LF,
There's some progress on the AM modulator stage here. Now the step down
converter works in general, i just have to optimise the PID parameters,
i.e. regulator performance. Main parts of the stage are an IRFP460A,
IR2113, TL494, IXDD414CI.
https://dl.dropbox.com/u/19882028/LF/step%20down%20converter.JPG
The inductor is using a single turn on an Epcos B64290L699X830
ferrite core with an Al of 10.8uH.
Hopefully i can soon run slow hell transmissions in the LF QRSS-60 EU
slot without generating sidebands...
73, Stefan/DK7FC
Am 21.09.2012 15:59, schrieb Johan H. Bodin:
Stefan Schäfer skrev 2012-09-21 00:04:
https://dl.dropbox.com/u/19882028/LF/SDC1.JPG
An add-on to my LF PA. Guess what it is?! :-)
Hi Stefan,
I'd guess it is the power section of a PWM AM modulator for one of your
switching QRO amplifiers?
73
Johan SM6LKM
|
|
