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External
Since: Aug 02, 2003
Posts: 438
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(Msg. 1) Posted: Sun Apr 22, 2007 11:22 am
Post subject: RF antenna advice
Archived from groups: rec>arts>movies>production>sound (more info?)
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At this point, I have so many damned RF devices on my cart, keeping them out
of the way of each other is getting harder and harder to do. I am, as a sort
of raw friend of mine used to say, "steppin' on my own dick." Here is the
list in their priority to me behind the panel:
Lectro Venue Blk 21-22 with two omni GPU antennas mounted at either end of
my 4' long cart. Works fine.
Comtek BST-50 at 75.5mhz with a quarter-wave whip grounded to the chassis of
the cart fed with a short length of RG8. Works fine.
Sony TV tuner with a large "bat wing" antenna. Works OK.
Lectro T2 IFB transmitter, currently feeding IFB to two wireless boom-ops.
Quarter wave whip attached directly to transmitter. Works fine.
Sennheiser IEM 300 transmitter. This is the bugaboo. I'd like to use this
to feed my boom ops. It'd doesn't work too well at this time (it's probably
not the best RF device out there) with a bat-wing LPDA, but it does many
things very well in theory. The two-track input allows the boom-ops to
custom mix what they want in their phone, one boom/both booms, booms/radios,
etc. and it is frequency agile. It does effect reception on some other
devices, especially my Sony TV receiver; not sure about it's effect on the
VR. I am wondering if anyone has any experience with the PWS Helical
Antenna as a possible transmit antenna for the Sennheiser IEM 300. It is
expensive ($500) but if it solved my problem, I would consider it.
Anyone?
D. |
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External
Since: Aug 02, 2003
Posts: 438
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(Msg. 2) Posted: Sun Apr 22, 2007 11:27 am
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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BTW, if I got the Sennheiser unit working, I would turn off the Lectro T2
and save it for special uses.
D.
"Douglas Tourtelot" <tourtelot.DeleteThis@speakeasy.net> wrote in message
news:qr-dneJ6F-RCBLbbnZ2dnUVZ_hCdnZ2d@speakeasy.net...
> At this point, I have so many damned RF devices on my cart, keeping them
> out of the way of each other is getting harder and harder to do. I am, as
> a sort of raw friend of mine used to say, "steppin' on my own dick." Here
> is the list in their priority to me behind the panel:
>
> Lectro Venue Blk 21-22 with two omni GPU antennas mounted at either end of
> my 4' long cart. Works fine.
>
> Comtek BST-50 at 75.5mhz with a quarter-wave whip grounded to the chassis
> of the cart fed with a short length of RG8. Works fine.
>
> Sony TV tuner with a large "bat wing" antenna. Works OK.
>
> Lectro T2 IFB transmitter, currently feeding IFB to two wireless boom-ops.
> Quarter wave whip attached directly to transmitter. Works fine.
>
> Sennheiser IEM 300 transmitter. This is the bugaboo. I'd like to use
> this to feed my boom ops. It'd doesn't work too well at this time (it's
> probably not the best RF device out there) with a bat-wing LPDA, but it
> does many things very well in theory. The two-track input allows the
> boom-ops to custom mix what they want in their phone, one boom/both booms,
> booms/radios, etc. and it is frequency agile. It does effect reception on
> some other devices, especially my Sony TV receiver; not sure about it's
> effect on the VR. I am wondering if anyone has any experience with the
> PWS Helical Antenna as a possible transmit antenna for the Sennheiser IEM
> 300. It is expensive ($500) but if it solved my problem, I would consider
> it.
>
> Anyone?
>
> D.
> |
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External
Since: Apr 18, 2007
Posts: 130
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(Msg. 3) Posted: Sun Apr 22, 2007 12:04 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I use the Sennheiser IEM at around 520mHz feeding a Shure shark fin
mounted on top of my cart while my wireless mics are block 26, approx
675-680 mHz using the Zaxcom shark fin pair mounted on a mast that
rises up to 6' over my cart. I haven't seen any interference between
the 2 systems. I also have a Comtek BST and phase right antenna on
top of the cart to feed the masses. They all seem to play along
together. I'm not crazy about the range of the Sennheisers, but
that's probably due to the tiny flexi whip antenna permanently mounted
on the receivers.
Billy >> Stay informed about: RF antenna advice |
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External
Since: Apr 22, 2007
Posts: 5
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(Msg. 4) Posted: Sun Apr 22, 2007 6:23 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Set the TX to MONO. It seems to work beter. I have had a lot of
years use with this system. Works great. And the EW500 TX will work
for your feed back as well, when you go mobile. I alos use a
"batwing" antena.
Coleman >> Stay informed about: RF antenna advice |
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External
Since: Aug 02, 2003
Posts: 438
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(Msg. 5) Posted: Sun Apr 22, 2007 8:56 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Thanks Billy and Coleman. I am also thinking about trying the PWS Helical
antenna but it might be trying to make a silk purse out of a sow's ear. It
mostly interfered with my Sony TV tuner; didn't seem to bother the Lectr VR.
D.
Coleman Metts" <colemansmail.RemoveThis@yahoo.com> wrote in message
news:1177291416.867561.131800@b58g2000hsg.googlegroups.com...
> Set the TX to MONO. It seems to work beter. I have had a lot of
> years use with this system. Works great. And the EW500 TX will work
> for your feed back as well, when you go mobile. I alos use a
> "batwing" antena.
> Coleman
> >> Stay informed about: RF antenna advice |
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External
Since: Apr 18, 2007
Posts: 130
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(Msg. 6) Posted: Mon Apr 23, 2007 4:58 am
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I saw the helical at NAB, but for my taste it's just too large and
heavy. I'd have to add a hi-boy to my kit! What was interfering with
your TV tuner, the IEM? I've pretty much given up on wireless video
on my cart. I've been using the Cat5 system. It's a shame to be back
to using cable, but it works great and it is a pleasure having 2 high
quality video feeds once again.
All the best,
Billy
On Apr 22, 10:56 pm, "Douglas Tourtelot" <tourte....TakeThisOut@speakeasy.net>
wrote:
> Thanks Billy and Coleman. I am also thinking about trying the PWS Helical
> antenna but it might be trying to make a silk purse out of a sow's ear. It
> mostly interfered with my Sony TV tuner; didn't seem to bother the Lectr VR.
>
> D.Coleman Metts" <colemansm....TakeThisOut@yahoo.com> wrote in message
>
> news:1177291416.867561.131800@b58g2000hsg.googlegroups.com...
>
>
>
> > Set the TX to MONO. It seems to work beter. I have had a lot of
> > years use with this system. Works great. And the EW500 TX will work
> > for your feed back as well, when you go mobile. I alos use a
> > "batwing" antena.
> > Coleman- Hide quoted text -
>
> - Show quoted text - >> Stay informed about: RF antenna advice |
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External
Since: Apr 17, 2007
Posts: 13
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(Msg. 7) Posted: Mon Apr 23, 2007 6:12 am
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On occasion, I've A1'd on big corp-comm. shows using the
ProfessionalWireless.Com Helical antennas. They're totally amazing
(even better than Yagi's).
For location use though - they're very big and fairly delicate (made
of plexiglass), so I'm not so sure how practical it would be for
location use.
Jamie Scarpuzza >> Stay informed about: RF antenna advice |
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External
Since: Aug 02, 2003
Posts: 438
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(Msg. 8) Posted: Mon Apr 23, 2007 6:49 am
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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For some reason, my Cat5 video didn't work so well on this job. No matter
what I hooked up to these to Sony monitors, it affected the termination so
badly that the DP said "No." This was not just the Cat5 Balun but even my
VCA video DAs. So I gave up on it for this one and went back to tuning in
the transmitters on the cameras.
D.
"Billy Sarokin" <bigmaho RemoveThis @verizon.net> wrote in message
news:1177329519.651559.57220@n59g2000hsh.googlegroups.com...
>I saw the helical at NAB, but for my taste it's just too large and
> heavy. I'd have to add a hi-boy to my kit! What was interfering with
> your TV tuner, the IEM? I've pretty much given up on wireless video
> on my cart. I've been using the Cat5 system. It's a shame to be back
> to using cable, but it works great and it is a pleasure having 2 high
> quality video feeds once again.
> All the best,
> Billy
>
>
> On Apr 22, 10:56 pm, "Douglas Tourtelot" <tourte... RemoveThis @speakeasy.net>
> wrote:
>> Thanks Billy and Coleman. I am also thinking about trying the PWS
>> Helical
>> antenna but it might be trying to make a silk purse out of a sow's ear.
>> It
>> mostly interfered with my Sony TV tuner; didn't seem to bother the Lectr
>> VR.
>>
>> D.Coleman Metts" <colemansm... RemoveThis @yahoo.com> wrote in message
>>
>> news:1177291416.867561.131800@b58g2000hsg.googlegroups.com...
>>
>>
>>
>> > Set the TX to MONO. It seems to work beter. I have had a lot of
>> > years use with this system. Works great. And the EW500 TX will work
>> > for your feed back as well, when you go mobile. I alos use a
>> > "batwing" antena.
>> > Coleman- Hide quoted text -
>>
>> - Show quoted text -
>
> >> Stay informed about: RF antenna advice |
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External
Since: Apr 22, 2007
Posts: 5
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(Msg. 9) Posted: Mon Apr 23, 2007 8:41 am
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"For some reason, my Cat5 video didn't work so well on this job. No
matter
what I hooked up to these to Sony monitors, it affected the
termination so
badly that the DP said "No."
It's because these morons do not have a Video Distribution Amplifier .
BEFORE the signal goes into the monitor, and then to you. Nice that
we have to supply the video equipment now, for no more money....
Coleman >> Stay informed about: RF antenna advice |
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Since: Oct 31, 2006
Posts: 32
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(Msg. 10) Posted: Mon Apr 23, 2007 11:25 am
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I had this happen a couple of months ago with two Sony 730's I recall.
Anything I hooked up to the client/DP monitor (loop through, "T", even
sending the camera though a DA) would effect termination or something.
I tried everything, but had to stop because they were really getting
annoyed with me constantly screwing with the monitors...
I couldn't make sense with it, but pretty much came to the conclusion
that something was messed up with the DP's monitor.
Eric
Douglas Tourtelot wrote:
> For some reason, my Cat5 video didn't work so well on this job. No matter
> what I hooked up to these to Sony monitors, it affected the termination so
> badly that the DP said "No." This was not just the Cat5 Balun but even my
> VCA video DAs. So I gave up on it for this one and went back to tuning in
> the transmitters on the cameras.
>
> D. >> Stay informed about: RF antenna advice |
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Since: Aug 02, 2003
Posts: 438
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(Msg. 11) Posted: Mon Apr 23, 2007 6:59 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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What you say is true. I have a whole case of video stuff, and the camera PA
does Video Assist (no recording makes it all right with the Local!!) and
she's sweet and stuff, but. . . .
However, the termination issue happens even through (my supplied) video DAs.
Could figure it out and gave up.
D.
"Coleman Metts" <colemansmail.TakeThisOut@yahoo.com> wrote in message
news:1177342892.307327.285490@q75g2000hsh.googlegroups.com...
>
> "For some reason, my Cat5 video didn't work so well on this job. No
> matter
> what I hooked up to these to Sony monitors, it affected the
> termination so
> badly that the DP said "No."
>
> It's because these morons do not have a Video Distribution Amplifier .
> BEFORE the signal goes into the monitor, and then to you. Nice that
> we have to supply the video equipment now, for no more money....
> Coleman
> >> Stay informed about: RF antenna advice |
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Since: Aug 02, 2003
Posts: 438
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(Msg. 12) Posted: Mon Apr 23, 2007 6:59 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I'll check the model number of these units and report back. Could just be
something weird with this model.
D.
"Eric Pierce" <thefirstname.TakeThisOut@ericsound.com> wrote in message
news:CS6Xh.205$os3.42@newsfe12.lga...
>I had this happen a couple of months ago with two Sony 730's I recall.
>Anything I hooked up to the client/DP monitor (loop through, "T", even
>sending the camera though a DA) would effect termination or something. I
>tried everything, but had to stop because they were really getting annoyed
>with me constantly screwing with the monitors...
>
> I couldn't make sense with it, but pretty much came to the conclusion that
> something was messed up with the DP's monitor.
>
> Eric
>
>
>
> Douglas Tourtelot wrote:
>> For some reason, my Cat5 video didn't work so well on this job. No
>> matter what I hooked up to these to Sony monitors, it affected the
>> termination so badly that the DP said "No." This was not just the Cat5
>> Balun but even my VCA video DAs. So I gave up on it for this one and
>> went back to tuning in the transmitters on the cameras.
>>
>> D. >> Stay informed about: RF antenna advice |
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Since: Apr 16, 2007
Posts: 51
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(Msg. 13) Posted: Mon Apr 23, 2007 7:23 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Apr 23, 8:49 am, "Douglas Tourtelot" <tourte....TakeThisOut@speakeasy.net>
wrote:
> For some reason, my Cat5 video didn't work so well on this job. No matter
> what I hooked up to these to Sony monitors, it affected the termination so
> badly that the DP said "No."
Doug, I hate to suggest what is probably tried and obvious, but are
you sure whatever AC power was being fed to your cart was on the
*EXACT* *SAME* circuit as video's was? Not just the same genny, but
the same exact lunchbox or quad? I've had hassles with those Sonys
too, but attention to this, sometimes coupled with the use of good DAs
before going to *any* monitor, has often quelled the Sony beast. On
my current show we couldn't get rid of video issues until we plugged
directly into video's cube tap, even though it seemed logical that it
should work plugged into a nearby source.
If you don't have good DAs, use a BNC "T" and go in at the input stage
rather than the output stage. Don't use the Sony "OUT" BNC
connector! It's not perfect, but it's better than adding more layers
of RF to your sandwich.
Regards,
Noah Timan >> Stay informed about: RF antenna advice |
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Since: Dec 18, 2004
Posts: 38
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(Msg. 14) Posted: Sun Apr 29, 2007 3:48 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Let me add some thoughts here as I mainly do VA jobs these days. I had
a few days of pain with termination problems which I finally solved
with a DA (supplied by me :). A badly designed (cheap) DA will no tbe
a solution for a termination problem. Simpler DAs have only one Op-
Amp, and it gains up enough that the output can be simply connected to
several outputs. Overload is solved with a manual gain pot, so you
gain down when you only use one or two outs. If the output is not auto
terminated, or your termination is bad, you will have problems. Also,
most termination problems are caused not by the end device having
wrong impedance, but a broken or wrongly choosen cable. Check if your
baluns keep up with the 75 ohm standard. Maybe put a 75 ohm isolation
transformer in the line. This will show a correct impedance to the
monitor, and also solve any problems caused when you are on a
different mains line. At least thats what I would try.
Cheers
Balazs >> Stay informed about: RF antenna advice |
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Since: Apr 25, 2007
Posts: 44
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(Msg. 15) Posted: Sun Apr 29, 2007 6:23 pm
Post subject: Re: RF antenna advice [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Apr 23, 5:59 pm, "Douglas Tourtelot" <tourte....RemoveThis@speakeasy.net>
wrote:
> What you say is true. I have a whole case of video stuff, and the camera PA
> does Video Assist (no recording makes it all right with the Local!!) and
> she's sweet and stuff, but. . . .
>
Video assist without record used to fall on the camera local. The
camera assistants would hate when there was not a video person,
because they would be responsible to move the monitors around. Funny
how a department with three members per camera plus a loader can't
move one video cart, but one video person is expected to have monitors
all over the place and record and play back all while moving their
gear, and re-hooking the camera when it is moved two feet (God forbid
on of the AC's or the dolly grip can't plug it back in).
But the camera department adopted the "Camera PA" or even worse the
unpaid "Camera Intern" position, and gave this untrained person the
responsibility of performing a job requiring at least a bit of skill.
This "new" position gave producers another option to not hiring a
union video person to handle the job.
It's a shame that it's "all right with the Local", as this person
quite often will record playback or "screen" DVD dailies, which also
used to be a Local 695 position. >> Stay informed about: RF antenna advice |
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