dj9dw schrieb:
Hello group,
as I can't get in contact with David, G0MRF, I want to spread out my problem
here.
The TX works fine except the outputtransformer T2. There is heavy ringing at
abt 1 MHz. Now I figured, the inductance seems to be abt 300uH from drain to
drain. That shure is far too much.
Could it be that David has changed the toroid - type to one with higher u so
that 10 turns primary has to be reduced?
Your help is very welcom, I am stuck.
Regards, dj9dw, Peter.
Hi Peter,
pse see
http://www.qsl.net/dj8wx/My%20second%20transmitter.htm
if T2 is not pressed p.e. between two ceramic pieces
it should be coold by a fan or else it vibrates on subharmonics of the
transmitted QRG.
btw. how did you find out a "ringing" at abt 1MHz ?
best regards
Uwe/dj8wx
|
