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So i cannot transmit OP32 on VLF because it would be incoherent
Ah-so reverse engineering in D land ,
means going back in time , now it
makes sense ...back to basic's , like re inventing
the wheel !
PS, Modern OP32 can be sent by the average Wobbly
Bob system !
: -)
Sent: Sunday, December 29, 2013 1:43 AM
Subject: LF: VLF exciter
Am 28.12.2013 23:33, schrieb Markus Vester:
[...]
PS Any progress on bypassing the divider in your
VLF transmit chain?
Aaah, no, i forgot that. So i cannot transmit OP32 on VLF because
it would be incoherent then. So i have to key the PA via a VOX and OP32 tones,
still :-/
In this H bridge PA config, an exact 50% duty cycle isn't
needed, so i may actually remove the divider. But then i need a solid and
defined input signal wave form! How do i get an inverted signal then? A
transformer isn't possible since i like to have a wide frequency range of the
PA. So far it works from 10 Hz to > 100 kHz. With the frequency divider, the
wave form can be quite distorted, no problem unless the peak reaches the
necessary voltage level. So maybe it is better to build the VOX circuit instead?
Also i want to leave the PA circuit as it is, for nostalgic reasons :-)
Or do
you have another idea? I remember that circuit with the XOR gates...
73,
Stefan/DK7FC
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