Re: Tx oscillation on 432 MHz
Hi,
When the problem first manifested itself the radio was powered by an internal 3S LIPO (from Windcamp) battery.
When retested on the bench it was powered by an external 3S LIPO via the
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Archiver
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#102760
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Re: FT817 audio mod - PCB pad delamination
Thanks Simon!
After spending some quality time with the service manual I was able to trace Vol 2 (the signal I'm working with) to Pin 49 on J1008 on the main board, as well as a few other points that
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John VA7JBE
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#102759
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Re: Tx oscillation on 432 MHz
Folks, something to keep in mind… when a PA is replaced, rarely does a tech check every band and mode, while we assume that this is done.
I doubt it if anyone checks everything out.
I suspect a
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[email protected] <kg9hfrank@...>
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#102755
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Re: Tx oscillation on 432 MHz
Hi Ken When testing it in the shack, I monitored the output signal on my ic706. When it was working ok, the signal was sounding good on all modes. but when the output power went straight to the max
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Archiver
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#102754
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Re: Tx oscillation on 432 MHz
blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } I seem to remember a piece of
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donaldhawbaker
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#102753
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Re: Tx oscillation on 432 MHz
Hello Andrew,
Working OK on the rear aerial socket but taking off when using
the front one suggests RF feedback into the mic' to me.
I wonder if there is a poor ground connection on the front
socket
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g8beq
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#102752
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Re: Tx oscillation on 432 MHz
How are you powering the FT-817? If via the DC power jack, do you have the snap-on toroid that Yaesu supplied for this problem in the power line?
Vy73 - Mike - KD5KC.
El Paso, Texas -
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Mike Olbrisch <mike-2007@...>
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#102758
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Tx oscillation on 432 MHz
I recently had the final stage of my 817 replaced/upgraded to a new final and I was told the board installed is the same as the ND final.
All looks good on all bands, except that on occasions, the
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Archiver
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#102751
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Re: Buddipole Pole Battery Packs
I have used my original Buddipole 4S2P pack and my newer A123 Systems 12V7 packs with various radios like an FT-857, an Elecraft KX3 with and without the 100W amp and with an Ellecraft KX2. These
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prcradio@...
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#102750
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Re: Buddipole Pole Battery Packs
Hi Andrew. I get about 3 hours out of 1 3S1P Buddi-pole pack. It varies some, but never less than 2 hours and never more than 4 hours. I typically run 5-watts, either SSB or CW. My particular
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Mike Olbrisch <mike-2007@...>
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#102757
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Re: Buddipole Pole Battery Packs
Thank you very much for the quick response Mike.
As follow up questions what power are you using when tx (5 watts or less)?
Also are you using the buddipole charger and if so which one? And
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Andrew Bounds
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#102749
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Re: Buddipole Pole Battery Packs
I have TWO of the 3S1P packs. In short - LOVE THEM!
I chose the 3S pack because it is almost a PERFECT match for the FT-817. Here is why.
Fresh off the charger a single cell is about 3.65v. A 3S
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Mike Olbrisch <mike-2007@...>
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#102756
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Re: Buddipole Pole Battery Packs
I sold my FT-817 long before buying a Budipole battery but have had excellent service from my now very old 4S2P pack. I also bought the $79 charger from Buddipole to go with it.
If you are looking
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prcradio@...
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#102748
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Re: Buddipole Pole Battery Packs
I haven't used Buddypole packs, if I remember correct are A123 litium tech 3.3V nominal per cell so a 3s or 4s may be right (fully charged they are 3.65V).
Lithium is not one tech and there are
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kb1gmx@...
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#102747
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Re: Buddipole Pole Battery Packs
Well... it depends on which battery chemistry you go with as to if
you go with either a 3S1P or 4S1P. If you got with a LiPo battery,
then you HAVE to go with a 3S1P (the voltage of a 4S1P
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[email protected] <n1evh@...>
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#102746
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Re: Buddipole Pole Battery Packs
No, but I do have this one:
http://www.revolutionimager.com/collections/products/products/additional-12v-battery-pack-9800mah
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iais604@...
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#102745
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Buddipole Pole Battery Packs
Has anyone used the buddipole battery packs with the FT817ND and, if so, which pack did you select and why? I'm looking at either the 3s1 or 4s1.
Thanks
Andrew - KD5CQ
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Andrew Bounds
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#102744
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Re: Flashing Screen and no audio on FT-817ND
Hi, all:
Thanks for all the suggestions. Unfortunately, none of them have solved the problem. The PSU used is a good one (Alinco DM-330MV, and I've verified it's putting out the correct voltage and
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afox@...
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#102743
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Re: Replacement Final Board a Cure For Original Problem
IMHO for Yaseu has not admitted it after years of the old final board failing due to low battery voltage, yes the newer PA board, that is over 6 years since the change to newer PA board, is better and
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mccrpt@...
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#102742
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Replacement Final Board a Cure For Original Problem
I recently forgot that i had rechargeable batteries in my older Ft817 (non-ND) and the final eventually failed .. probably due the the batteries discharging way too low. A new final amp board fixed it
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GarySargent@...
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#102741
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