DX 959 stability

[dime196604]

Is there any mod, or adjustments you can make to a Galaxy 959 to make it more stable on SSB? I know its not a stable radio and a lot of you will just say to get a better SSB radio But i was wondering if it is possible to stabilize these radios.

[TheCBDoctor]

Is there any mod, or adjustments you can make to a Galaxy 959 to make it more stable on SSB? I know its not a stable radio and a lot of you will just say to get a better SSB radio But i was wondering if it is possible to stabilize these radios.

Hi Dime,

You can build a crystal oven around the loop crystal. It consists of a resistor glued to the crystal. The consistent heat of the resistor stabilizes the crystal. The resistor value is determined by the supply voltage and just how warm you need it to be. You can be even more sophisticated by tying the resistor to the output frequency and regulating it using a 3 pin variable voltage regulator LM-317. The simple resistor oven info is free. I can help you decide what value to use. The regulated circuit info will cost some money.

I have to pay for my sponsorship for this forum somehow. I think the simple circuit is all you need. It is in the winter that the DX-959 has drifting problems. It is fairly stable in the summer heat.

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Respectfully,

[dime196604]

The regulated circuit info will cost some money.

I have to pay for my sponsorship for this forum somehow. I think the simple circuit is all you need. It is in the winter that the DX-959 has drifting problems. It is fairly stable in the summer heat.

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Respectfully,

That seems a little deeper then i wanna get into as i do not have much tech experience, if i was to pay for the regulated circuit, would that just be you telling me how to do it, or you building the circuit and mailing it to me?

[dime196604]

I have noticed that the drift is worse in the cold weather, but the other day when the heat index here was 107 the radio was in my car all day while i was at work and when i used it on my way home, it was very hot from sitting in the car and the Clarifier had a lot more range then normal

[Island_0860]

That LM-317 is a winner ...seen it used in everything and have yet to see one fail .

You say the loop Xtal ..but what about the Ref Osc needing one ?
Need to watch both oscillate I guess.. and find the culprit.

I agree on the Loop Xtal as that would be the my first place to look ..its higher in in freq than the Ref Osc.

[Clodhopper]

SSB drift on a Galaxy, is something i've learned to live with...It's the nature of the beast i suppose.....

[Cobra CHROME]

ive heard this but never had any issues with it. only when i first turn it on. so what i do is i wake up in the morning and turn the radio on but keep the volume down, give it about 5 minutes while i do whatever i need to do in the morning and its good to go. kinda like letting ur amp warm up before u use it.

it works great for me and i have no problems with it.

[MDYoungblood]

I have a Texas Ranger TR 696FD1(same PCB) and yes it drifts as much as 1kc when cold. I did an alignment when I got it , opened the clarifier so TX and RX tracks. I just watch the freq counter as it warms up until it stabilizes. If I had a radio that didn't have a counter I would be getting an "oven" from CB Doctor.

3's

Greg