Bypassing driver stage on Texas Star 667V

[d1g1man]

I have a Texas Star 667V I want to put on 10 meters.

I want to disable the pre-driver (2SC2290) to allow for higher input power.

Has anyone done this? Or know how to do it?

If you are a competent tech, could you check the schematic and get me going in the right direction?

Any help would be greatly appreciated!

Thanks.

 

[74IN]

It's been done many times. You should be in luck, many here posses that wisdom.

 

[TetroideTom]

You should be able to compare it to a texas star 500 schematic and make the nessasary disconections . Go to cbtricks.com and look at both schematics . Good luck

 

[freecell]

"I want to disable the pre-driver (2SC2290) to allow for higher input power."

how much input power?

 

[d1g1man]

25-50 Watts PEP/15 Watt carrier (FM)

Thank you everyone for your input so far!

This should not be hard, but if done wrong poof! $$$

 

[freecell]

20WPEP into 4X2SC2879's @ 13db. Minimum Gain = 400WPEP Out.
15W in for FM is good.

 

[d1g1man]

Ok

The power input sounds perfect, especially for FM.

Here is the original schematic, and then my butchered version. Feel free to laugh, flame etc.

But what to do with R7 and R10, if anything?


Original:

Extra tasty crispy:

20WPEP into 4X2SC2879's @ 13db. Minimum Gain = 400WPEP Out.
15W in for FM is good.

 

[d1g1man]

Photobucket sucks

Why in the world did they delete my pic?

I will repost it.

 

[mackmobile43]

Why in the world did they delete my pic?

I will repost it.

Probably has something to do with their TOS.

 

[d1g1man]

Thank you!

Thank you!, as I did not keep a copy.

Probably has something to do with their TOS.

 

[d1g1man]

Never mind-Thread closed.

Traded it for a DX 500V

 

[TexasStarRepair]

667v to 500v conversion

if you have not completed this, I have a complete detailed instruction which I will e-mail for free.

e-mail me and request this

TexasStarRepair@cox.net