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Check Pin 8 gets its supply either 5V 8v or 12V or raw 13.8

 

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Max Donoghue
 

Pin 8 was showing about 4.1V

On Mon, Jul 18, 2022 at 12:34 PM Andrew Lenton <a@...> wrote:
 

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Hi This is a high gain amp see spec

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73

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Andrew

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From: [email protected] [mailto:[email protected]] On Behalf Of Max Donoghue
Sent: 18 July 2022 17:37
To: Andrew Lenton
Cc: [email protected]
Subject: Re: [YaesuFT847] Check Pin 8 gets its supply either 5V 8v or 12V or raw 13.8

?

Pin 8 was showing about 4.1V

?

On Mon, Jul 18, 2022 at 12:34 PM Andrew Lenton <a@...> wrote:

UPC1677_NEC.pdf
UPC1677_NEC.pdf

 

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Found it

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Pin 8 is supply

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73

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Andrew

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?

From: [email protected] [mailto:[email protected]] On Behalf Of Max Donoghue
Sent: 18 July 2022 17:37
To: Andrew Lenton
Cc: [email protected]
Subject: Re: [YaesuFT847] Check Pin 8 gets its supply either 5V 8v or 12V or raw 13.8

?

Pin 8 was showing about 4.1V

?

On Mon, Jul 18, 2022 at 12:34 PM Andrew Lenton <a@...> wrote:

REN_P12448EJ3V0DS00_DST_19981101.pdf
REN_P12448EJ3V0DS00_DST_19981101.pdf

Max Donoghue
 

Correct, it is labelled a "KEY" line in the schematic.
 

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?

found one for a few quid

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From: [email protected] [mailto:[email protected]] On Behalf Of Max Donoghue
Sent: 18 July 2022 17:37
To: Andrew Lenton
Cc: [email protected]
Subject: Re: [YaesuFT847] Check Pin 8 gets its supply either 5V 8v or 12V or raw 13.8

?

Pin 8 was showing about 4.1V

?

On Mon, Jul 18, 2022 at 12:34 PM Andrew Lenton <a@...> wrote:
Max Donoghue
 

I've got a couple on order now just in case it turns out to be the issue. Sure would have been nice if they were socketed.?

I'll check those other two test points tonight and report back.

Thank you again for the the help.

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