| |
GM7HUD > FT-817 30.12.06 01:15l 43 Lines 1510 Bytes #999 (0) @ WW
BID : 3F4242GM7HUD
Read: GUEST DL1RX DG4IAK VE7HFY
Subj: Re: Green wire mod,empty cell case
Path: DB0FHN<DB0FOR<DB0MRW<OK0PPL<DB0RES<DK0WUE<7M3TJZ<ON0AR<GB7CIP<GB7YFS<
GB7LGS<GB7ESX
Sent: 061229/1816z 47051@GB7ESX.#31.GBR.EU $:3F4242GM7HUD [Witham, Esx]NNA V3.1
G4XNH wrote:-
>
> Using the voltage monitor on the rig itself, 12.4v is registered. Fine,
> close enough to 12v, not a problem one might think. Wrong.
>
> Using the various outputs, 0.5W, 1W, 2.5W and the full 5W which is what
> one uses the car supply FOR, one finds that the voltage DROPS considerably
> switching to high.
>
> The voltage varies between around 11.8v and on the 5W setting, it drops to
> 10.7v.
With a 12V (nominal) SLA connected, the voltage monitor on my 817 under
reads. With the battery terminal voltage measured at 13V, the 817 reads
12.4V. On FM high power (5W) the voltage display drops to 11.5V
> This of course is not enough to supply 5W so it immediately goes
> into the three flashing bars mode which tells you that it is only putting
> out 2.5W. :-(((((
>
3 Flashing bars is 5W, 3 steady bars is 2.5W
> I have yet to check my cigar socket voltage. I suspect that it will NOT be
> the expected 13.8v which is standard voltage for a car battery. There is
> obviously not enough voltage to enable the regulator to regulate.
>
You'll find the 817 is under reading.
> I am wondering how I can "UP" the voltage to the cigar socket. :-) Highly
> unlikely. I suspect that I will have to feed a fused lead directly from
> the battery as I did with my FT-290R to prevent such problems.
>
You may have "iffy" contacts making your case worse, but the voltage
display is informative rather than accurate.
Have you measured the power out into a dummy load?
73 de Andy GM7HUD
Read previous mail | Read next mail
| |
