[hpsdr] CC Amps for 6M

[Kjell Karlsen]

Hi.

The MRF492 is one of the few old Motorola 12V PA transistors that is  
specified up to 50 MHZ. May be if you replace the original transistor with  
this one, you can use it on 50 MHz too. You may have to alter the values  
of some of the capacitors to get more output on the 6 meter band.

I think it is worth trying!

73, Kjell





På Tue, 09 Feb 2010 20:33:25 +0100, skrev <lstoskopf at cox.net>:

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>
> I have two of the CC 140 W amps that I've had for a LOOOONG time.  They  
> work well, although I tried to get them to work at 6M.  No real luck.   
> Like the newbie I was in the 70s, I called the Moto Number on the design  
> sheet.  "Grenberg!"  After my profuse apology for being a Ham and  
> calling the king, I mentioned my problem.  "We couldn't make them work  
> up there in that broad band application either or we would have spec'd  
> them that way."  A few more minutes of courteous discussion I thanked  
> him again and concluded my moment with greatness.
>
> Interesting that the DL amp gets that bandwidth with the device they  
> used and that they didn't use  FETs in the finals.  Awaiting someone's  
> power out vs freq data., etc.
>
> N0UU
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