so the radio has always had problems but low rx and audio level were my biggest concern. the pll board is a problem as is cold solder joints and un known modifications to control board!
Пікірлер: 27
@mixradiointernationalshortwave8 ай бұрын
The one I have I keep working with many Hi Fi mods including a SDR interface. It is a fantastic radio. I have repaired many 940s. I have another one that is doing something similar to yours that I have not got around to fixing. You may need to recheck your the soldering to make sure no bridges occurred. Check the black sticky pads as I have removed them because they can cause conductivity across the board. The glue can can damage the lands as well. It sounds like you were close to getting it working. The FET transistor that has the drain and source reversed will only add a little more receive gain to a working 940. It will not cause of low receive.
@hamradiohack8 ай бұрын
I got it fixed. Its never sounded this good on rx. Wow. The pll i had to check carefully and reflow around the 3 vco that werent locked. Then i found a streched wire at a header pin that was the rx issue. Its been 2 years I've had this and its never worked this well. Lots of soldering, lots
@mixradiointernationalshortwave8 ай бұрын
Fantastic. To prevent power supply damage. The transistor on the heatsink to the voltage regulator board needs to be soldered directly to the wires on both sides with no connectors. Over time the connection is lost due to heat. If you do this mod be very careful making sure that the wires are correct otherwise it will blow transistors.
@hamradiohack8 ай бұрын
@mixradiointernational2294 the fans are in series and always on so that keeps a load on the 24v supply. Im not familiar with what you're talking about but Im aware that theres issues. I honestly dont want to deal with any more 940s
@mixradiointernationalshortwave8 ай бұрын
I leve mine on 24/7 With replacement computer fans. I will work on a 940 over the newer SMD stuff. @@hamradiohack
@624radicalham2 ай бұрын
@@hamradiohack Can you tell us here where this "stretched wire at a header pin" is? On what board. What connector? This is really gonna help people if you share information. Of course you remember which stretched wire it was. Help some brothers out man
@Littlelewie1514 ай бұрын
Dont give up. Seems like urs is in better shape than mine. If you get a hold of me i could walk you through fixing the pll. All you need is a volt meter and a set of alignment screwdrivers.
@tomsworkshop58568 ай бұрын
The battery you replaced. That almost looks like a 1.25v NiCad. If it is, 1 volt ain't that bad. Also, sometimes PLL systems won't work right if they're free-floating away from the chassis (As that acts as ground, shield, etc.)
@wolfhawg8 ай бұрын
No matter what happens you learned something. Happens to me all the time. 73s
@richardhoffman87218 ай бұрын
Don't feel bad, I got two ten-tec's that I have to dig into.
@hamradiohack8 ай бұрын
I have a corsair ii that drifts lol
@BatGS8 ай бұрын
Greetings: Radios and guys such ss this made me a lot of $ when I had my shop. No disrespect. Kind of the dame as many mechanic shops 2day. Most R not self skilled or knowledgeable. They rely on flow charts and Ujunk. Us old troubleshooters, engineers and techs may not B of the future but ee sure could knock out some stuff in the past. Thx 4 the share.
@hamradiohack8 ай бұрын
Im not cut out for fixing radios. I did go to college and study electronics and television repair. Wasnt my thing.
@hamradiohack8 ай бұрын
Fyi i got it fixed finally tonight. And the rx is amazing but this is silly. I have many hours into it. But its finally working how it should
@stevepatterson22908 ай бұрын
some things are meant to be for parts
@hamradiohack8 ай бұрын
Fixed
@leftover19558 ай бұрын
i got two of those ts940s that do the same thing every now then can't figure it out either
@hamradiohack8 ай бұрын
Soldering im sure. I found issues in the control board to be the worst.
@GarthWheeler8 ай бұрын
Check the vco
@hamradiohack8 ай бұрын
3 werent locked. Soldered the board in those areas and got it all fixed up about a hour ago. Its working great.
@GarthWheeler8 ай бұрын
very good@@hamradiohack
@Darryl_Frost8 ай бұрын
You want to get yourself some test equipment, a circuit diagram and do actual fault finding. better than a scatter shot method.
@hamradiohack8 ай бұрын
Its fixed. I tested the pll board and the 3 vcos were out of lock. Then i found a problem on the control board that resolved the rx issues
@Darryl_Frost8 ай бұрын
@@hamradiohack excellent, they are a good rig, and I love your shack. you are very well geared.
@hamradiohack8 ай бұрын
@Darryl_Frost i try to get the good stuff. Arizona is or was good for deals on radios and stuff because there's alot of older people who move here.
@Darryl_Frost8 ай бұрын
@@hamradiohack great, I love all the oldschool gear as well, I used to dream about owning a TS 940, the best I had was the TS 120 in the 80's. Aussie ham here, VK1DRL. Cheers..