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Bumping the thread up: I have the latest flrig/fldigi/hamlib sources on this system (which I'm using to post) and have successfully compiled all three programs. I've also written and tested flrig

I believe they are the R16 and R18 shown in the parts list as metallic film, 1W, 1.5 ohm.? They are right next to transformer T02.? They appear to run in parallel to C27 and C29 caps. 73 Bob N9IB

L05 it is not missing. Just changed place :) L05 feeds Q01. In the schematic takes from 13.5V line. That means Q01 has collector voltage all the time. The ?factory? mod changes L05 to feed from

Hi EA1FC, I replaced the C20 which had blown and the C18 like you did.? I got some 10uF, 16V tantalum caps from Mauser Electronics.? They are yellow and about the same size as the originals.? I

I thought I had uploaded the 10uF capacitor. I placed a plastic screw in Q01 This capacitor is specially prone to fail. 4 that I know up to now. There are many more in the radio, bur this one besides

Has anyone in the group ever had a problem with the detector diodes in the Fwd/Ref Power circuit (CM Coupler) failing? Seems that the SWR functions on two of my '980s are inoperative, though the Fwd

I was just re-reading this thread and noticed your comment about the missing screw in Q01.? Mine had a plastic machine screw in the hole but no nut was on the screw. I took the screw out before

Hi Robert, This defect is very common and well known for the FT-980. I have also had this problem as have many other owners. They are indeed tantalum capacitors marked (T). They have the defect of

I finally got this radio working after re-reading the manual and adjusting several settings.? It worked for one day and blew a capacitor in the PA unit.? The capacitor is brown and the schematic

Finally my FT-980 is more or less OK, the only strange thing is temporal. LSB beat is wavering, I guess the PLL is not locked, manual tells to wait 5 minutes before adjustment and in my case is around

After I commented with a friend about the tantalum problem in PA predriver, he look at a FT-107 bought in a lot (interested in the tuner FC-107) he look in the PA and found predriver tantalum blasted

Tested with 200V wired for 234. I have small changes of voltage, I tried with 195V but sometimes mains voltage lowered and I was told that the signal worsened. So I leave for 200VAC in reception. The

I tested with a 500VA Variac that drops about 3V when transmitting. 185V in receive, the FT-980 24V show voltage right in the middle of area, but fluctuates a bit inside range when transmitting FM

Super topic. I think the PS is not well designed. Specially too much voltage in AC area. So I will try other approach. To reduce the heat, because the PS is always hot, and worse cooled than the PA

I read the service manual, I say I look at the schematics, and found the trimmer. As I said i have no idea about PLL but inside the can there is a transistor with a thermistor in the emisor in

To N9IB Your problem it is hidden in my former title, and maybe other members will not find it, maybe you should open other thread. I have opened a new thread regarding malfunction in the first 10

I initially said it only received in 80 and20 meters.? It does in fact receive on other bands but only for very strong signals.? It's like the RF gain was turned down but it's not.? The S-meter

My FT-980 is series 04. So I guess all service notes needed in early versions were done. After fixing the PA, next day I found that LSB reception was... strange, like added AC, tremolo when listening

I have added some photos related to the text. Photos have a short name 73 EA1FC

radio_ozu <javier_ebay@...> added the album radio_ozu ( /g/Yaesu-FT-980/album?id=281031 ) : Some photos from the text discused. Most with explanations