2805 NW 6th Street
Gainesville, Florida 32609
& Private Label Projects
CircuitWerkes designs and fabricates both custom and
private label electronics as well as modified versions
of our regular designs.
Click here to learn more.
Mic/line to Telephone Interface with
Studio Quality Line Level Outputs &
MicTel replaces the handset of
the telephone to provide
high-quality audio for feeding
and receiving information.
For non-telephone work, its
balanced, studio quality inputs
and outputs make it an excellent
audio interface device for all
kinds of remote or in-studio
work. The aux. audio channel
drives the headphones giving you
a portable field amplifier with
an IFB feed for your headphones
in one compact box.
MicTel includes a line-level,
balanced input for mixing in
tape players, etc.
with high quality audio, the
MicTel features audio limiters in
both the send and receive channel.
These limiters are user-defeatable
and begin working at about +3dBm
of output. The limiter works by
automatically reducing the gain of
the device during high-output,
peak audio thereby preventing
clipping, output distortion or
overdriving the telephone
Its audio & battery
specifications will provide long
life and "Broadcast Quality" audio
MicTel is a great addition to
your remote setup. Whether
you're doing news / sports
actualities, general remote
broadcasting, or you just need a
great little mini-audio work
station for your studio, you'll
appreciate the versatile
features & performance of
of the MicTel's varied uses are
graphically depicted in the
technical manual which can be
Contact us or
your favorite dealer for
more info on this or any other
| The MicTel combines a
high quality single channel Mic
amp with a headphone amp and
telephone interface in a compact
package that's ideal for locker
room reports and other extended
for telephone handset,
cellular phone or balanced
line level at up to
inputs from phone
handset, cell phone or
bus is fed by balanced mic
preamp and an auxiliary
balanced line input.
Individual gain controls
for send, receive and
internal limiter prevents
both 1/4" and 3.5mm stereo
amp has a variable level
balanced input and
adjustable sidetone so you
can monitor an IFB or cue
return source AND/OR your
design & Long life
potentiometers for extra
years of trouble-free
standard XLR mic and
program output connectors.
power input with silent,
backup & low battery
two 9V batteries or the
Compared to the Gentner*
The new MicTel features many improvements
over the original Microtel that was first
built in the early 1980s. Some of the
The original Microtel had unbalanced
inputs but the MicTel is active, balanced
for both inputs and outputs.
The MicTel’s battery life is about 20 to
30+ hours compared to about 12 hours for
The Microtel’s maximum output level was
-1dBm, but the MicTel has a M.O.L. of
The MicTel has defeatable safety limiters
to prevent line overload which the
Microtel did not offer.
The MicTel headphone output is driven from
its own volume control which is different
than the aux. (receive) control. The
Microtel’s headphone volume was only
controlled by the aux. gain control.
The MicTel has a side tone adjustment for
increasing the amount of send audio that
you can hear in your headset. The sidetone
can be applied to the headset only or to
the entire aux audio chain making the
studio mic sound more natural during
interviews. The sidetone audio can be
completely defeated when the MicTel is
being used for translation services, etc.
Gentner name and trademark is the property
of ClearOne, Inc.
CircuitWerkes & the MicTel product are
not affiliated with Gentner Communications
or ClearOne, Inc.
MicTel Typical Specs
Physical Dimensions: 6" L x 2-1/8" H x 5-1/16" W
- Weight: approx. 1.5 lbs without batteries.
- Power Supply Requirements: 12-16VDC or AC @
200mA minimum. Polarity insensitive
- Two (2) 9V Alkaline Batteries, Battery life
nominally 20-35 hours, depending on usage.
- Indicators: LED Low Battery Warning. Gives 15
to 45 minute battery life warning.
- Microphone XLR - F (Balanced Input)
- PGM/Mic Out XLR - M (Balanced Line level)
- PGM In ¼' TRS (Balanced Line level)
- Headset ¼" and 1/8" Unbalanced
- Aux I/O In & Out ¼" TRS (Balanced Line
- Handset RJ-9
- Cellular 2.5" mini TRS (tip = send, ring =
- Power jack One standard 5.5mm barrel with
- Audio Amplifier:
- Input Level Impedance
- Mic -60dBm >300 Ohms balanced
- PGM -10 dBm >10k Ohms balanced
- Aux I/O In -10 dBm >10k Ohms balanced
- Output Level Impedance
- Headset +4 dBm 8 Ohms min
- Mic/PGM Out +10 dBm (50Hz - 14kHz) 600 Ohms
- Aux I/O Out +10 dBm (50Hz - 15kHz) 600 Ohms
- Handset Transmit -3 dBm Max (300Hz - 3kHz) 600
- Distortion Less than .1% (no limiting)
- Threshold Level = +3 to +5dBm at MicTel's
- Slope = .2dB of output per 1dB rise at input
- Maximum compression = 20dB
- Maximum distortion at 10dB of limiting = less
- Two 9Volt Alkaline batteries or 12-16Vdc
external power w/auto-switched backup
- Nominal current consumption
- 55mA at full output
- 22mA at idle current
line level measurements made into 600 Ohm load
using 9V battery power.
All measurements referenced to 1 kHz.
All measurements made using the following:
Instruments AT-51 test set
Electronics Corp TTS-37B Measuring Set
Transmission Test Set
D-1200 frequency counter
subject to change without notice.