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I working on a Kenwood ts 570s. Would anyone know where to get a service manual for this radio. I found manuals for ts-570 but wrong radio,plus ts-570d, again wrong radio. I can only get operating manual. Thank you. Ron

I saw the relay on rf parts, have to order it. thank you. I getting 4.80kohms across the coil off the relay. there was a .05 z5u cap. on the relay, second pin down, hook to ground. it was burnt in half. don't know what did that?? Maybe to much input watts?? I'll keep you informed when I get the...

I found the 980 volts with the switch on stand by. Hook the radio up and keyed it , the other set of relays keyed but the middle set did not key. the 980 volts was not on the tubes. so that relay must be bad. potter & brumfield ka-14dy relay. haven't been able to find it so far. still looking...

Thank you for all your help. I have the amp turning on with no problems. But there is no high voltage to the tubes, nothing,. I got to checking around and noticed that the standby -on high voltage switch is hooked to a bnc jack in the back input. does this amp have a separate power supply for...

i was given this amp. there is a capacitor blown. Is there a schematic for this amp. It is not the triple stage amp. Must be older than that one. could be that the caps. were wired wrong on one side. the side that the one is gone. It looks like that was right. the positive comes from the end of...

Yes, thank you , I found it after looking further. He had it wired wrong for 110 volts. had to rewire it to get it to light the tubes and the meter light. then put a foot pedal switch on it to key it for transmit. Because it was keyed through the radio circuit. His radio did not have the...

thanks, I have this same one, It does not show a choke to ground as far as I can see on the relay. unless I'm missing it somewhere. ron

Does anyone know the wiring of a swan 1500z relay? I got it at a hamfest, there is a 10uh choke going from ground to the relay,but is not hooked up to it,doesn't look like it was ever hooked to any pin on the relay, just hanging there. Does anyone know what pin it would hook to? trying to get...

HEY!!!! I finally got the schematic drawing from xforce for the relays. Had 4 wires reversed from old relays. That's probably why he kept blowing the finals. Whoever wired it before had them wired wrong. Thank you for all the help. Ron

I'm sorry, I should have known that. It's been 16 years since I've worked on these. Where the chokes hook to on the old relays was the front pin. thats where the cap was. hooked to a wire that went to the pot that controlled the wattage on the front of the amp. hooked them up the same way and...

dc, Its a base amp. has a ac plug in wall but conversion to dc inside amp. I ask xforce and he said he would send me diagram for hook up when I bought the relays from them, but he didn't, been trying to call them but they won't answer the phone. he said I had it wired for nc (normally closed)...

Does anyone know the wiring diagram for a xforce 80 amp? purchased new relays for the amp and made diagram from old relays that were in there.Wired the new relays up the same way and they don't work. So whatever relays that were there were different than the ones I purchased from xforce. I would...

Thanks, tried this, did not work. I didn't even plug it in, put it in line to dummy load, set the swr meter, keyed the little radio I've been using and it pegged the meter. there is something going on with this amp for sure. checked for voltage reading at a 12 volt reg. diode and got -5.5 volts...

I told the person the same thing,but he said when he takes it out of line the swr's go back to normal.. I got it back to make sure it was in tune to peak as good as I could get it with the adjustments inside the amp. It could be a little out of harmonic and cause distortion. All I can do is...

don't know of any driver. this is two transistors, sd1407 finials.there is a transistor,nte152 that is heat sinked real good. this is an audio transistor. don't know if its a driver. Is this what you are talking about? Ron

I'm getting the klv 550 amp back today. the person say's the amp works fine but when he tries to set the SWR'S he says everything goes haywire. the swr meter goes all over the place and cannot be set.Gets about a 7 to full scale reading. I have to figure out why this is happening. the relays...

I think I agree. this is the second one I got in for repair. First was a x80 with 2 2290 finals gone, then this one right after with all 2879 finals gone. For a high drive it didn't take much to blow all these parts. Ron

the one's in there are toshiba, but right dei are much cheaper and work just as good, thanks, ron

Thanks, I thought they were 100 ohms and 10 ohms for the smaller ones. I'm going to replace all the finals also. the ones in there are toshiba but i'm putting dei finals,or the cheapest I can find. Maybe look up mrf's or ecg's. forget about nte's,out off site.

Is there a schmatic for this amp, xforce 60012hd. I have it here for repair and ther are about 6 burnt resistors in the circuit that are burnt so bad I can't get a reading. I can take an educated guess as to what they are. but not sure of the value. 3 are 2watt 100ohms. I think. then there are...