Cobra 19XS AM power ??

[Shadetree Mechanic]

I will tell you what I found out playing around with mic elements, the condenser element will put out strong audio all by itself, just like a power mic. And it will sound better than any power mic to boot. I can easily see how cost cutting on the mic preamp would make a better sounding system with less parts if a condenser element were used.

 

[Shadetree Mechanic]

This was my first rig back in like 83-85. I was like 13.

Was interested in getting one for nostalgia and possibly running with my KL203 amp

All I see online is cut 105 for modulation. That's not what I want.

But I would like to adjust the AM power down abit to be at the 2w or so mark for the 203 to play nice and not burn up.

Anyone have any info on this or a pic of the insides of one they may have in a junk pile?

Photo for reference.

View attachment 34969

That is a neat radio, I didn't even know they existed until you posted this. Its always fun to check out how different radios were done. Hope we aren't throwing your thread too far off track. Thanks for sharing!

 

[Handy Andy]

I will tell you what I found out playing around with mic elements, the condenser element will put out strong audio all by itself, just like a power mic. And it will sound better than any power mic to boot. I can easily see how cost cutting on the mic preamp would make a better sounding system with less parts if a condenser element were used.

Seems that Cobra 19 and 18 -even though they wanted to cut costs by reducing parts count.

You have to admit that it does help the radio when you compare the built-in pre-amps other radios of similar size - you seem to lose a little bit more in the translation from Audio to Signal in the Dynamic versus the Electret.

For something so simple - seems more ways than one...

 

[Robalo]

I got two to play with it , thank you for the info

 

[Robalo]

So you know, if you can't get a standard cartridge 600 ohm mic to work with this, think about measuring voltage at Pin 2 of the Mic - for Audio is sent in thru Pin1 - just can't find "return" for this setup...For Pin5 and Pin 2 short on TX if Plunger Diagram is correct

pin 2 of mike plug has 8.42 volts and regular realistic mike does not work, it tx 6 watts no modulation

 

[Handy Andy]

@Robalo - Hey! You are AWESOME...

Yeah, be careful with that. especially with Pin 2 - for it does have power thru it.

Hope you caught the Mic wiring section in one of the graphics I sent above - the Mic "cartridge"
(whatever that means)

Here's a Reminder from the Service Manual...

 

[sunbulls]

Sorry for the late post. All 19XS Korean made models use a 500 ohm dynamic cartridge not an electret condenser. I convert a lot of these DIN jack radios over to 4 pin jacks. Hope that explains some of the confusion. Unlike so many of the 19 series, the 19XS never produced a later version that was made outside of Korea.