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Deaf FT101Z

 

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Thank you Emerson – your information much appreciated
?
Al
GM4ENF
?

From: emerson
Sent: Wednesday, October 20, 2021 6:52 PM
Subject: Re: FW: [Yaesu-FT-101] Deaf FT101Z
?
Hi
?
about 3sk53 you can try a bf998
?
Emerson
PP6EW
?
Em qua., 20 de out. de 2021 às 13:46, Roger VE7LB <Roger_VE7LB@...> escreveu:

?

?

From: Alistair via <alistairfyffe=[email protected]>
Sent: Wednesday, October 20, 2021 7:58 AM
To: mailto:Yaesu-FT-101%[email protected]
Subject: [Yaesu-FT-101] Deaf FT101Z

?

My bought from new 40 year old FT101Z has suddenly ‘gone deaf’.? It still works but received signal strength is now very low. S meter not showing anything on receive and attenuator apparently not working.? I have followed the guidance in the Maintenance Service Manual and my reasoning leads me to think the problem is in the RF board- either Q101 <3SK53-03) or Q102<J310>.? I have no analytical equipment except digital VOM and am waiting on board extenders so I can extract the RF board to check it out.? Another question is – what would be a modern equivalent for replacing the 3SK53?? Any advice gratefully received.? Alistair (Al)? GM4ENF.
 

other possibility
replace 3sk51 by BF964N

other 3sk40 by NTE 454 = 3sk70


73
Emerson



Em qui., 21 de out. de 2021 às 13:49, Alistair GM4ENF via <alistairfyffe=[email protected]> escreveu:

Thank you Emerson – your information much appreciated
?
Al
GM4ENF
?
From: emerson
Sent: Wednesday, October 20, 2021 6:52 PM
Subject: Re: FW: [Yaesu-FT-101] Deaf FT101Z
?
Hi
?
about 3sk53 you can try a bf998
?
Emerson
PP6EW
?
Em qua., 20 de out. de 2021 às 13:46, Roger VE7LB <Roger_VE7LB@...> escreveu:

?

?

From: Alistair via <alistairfyffe=[email protected]>
Sent: Wednesday, October 20, 2021 7:58 AM
To: mailto:Yaesu-FT-101%[email protected]
Subject: [Yaesu-FT-101] Deaf FT101Z

?

My bought from new 40 year old FT101Z has suddenly ‘gone deaf’.? It still works but received signal strength is now very low. S meter not showing anything on receive and attenuator apparently not working.? I have followed the guidance in the Maintenance Service Manual and my reasoning leads me to think the problem is in the RF board- either Q101 <3SK53-03) or Q102<J310>.? I have no analytical equipment except digital VOM and am waiting on board extenders so I can extract the RF board to check it out.? Another question is – what would be a modern equivalent for replacing the 3SK53?? Any advice gratefully received.? Alistair (Al)? GM4ENF.

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