Joe ,
Band looks a bit funny at the moment , may there is a break in that
co-ax , that was laid to SV8 ?
630 will be useful to get a plot of the path / time .....
ok on the logic , last time I worked on discrete logic , it had 2
power rails , one + , the other - , that was needed to off set
the base-emitter voltage , a 8 bit register was on a card 6 x 4
inch , i think with 30 volt rails
Racal used TTL gates to route signals** round in the 1771 . looked odd
at first , but worked
** none signal path
73-G,
--------------------------------------------------
From: <[email protected]>
Sent: Thursday, October 23, 2014 2:26 PM
To: <[email protected]>
Subject: RE: LF: 136k VO1NA de SWL-G3XDV (England)
Thanks to GW0EZY, G0KTN, G3XDV and G0NBD for their reports/relays/advice.
The new exciter seems to be working. Trying to key the carrier
using a home brew '&' gate made with 2 NPN's and 3 4k7 resistors
was not gratifying: it toggled between half and full on!
A 4011 NAND gate was used instead for last night's test.
I am grateful to DF6NM and DK7FC for their OPDS grabbers which
both showed that my QRG is low by 0.001 Hz from what was intended.
The TX will be off tonight and tomorrow. Hopefully some 630m OP
will be radiated in the near future.
73
Joe
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