Linear Delta 3 DT Remotes 310 MHz 8 Dip Switches
Linear Delta 3 & DT Remotes — 310 MHz, 8 Dip Switches
The Delta 3 / DT format is Linear's classic radio system: 310 MHz with 8 dip switches inside the transmitter. It has been fitted to residential garage door openers and community gate operators for decades, and it is still the most common Linear format in the field. Everything on this page — transmitters, receivers, complete sets, antennas and spares — runs on that one format.
Check your frequency first. Linear also built 318 MHz Mega Code (learn code, no dip switches), 300 MHz Multi Code (10 dip switches) and 303.875 / 315 MHz Alert (8 dip switches). None of them cross over. Count the switches in your existing remote: eight means you are on this page. Ten means you want Multi Code. None at all means Mega Code.
Transmitters
| Model | Linear part | What it is |
|---|---|---|
| DT / DTC / DTA / DTD | DNT00002A | Single-button visor remote. The standard Delta 3 transmitter and the one most people are replacing. |
| DT2A | DNT00017A | Two-button transmitter |
| DT 3+1 | DNT00027A | Three-channel plus one |
| DT4 | DNT00027B | Four-channel transmitter |
| LB Mini T | DNT00026 | Mini key-ring transmitter |
| DTKP | DNT00062 | Wireless keypad — keyless entry on the same 310 MHz format |
| DTG | DNT00072 | Safety edge transmitter |
Receivers and complete sets
If the opener has no Linear radio fitted at all, a set is the straightforward answer — receiver and transmitters matched and ready.
| Model | Linear part | What it is |
|---|---|---|
| DS | DNP00011 | Complete set — receiver plus one remote |
| DD | DNP00006 | Complete set — receiver plus two remotes |
| DR / DR3A | DNR00001 | Single-channel receiver, 24 volt |
| GRD | DNR00101 | Current receiver. Replaces the DRG and DRG-LV. |
| GRD-2 | DNR00102 | Two-channel version of the GRD |
Discontinued receivers — what to order instead
Most of the older DR-series receivers are no longer made. If you are holding one of these part numbers, the current equivalent is in the right-hand column.
| Old model | Linear part | Order instead |
|---|---|---|
| DRG / DRG-LV | — | GRD |
| DR2, 2-channel | DNR00018 | GRD-2 |
| DR4, 4-channel | DNR00023A | Call us — channel count and voltage determine the substitute |
| DR4-12, 4-channel 12V | DNR00057 | Call us |
| DRA, single channel 12V | DNR00012 | DR / DR3A if 24V suits, otherwise call |
| DRQ long-range coax | DNR00013P | Call us — long-range coax needs matching to the site |
Antennas, cases and spares
| Part | What it is |
|---|---|
| EXA-1000 | Antenna kit, AAE00198 — the first thing to try when range has dropped |
| EXA-2000 | Antenna kit, AAE00331 |
| 1066 | Coax antenna kit |
| 109186-01 | Antenna coax wire only |
| 210261 | Visor clip, new style |
| 202559-01 | Visor clip, old style |
| 10A14 | 12V battery for the LB mini remotes |
| RTM | Leather case for mini remotes |
Programming a Delta 3 remote
Open the battery compartment on your existing working remote and note the up/down position of all eight switches, left to right. Set the new remote's switches to the identical pattern. That is the entire procedure — there is no learn button and nothing to press on the opener.
If no working remote survives, open the receiver and read the pattern there instead. Failing that, set both the receiver and the new remote to a fresh pattern of your own choosing — any pattern works as long as both match.
Universal remotes. The LiftMaster 374UT and 380UT will operate a Delta 3 receiver, but they have no physical dip switches — they learn the code from a working remote. If nothing works any more, you need a dip-switch transmitter or a complete DS set.
Common questions
Eight switches or ten? Eight means Delta 3 at 310 MHz — this page. Ten means Multi Code at 300 MHz. They are not interchangeable.
Will a DT work on my gate? Yes, if the gate operator carries a 310 MHz Delta 3 receiver. The format makes no distinction between gate and garage.
My new remote doesn't work. In order: the switch pattern is reversed left-to-right, the frequency is wrong, or the battery is flat out of the pack.
Range has dropped. Almost always the antenna. An EXA-1000 gets the wire clear of the metal enclosure.
Other Linear formats
Mega Code 318 MHz · Multi Code 300 MHz · Alert 303.875 & 315 MHz · Extended Range · all Linear remotes
Not sure what you have? Send a photo of the remote and of the receiver on the opener to parts@gatehousesupplies.com, or call 866-965-5599. We have been supplying Linear since 1993.