TEXAS STAR 1600 AS A BASE

[2315 Robert]

K I used to have a friend(WINGWALKER) MUCH RESPECT I used to talk to to when I was down south. He ran a a 16 but he drove it with a v modulator. Turned his 99v all the way down and let the the modulator handle the business. At mobile volts.

 

[Shockwave]

I'm surprised no one has mentioned the unregulated bias these amplifies use and how this circuit is dependent on not applying too much voltage. If you increase the input voltage by 10%, you also increase the forward bias voltage by the same amount and this can get you into trouble very quickly. Texas Stars are not designed to run on higher voltages.

 

[Shadetree Mechanic]

I'm surprised no one has mentioned the unregulated bias these amplifies use and how this circuit is dependent on not applying too much voltage. If you increase the input voltage by 10%, you also increase the forward bias voltage by the same amount and this can get you into trouble very quickly. Texas Stars are not designed to run on higher voltages.

Good to know, thanks.

 

[Keikiokalani]

I'm surprised no one has mentioned the unregulated bias these amplifies use and how this circuit is dependent on not applying too much voltage. If you increase the input voltage by 10%, you also increase the forward bias voltage by the same amount and this can get you into trouble very quickly. Texas Stars are not designed to run on higher voltages.

So probably it’s best to run lower than 25 volts I’m gonna stay at 14.5

 

[Keikiokalani]

Why not run it at transistor manufacture spec's?

So I’m using a fat boy 200 amp power supply with stonewall Jackson cb 14.5 volts is where it should be thanks for heads up

 

[Shockwave]

The thing to consider with the Fatboy power supply is that it's not regulated. For it to produce 14.5 volts under full load, it must put out noticeably more than that voltage under reduced load. On AM that may not cause much of a change since the load is not varying as drastically. But, on SSB with bias, the transistors would become overbiased between word peaks if that voltage goes over 16 and it probably does under no load.

 

[Keikiokalani]

The thing to consider with the Fatboy power supply is that it's not regulated. For it to produce 14.5 volts under full load, it must put out noticeably more than that voltage under reduced load. On AM that may not cause much of a change since the load is not varying as drastically. But, on SSB with bias, the transistors would become overbiased between word peaks if that voltage goes over 16 and it probably does under no load.

 

[Keikiokalani]

This is regulated

The thing to consider with the Fatboy power supply is that it's not regulated. For it to produce 14.5 volts under full load, it must put out noticeably more than that voltage under reduced load. On AM that may not cause much of a change since the load is not varying as drastically. But, on SSB with bias, the transistors would become overbiased between word peaks if that voltage goes over 16 and it probably does under no load.

 

[Keikiokalani]

The thing to consider with the Fatboy power supply is that it's not regulated. For it to produce 14.5 volts under full load, it must put out noticeably more than that voltage under reduced load. On AM that may not cause much of a change since the load is not varying as drastically. But, on SSB with bias, the transistors would become overbiased between word peaks if that voltage goes over 16 and it probably does under no load.

This fat boy is regulated and has variable hoes up to 16.5 volts I’m only going to 14 14.5 volts works great

 

[Keikiokalani]

I run my dx1600 for my base and drive it with my anytone AT-6666 1nd 150amp PS with good results. has been a reliable amp since I have owned it.

What’s the volts on the power supply do you go 15 volts or lower I have a dx 1600 using as a base and the fat boy 200 amp power supply variable to go 16.5 volts but I run it at 14 14.5 let me know what you think always get people telling different plus there not like the old school Toshiba

 

[Shockwave]

The bias in those amplifiers is designed to run on electrical system of 13.8 volts, anticipating there will be some voltage drop from that point. You might as well run the power supply there if you have the option because the extra volt is not going to do anything for your signal but will get you further away from the safe operating area of the transistors.

 

[TIN_CAN]

What’s the volts on the power supply do you go 15 volts or lower I have a dx 1600 using as a base and the fat boy 200 amp power supply variable to go 16.5 volts but I run it at 14 14.5 let me know what you think always get people telling different plus there not like the old school Toshiba

I feed amp with 14v same as my radio, I think is a safe voltage for the amp, and yes the old toshiba's can take a good beating, just have some good cooling.

 

[Keikiokalani]

I feed amp with 14v same as my radio.

14 or 14.5 to run the amp proper nothing more

 

[AudioShockwav]

Tin Can
The Toshiba's can take overvolting.
The Bias setup in a Texas Star can not.
The bias in it is NOT regulated.
That is the difference.
I would never go over 14.5
73
Jeff

 

[Keikiokalani]

Tin Can
The Toshiba's can take overvolting.
The Bias setup in a Texas Star can not.
The bias in it is NOT regulated.
That is the difference.
I would never go over 14.5
73
Jeff

14 would be just fine then