I have tested a TDA2030 for a 500KHz driver & is OK for 136KHz as other
authors have stated.
It does fall off very rapidly from 200KHz & higher & is of no use at
Gary - G4WGT.
From: [email protected]
[mailto:[email protected]] On Behalf Of Hugh_m0wye
Sent: 25 March 2009 15:01
To: [email protected]
Subject: LF: Re: TDA2003, TDA2030 for PA?
I successfully made a TDA2030 amplifier which i used for all my intial
experimenting on 137kHz
The data sheet for this IC claims a bandwidth of 140kHz so it won't work
I think I got about 6Watts out. Not all the audio ICs have as much
You need a matching circuit on the output to convert the low impedance of
the amp to 50 ohms - or whatever your antenna system uses.
----- Original Message -----
From: "Petr Malý" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 25, 2009 1:38 PM
Subject: LF: TDA2003, TDA2030 for PA?
My intention is to build a small transmitter up to some 10W for 136 and
kHz, this time not the D class, but B or AB class.
I think of employing AF amplifiers such as TDA2003, TDA2030, or similar.
course, mainly 505 kHz is rather out of range so that nothing is
This is why I ask before experimenting.
Did anybody try to use these for 136/505 kHz?
Tks, 73, Petr, OK!FIG