Texas Star Modulator -no transmit

Unit 75 · Feb 9, 2020

Picked up one of these modulators. The relay works when I key the radio into it but I get absolutely no power output. I have tried 2 to 4 watts input drive to the amp The receive pre-amp button works and amplifies the receive, so the transistor is ok. ..just no power out. The variable pot on the front checks out ok. Is this a common problem with this model? Bad cap or something?

ENC Pirate · Feb 9, 2020

Not sure what model you have, I have a few dif ones. I do know most are input voltage critical. Just a bit low and it wont launch the finals. More info would be helpful. On another note I heard you blasting to the east coast yesterday

One last thing, if unit is off does signal pass through it? 73's
Ocean One Cape Hatteras

Unit 75 · Feb 9, 2020

I have the one using the 2sc2290. The signal passes thru the amp when it is off and the signal does not pass thru when the amp power is on.
You were sounding awesome coming into my receive the other day. You were walking the locals here...lol

999 · Feb 10, 2020

Unit 75 said:
Picked up one of these modulators. The relay works when I key the radio into it but I get absolutely no power output. I have tried 2 to 4 watts input drive to the amp The receive pre-amp button works and amplifies the receive, so the transistor is ok. ..just no power out. The variable pot on the front checks out ok. Is this a common problem with this model? Bad cap or something?

OK, the receive amp is separate from the output transistor. No output usually is a bad transistor.

Unit 75 · Feb 10, 2020

ok. thanks.

2NC995 · Feb 10, 2020

Just another random thought...but the relay clicking doesn’t mean power is getting through it and to the finals. Could be as simple as a bad contact.

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Texas Star Modulator -no transmit

Unit 75

"TRAINMAN"

ENC Pirate

Ocean One Cape Hatteras

Unit 75

"TRAINMAN"

999

Sr. Member

Unit 75

"TRAINMAN"

2NC995

DAN

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