Uniden BC246T

Contents

Section	Topic
1	About this volume
2	Hardware tour
3	Operating modes
4	Programming workflow
5	Codeplug backups
6	Field use
7	Tips and tricks
8	Resources

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1. About this volume

The Uniden BC246T is the legacy handheld trunking scanner in the lineup — a circa-2005 Trunk Tracker III handheld that earned its keep monitoring analog Motorola Type II / EDACS / LTR trunked systems for the better part of a decade and now lives in the bench drawer as an archival/sentimental keepsake. It is honestly not a first-pick for monitoring in 2026. The radios that superseded it — the BCD396XT (Vol 13) for digital trunking and the SDS100 (Vol 10) for everything — get the active use; the 246T comes out when the question is “what does this analog Motorola Type II county sheriff system actually sound like in the wild” or when nostalgia outranks coverage.

The honest framing is important. The 246T predates P25 in this product class. There is no digital decode — no P25 Phase I, no P25 Phase II, no DMR, no NXDN, no DStar, no Tetra. The trunking decoder handles only the analog Motorola families (Type II, Type IIi Hybrid, Motorola fleet/subfleet maps), EDACS Wide/Narrow (the 9600 baud Ericsson/M/A-COM control channel format that ran on the old EDACS systems in the late 1990s and 2000s), and LTR (the older Logic Trunked Radio format that lingered on small commercial systems). Voice on the trunked talkgroups is FM, full-stop. If your county has moved to a Phase II P25 simulcast — and most have, somewhere between 2010 and 2020 — the 246T sees the control channel as noise and the voice channels as silent carriers it can’t unmute.

Where it earns the bench slot today:

• Analog Motorola Type II survivors. A handful of rural county sheriffs, fire departments, public-works fleets, NASCAR pit-row teams, and small business trunked-radio systems are still on analog Motorola Type II in 2026, mostly because the upgrade cost to P25 hasn’t been justified. The 246T tracks these correctly.
• Historical reference. It’s the radio that taught a generation of scanner listeners what “trunk tracking” meant. The control-channel-following architecture is the same conceptually as a modern P25 trunking scanner — the 246T is just stuck at the analog edge of that evolution.
• A second-or-third backup that runs forever on AA cells. Two AA NiMH or alkaline cells give it 6-8 hours of scan time. The flagships need proprietary Li-ion packs that age out; the 246T runs on whatever’s in the kitchen drawer.

Jeff bought this radio when it was current. It is kept partly because it still works correctly within its band of competence, partly because the analog Motorola Type II decoder is genuinely good, and partly because throwing away a radio that you bought new and that still functions feels wrong. It is not the radio that goes in the go-bag in 2026; it is the radio that sits on the shelf and gets pulled out twice a year.

2. Hardware tour

The 246T is a small handheld, roughly the size of a 1990s analog cell phone:

• Form factor: ~115 × 65 × 33 mm, ~200 g with batteries. Belt clip on the back.
• Display: monochrome LCD, ~64 × 128 pixels, with a green backlight on a press-button timeout. Five lines of text in scanning mode (system, group, channel tag, frequency, signal strength).
• Battery: 2× AA cell. Either NiMH (the right call for daily use — modern Eneloop 2000-2500 mAh give 6-8 hours of scanning) or alkaline (fine for emergency use, dies fast under scanning load). Charges NiMH internally via the DC input when the appropriate menu setting is enabled. No proprietary battery pack.
• Antenna jack: BNC. Stock antenna is a short rubber duck that’s mediocre on every band. BNC means an enormous aftermarket of dual-band whips, mag-mounts, and outdoor verticals attaches with a $3 BNC-to-SMA or BNC-to-N adapter.
• Programming jack: mini-USB (on later production runs) or 1/8” stereo jack with a Uniden-proprietary pinout requiring a USB-to-serial cable (earlier production). The radio in the bench drawer is the mini-USB variant.
• Audio: internal speaker on the back; 1/8” jack on the side for an earpiece or external speaker. The internal speaker is loud enough for a quiet room and inadequate in a moving car.
• Controls: rotary knob (volume + push for power), squelch knob, four-way navigation pad, ten-key numeric pad, menu/function/scan/hold/manual buttons. Direct frequency entry works the way it does on every Uniden scanner of this era — type the frequency, hit ENT, the radio jumps.
• Frequency coverage: 25-512 MHz, 806-956 MHz (cellular blocked per US Part 15.121), with gaps. No 700 MHz public-safety coverage (the 763-775 / 793-805 MHz public-safety allocation came after this radio’s design freeze and is not in the band plan). No 1.2 GHz coverage either.
• Capacity: 2500 conventional channels organized into systems/groups, plus trunking system/talkgroup lists. The organization model is the older Uniden “dynamic memory” architecture — channels live inside named systems and groups, not in flat 100-channel banks like the BC350A.

The build quality is fine for a 2005 consumer scanner. The case plastic is hard ABS, the rotary controls have not gotten scratchy with age, the LCD has not bled or developed dead pixels. The mini-USB jack is the weakest mechanical point on the design — if you program it frequently, the jack eventually loosens. Replacement jacks are a 15-minute solder job on the main board if it ever comes to that.

3. Operating modes

The 246T does two things: conventional scanning and analog trunking. Each is competent at its narrow scope.

Conventional FM/AM scan. Up to 2500 conventional channels across the supported bands. AM is supported on the aircraft band (108-137 MHz) and the CB band (26-28 MHz); everything else is narrow-FM or wide-FM. Conventional scan rate is in the 80-100 channels/second range — noticeably faster than the digital scanners because there’s no decoder math in the loop. CTCSS and DCS subaudible tone decode are supported per-channel for tone-coded squelch.

Trunking modes. Three families:

• Motorola Type II (including Type II Smartzone, fleet/subfleet maps): 5/3.6 kbps control channel in the 800/900 MHz band, also in the 851-869 MHz Motorola “high-band” UHF allocation. The 246T tracks the control channel correctly, decodes the talkgroup-to-frequency mappings in real time, and switches to the voice channel as transmissions key up. Talkgroup IDs are presented in decimal (4-digit) by default; the older fleet/subfleet hexadecimal format is supported via a menu setting for the very oldest Type I/II hybrid systems.
• Motorola Type IIi Hybrid — the transitional format that ran some agencies on both Type I and Type II talkgroup formats simultaneously. The 246T handles this; it’s a checkbox in the system setup.
• EDACS Wide/Narrow — 9600 baud Ericsson control channel, used by the M/A-COM ProVoice and EDACS systems that were widespread in the 1990s-2000s for state-level public safety. EDACS Wide is the standard channel spacing; EDACS Narrow is the 12.5 kHz variant. EDACS ProVoice itself (the digital voice mode that ran on top of EDACS infrastructure) is not decoded — the 246T sees ProVoice channels as silent carriers. Most EDACS systems are gone by 2026, retired in the great public-safety P25 migration of the 2010s.
• LTR (Logic Trunked Radio) — the older Standard LTR system used by small business and SMR trunked-radio operators. Decoded correctly. Increasingly rare in 2026.

What is not supported: P25 (any phase), DMR (any tier), NXDN, DStar, Tetra, Mototrbo (Capacity Plus / Connect Plus / Capacity Max), Phase II TDMA (the modern P25 split-slot architecture that most current public-safety systems run), OpenSky (M/A-COM’s TDMA digital that ran in NJ/PA/FL). Anything that requires more than analog FM voice on the audio path is outside this radio’s scope.

The trunking decoder is, however, very good at what it does. The 246T tracks Motorola Type II control channels reliably even at marginal signal-to-noise ratios where a newer scanner with a busier DSP front end will occasionally lose lock. The simpler signal-processing chain is an asset here.

4. Programming workflow

Programming is via the mini-USB jack (or 1/8” jack on early production) using one of two third-party PC tools. Uniden’s own first-party software for this radio (BCToolBox / Sentinel-era predecessors) is long out of support — the practical options in 2026 are community-maintained.

PSREdit300 / ARC246 — the two third-party PC programming tools for the 246T. PSREdit300 (from Starrsoft) is the original commercial PC programmer for the early Uniden trunking scanners and supports the 246T’s codeplug format natively. ARC246 (from Butel) is the Butel-family programmer for the same vintage of Uniden scanners and is the one Jeff has historically used. Both are Windows-only, both require a Windows USB driver for the mini-USB jack (the radio enumerates as a Prolific or FTDI USB-to-serial bridge, depending on production run), and both are paid software with the company history covered in Vol 21. Free alternatives (FreeScan, Win246) exist with mixed compatibility — usable for basic conventional-channel loads, weaker for the trunking system + talkgroup hierarchy.

Codeplug format. The 246T’s codeplug is the older Uniden binary format — incompatible with the BCD396XT, BCD536HP, SDS100, SDS200, and every other newer Uniden scanner. The hierarchy is: Systems → Groups → Channels. Trunking systems carry their own talkgroup tables, control-channel frequency lists, and tone settings; conventional groups are simpler flat lists of frequencies with per-channel CTCSS/DCS/mode settings. There is no codeplug-format compatibility with the newer Uniden lineup — moving a 246T codeplug to a BCD396XT is a manual re-entry job, not a file conversion.

Direct front-panel programming is supported and is the right call for adding a single conventional channel in the field, or for one-off frequency edits when you don’t have a laptop. Programming a full county trunked system from the front panel is tedious but possible — Uniden’s manual walks through the menu hierarchy. For initial system loads, use PC software; for incremental field tweaks, use the keypad.

Programming workflow in 2026:

1. Pull system data from RadioReference — the legacy database still carries analog Motorola Type II / EDACS / LTR system definitions for the systems still on air. RadioReference can export a 246T-compatible codeplug fragment for systems it knows about.
2. Load PSREdit300 or ARC246 on a Windows machine (a VM works fine; the USB-to-serial driver is the only OS-touching piece).
3. Connect mini-USB, set the COM port in the software, read the existing codeplug as a backup.
4. Edit in the software: add/remove systems, add/remove conventional channels, set scan-list membership, set lockouts.
5. Write the codeplug back to the radio. Power-cycle to verify it took.
6. Save the codeplug file to disk and version it (see §5).

5. Codeplug backups

Codeplug files for this radio live in ../../programs/uniden-bc246t/. Most recent backup: TBD — verify with Jeff (the radio hasn’t been programmed in some time; the on-radio codeplug is the most current state).

The 246T’s codeplug format is the older Uniden binary format — incompatible with every newer Uniden scanner in the lineup (BCD396XT, BCD536HP, SDS100, SDS200, Homepatrol). Backup discipline is therefore separate from the newer-scanner backup process. The codeplug is small (a few tens of KB), so multiple dated snapshots cost nothing.

Backup convention:

../../programs/uniden-bc246t/
├── codeplug_YYYY-MM-DD_brief-description.246  (PSREdit300 format)
├── codeplug_YYYY-MM-DD_brief-description.btl  (ARC246 / Butel format)
└── README.md                                  (current state, history, edit log)

Restore is the reverse of programming: open the codeplug file in PSREdit300 or ARC246, write to the radio, verify on power-cycle.

Cadence is light — this radio sees few programming edits per year. One backup after any meaningful change is sufficient. The flagships (SDS100 Vol 10, SDS200 Vol 11, BCD536HP Vol 12) get the active programming attention.

6. Field use

Antenna pairing. The BNC jack is the 246T’s standout feature for field use — it accepts every aftermarket whip and mag-mount with a BNC connector, of which there are many. The stock telescoping whip is mediocre on every band; replace it.

• Daily-use whip: Nagoya NA-771 dual-band (2m/70cm) on a BNC-to-SMA adapter. ~38 cm, ~$25, gives +6 dB on 2m and +3 dB on 70cm over the stock antenna. The right call for ham-band monitoring and most VHF/UHF public-safety listening.
• Wider-coverage whip: Diamond RH77CA (similar form factor, also dual-band). Same approximate gain story as the NA-771.
• NMO mag-mount: any quality dual-band NMO antenna on a magnetic base, BNC pigtail, run out to the roof of the vehicle. Adds 3-6 dB over a handheld whip and gets you above the body of the car.
• Outdoor base setup: a discone (Diamond D-130J, Comet DS-150S) outdoors via 50 ft of RG-58 or LMR-240 to a BNC connector. Overkill for a handheld but works if the radio is desk-bound.

See [Antennas Vol 9 (Portable & mobile monopoles)](../../../Hack Tools/Antennas/02-inputs/volume_sources/vol9.md) for the full handheld-whip menu and [Antennas Vol 29 (Use-case Matrix)](../../../Hack Tools/Antennas/02-inputs/volume_sources/vol29.md) for the per-radio recommendation table — the entries for the legacy Uniden handhelds apply equally here.

Posture. The 246T is a bench-drawer radio. The use cases that pull it out:

• Confirmed analog Motorola Type II systems still on the air in 2026. Some county sheriffs in rural areas remain on analog Type II because the modernization budget never landed. Check the current RadioReference listing for your county before assuming the system is dead.
• Historical verification. “What does this old EDACS recording actually sound like in real time” — the 246T will tune the system if it still exists, and demodulate it the way it was meant to be demodulated in 2005.
• NASCAR / race-day pit-row monitoring. Pit crews and spotters historically ran analog Motorola Type II business-band systems. Some of this has migrated to P25; some hasn’t. The 246T covers the un-migrated.
• Demonstration / nostalgia. Showing somebody what a scanner from the late-2000s looked and sounded like.

The 246T does not earn the go-bag slot. The SDS100 covers everything the 246T does, plus all the modern digital modes, with better sensitivity. If only one handheld scanner can come with you, take the SDS100.

7. Tips and tricks

• The analog Motorola Type II decoder is genuinely good. Where a flagship scanner with a busy DSP can occasionally lose control-channel lock at marginal SNR, the 246T’s simpler chain tends to hold lock longer. If you’re hunting an analog Type II signal at the edge of coverage, the 246T may actually outperform the SDS100 on raw control-channel acquisition. Voice quality once locked is FM, full-stop, and identical between the radios.
• NiMH battery memory effects matter on this radio. NiMH chemistry does not develop memory the way old NiCd did, but it does develop a “voltage depression” effect from chronic shallow discharge that looks like reduced capacity. Periodically (every 10-20 cycles) run the cells to genuine empty (until the radio shuts off under its own power) and then fully recharge. This restores the voltage curve. The Eneloop generation of low-self-discharge NiMH tolerates partial discharge cycles better than older cells, but the full-discharge cycle every few months is still good practice.
• Conventional analog scan rate is faster than every digital scanner in the lineup. The 246T claims ~100 channels per second on conventional scanning; the digital scanners (SDS100, BCD396XT) drop to 30-60 channels/second because each channel demands a DSP demod attempt. If you’re plowing a 500-channel conventional list looking for activity, the 246T finishes the sweep faster.
• Replacement BNC connectors are $2-5 and a five-minute solder job. The antenna jack is a standard female BNC mounted on the main PCB with a single ground tab and a center pin. If the jack ever gets sloppy, replace it — don’t tape over the problem.
• The mini-USB programming jack is the weakest mechanical point. If you program this radio frequently, the jack eventually wallows out. Replacement micro-USB jacks (or the original Mini-B if you want to preserve cable compatibility) are available on LCSC for $0.50; the replacement job is a 15-minute hot-air or careful iron job on the main board.
• The cellular block (824-849 / 869-894 MHz) is permanent in US-market units per Part 15.121. This was never user-defeatable on the 246T. The 800 MHz public-safety and 851-869 MHz business-band trunked allocations are fully coverable; cellular voice is not.

8. Resources

Manuals:

• ../manuals/uniden-bc246t/BC246T Owners Manual.pdf — the original Uniden user manual (~80 pages, covers menu hierarchy, trunking setup, conventional programming, all menu options)
• ../manuals/uniden-bc246t/BC246T Quick Start.pdf — laminate-friendly front-panel cheatsheet — TBD verify with Jeff whether this is in the manuals folder or needs to be downloaded

Vendor / community:

• Uniden legacy product page: https://www.uniden.com — the 246T is end-of-life; documentation is in the legacy-product archive
• RadioReference BC246T wiki: https://wiki.radioreference.com/index.php/BC246T — the community knowledge base, with current programming notes, ARC246 / PSREdit300 setup guides, codeplug-format reference
• RadioReference frequency database: https://www.radioreference.com — the source-of-truth for whether a given local system is still on analog Motorola Type II / EDACS / LTR (and thus monitorable on this radio) or has migrated to P25 (and is not)

Third-party programming software:

• PSREdit300 (Starrsoft): http://www.starrsoft.com — paid Windows tool, the original commercial PC programmer for the 246T-vintage Uniden trunking scanners
• ARC246 (Butel): https://www.butel.nl — paid Windows tool, the Butel-family programmer for the same generation
• FreeScan: https://www.freescan.eu — free Windows tool with partial 246T support (conventional channels yes, trunking systems mixed)

Cross-references:

• Vol 1 (Overview, decision graph) — where this radio sits in the lineup
• Vol 13 (BCD396XT) — the digital handheld successor; what the 246T points to when “I need P25 too” is the question
• Vol 10 (SDS100) — the modern flagship handheld; the radio that has fully superseded the 246T in active use
• Vol 15 (BC350A) — sibling legacy Uniden, desktop form factor, analog-only
• Vol 21 (Programming software landscape) — the full deep dive on PSREdit300, ARC246, FreeScan, ProScan, Sentinel, and the Uniden CPS history
• [Antennas Vol 9 (Portable & mobile monopoles)](../../../Hack Tools/Antennas/02-inputs/volume_sources/vol9.md) — handheld whip menu
• [Antennas Vol 29 (Use-case Matrix)](../../../Hack Tools/Antennas/02-inputs/volume_sources/vol29.md) — per-radio antenna recommendations including the legacy Uniden handhelds