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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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28th Sep 2019, 5:00 pm | #1 |
Retired Dormant Member
Join Date: Mar 2017
Location: Airdrie, North Lanarkshire, Scotland, UK.
Posts: 6
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Yaesu FT101Z motorboating sound
When I switch on my Yaesu FT101Z, on main bands ie 20m, 40m or 80m etc. on receive I get a sound like motorboating which seems to be tunable, any ideas what the problem could be?
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29th Sep 2019, 5:05 am | #2 |
Banned
Join Date: Feb 2018
Location: Horncastle, Lincolnshire, UK.
Posts: 203
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Re: Yaesu FT101Z motorboating sound
if it was me the first thing i would check is all the psu voltages against the schematic,then caps for high esr.
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29th Sep 2019, 12:28 pm | #3 |
Pentode
Join Date: Jun 2009
Location: Braintree, Essex, UK.
Posts: 170
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Re: Yaesu FT101Z motorboating sound
Fist thing to do is plug in a dummy load then see if the noise is still present.
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29th Sep 2019, 8:07 pm | #4 |
Retired Dormant Member
Join Date: Mar 2017
Location: Airdrie, North Lanarkshire, Scotland, UK.
Posts: 6
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Re: Yaesu FT101Z motorboating sound
Hi, Checked out with Dummy load connected, Same symptoms. Thanks Richard. I'll now start checking out the voltages and capacitors it sounds like an electrolytic has gone o/c. need to source voltage values and some capacitors. Thank you M3VUV51
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29th Sep 2019, 8:45 pm | #5 |
Pentode
Join Date: Jun 2009
Location: Braintree, Essex, UK.
Posts: 170
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Re: Yaesu FT101Z motorboating sound
The old 101Z is prone to dodgy switches due to aging. I would give all of them a good working over before anything else especially the push button switch bank under the vfo
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