[hpsdr] Re Munin low output on 6m

[a.groff]

Kjell,
    I have the Caps on order and will report back..
    If the problem is in the final output transformer shouldn't the t1-2 
source current increase as driver is increased above saturation ??
    At 40watts output ( below saturation ) the drive required for 40 
watts out is basically flat from 160m thru 6m.

AL, K0VM


On 11/16/2013 3:30 AM, Kjell Karlsen wrote:
> Hi Al.
>
> I agree that the problem might be one of the capacitors. All my 
> problems with low power on 6 meter has been with the output 
> transformer and components around it.
>
> Please report back when you have tested with new capacitors.
>
> 73, Kjell
>
>
>
>
>
> På Sat, 16 Nov 2013 00:33:28 +0100, skrev Bob Campbell 
> <joan-bob at bigpond.net.au>:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi Al,
>>
>> Check caps C25 C26 C27 are all ok.
>>
>> Mine failed when I went to load it up on 6m, blew the cermic cap apart.
>>
>> As Kjell suggested in a previous post replace these caps with four 220pf
>> 500vw 1206 caps.  Since doing this mine has been ok.  I suspect with
>> this mod the current is shared evenly between all 4 caps and the circuit
>> is much more stable and I have no trouble getting the desired output on
>> 6m now.
>>
>> 73's
>> Bob.c
>> Vk4xv
>>
>> _______________________________________________
>> HPSDR Discussion List
>> To post msg: hpsdr at openhpsdr.org
>> Subscription help: 
>> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>> HPSDR web page: http://openhpsdr.org
>> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>>
>>
>
>


 1384621476.0