[Boatanchors] RF Driver Pot Replacement

Ray Friess rayfri at highstream.net
Thu Jun 3 22:57:28 EDT 2004


I have a dx 100.  wondering what mod youre referring to?
Ray  wa7itz

James M. Walker wrote:

>Hi Bill,
>A shorter way to success and also gaining a few extra parts along the
>way
>is to get yourself a few old computer power supplies, and strip the
>devices out of them. The transistors have a 300 volt rating at lots of
>amps. I garnered quite a few when I did that mod for one of my Heathkit
>DX-100 transmitters. It is an easy fix and works just fine. No more 25K
>4 watt headaches.
>Jim
>WB2FCN
>
>
>Bill Pancake wrote:
>  
>
>>Hello All.....  I ran across an article on the web by Norm, WB2SYQ, regarding the use of a "garden variety" HORIZONTAL OUTPUT DRIVER TRANSISTOR with avoltage rating of at least 300 volts, a 1meg, 1/2watt linear taper pot and a 470k, 2watt resistor to replace a faulty (and expensive) RF drive pot in a Valiant transmitter (4watt, 25k ohm). Can anyone advise as to a standard NTE or similar part number for this "garden variety" transistor?  Thanks, Bill, ab0zz at arrl.net.
>>
>>_______________________________________________
>>Boatanchors mailing list
>>Boatanchors at mailman.qth.net
>>http://mailman.qth.net/mailman/listinfo/boatanchors
>>** List Administrator - Duane Fischer, W8DBF/W9WZE **
>>** For Assistance: dfischer at usol.com **
>>$$ For vintage radio info, see the HCI web site $$
>>http://www.w9wze.org
>>    
>>
>_______________________________________________
>Boatanchors mailing list
>Boatanchors at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/boatanchors
>** List Administrator - Duane Fischer, W8DBF/W9WZE **   
>** For Assistance: dfischer at usol.com **         
>$$ For vintage radio info, see the HCI web site $$      
>http://www.w9wze.org    
>
>
>
>  
>


More information about the Boatanchors mailing list