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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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18th Sep 2023, 8:56 pm
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#1 |
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Heptode
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 624
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YAESU FT-290R AGC mod
Been going through an FT-290 in prep for selling on. Its had the common problem (of being ready for a re cap) causing the agc to be very slow to kick in, and hence the S meter not working properly. There is info on the internet which describes a resistor being placed on the base of a transistor. I've done the mod and confirm it works. Info and details of where to put the resistor attached in case its of use to anyone
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18th Sep 2023, 11:31 pm
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#2 |
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Nonode
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,227
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Re: YAESU FT-290R AGC mod
Thanks Steve, saved the info in case mine decides it needs it
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20th Sep 2023, 9:39 pm
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#3 |
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Hexode
Join Date: Oct 2013
Location: Peterborough, Cambridgeshire, UK.
Posts: 302
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Re: YAESU FT-290R AGC mod
Steve, can you give the resistor value please, my eyes are not what they were many moons ago, cheers, snowy
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20th Sep 2023, 10:02 pm
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#4 |
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Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 20,649
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Re: YAESU FT-290R AGC mod
1 Mohm according to the first and third pictures.
__________________
Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
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20th Sep 2023, 10:21 pm
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#5 |
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Hexode
Join Date: Oct 2013
Location: Peterborough, Cambridgeshire, UK.
Posts: 302
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Re: YAESU FT-290R AGC mod
Thanks Graham, as i said eyes getting old now
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