Differences

This shows you the differences between two versions of the page.

--- packet:tait2xxx [2023/04/17 01:04] – 2e0sip
+++ packet:tait2xxx [2023/04/18 17:33] – m0lte
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+======  Tait T2000 series ======
 The Tait T2000 series are an older generation of "PMR" radios that have become popular with Amateurs due to their availability, reasonable pricing and models available for the 70cms, 2m and 4m bands (Note they're single band only).
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 - Good
 - Bad?
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   * **5mm socket, 3/16 socket, needle nose pliers, or small adjustable spanner** - to remove the DBXX connector screwlocks
-  * **Tait Release Key / Small flat blade screwdriver** - to remove the mounting bracket
+  * **[[https://www.ebay.co.uk/itm/234601536961|Tait Release Key]] / Small flat blade screwdriver** - to remove the mounting bracket
 ===== Removing the mounting bracket =====
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 If yours is more stubborn you will need to insert the security key or similarly shaped object into the hole in the left hand side of the control head near the volume control, which will release a tab and allow you to remove the radio body from the bracket.
-If you don't have a key or similar object, and don't mind some minor scratches to the bracket you can prise the two metal shells apart and remove them that way.
+If you don't have a key or similar object, and don't mind some minor scratches to the bracket you can prise the two metal shells apart and remove them that way. Insert a thin flat blade screwdriver or similar implement in the gap between the two metal shells, and ease them over the plastic bumps (Marked with red dots in the image below) one at a time. Repeat for both sides, top and bottom.
-TODO: Add picture of bracket
+{{:packet:tait-t2000-bracket.jpg?direct&600|}}
+===== Opening the radio =====
+With the bracket removed, you will see 4x T20 Torx screws on the bottom of the radio. Undo them, and pull off the top shell of the radio.
+{{::tait-t2000-external-screws.jpg?direct&400|}}
+===== Removing the Logic and Options boards =====
+With the top shell removed, you'll be presented with the logic and options board if fitted.
+If the options board is fitted, first of all under the screwlock connectors either side of the DB9/DB15 connector on the back of the radio with an appropriate sized spanner / socket or needle nose pliers.
+{{:packet:tait-t2000-db-screwlocks.jpg?direct&400|}}
+Then remove the ~6 T20 Torx Screws securing the PCB to the radio body.
+TODO: Picture
 ====== Reassembly ======
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 ===== TS02491 =====
-These were found in a pair of radios purchased from a radio rally. There was no indication on the outside of the radio these boards had been fitted. The boards appear to operate as data modems, possibly 9600 baud GMSK. Note this isn't compatible with G3RUH's 9600 baud specification.
+These were found in a pair of radios purchased from a radio rally. There was no indication on the outside of the radio these boards had been fitted, and it's not clear what functions the options board provides. It's a busy board and no schematic or documentation has been found at present, and the presence of the TCXO circuitry usually found on a separate module makes it difficult to just remove the options board without somehow providing the missing TCXO function.
-It's a busy board and no schematic or documentation has been found at present, and the presence of the TCXO circuitry usually found on a separate module makes it difficult to just remove the options board without somehow providing the missing TCXO function.
 Almost all the pins on the 15 pin DE-15 connector are connected to the rest of the circuit with small SMD resistors, so some scope exists to remove them and insert "bodge wires" to bridge out the rest of the circuit but this is so far untested.
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 {{:packet:tait-t2000-ts02491-b.jpg?direct&600|}}
-===== Tait T2000-A81 Multi Interface Board Kit =====
+===== Tait T2000-A81 =====
+A known-good, basic interfacing board which exposes Audio In, Audio Out, PTT and Ground on the accessory connector on the back of the radio.
+TODO: Add pinout, wiring instructions, pictures of interface with NinoTNC etc
 {{:packet:t2000-a81.jpg?400|}}
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 {{:packet:t2000-a81-rear.jpg?400|}}
+====== Pin Outs ======
+===== Power =====
+The radios require 13.8v DC but will accept between 10.8V to 16v. Approximate current consumption is 300mA at idle, and up to 7A when transmitting on full power.
+{{:packet:tait-t2000-power-pinout.png?direct&400|}}
+Pinout when looking at the rear of the radio, into the connector.
+^ Pin      ^ Usage      ^ Notes          ^
+| 1   | Ignition Sense    | Not normally connected |
+| 2   | Not used | |
+| 3   | DC in | |
+| 4 | Speaker Ground | |
+| 5 | External | Not normally connected |
+| 6 | Internal Speaker Link | Bridge to pin 4 to enable internal speaker |
+| 7 | GND    | |
+| 8 | External Speaker Output | To use external speaker, remove link between 4 and 7 and wire speaker between 8 and 4 |
+In a pinch, 2.8mm spade connectors fit firmly over the pins in the connector. There's a slight risk you might damage them, but if its a £5 radio from a rally you might not be too concerned. The spade connectors fit firmly and probably won't be pulled out by accident.
+{{:packet:tait-t2000-power-spades.jpg?direct&400|}}