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Did I miss something or did he not say this was an intermittent issue. So if I'm right then all those steps Ray listed are valid but only when the unit is in a none working intermittent state. So it's all valid except (Intermittent loss of output power) Soooooo! you first need to be able to...
I will say I had one of these back in around 1979 on a 60' tower up on a ridge and it was a force for sure as I was running an old Footlocker about 600 watts. I could talk to stations in NY about 120 miles due north of my location. Worked really well for about a year till we had a freak wind storm.
Well, then you have a radio problem! can't tell you what it is as it could be many things that are causing it. You are sure the antenna is still functioning as it should?
Try this adjustment set the swr while fully modulating SSB whistle while calibrating the SWR meter then switch to test the SWR's while talking with MFJ . The radios internal swr meter is auto calibrating so it compensates for the difference in power from AM to SSB.
OK I went back I see that you said there was no SSB power so if you see frequency Flash with the frequency counter at the antenna there must be something a slight bit of power if you have another radio you can listen to while transmitting on the Washington that might help decide what's...
I must confess I sometimes post without that little voice in the back of my head that keeps telling me don't assume that voltage testing is part of the routine don't ever assume that frequency testing with either a scope or frequency counter is part of the routine, so for the record, the first...
You say it tests fine but do you see the frequencies being
Actually, I did ask if the SSB Power was working but I don't know if he ever responded to that question?
Well, let's see you could start at the pre-driver and make sure you have 27megs being delivered to the base of the pre-driver transistor. If not then you should check the transmit mixer stage and make sure your oscillator frequencies are present if they are but you have no 27 megs at the FET...
Well, I'm down to 6 units but it's because I just quit excepting new shipments. I will be building a new bench once these units are finished. Building a 6 pill for one cust. Rebuilding a 4 pill for another and finishing up a restore on a Pres. Madison. A CX3300HP and a CX3400HP Oh forgot...
Well, the best I can remember L39 is the choke thru which the collector current for the final is fed. So if the Final shorted from collector to emitter it's plausible that could get the choke pretty warm but a proper fuse in the radio should have prevented that, "I think" but maybe not it is...
Do you have schematics and alignment info?
No disrespect intended but what is your level of understanding of how this radio or any radio works?
And then we can figure out what we need to do to guide through the process.
not every part of in radio will necessarily have a voltage or signal that...
I may actually have these assembly instructions in my storage unit I will try to get out there and see I know I did have them at one time but that was 40+ years ago.
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