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  Identification of a
Motorola Quantar Station



Where To Begin:

The quickest, most non-invasive method of identifying the basic band of a Quantar station
is to look at the receiver module on the right side of the card cage. A 700/800/900 MHz
station will have no holes. A UHF station will have 5 holes, but only three will have tuning
slugs visible. A VHF station will have five holes, with 5 tuning slugs visible.

If the station is in the desired band, the next step is to look at the rear of the unit and read
the part number label on the power amplifier module. It is usually visible without removing
the module.

There are two different numbers you may encounter - the OEM (Original Equipment Manufacturer)
modules used during assembly at the factory and if any modules have been replaced, FRU
(Field Replaceable Units). If this is the case, you will see different part numbers, typically
with "LN" in the second and third position.

The FRU and OEM units are the same components - one is a repair part, the other is a
factory-installed module.

All VHF Range 2 (150-174 MHz) equipment will tune and operate down to approximately 146 MHz.

Power Amplifier Modules:

TLD3110TLN3255 25w132-174 R1/R2
TLD3101TLN3379 125w132-154 R1
TLD3102TLN3254 125w150-174 R2
TTE2062TLN3446 110w440-470 R2

If the number on the PA (power amplifier) is highlighted in red, the next step is to
remove the exciter to verify that it has the correct part number for the station.
However, on the exciter and receiver modules, the manual references a third part
number (CLx) in the "Factory Option Matrix". At least one of these, CLD1260
crosses to the TLN3251 in MOL. However most do not cross in MOL.

Any of the three part number formats could possibly be found on a Quantar exciter
module. Most importantly, they all refer to the same component.

Exciter Modules:

TLD9831TLN3252 CLD1270132-154 R1
TLD9832TLN3253 CLD1280150-174 R2
TLE5972TLN3306 CLE1240440-470 R2

Receiver Modules:

Each receiver module is made up of the receiver itself and the preselector.
The same part number identification system as the exciter modules applies.

TRD6361TLN3250 CLD1250TFD6511 132-154R1
TRE6282TLN3314 CLE1200TLE5992 440-470R2

Module Removal:

CAUTION: Make sure both the AC and DC (if so equipped) power is
disconnected from the station before removing or inserting any modules.
An ESD strap is recommended as well.

Each module is held in place in the card cage with two T15 Metric Torx screws.
On the 100-watt stations, a short coaxial jumper feeds the power amplifier module
from the exciter in the adjacent position in the card cage. This needs to be removed
prior to removing the exciter or power amplifier. All modules unplug from the backplane
as you slide them forward.

Quantar Bonus Items:

The Quantar station may be equipped with several items that make it more attractive
for amateur use:

  • The CPN1042A power supplies manufactured by Onan have a track record
    of the filter capacitors failing catastrophically. The CPN1042A power supply
    has vent holes covering about 80% of the front panel. The current production
    CPN1048A power supply has vent holes over 40% of the front panel and the
    cooling fan is visible from the front of the card cage.
  • X873AA ultra high stability oscillator (UHSO). It is always positioned between
    the control module and receiver module. If the station does not have the high
    stability option, there will be a blank module in the card cage.
  • Battery Revert - if the station has battery revert, the DC cord is usually fitted.
    If the cord is not in place, there will be a card edge connector visible at connector
    25 on the rear panel. No connector means no battery revert option. Note: there
    may be a blank cover (P/N 1582596Y01) over connector 25.
  • 4 wire vs. 8 wire control.

Reference Material:

  • Quantar instruction manual (6881095E05-O)
  • Quantar Radio Service Software User's Guide (6881096E10)
  • Standards and Guidelines for Communications Sites (6881089E50)

Handy Part Numbers for Accessories:

  • Quantar DC Power Cable (TRN5155A)
  • Quantar center mount brackets (TTN5028A)
  • Quantar local Microphone (HMN1001)
  • Quantar local Speaker (HSN1000)
  • Quantar RSS (RVN5002)
  • Quantar Programming Cable (3080369E31)

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in these modifications and conversions is © Copyrighted
2013 and (date of last update/edit) by
W4CLL and multiple originating authors.