Makes sense, Lee
Charlie
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Lee K7TJR
Sent: Monday, August 31, 2015 12:44 AM
To: topband@contesting.com
Subject: Topband: KD9SV-OK1RR relays ??? (RX Front End Protector)
I believe the point of having
Doug
I am going to ship you the relays for free. Just let me know to address
and phone number for parcel service.
73 - Petr, OK1RP
On Mon, Aug 31, 2015, at 04:15 AM, Douglas Ruz (CO8DM) wrote:
> Martin, Tom and all members of the list,
>
> The AS RXFEP is very nice but it is very expensive.
>
On Mon,8/31/2015 4:37 AM, Larry via Topband wrote:
I have been following the discussion on front end relays with
interest, and I was wondering
what sorts of bandpass filters folks are using for receive antennas.
Bandpass filters do nothing for in-band signals -- their only function
is to
Thanks for your help Petr
73Douglas, CO8DM
"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla
- Original Message -
From: "Petr Ourednik"
Bandpass filters do nothing for in-band signals -- their only function is
to reject OUT OF BAND signals. The primary reason for using bandpass
filters IS for RX. A good 160M bandpass filter would be effective at
reducing overload from AM broadcast stations. So would a high pass filter.
There
GM All,
Can someone recomend me a simple high pass filter that will reject strong AM
signal trasmitted at 225 khz?
I've just looked at Petr OK1RR website and there is nice filter, but rejects
400khz-1600khz band, so will not work in my case...
This signal at 225 Khz comes from Polish Radio I
I have been following the discussion on front end relays with interest,
and I was wondering
what sorts of bandpass filters folks are using for receive antennas.
Right now my BOGs don't
have any.
I know of the W3NQN and similar filters; I have a set for 80-10 that I
use for Field Day.
I
FYI - The S-QSK boards are now spoken for. Thanks for the replies.
Paul, W9AC
_
Topband Reflector Archives - http://www.contesting.com/_topband
Another option for "front end" sequencing control involves the use of a
microcontroller to time R=>T and the the reverse switching events. For the
past two years, I've been using an Arduino Nano-based controller to manage
amplifier switching as well as a PIN diode T/R switch to silently
The Array Solutions device also uses the transformers to increase the
voltage at the diodes then steps it back down which means that the diodes
are not doing their limiting at 50 ohms. Therefore, your set of 2 series
diodes or even one diode each direction is limiting at a higher power
level
10 matches
Mail list logo
