2805 NW 6th Street
Gainesville, Florida 32609
|Custom & 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.
MicTel Amplified Mic/line to Telephone Interface
Studio Quality Line Level Outputs & Built-In
The 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.
The MicTel includes a line-level, balanced
input for mixing in tape players, etc.
Along 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 line.
Its audio & battery specifications will
provide long life and "Broadcast Quality"
The 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 the MicTel.
List price is just $319.00
Many of the MicTel's varied uses are graphically
depicted in the technical manual which can
be downloaded here.
Contact us or your favorite dealer for more info on this or any other CircuitWerkes
|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 remote broadcasts.
||Outputs for telephone handset, cellular phone
or balanced line level at up to +10dBm.
||Audio inputs from phone handset, cell phone
or balanced line.
||Program bus is fed by balanced mic preamp
and an auxiliary balanced line input.
||Individual gain controls for send, receive
and headphones levels.
||High quality, user-switchable, internal limiter
||Has both 1/4" and 3.5mm stereo headphone/cue
||Headphone amp has a variable level balanced
input and adjustable sidetone so you can
monitor an IFB or cue return source AND/OR
your program audio.
||Rugged design & Long life potentiometers
for extra years of trouble-free broadcasts.
||Industry standard XLR mic and program output
||External power input with silent, auto-switching
battery backup & low battery indicator
||Uses two 9V batteries or the included, CircuitWerkes
List price is just $319.00
The MicTel Compared to the Gentner* Microtel:
The new MicTel features many improvements
over the original Microtel that was first
built in the early 1980s. Some of the improvements
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 about
-1dBm, but the MicTel has a M.O.L. of about
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
*The Gentner name and trademark is the property
of ClearOne, Inc.
CircuitWerkes & the MicTel product are
not affiliated with Gentner Communications
or ClearOne, Inc.
MicTel Rear Panel
CircuitWerkes 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
- 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
- Handset RJ-9
- Cellular 2.5" mini TRS (tip = send,
ring = rcv)
- 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
- Aux I/O Out +10 dBm (50Hz - 15kHz) 600
- Handset Transmit -3 dBm Max (300Hz - 3kHz)
- Distortion Less than .1% (no limiting)
- Threshold Level = +3 to +5dBm at MicTel's
- Slope = .2dB of output per 1dB rise at
- Maximum compression = 20dB
- Maximum distortion at 10dB of limiting
= less than 1%
- Two 9Volt Alkaline batteries or 12-16Vdc
external power w/auto-switched backup
- Nominal current consumption
- 55mA at full output
- 22mA at idle current
All line level measurements made into 600
Ohm load using 9V battery power.
All measurements referenced to 1 kHz.
All measurements made using the following:
- Potomac Instruments AT-51 test set
- Tektronix 7603 scope
- Northeast Electronics Corp TTS-37B Measuring
- HP-3551a Transmission Test Set
- Digimax D-1200 frequency counter
Specifications subject to change without