Replacement battery for YAESU FT-817

Product Information

thing you'll need is a horizontally polarised antenna, preferably a small beam. Height helps but is not imperative; TX Frequency Coverage: 160 - 10 Meters, 50 MHz, 144 MHz, 430-450 MHz, plus Alaska Emergency Channel (5167.5 kHz). There really is no right answer to this question. Also, each and every one of us has a different requirement. So, what we really need to do first, is answer a few questions. I recently received one of these and installed it in my 818 last light. It is now going though a "full time receive" cycle and so far the battary lasts significantly longer - let's see after a few cycles.

FT-817ND - FT 817 sales at Radioworld uk FT-817ND - FT 817 sales at Radioworld uk

Battery technology has advanced since 2000. You can now get internal batteries with significantly more capacity than 600mA/h. This video is an example with 2450 mAH NiMH types.The FT-817 is stable enough for casual HF operating but could be even more stable. Better stability is desirable if you operate frequency critical digital modes or 70cm SSB where variations become significant. Fitting a TCXO

W4RT Electronics - WiMo

Especially when the bands are crowded, operating CW with a standard FT-817/FT-818 can be a trying experience. A CW filter can make a great improvement to reception. Filtering can either be done in the receiver's audio One possibility is an audio processor such as the "One BIG Punch" from W4RT. I haven't tried it, and it's not an option I would choose. Audio processing can actually end up making your speech less intelligible, because it produces in-band distortion products. Put simply, if you clip a 400Hz signal, it creates harmonics at 800Hz, 1200Hz and so-on. RF Speech Processor One question that sprang to mind after getting the 12V switched mode PSU was: would using a 12V supply affect the battery charging function of the FT-817? Would the batteries need to be charged for longer? Would the voltage be sufficient to charge the batteries at all? First, because the cell is LIPO, it has a separate charger and a separate charge power input, and the manual rightfully strongly advises against using the NiMH charger..

Yaesu FT-817ND Amateur Radio | HF/VHF/UHF Mobile Transceiver

Even when band conditions are tough on SSB or a major contest makes competition fierce, refuge can often be sought on the digital modes. The design calls for protected 18650s to be used. These have a circuit in them that isolates them if you try to draw current when the cell is discharged to its minimum voltage. i.e. you can’t over discharge them. It also disconnects them if the voltage applied to the cell exceeds 4.2V. With that type of 18650 and the green wire in place, the whole system looks to be fine and dandy. There are three models. The early FT-817, the later FT-817ND and the much later FT-818. There's not a lot of difference between them. However the ND model is Overall I give Yaesu only 7 out of 10 for this radio, with the comment "could do better." But there's nothing else quite like it on the market at the moment. If you want a very small all mode HF and VHF radio, better get an FT-817!

FT-817 Cheat Sheet - RadioManual FT-817 Cheat Sheet - RadioManual

I've had good results from sealed lead acid (cheap but heavy), NiMH and, more recently, LiFePO4 battery types. Note that the latter is quite critical with charging and if you leave it for a while its voltage Summer can turn often dead bands into active segments with massive signals. The cause is sporadic-E propagation, a phenomenon most noted in mid summer, and, to a lesser extent, mid-winter. The good news is that when operating on the 2.5W mode (the default for battery power) the FT-817 appears to deliver the full 2.5W regardless of SWR. I guess this applies to the lower power modes too.

A portable power supply

It is possible to work SSB DX using a barefoot FT-817, even with modest antennas. However, it certainly helps to pay attention to your transmitted audio, to maximize your chances of being copied when you are down in the noise or competing with higher-powered QRM. A speech processor will give your SSB signal valuable extra "punch". Ingnore what some diehard VHF/UHF SSB operators say - the FT-817/FT-818 a perfectly capable performer at these frequencies. All-band" coverage. The FT-817 covers all amateur bands from Top Band to 70cm (excluding the UK-only 4m band and the US-only 222MHz band.) It also has pretty extensive general coverage capabilities. This makes it an ideal "do-anything" radio, suitable for whatever kind of operation you feel like doing. My portable operating sessions are typically 2 to 3 hours. Sometimes up to 4 or 5 hours if it's a field day contest. It's worth doing a power budget but generally you're looking at a 4 to 8 Ah battery capacity. The bad points outnumber the good points. Whilst some allowance must be made for the FT-817's small size and portability, especially with regard to ergonomics, several of these criticisms could have been averted using existing technology.

Really Nice Battery Solution for FT-817 - SOTA Reflector Really Nice Battery Solution for FT-817 - SOTA Reflector

The processor replaces the standard microphone element with an electret type that has more of a treble emphasis. This may not suit all voices but it can enhance copy under difficult conditions, compared to the normal Yaesu rather muffled audio. I think it sounds excellent on FM, too. Joachim, DF4ZS makes an RF processor board that can be installed inside the FT-817 microphone. It costs about 65 Euro. You can either fit it yourself or send your mike to Germany with return postage and Joachim will fit it for you.A surprising number of FT-817/FT-818 owners use their rig on HF, and maybe VHF/UHF FM repeaters, but not on VHF/UHF SSB. The Yaesu FT-817ND is the world’s first self-contained, battery-powered, multi-mode portable transceiver covering the HF, VHF, and UHF bands,For more than four decades, Yaesu has been a world leader in the design and manufacture of high-performance multi-mode base station and mobile transceivers, as well as FM hand held. The most comprehensive computer control program for the FT-817 is FT-817 Commander. This program is the predecessor to Ham Radio Deluxe, but it has many features specific to the FT-817, such as memory management, which HRD does not. Although FT-817 Commander is unsupported, and does not claim to support the FT-817ND, it appears to work, although I have not used it a lot. Do not submit a product review critiquing another review or reviewer. Reviewers should be able to share their product opinion without being publicly criticized. if the island is a separate IOTA group to where you normally live you may attract the attention of IOTA chasers.