source is above a
+25dbm (300mw) you will need to pad it down.
The board on the right is the TDA2030A Kit that’s available on EBay. This is the board that I
used and it works, with better than 28db of gain. Maximum input before distortion is around
-3dbm and output is +28dbm. I mounted it in a Di-cast case with an added heatsink on the back
where the TDA2030 device is mounted. The di-cast box will get very hot without the added
heatsink. I have built four of these driver amps and they all performed to the same level.
The output transformer T1 is shown wound on a FT100-J, but the FT50-J works better. If using
the F 100-J the primary and secondary need to be wound close together to reduce coupling
loss. Not a problem when using the FT50-J.
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