Riedel, RTS and Clear-Com Intercom adapters
and application notes
Telex
BTR Aux in and Gain Modifications
-
These are Telex official modifications to the BTR wireless
intercom base stations. They rewire the AUX in such
that it does NOT back feed the hardwire interface and can be
selected to either just B channel or A+B channel.
EVERY BTR OWNER SHOULD DO THESE MODS. This makes the
aux in usable to send program just to the wired beltpacks.
Additionally there is a
+6 dB mod for the intercom out which partially corrects the
defect in the design as tested on this website
HERE.
UPS failure alarms for remote nodes
-
Nodes and panels for Riedel
systems often are far from your control area. This
method provides Monitoring of the UPS power.
In Beijing we had over 28 remote UPS systems.
Another way to setup
TRUE sidetone on Riedel Panels -The new sidetone function is
terrific. However there
are situations where it doesn't quite work and this method
is a manual sidetone program method I used in the days
before the latest command was around.
Setting levels -
Intercom with disparate types of equipment need careful
level adjustments. Here is a routine to do it.
Hybrid
Theory- Here
is a drawing explaining how a
HYBRID circuit turns 2 wire intercom (one circuit with audio
both coming and going) into 4-wire audio (two audio
circuits one coming and one going).
Audio only
adapter - Strips off the DC voltage from your
intercom system WET
lines and transformer balances the audio for recording or audio
insertion.
This adapter is NOT what you need to connect to a fiber
system. See the HYBRID explanation above.
Jib Kit
adapter - remotes the standard camera intercom to the
rear of a jib and
provides grip and Assistant Camera operators comm as well
with paralleled beltpacks.
Wireless intercom ground ISO adapter- works like an IL19
does for Audio but for dual
channel WET RTS intercom (or Clear-com) with audio only outputs
Wireless intercom basic ground isolatorTransformer
isolation for BTR BuzzBuster using Best Audio PC board.
Can also be adapted as a dual channel audio-only board by
cutting a trace.
Transformer
impedance test for intercom --
Transformers which bridge intercom lines should have a
relatively high impedance at low frequencies to avoid
destroying the transmission line characteristics of wet
intercom. Shorting the low end makes nulling hybrids
on the line harder. This test found a good and
inexpensive transformer.
Dual
Complementary Talk Only Conference
A terrific way
to cut down on the chatter on the camera channel and
eliminate the massive 4-wire programming normally used.
Telex BTR800
2-wire level test
-
This is a lab test using sine
wave and pink noise to prove that the Telex BTR800/825 2
wire interface does not provide enough return level to the
hard wire comm. FYI: The BTR system which was tested
had the most current level increase mods as recommended by
Telex.
Telex BTR Wireless Talk Around adapter to
2-wire- Sort of.
Using a 2-4 wire converter like a SSA324 from
Telex or a CCI-22 from Clear-com, this adapter creates a wet version of
the
WTA private talk between 2 BTR systems. It's limitation is that
only
the second BTR has full connection to the WTA.
