Information about power output ft101e

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Information about power output ft101e

Postby VE2PBC » Mon Sep 17, 2018 12:01 am

Hello, I have a good old Yaesu ft101e and I notice
That when I tune the final amplifier, the wattmeter gives me about 150 watts on all the bands except one less for the 10 meter and 15 meter, but when I use the microphone (original Yaesu microphone) to transmit I get 100 watts on all my bands and a little less for 10 meters and 15 meters. The gain of the microphone is 3 1/2 to stay in the green zone of the ALC.
Why there is a difference in power output at the tune (10 sec Max) and the use of the microphone in normal transmission?
In general the ft101e can give a power of 130 watts Max on all bands and a little less than 10 meters.
Thanks in advance
Louis Philippe
VE2PBC
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Re: Information about power output ft101e

Postby N8YX » Mon Sep 17, 2018 5:42 pm

Are you using a peak-reading or average power wattmeter?
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Re: Information about power output ft101e

Postby VE2PBC » Mon Sep 17, 2018 7:56 pm

I use Peak-reading wattmeter for my test (MFJ-948) Louis
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Re: Information about power output ft101e

Postby N8YX » Tue Sep 18, 2018 3:32 pm

Is there an ALC threshold adjustment in the TX chain of that rig?

I'd be happy with 100w everywhere. FWIW, I have an FL-101 (same transmitter circuitry, including the final tubes) and it'll deliver 110w PEP on all bands with fresh tubes and a proper state of inter-stage tune. Any more than that and you'll overdrive the typical 100w-exciter-class amplifier. And...the op at the other end isn't going to notice 20 extra watts.
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Re: Information about power output ft101e

Postby VE2PBC » Tue Sep 18, 2018 8:03 pm

thank you for these precision. I checked my ALC adjustment in TX and I get from peak to 110 watts, so my FT101E gives a normal power for old tubes of 25 years. thanks again. Louis Philippe VE2PBC 73
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