[Yaesu] FT-990 no Xmitt on 15 &17meters

[Vince]

Hello Garth:
I hope that you have already found a solution.
If the FT990 is built like a FT1kD, then the LPF is at the top of the chassis and centrally located. Look for small coaxial cable for Rx antenna connection.  Within this canned module are a slew of relays that are used for switching in/out LPF for the selected bands.  I think that 15m and 17m use a common band pass section.  Trace the connector plug voltages to determine which filter select relays
are keyed together.
Good Luck,
73s and Have Fun,
de ~ Vince ~
WA2RSX   IOTA  NA-026


Garth wrote:

> My Ft-990 has devolved a problem. It will not transmit on 15 or 17 meters. Receive is fine. Also, other bands are all OK. I spoke with Yeasu tech support and they mentioned the 'LPF" assembly but stated that this was beyond the scope of telephone support. I guess this is the Low Pass Filter assembly? Anyone have any experience with this? Can someone tell me where the LPF is located in the unit.
>
> Thanks
> Garth, KW4MM