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 Ss6900n voltage

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Big Massey
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Call Sign : 108-CT-307
Posts : 23
Times Thanked : 0
Join date : 2021-01-31
QTH or Location : CUMNOCK
Equipment Used : Ss6900n

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PostSubject: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 12:44 pm

I've recently noticed when flicking through the 6900 function menu , the Tdl mode has a battery voltage read out when I key up it was only reading out 10.1v although the power supply is reading 13.9v when I checked it , has anyone ever noticed this or maybe you could and let me know if it's not only mine that seems off
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SangueG
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SangueG

Call Sign : 26-CT-3971
Posts : 109
Times Thanked : 7
Join date : 2021-01-30
QTH or Location : Cirencester, Gloucestershire
Equipment Used : CRT SS 6900N, home-made antennas, DX-300 for SWL

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 1:16 pm

I suspect the radio inbuilt meters aren't perfect. But I run my 6900 on a 12.2V PSU, which reads 12.1 on receive and 11.7 on transmit on my radio, so there's a bit of a difference between our two.

Mine is a version 6, if that makes any difference to compare.
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BigTone
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Call Sign : G8YMW or 26CT4498
Posts : 81
Times Thanked : 17
Join date : 2019-07-16
QTH or Location : Lincoln and Finningley
Equipment Used : CRT 9900, Yaesu FT817, Kenwood TS570, Icom 910
Age : 66

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 1:48 pm

Perhaps you need thicker 12v leads.
Fred in the shed had similar problems

https://www.youtube.com/watch?v=F7lGmeFrZ24
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Alan Pilot
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Alan Pilot

Call Sign : 163-CT-220...MW7TTA
Posts : 874
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Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A.

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 2:06 pm

I had the 9900 and that did the same.
Put it down to the inbuilt meter as said above the radio worked perfectly.

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Seasick
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Seasick

Posts : 79
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Join date : 2021-02-19
QTH or Location : Norfolk
Equipment Used : Uniden BCT 15X

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 3:16 pm

Big Massey wrote:
when I key up it was only reading out 10.1v although the power supply is reading 13.9v when I checked it.

Have you put a multi meter across the poles on your power supply, to get a third reading as you key the mike? It may back up one of your readings.

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Big Massey
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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 6:54 pm

When I turned the radio power back to 4 watt it reads 12.7v as I turn it up it drops possible not enough amps ??
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BigTone
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Call Sign : G8YMW or 26CT4498
Posts : 81
Times Thanked : 17
Join date : 2019-07-16
QTH or Location : Lincoln and Finningley
Equipment Used : CRT 9900, Yaesu FT817, Kenwood TS570, Icom 910
Age : 66

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 7:09 pm

Thin power leads or your psu is not up to the job.
What is the rating of your power supply?
You  will want the biggest you can afford
IMO The ABSOLUTE minimum for that radio will be 10 amps continuous
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Seasick
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Seasick

Posts : 79
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Join date : 2021-02-19
QTH or Location : Norfolk
Equipment Used : Uniden BCT 15X

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeThu Mar 18, 2021 11:01 pm

Big Massey wrote:
When I turned the radio power back to 4  watt it reads 12.7v as I turn it up it drops possible not enough amps ??

AM/FM & SSB  have different duty cycles, so if that is happening based upon the power setting of the radio, then it has nothing to do with what the radio is drawing from the power supply & is more likely to be caused by a poorly designed/built voltage meter on your radio. 

Is that 4 watt reading what the radio is showing you. What the power supply is showing you, or what you know is happening as you have verified it with a multi meter, which backs up one of the others?
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26uk81
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Call Sign : 26UK81
Posts : 67
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Join date : 2020-06-06
QTH or Location : Oxford
Equipment Used : ss 6900n
Age : 36

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PostSubject: Re: Ss6900n voltage    Ss6900n voltage  Icon_minitimeFri Mar 19, 2021 1:05 am

Take no notice of the radio voltage readout.   I reprogrammed mine recently and thought the default 9 volts for the low battery alert / lockout was too low to start the car.   When I increased it to 11, the radio became unusable with the engine turned off.  Set it back to 9.   I generally keep my engine running whilst hill-topping anyway if it is cold out.
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