Hi Brian and also welcome :-)
I would combinate back to back diodes with a isolating transformer for audio. A
combination of the hints you heared before ;-) The transformer prevents
galvanic coupling (could become a problem even if your wire is grounded for
high voltages by the diodes) and the diodes on the soundcard side are an
additional safety factor that reduces voltage spikes. But the diodes start to
conduct already at some 1/10 volts (depending on the temperature) so you may
use 2 in series each...
73 es gl becoming QRV!!
Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von James Cowburn
Gesendet: So 13.06.2010 20:09
An: [email protected]
Betreff: LF: RE: Static protection when using a soundcard as an Rx
Hi Brian
Welcome to the reflector. Back to back diodes are good option to limit surges
and spikes, but others are more qualified than me to advise
With best regards
Jim
Dr. James Cowburn G7NKS
E [email protected]
The information transmitted is intended only for the person to whom it is
addressed and may contain confidential and/or privileged material. If you are
not the intended recipient, you are hereby notified that you must not read this
message.
Any review, retransmission, dissemination or other use of, or taking of any
action in reliance upon, this information by persons or entities other than the
intended recipient is prohibited. Consequently, this email is not intended to
be contractually binding.
If you received this in error, please contact the sender, return the message as
well as its attachments and delete the whole from any computer.
________________________________
From: [email protected]
[mailto:[email protected]] On Behalf Of Brian Reay
Sent: 13 June 2010 17:38
To: [email protected]
Subject: LF: Static protection when using a soundcard as an Rx
Hi All,
My first post to the reflector.
I plan to try using a sound card and a "long wire" (well as long as I can fit
into the garden) antenna and later a kit lofted antenna but I'm concerned re
static.
Normally I'd add a "dc short" with an inductor but at 10kHz than is a big
inductor. A resistor is another options.
Does anyone have any other suggestions, please.
73
Brian
<<winmail.dat>>
|
