Texas Star DX 500 Preamp Problem.

[Eastside]

I have a Texas Star DX500 and the preamp works, but when you turn it on it takes you off frequency...is there a adjustment to align it with my radio?

Thanks...Es

 

[ExitThirteen]

When you turn it on, do you just get static, with no voice audio present?


Let me know if this is the case.


~Cheers~

 

[Carl]

that's what im thinking as well. its just a transistor you have to replace. if you turn it on and its bad you lose the receive. it cannot make you change frequency.

i did one in my dx350 this spring. get them from ebay for a few bucks

 

[Eastside]

When you turn it on, do you just get static, with no voice audio present?


Let me know if this is the case.


~Cheers~

When I push the receive preamp button the signal meter drops to almost nothing and you can barely here the guy talking....turn the preamp button off and the radios rx goes back to normal.....does not affect the amp part.

 

[ExitThirteen]

The transistor that amplifies the signal in the preamp is bad. The transistor is a 2N2907(A). Replace it, and the preamp will work as normal. It's a common problem with the Texas Star amps. You can get the transistor at the local Radio Scrap store if you have one near you. Good luck!



~Cheers~

 

[Eastside]

The transistor that amplifies the signal in the preamp is bad. The transistor is a 2N2907(A). Replace it, and the preamp will work as normal. It's a common problem with the Texas Star amps. You can get the transistor at the local Radio Scrap store if you have one near you. Good luck!



~Cheers~

What about D2 ?

 

[ExitThirteen]

No need to replace D2, just the transistor. Should be good to go!


~Cheers~

 

[Eastside]

No need to replace D2, just the transistor. Should be good to go!


~Cheers~

Cool...thanks...appreciate the help.

 

[Eastside]

Ordered the part off ebay.

 

[Carl]

you should receive 2 of them. bending the legs is the hardest part. its pretty straight forward how to replace them. just take a picture so you get the transistor right.

 

[Eastside]

you should receive 2 of them. bending the legs is the hardest part. its pretty straight forward how to replace them. just take a picture so you get the transistor right.

That is a good idea...thanks

 

[TonyV225]

Yup its common with the Texas star and other amps Ive also had to repalce a keying transistor one time and you wanna see funky symptoms that was weird when it happened.

 

[Eastside]

you should receive 2 of them. bending the legs is the hardest part. its pretty straight forward how to replace them. just take a picture so you get the transistor right.

I replaced the tranny and the diode and it is still not working?