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I agree. I think in the end I may find that was the source of my all my issues with this radio. We will see.... Once I get it in and installed I will be back on to update you! If anyone has any other things to check in the meantime, let me know... Thanks for all the help.

Yeah, nomad had a link for it on Ebay. Looked right but we will see. I just didn't want to mess with the current one. Are you agreeing it is a good bet the switch is bad? I just don't see any other reason orange wire is not providing the 13 volts to the test points since it originates at the...

I do think the switch is bad and at the end of the day, that will be proven the source of most of the problems. I did order a new one (per Nomad's post) from ebay but it is coming from China (boo!) and won't be here for weeks. I think that will be next test unless there is another reason why the...

There is normal (13.8) volts at both pin 1 of IC chip and the "input" side of R193. The red wire coming off the other side of R193 that goes to the mode switch is also showing 13.8 which as I understand it, is to high? Not 100% sure about the rest of your note in red though. . Again I see the...

Voltage at tr42 emitter/41 base is 6.4 volts. Voltage at tr42 base is 6.8 volts. However! Both are variable as you adjust VR10. Incan adjust them by turning vr10 to get basically zero volts there to well over 8. Should those be adjustable in that manner? First question, what’s the “power...

Voltage at tr42 emitter/41 base is 6.4 volts. Voltage at tr42 base is 6.8 volts. However! Both are variable as you adjust VR10. Incan adjust them by turning vr10 to get basically zero volts there to well over 8. Should those be adjustable in that manner? f I lift the base pin of tr41 off...

Yes no power at orange wire in or off the pin. And I did check and replace tr41 and 42 because I thought same thing. I don’t think they are bad unless I zapped new ones but I don’t think so. But Getting 13 volts at the emitter and collector of 41 in all modes.like you said should be 6.8 volts...

Then that does lead me to believe the switch might be bad because the 13 volts is not getting to the orange wire.

Crazy. There’s 13 volts at the red wire. That sound right? Schematic shows the 13 volts with R193 in between but also 6.8v off tr41.

God what a disaster. Thanks I’ll check it out.

Does the red wire on the mode switch send power to the switch or from it to the AM voltage regulator. TR41? As I mentioned, I am getting 13 volts in am and SSB at the outer leg of TR41 where the red wire connects. I believe that means the voltage is going to the mode switch. But I don’t think...

Yea sorry. There’s no voltage at the pin or the wire when unsoldered. In any mode.

. like to know why I’m getting 13 volts at both the center and front leg of the AM regulator in all modes and zero volts at the rear leg (that is the leg towards the back of the radio with it flipped over on solderside. That’s part of why I was asking about C174/175.

Radio has so many issues. Getting close to just taking up to the top floor of my house and dropping down to the patio below. If I hadn’t put so much blood sweat and tears into it I would have already.

like to know why I’m getting 13 volts at both the center and front leg of the AM regulator in all modes and zero volts at the rear leg (that is the leg towards the back of the radio with it flipped over on solder side. That’s part of why I was asking about C174/175.

Agree and I wish I knew. This has become a disaster quite frankly.

I did the search a few ways couldn’t find. Could you either drop the eBay link or the thread link on here? Thanks.

non related question I think. In the schematic, there is 6.8 volts coming off pin 9 of IC 6 into C175. I get that 6.8 at the plus side of C175 as expected. What should the voltage be on the negative side of 175? Still 6.8 or lower? Getting about 1.7. Reason I ask is because I am getting zero...

There is 13.8 at the red in both AM and SSB. There is no power at orange in any mode. And the the 2 legs of the voltage regulator (the middle and the one towards the front of the radio are both showing 13.8 in all modes . The rear leg is showing zero in all modes. That doesn't seem right at all...

all correct.