The prices for each kit do not include carriage so please add 4GBP for
You can also use Paypal button below. Their software is set to automatically add GBP6 to cover their fee and my UK post and packing charges. If you are taking up a special offer, please enter the appropriate code and price, otherwise enter the kit name and price. For overseas orders, please increase the kit price by 2 GBP for Europe, and 4 GBP for the rest of the world to cover the extra airmail charges. If in doubt, contact me in advance by e mail. The Paypal payment should be directed to Walford Electronics Ltd. at email@example.com Value Added Tax is not charged and so cannot be deducted for overseas orders. We reserve the right to alter specifications and prices in the interest of improving our products. Goods supplied remain the property of Walford Electronics Ltd. until payment is complete.
Hot Iron is a quarterly newsletter about radio related topics sent to all members of The Construction Club. Apart from general amateur radio related topics, if you are purchasing a kit, do consider joining the Club so that you can get the benefit of other people's experiences. Members receive the quarterly newsletter Hot Iron with articles on circuits for amateur radio receivers, transmitters, test gear, antennae, construction methods, new kit developments, and feedback on builders experiences. Articles, notes, experiences, questions, hints and tips from builders other than myself are especially welcome. I will gladly attempt to answer member's questions. To keep it interesting your contributions are essential! Hot Iron does not have advertisements and is usually equivalent to eight or more sides of A4. From Sept 2015 onwards, it will be distributed electronically in pdf file format attached to an e mail. Membership and copies of future Hot Irons are free to all who have told me their e address - that is all I need! You will receive that year's issues that are already out (they start in Sept) and the future issues of Hot Iron as they are ready. Just tell me your e address!
If the numbers of kits wanted are reasonable I may be able to offer a discount when ordered in bulk. My stocks of individual kits are usually small so advance warning for quantity is essential and it is generally best for the course organiser or Club to make such orders. I also suggest that course instructors should emphasize to candidates, especially for less experienced people, the value and thrill obtained from using the built item on air afterwards, instead of just choosing the cheapest that will get you through the exam! Hence I would always recommend a receiver in preference to a simple CW transmitter that is unlikely to be ever used with an unknown brand X receiver! Please do consult me before ordering items for such projects - firstname.lastname@example.org
My objective is to provide kits which provide good value for whatever you decide to spend; consequently I put my design effort into the circuitry, and its cost reduction, because most builders will leave the circuit unchanged but they are often very happy to adapt the mechanical aspects themselves. All kits contain brand new quality components. Like much of life, you get what you pay for so don't expect phenomenal performance from a simple rig! Much effort goes into avoiding parts whose cost would be excessive compared to others in that particular kit - leading eventually to a well balanced design. Another important objective with the more advanced kits, is to provide scope for the builder to customize it. The instructions provided with each kit are extensive and detail the recommended build sequence, with suggested tests after each stage so that confidence grows as the project is built. Part numbers are not printed on the PCB, but for the more complex kits, a unique grid reference system is used to help you locate individual part positions. These kits are not 'build it by numbers' projects and do require the builder to follow the build sequence carefully and to appreciate what should be happening at each stage.
The design work tries to ensure that each kit can be built and tested easily, and will work reliably despite the tolerances on part values and 'disturbances' due to supply or temperature variations. Several models of each kit are built before they are generally released so that there is a high confidence that, if the instructions are properly followed, it will work as intended - but see below about support!
All kits contain the full set of parts required to build the rig in the basic 'open' or unboxed style, this includes all controls, knobs, sockets (and matching plugs if you are unlikely to have them) together with rubber feet. The simpler kits are built in a 'flat' format where the controls are mounted directly onto the main circuit PCB. For others, either a small etched front panel is included for the small upright format, or an extra single sided un-etched PCB (with strengthening braces) is included as a simple front panel which can be attached to the main board. This open style of construction is fine for bench use and gives good ventilation for improved reliability/stability; it also allows access to both sides of the PCB for building/testing. If you wish, the rigs can be easily installed in conventional boxes which is essential for mobile or portable work. In general, my advice is to build the rig in its simplest form first and, after experience using it, then decide what extra controls you want and box accordingly. Quite often, the presets - or the special 'shafted' presets used in simple rigs - can be changed to conventional front panel pots if you want better facilities. This approach gives the least initial cost but allows enhancements when wanted. The photo below shows my bench in early 2015 with two designs going through some tests!
The use of building by stages, with tests after each section, helps to minimise problems; however if you do get stuck, you can always contact me for advice by phone, letter, or e mail. If this fails to eventually get it working, I am quite happy by arrangement to have the kit back for investigation/repair. If it turns out to be my fault through poor design or faulty parts, then I don't charge; however if its a proven design and somewhere the builder has gone wrong, then I make a modest charge based on the time taken to fix it with postage and part costs extra. Whenever you seek advice, or return a rig, please provide as much detailed information as possible on the problem. If you do damage parts, spares are readily available for most rigs but be aware that ordering single resistors is uneconomical!
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