959 high dead key issue

[Jbvo92]

No i only have the one on the radio. Seems to work properly on ssb. The worst part is thag i have no idea how long its been doing this because i never put the meter on power. I always have the switch on swr or modulation

 

[nomadradio]

That radio has a knob on the front that controls the AM carrier power.

Does turning this knob down have any effect? If it doesn't, this is a diagnostic result by itself, without opening the case.

73

 

[Jbvo92]

Ya i can turn it from 0-9 or 10ish and anywhere in between

 

[nomadradio]

So, why not just turn it down?

73

 

[Jbvo92]

Because if its an issue id like to solve it. If its normal then great but i didnt think it was. Maybe i have some kinda hotrod radio that instead of 4w is putting out 3 times that lol. That would be cool.

 

[Tallman]

I checked out the schematic and im going to start by checking for 8v where it says it should have 8v and then depending on what i find should i go ahead and do the alignment procedure? Or should i leave it to a shop for that? I do have a multimeter and an o scope

Do not adjust any frequency components unless you have a known, calibrated frequency counter.

 

[Jbvo92]

My oscope can measure freq

 

[Robb]

My oscope can measure freq

What kind/model of scope is it?

 

[sonoma]

from what I am reading you are looking at the meter on the radio to claim it is doing 8 watts on high. that is not the way you want to check for the out put of the radio. you need a good external meter to show you what the radio is putting out. I have not seen very many meters on the radio being true to what the radio is putting out. there is a VR inside the radio to adjust the meter on the radio and it could be off. you could be about to open a can of worms that is not needed. you say you have a freq counter on your scope and Robb asked what scope you have. it may not be the best way to check the freq either.
just my 2 cents worth.

 

[Jbvo92]

Ya that makes sense. The meter could be off. The scope i have is a snapon one for automotive

 

[Jbvo92]

Ittl measure freq. Amplitude. Wave length. Wat ever you want. It ca. Also be used as a multimeter if u want

 

[Robb]

Ya that makes sense. The meter could be off. The scope i have is a snapon one for automotive

Unless its rated for 30mhz; it won't work . . .

 

[nomadradio]

Frequency displays come in all varieties. Not sure what the upper-frequency limit would be for a 'scope built for automotive work. Last one of those I fixed for a friend had tubes in it, about 35 years ago. A modern-day automotive 'scope is bound to be set up radically different.

73

 

[Tallman]

My oscope can measure freq

It will not be precise enough for frequency measurement. When was it last calibrated?

 

[nomadradio]

Used to have a 'scope with a bonafide counter built into it. Was years ago, can't even remember the name that was on it.

Yes, using the 'scope's screen to measure frequency does not provide the accuracy needed for the radio's internal adjustments. But since I have no idea what his 'scope is like, maybe it has that separate feature? Plenty of Tek 'scopes out there with a DVM in them.

Dunno.

73