Today's Message Index:
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1. 05:05 AM - BK 170B transmit prob. (Dustin Paulson)
2. 05:23 AM - Re: BK 170B transmit prob. (Beckman, Rick)
3. 06:00 AM - Re: BK 170B transmit prob. ()
4. 06:26 AM - Re: BK 170B transmit prob. (Noel Loveys)
Message 1
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Subject: | BK 170B transmit prob. |
As I was preparing to take off for a BFR check ride last night, my CFI
said "don't do what the guy who just took off in front of you did by not
announcing your intentions".
Later "that guy" stopped by my hangar, and I asked why he didn't use his
radio. He said he had, and he heard me fine when I was transmitting, and
was able to hear himself over his headphones when he used PTT button to
make his announcements.
Any ideas out there on where to start diagnosing what may have caused
his ability to receive transmissions, but not to send them on his BK
170B.
Thanks
Dustin Paulson
Message 2
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Subject: | BK 170B transmit prob. |
Sounds like a broken mic wire, possibly.
R
Do NOT archive
As I was preparing to take off for a BFR check ride last night, my CFI
said "don't do what the guy who just took off in front of you did by not
announcing your intentions".
Later "that guy" stopped by my hangar, and I asked why he didn't use his
radio. He said he had, and he heard me fine when I was transmitting, and
was able to hear himself over his headphones when he used PTT button to
make his announcements.
Any ideas out there on where to start diagnosing what may have caused
his ability to receive transmissions, but not to send them on his BK
170B.
Thanks
Dustin Paulson
Message 3
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Subject: | BK 170B transmit prob. |
First off it's always a good idea to call out a radio check b4 you leave
your parking spot. This kind of thing happens all the time and is easily
avoidable. Just because your radio worked yesterday that is no guarantee
of today's quality.
Yes, every radio has two modes, RX and TX. The 170's are good radios but
have been around since the bygone years. When was the last time it was
bench tested? Does it have the updated digital interface? A few dollars
at the radio shop would be a good investment.
Since he is receiving voice, it's a safe assumption the antenna is
working but don't overlook the condition of the connections. Yes, the
mic may be another; even the wires coming out of the audio panel
connected to the mic jacks may be suspect. If he has an ohm meter, I
would check every wire for continuity and if that passes muster, take
the radio to the shop. Better yet, upgrade to a more reliable solid
state, low power unit.
-----Original Message-----
From: owner-avionics-list-server@matronics.com
[mailto:owner-avionics-list-server@matronics.com] On Behalf Of Beckman,
Rick
Sent: Friday, May 23, 2008 8:20 AM
To: avionics-list@matronics.com
Subject: RE: Avionics-List: BK 170B transmit prob.
Sounds like a broken mic wire, possibly.
R
Do NOT archive
As I was preparing to take off for a BFR check ride last night,
my CFI said "don't do what the guy who just took off in front of you did
by not announcing your intentions".
Later "that guy" stopped by my hangar, and I asked why he didn't
use his radio. He said he had, and he heard me fine when I was
transmitting, and was able to hear himself over his headphones when he
used PTT button to make his announcements.
Any ideas out there on where to start diagnosing what may have
caused his ability to receive transmissions, but not to send them on his
BK 170B.
Thanks
Dustin Paulson
Message 4
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Subject: | BK 170B transmit prob. |
Rick mentioned a broken mic wire... If that were the case he would not have
had side tone. Same thing true for the PTT switch.
I'd start checking from the antenna back. Try another transmitter on the
antenna feed line. If you can beg, borrow, buy or steal a bird wattmeter
you are in business. You should see power as soon as the mic is keyed. If
you don't you will have to pull the radio. Good thing is if the problem is
in the antenna feed line then you will probably get off with just replacing
the feed line. Don't forget to put in the drip loops.
If the radio is original I expect it has output tubes and the possibility of
a blown tube is pretty good. Once the heater element burns open the tube
won't work at all. A good avionics shop should have it fixed in a couple of
hours... Those rigs are built to be worked on.
Noel
From: owner-avionics-list-server@matronics.com
[mailto:owner-avionics-list-server@matronics.com] On Behalf Of Dustin
Paulson
Sent: Friday, May 23, 2008 9:32 AM
Subject: Avionics-List: BK 170B transmit prob.
As I was preparing to take off for a BFR check ride last night, my CFI said
"don't do what the guy who just took off in front of you did by not
announcing your intentions".
Later "that guy" stopped by my hangar, and I asked why he didn't use his
radio. He said he had, and he heard me fine when I was transmitting, and was
able to hear himself over his headphones when he used PTT button to make his
announcements.
Any ideas out there on where to start diagnosing what may have caused his
ability to receive transmissions, but not to send them on his BK 170B.
Thanks
Dustin Paulson
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