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Re: FT817 and FT 897 V/UHF use
Posted: Fri Apr 06, 2012 8:06 am
by VK5PJ
Hello to you all,
does anyone know the max current raiting for the linear keying line (TX Gnd) on the 8pin mini DIN on the FT817? I have looked through my manual many times for it but cannot find any values for its.
Re: FT817 and FT 897 V/UHF use
Posted: Fri Apr 06, 2012 8:31 am
by VK5ZD
VK5PJ wrote:Does anyone know the max current raiting for the linear keying line (TX Gnd) on the 8pin mini DIN on the FT817?
The transistor used is a 2SD2211 which has a maximum Ic of 1.5A. Having said that, I'd suggest keeping it below 500 mA (my personal opinion).
73
Iain
Re: FT817 and FT 897 V/UHF use
Posted: Sat Apr 07, 2012 5:45 pm
by VK2TDN
VK3ALL wrote:yes there is a hi swr warning
presumably you mean when operating on VHF or UHF ??
you didnt answer my Q as to what antenna you have in the V/UHF port ??
but a hi SWR warning there indicates you have an antenna or feedline prob on the V/UHF mode
cheers
Dave
Re: FT817 and FT 897 V/UHF use
Posted: Sat Apr 07, 2012 7:50 pm
by VK2AAH
I'm a bit surprised that no-one has suggested the very first thing I would do... have you connected a dummy load to the antenna port displaying high VSWR? If transmitting into the load results in the SWR alarm disappearing then your fault is external to the radio. If it is still there then you have an internal fault. And check your lead from the radio with a multimeter... you could have a dud lead.
Cheers,
Richard
VK2AAH
Re: FT817 and FT 897 V/UHF use
Posted: Sat Apr 07, 2012 8:58 pm
by VK2TDN
VK2AAH wrote:I'm a bit surprised that no-one has suggested the very first thing I would do... have you connected a dummy load to the antenna port displaying high VSWR? If transmitting into the load results in the SWR alarm disappearing then your fault is external to the radio. If it is still there then you have an internal fault. And check your lead from the radio with a multimeter... you could have a dud lead.
Cheers,
Richard
VK2AAH
well I was getting there but its been a bit of a struggle getting answers
to existing basic questions
Dave
Re: FT 897 birdy as posted by ZL2WHO
Posted: Tue May 08, 2012 2:57 pm
by VK7PD
I have an FT 857 and 817 and both have spurious responses when trying to receive 45.250 MHz, so this appears to be normal for that series of receivers. No doubt the manufacturer would point out that this frequency is not in an amateur band. It's just a shame that this problem is so close to the vision frequency of channel 1 NZ because it is a very handy propagation indicator.
73,
Peter