[hpsdr] The Reversed T2 transformer on Penelope Revisited

[Joe Martin K5SO]

I've learned that CHIPQUIK makes such tasks a an absolute snap without  
endangering the circuit board traces (http://www.chipquikinc.com/).

73 Joe K5SO

On Feb 1, 2011, at 6:23 PM, Scott Cowling wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Mike,
>
> The short answer is - yes, you will get closer.
>
> The long answer is - how much closer?  You *will* be closer, but you  
> will have to try it to see if it is *sufficient* for your needs.
>
> Be very careful with heat on T2 or you will melt it.  I have found  
> that the best way is to first use solder-wick to remove as much  
> solder as you can on all of the pins. Then you can use a sharp X- 
> acto knife to gently pry up each pin while applying some heat.  When  
> you have it loose, straighten the pins back out and re-solder it down.
>
> It is not hard if you are careful and patient.
>
> 73,
> Scotty WA2DFI
>
>
> At 05:04 PM 2/1/2011 -0800, Mike F wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> I have just finished incorporating a power amp and low pass filter  
>> assembly from a Yaesu FT-900 into my HPSDR system (Note:  This is  
>> an extremely straight forward incorporation.  I can supply details  
>> to anyone interested.).  The system works great with this setup,  
>> but the PA is rated at 100 watts and I am only able to drive it to  
>> 60 watts using Penelope without Pennywhistle.  I was operating on  
>> 20 meters and after setting the PA gain in PowerSDR to 38 for 20  
>> meters I reached 60 watts with the slider at 18 and had no increase  
>> after that.
>>
>> I have read the wiki entry about the reversed T2 problem on  
>> Penelope and have verified that my T2 is reversed.  My question  
>> is:  Will reversing T2 provide me with sufficient drive on 20  
>> meters to get closer to the 100 watt level?
>>
>> Thanks
>>
>> Mike, K7SR
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