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elite tx2250

096

Member
May 31, 2009
3
0
11
quebec canada
Hi I`am new and was wondering if anyone could help me.I need to find a schematic for my old amp. its a elite line tx2250,its been modified someone put in 2 2sc2879 instead of the original 2cs2290 worked great for 4 years,but now its dead.checked the finals tested good,but some resistors burnt don`t know the values.Any help would be appreciated!
 

Qosmio

Member
Aug 17, 2020
9
9
13
52
maybe this can help
 

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nomadradio

Analog Retentive
Apr 3, 2005
5,207
7,395
573
Louisville, KY
www.nomadradio.com
First question I ask is if you can transmit through it turned off. I call this the "barrel connector" test. If you can't transmit and receive through it with the power turned off, that's one kind of problem.

Do you hear the relay go "click" when you key the mike?

An amplifier that won't activate the relay when you transmit has a different problem.

A burned resistor that's connected to ground on one side, and to the transistor's input lead on the other tells you THAT transistor has broken down and shorted inside.

Permanently.

Just because the transistor looks good doesn't mean it works. I have a box of blown-out RF transistors that all look perfectly okay. Makes me wonder how much gold you can recover from a hundred of those. Would probably cost twice what the recovered metal is worth.

If you unsoldered the base and collector leads of each transistor and then connected a transistor tester to each one, you could say if either or both is good.

Short of that, you're just guessing.

Or hoping. Or both.

73
 

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