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Welcome to, the best site on the internet for modifications repair instructions and improvement of HAM rigs, HAM modems, etc.

Here you will find modifications of many types of HAM radios, microphones, power supplies, modems etc. You can find how to modify a radio to receive and transmit out of range, you can find how to modify a radio to use high speed packet modems, and how to modify the radio/modem to get better performance.

Right now the database contains 5542 articles. Use the navigation menu on the left side to easy find your equipment. You can also use the search option, it is very fast. See the search help link for more information.

If you have a modification, and it is not here, please send the modification. Use the contact form to get in contact with If you would prefer to remain anonymous, then write it in the contact form.

Thanks to those who have uploaded articles to, without the uploads have not been such an excellent technical forum.

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Before you do anything, please read this.!

The modifications are not verified and tested by, so if you try some of the article on your own equipment, it's on your own risk.

Performing modifications of some equipment may be a violation of local laws. If you have any doubts, do not perform the modification.

Have you problem with an article that doesn't work, don't contact for help. Contact the author of the modification - if available, or write a message in the forum about the problem. Any messages to about article that doesn't work will not be answered.

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