Modeller Support

How to send Macgregor/JR Radio Equipment for repair

If you need to return your MacGregor/JR radio equipment for investigation or repair, please send it to:

MacGregor Industries Limited
Modeller Support
Cordwallis Street

We recommend that all parcels and packages are returned to us via Royal Mail Special Delivery, if you wish to send the item(s) to us via normal post it is AT YOUR OWN RISK. The original moulded foam packaging, or equivalent, provides excellent protection and should be used wherever possible. Remember that MacGregor Industries does not accept responsibility for damage for loss occuring during transit to us.

Include a note giving brief details of the problems that you have experienced, or the work that you wish us to carry out. Details of the events leading up to the problem are useful as these provide invaluable clues. For example, on a computer transmitter, if the display screen is blank and this ocurred immediately after fast charging, we would suspect that the fuse had blown. If the fault occurred after a long period of storage we would suspect the lithium backup battery was flat. Please do not rely on a reference to a telephone conversation to convey details of the fault. Our telephone engineers work under great pressure and it is likely otherwise, that vital details will be missed. Please print your NAME and ADDRESS in BLOCK CAPITALS so that we can correctly identify you. Our records are accessed and filed by means of the customer names and an indecipherable signature, with no further identification, will inevitably cause delays in dealing with a progress or payment query.


Due to the unfortunate news that JR Propo closed at the end of 2016 we are no longer able to repair JR 35MHz or DSM2 transmitters.

For all JR 35MHz / DSM2 - 2.4GHz transmitters repairs, please contact Model Radio Workshop.

Contact: Mike Ridley

You can call Mike between 9.30am and 4.30pm Monday to Friday on: 07708 436163
Please only ring this number in the normal work hours listed above.

What to return

If you can positively identify the item or items causing the problem, it is only necesary to return those particular parts of the system. The best way to identify faulty units is to substitute the suspect unit with a known working item. This is easy in the case of servos as you usually have more than one, but if you have no substitute parts available, modelling friends can sometimes be coerced into lending their units for test purposes. Work methodically through the system, substituting suspect items ONE at a time until the faulty item is identified. It is also a good idea to remove items from the model and test on the bench, in case the installation is the cause of the problem. Be careful not to jump to conclusions. Once you have identified the faulty item, return all of that item. For example, if you have identified the faulty item as the transmitter, do not remove the battery before dispatch as that may be the very part causing the trouble.

We reserve the right not to service or repair any JR product not originally supplied by us when such items are accepted an additional service charge will apply.

If you suspect that your repair is to be covered under warranty please supply a copy of your sales receipt as proof of purchase.

Cost effective?

Be realistic in your expectations of repair costs. Common sense suggests that spending ten pounds on labour, plus return post and packaging, plus VAT on an item that costs say twenty pounds new in model shop, is not money well spent.


Upon receipt, all items sent for repair are examined and a full written report is given detailing the test results, any necessary repairs and the associated costs. Since any fault diagnosis usually involves effecting a repair, we do not normally send an estimate before completing the work. If you specify that you require and estimate only, we will endeavour to give one but the figure is necessarily approximate. Please note that in the case of an examination where no fault is found, the investigation cost must still be paid in full.

Please note that in the case of an examination where no fault is found, the investigation cost must still be paid in full.


Payment may be made by Cheque, Postal Order, Credit Card (Visa, Mastercard or American Express) or by Debit Card. Credit and Debit Card payments are accepted by telephone. For Visa, Mastercard and American Express, the card number and expiry date are needed. For Debit Cards, the card number, the issue and expiry date are required and for a Switch card the card issue number is also required. The name and address of the cardholder is required for all card transactions. Once payment is received, the goods are returned to you by a secure postal method. If you can provide a business address we can alternatively send the parcel using the Securicor 24 hour service . If we advise that the repair is uneconomic, our only charge is the return post and packaging.

Routine Servicing

Radio equipment does need servicing in the way that cars do. Eletrical component failure, while very rare is usually instanteous and catastophic. This means that a successful check for correct operation does not guarantee that the correct operation will continue. Even a worn item such as a feedback pot on a servo can pass testing with flying colours and yet still fail shortly afterwards. The only parts of a radio system that can benefit from routine checking are the transmitter and receiver Ni-Cad batteries, to verify their overall capacity, plus all electrical connections such as plugs and sockets or switches, to confirm that they have a reasonably low contact resistance. If you follow the advice from the "Looking after you Ni-Cads" and "Onboard Ni-Cad Monitors" articles on this website you will be doing this automatically at every modelling session.

DIY Checks

1. The crystals are the most fragile parts of a radio control system. Suspect the receiver crystal first if the system misbehaves.

2. Eliminate the switch harness by pluging the Ni-Cad battery directly into the receiver.

3. If the transmitter is dead, check whether the fuse is blown. The fuse is usually accessed by removing the transmitter back cover.

4. Ensure that the transmiiter and receiver modulation systems correspond. PPM, "S" PCM or "Z" PCM.

5. If a recently modified system fails to work, do check that the transmitter and receiver crystals are for the same frequency.

6. On older systems, if one channel is locked at neutral, check the channel reversing switch for that channel. It may be half way between forward and reverse and moving it one way or the other will effect a cure.