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FT-101 only transmits on 40m

 

Hi,
I got this FT-101 about 2 years ago. I went through some checks to make sure tubes were neutralized and no obvious burned parts. Still has original tubes
It seems to transmit and receive quite fine on 40m. I only had 40m dipole so didn't bother to transmit on other bands.
This year, I got an old tuner, so put up a simple long-wire antenna.?
Again, 40m seems to be fine, I was able to get QSOs on CW and SSB.

But I realized there is no output power on other bands. IC goes up and down as per the "carrier" knob. But on PO meter setting nothing comes out. Nor can I see it on my power/SWR meter. (again 40m it seems to work as it should).

I am a bit stumped. What would you suggest I look at first?
 

Take a look at the Heterodyne crystal board visible on the top chassis near the right front of the radio. Are all the crystals there?

FT-101E_EE_EX Heterodyne Crystal Oacillator.jpg

 

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Try going through the Rx & Tx alignment procedure.
It might be that the trimmer capacitors need to be touched up correctly to provide drive to the finals.

73 de
Claude - VE2YI

From: Yaesu-FT-101@groups.io <Yaesu-FT-101@groups.io> on behalf of Pil Joo via groups.io <pilobond@...>
Sent: Monday, May 27, 2024 14:44
To: Yaesu-FT-101@groups.io <Yaesu-FT-101@groups.io>
Subject: [Yaesu-FT-101] FT-101 only transmits on 40m
?
Hi,
I got this FT-101 about 2 years ago. I went through some checks to make sure tubes were neutralized and no obvious burned parts. Still has original tubes
It seems to transmit and receive quite fine on 40m. I only had 40m dipole so didn't bother to transmit on other bands.
This year, I got an old tuner, so put up a simple long-wire antenna.?
Again, 40m seems to be fine, I was able to get QSOs on CW and SSB.

But I realized there is no output power on other bands. IC goes up and down as per the "carrier" knob. But on PO meter setting nothing comes out. Nor can I see it on my power/SWR meter. (again 40m it seems to work as it should).

I am a bit stumped. What would you suggest I look at first?

 

Looks like they are all there. Didn't pull it out to examine.
I am receiving ok on other bands actually. I noticed they are a bit quieter than on 40m but I can receive enough.

2024-05-27 16.57.39.jpg

 

Will look into it but is there a separate alignment for each band??
I can receive ok to some degrees in these bands where I have no output power.
Will browse through the service manual soon.
VA3GPJ

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