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[AMPS] QRO HF2500 x ALPHA89 - some experience [OK1RI]

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Subject: [AMPS] QRO HF2500 x ALPHA89 - some experience [OK1RI]
From: measures@vc.net (Rich Measures)
Date: Sun, 22 Jun 97 08:41:32 -0700
...snip... 
>As I am interested in the HF-2500DX, the problems with tuning on 40 and 160
>meters seem serious and fundamental.  I would be interested in any comments
>regarding good and bad points of this amp that this forum could provide. 
>Tnx    W8KX

Half of the fun with a new amplifier is fixing design problems.  If you 
fix the tank design oversights on 40m and 160m, you will learn something. 
 Is this not better than being a vegitative appliance operator?  
Remember: there is no perfect amplifier. 
- On my Web site, there is an Excel 4 worksheet for tank calculations, 
courtesy of Vince, that may be helpful.  
http://www.vcnet.com/measures 
If you would like to discuss fixing the tank design, please feel free to 
telephone me.  
- If you succeed in fixing a HF2500, other people would surely be 
interested in how you went about it.  What would you think about writing 
a 'circuit improvements for the HF2500' article?  If the powers-that-be 
at QST magazine reject the article, you are welcome to publish it on my 
Web site if you like.  
-Rich-.  
>
>> 8.The PI tank is designed so that on 40m you can not tune it properly
>>there is not enough capacity on the antenna side of the PI, 
...snip...

R. L. Measures, 805-386-3734, AG6K   


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