Today's Message Index:
----------------------
1. 04:09 AM - Radio interference on pitch trim indicator (Phil B)
2. 04:32 AM - Re: Radio interference on pitch trim indicator (Bob Harrison)
3. 06:11 AM - Re: Radio interference on pitch trim indicator (Mike Gamble)
Message 1
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| Subject: | Radio interference on pitch trim indicator |
When transmitting, the pitch trim indicator display is affected and I get a crackle
in the headphones.
To try and resolve the problem I have run a temporary aerial forward through the
firewall and around the outside the fuselage about 1m offset, onto the dipole
aerial from the rear of the rudder so that it is clear of the pitch trim at
the rear of the fuselage and connected the radio to its own power source all to
no avail.
Ive read previous posts on this forum re the pitch trim interference and assume
it will not cause any problems. How can I reduce the crackle while transmitting
as it is fairly loud and cannot be reduced by altering the squelch setting?
Ive cleaned all the earth connections and can only assume the crackle is being
somehow induced via the pitch trim wiring which I have separated as far as possible
from the antenna and the wiring to the radio.
All suggestions appreciated.
Thanks,
--------
Phil B
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422721#422721
Message 2
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| Subject: | Radio interference on pitch trim indicator |
Hi! Phil,
I'm no electronics or radio guru but there is no doubt some relationship to the
radio transmit circuit since the LED trim display certainly flickers when transmitting
even though there is no duplicated connections with the two circuits
but thankfully I don't get noise.
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Phil B
Sent: 02 May 2014 12:09
Subject: Europa-List: Radio interference on pitch trim indicator
When transmitting, the pitch trim indicator display is affected and I get a crackle
in the headphones.
To try and resolve the problem I have run a temporary aerial forward through the
firewall and around the outside the fuselage about 1m offset, onto the dipole
aerial from the rear of the rudder so that it is clear of the pitch trim at
the rear of the fuselage and connected the radio to its own power source all to
no avail.
Ive read previous posts on this forum re the pitch trim interference and assume
it will not cause any problems. How can I reduce the crackle while transmitting
as it is fairly loud and cannot be reduced by altering the squelch setting?
Ive cleaned all the earth connections and can only assume the crackle is being
somehow induced via the pitch trim wiring which I have separated as far as possible
from the antenna and the wiring to the radio.
All suggestions appreciated.
Thanks,
--------
Phil B
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422721#422721
Message 3
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| Subject: | Radio interference on pitch trim indicator |
Me too - trim gauge flickers with transmit but no associated noise.
Suspect degree of interference varies with frequency selected but I'm not able
to check right now.
Mike Gamble G-CFMP
-----Original Message-----
From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Bob Harrison
Sent: 02 May 2014 12:32
Subject: RE: Europa-List: Radio interference on pitch trim indicator
--> <ptag.dev@talktalk.net>
Hi! Phil,
I'm no electronics or radio guru but there is no doubt some relationship to the
radio transmit circuit since the LED trim display certainly flickers when transmitting
even though there is no duplicated connections with the two circuits
but thankfully I don't get noise.
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Phil B
Sent: 02 May 2014 12:09
Subject: Europa-List: Radio interference on pitch trim indicator
When transmitting, the pitch trim indicator display is affected and I get a crackle
in the headphones.
To try and resolve the problem I have run a temporary aerial forward through the
firewall and around the outside the fuselage about 1m offset, onto the dipole
aerial from the rear of the rudder so that it is clear of the pitch trim at
the rear of the fuselage and connected the radio to its own power source all to
no avail.
Ive read previous posts on this forum re the pitch trim interference and assume
it will not cause any problems. How can I reduce the crackle while transmitting
as it is fairly loud and cannot be reduced by altering the squelch setting?
Ive cleaned all the earth connections and can only assume the crackle is being
somehow induced via the pitch trim wiring which I have separated as far as possible
from the antenna and the wiring to the radio.
All suggestions appreciated.
Thanks,
--------
Phil B
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422721#422721
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