[hpsdr] Munin

[Kjell Karlsen]

Hi Ken.

It is correct that Mitsubishi specify RD100HHF1 up to 30 MHZ. This  
transistor is however used by most of the manufacturers of Amateur  
equipment also on 50 MHz and 100W PEP when run at >13,8V Vdd.

Normally Munin works at 50 MHz without any problems. The reason why the  
capacitors let out smoke is the ratings. I have never encountered any  
capacitor problems when I used 500v/ NP0 material even on the 470 pF. I  
have also used Munin on 24V Vdd and still no problem. I am not sure of the  
correct PN for the 470 pF delivered with the kit.

Replace the original capacitors with 4 pcs AVX PN:12067A221JAT2A or  
equivalent.

73, Kjell




På Mon, 20 Jan 2014 09:04:24 +0100, skrev Tony Hagen <prosdr at gmail.com>:

> ***** High Performance Software Defined Radio Discussion List *****
> Hi Ken,
Yes, I am also dropping idea to test at 6m further since the caps are  
heating. Moreover, the logic doesn’t apply much because the Power-Mosfets  
are meant for 0-30 Mhz as per the datasheet so 6 meter claim doesn’t makes  
sense.
73s
Tony
From: Ken Shutt
Sent: Monday, January 20, 2014 3:07 AM
To: Tom McDermott ; Tony Hagen
Cc: hpsdr at lists.openhpsdr.org
Subject: Re: Munin


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