[Yaesu] FT-1000 internal speaker stops working and constant tone in receiver audio

[Dick Zseltvay]

I am looking to the Forum to help me solve two problems that I have with my FT-1000. The two problems that I am having with my FT-1000 may not be directly related, but I have to wonder if they might have a common cause. For months I have tried to get on the air with PSK and also set-up CAT control of my FT-1000. I got both working a few weeks ago. After only a few days of having PSK work my transceiver began to fail. I wonder if errors in cable connections caused the failure.

My radio configuration consists of a FT-1000, a SignaLink SL-1+ sound card interface, a LCU3-Y3 C.A.T. Interface Cable, and a Dell computer with Sound Blaster Live 24 bit sound card. I worked with getting PSK working first. After months between brief attempts to get the digital mode operational I finally got PSK to work. Immediately after I got started with PSK I got CAT control operational. Most of the time that I worked with PSK,  I tried to use the "external speaker jack" on the rear of the FT-1000 and I connected it with the "microphone input" jack on the sound card. My first indication that I had a problem with the radio began by me hearing a chattering sound (relay?) coming from the rear of the radio sometimes when I switched the radio on. If I switched the radio off and then on again most of the time the chattering sound would disappear. After just a few days of PSK and CAT becoming operational I quit using the radio entirely due to a recurring illness and series of hospital admissions. Sometime during the above I quit using the rear panel "external speaker" jack and noticed that the radio's internal speaker no longer worked. Last night I tried to use the radio for PSK and I noticed a second problem. I suddenly had the sound of a loud, constant tone, coming through the ear phones.

The tone does not change in volume or frequency with manipulation of the radio's controls. I can hear a normal signal in the background. The radio has not been used recently. Sometime during the recent time that the radio was not being used the PSK gear was disconnected. The tone developed while I was trying to reconnect the PSK system. At the present time the CAT control system continues to work correctly using MixW and Ham Radio Deluxe software. PSK is not working. 

I don't have any idea what caused the appearance of the tone. Concerning the failure of the radio's internal speaker to work: I wonder if I exceeded the current rating of the relay connected to the external speaker jack and caused the relay (if there is one) to not switch the internal speaker back on when there is no connection going to the external speaker jack. I don't know why the connection between the external speaker jack and the microphone input jack on the sound card would pull that much current. The chattering sound that I began to hear seams to be coming from the area of the external speaker jack. That is what is making me think that a damaged relay might be associated with me failing to hear audio from the internal speaker.

Any help is much appreciated. I am not able to spend money on sending the radio in for repairs.

Dick, KC4COP