texas star 400

[sitting duck 616]

at the truck stop guy offered me this amp
What is the max power on 4 sc2290 qnd should i upgrade it to the the bigger pills..
Your input ..

 

[Robb]

First off, it isn't a straight swap between the two devices. There are some caps that would need to be changed out and some other tweaks needed to make such a swap work.

Second, the difference in power output is not worth the trouble . . .

 

[wavrider]

http://www.classiccmp.org/rtellason/transdata/2sc2290.pdf

Spec sheet on 2sc2290 showing it is a 60 watt transistor.

As ROBB mentioned it is not worth the price to install different transistors.

 

[Crusher]

The cost of 4 2879's, plus new output transformers. You're looking at $200 to upgrade and that doesn't include caps. Save your money and buy a 500. Otherwise be happy with the 400. Wattage wise, no one will know the difference.

 

[sitting duck 616]

So to say 240w is what i should get out of it...now does it need to be converted to 11 m or just match the radio and amp and go..?

 

[AudioShockwav]

Run it as is.
AM mode.
Turn the radio down until the amp is dead keying approx 70/80 watts.
Do not exceed 20 watts peak input and put a fan on it.
SSB do not exceed 20 watts peak input and put a fan on it.
If you want to change anything put some dam grommets on the power leads, by-pass the shitty fuse set up, fuse the power leads at the battery, and put a fan on it.
Oh, and put a fan on it.

73
Jeff

 

[sitting duck 616]

Ok took it to the shop put new 4 gauge wire to it and test it but it wont unkey ??? Any suggestions to what may be wrong...

 

[Robb]

You mean, besides not having a fan on it?

Sounds like RF feedback . . .

 

[543_Dallas]

Whats up with the big ceramic resistors on the feedback circuits? Has Texas Star started using these or did the guy that added the coax do it because he couldn't figure out why the stock pieces were getting hot? I can't see them being factory due to the higher cost and because they are inductive...if the thing is working right 2 watt resistors are more than enough.

 

[sitting duck 616]

Robb i will add the fan...now everything seems in line but i will check with another shop as i m on the road and a cb shop is the best i have to look at it...

 

[sitting duck 616]

All fixed ....

 

[mb91w126]

where's the fan??

 

[sitting duck 616]

Don't need one as i got a fridge in my truck

 

[sitting duck 616]

J/k slow down i m working on that next...

 

[Dipole]

splatterbox!