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G0FTD > FT817 12.12.06 21:50l 43 Lines 1574 Bytes #999 (0) @ WW
BID : 080199345PZT
Read: GUEST DL1RX VE7HFY
Subj: Re: Fooling the 817 shut down?
Path: DB0FHN<DB0FOR<DB0SIF<HB9EAS<DB0CZ<DB0GE<DB0LJ<DB0RES<ON0AR<IW2OAZ<
CX2SA<GB7YFS<GB7PZT
Sent: 061212/1923Z @:GB7PZT.#24.GBR.EU [Kidderminster] #:19908 XSERV410h
Date: Tue, 12 Dec 2006 19:23:31 +0000
From: g0ftd@gb7pzt.#24.gbr.eu (Andy)
To: ft817@ww
Subject: Re: Fooling the 817 shut down?
VK6BE (welcome back) wrote:-
> I am glad I saw your bulletin, Andy, as I was wondering if there was
> something wrong with my FT817 that caused the battery to run flat so
> quickly.
FT817's are a bit greedy for current. You're looking at about 4hrs receive,
and 2 hours natter time using 2.5w FM. It pays to use ssb ;-)
The highest capacity "AA" style cells are 2600ma - twice the capacity.
But that only gives 8hrs receive, but 4 hours natter time.
If you require more,then your mouth is too big ;-)
Another idea for preserving battery could be to use a noise bridge for tuning
multiband HF whips. Each keydown loses battery life. Especially when also
considering that the internal SWR meter is only (supposedly) accurate when
used at the 5 watts level, meaning you have to use full power to tune the
antenna.
Now then , getting back to fooling the rig's shutdown. As properly pointed
out by John G8MNY, it would be unwise to attempt to use such a method
and expecting a clean signal. (Same as when the volts get low on my
trolley station). But would it be useful at the lowest power level of 0.5
watt?
This could be useful when in the last moment of a mini dxpedition up a local
mountain, and you're desperate to make that vital QSO.
Especially so if you're using the rig to transvert up to the uWave
[I think that means useless waves dunnit ? ;-)] and the last dregs of battery
life could be used up.
- Andy -
G0FTD @ GB7PZT
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