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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.

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Frequency range: 7/14/21/28/50/144/430MHz, Max Pwr input: HF/50MHz: 100W (SSB/CW), 50W (AM/FM), 144/430MHz: 50W (All mode) Height Max 2.2m, 0.6m for transporting * Weight: 930g. Supplied with radiating elements, radial elements for VHF/UHF, radial wires + spare radial wire, Allen key.

The ATAS-25 utilises a manual tuning system which resonates the radiating element for lowest SWR without the need for expensive mono-band resonating whip assemblies. It allows dual frequency operation on HF or 50MHz and either 2m or 70cm (duplexer not supplied). A very handy feature is that the ATAS-25 is designed to mount directly onto a standard camera tripod mount (not supplied) and makes up a portable antenna system ideal for tempory field operation but not recommended for long-term outdoor installation.

For some models, you may wish to purchase a diplexer or triplexer to avoid moving your cable from one antenna jack to another. When using the ATAS-25 with the FT-817, set Menu #07 to REAR for all bands.