[hpsdr] Reverse Power Tolerance

[Jim Sanford]

Sorry,  . . . BETWEEN the radio and the *_/TUNER./_*

Jim


On 12/31/2018 5:10 PM, Jim Sanford wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> One counter-argument:  What about the components in the low/band pass 
> filtering?
>
> I ask, because I have repaired several bandpass filters for our club 
> that were blown up running 100 watts into an antenna with high (2 or 3 
> SWR).  We have been pounding on guys to put the filter BETWEEN 
> theradio and the antenna . . .
>
> 73, Good luck, & Happy New Year!
>
> Jim
>
> wb4gcs at amsat.org
>
>
> On 12/31/2018 10:27 AM, Helmut Oeller wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> HI Tony,
>>
>> the final MOSFETs are specified with : 'no destroy'  at a load 
>> VSWR=20:1(All
>> Phase).
>> So no concern, if your meter even shows 3:1 equal 50 percent 
>> reflected power
>> for a short period of time. On the other hand it makes no sense to run a
>> antenna with 3 dB mismatch.
>> Excessive mismatch endangers the finials due to therminal stress 
>> and/or RF
>> voltage issues, but usually no problem for the driver or actually your
>> exciter board Hermes.
>>
>>
>> 73, DC6NY
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Hpsdr <hpsdr-bounces at lists.openhpsdr.org> Im Auftrag von Tony Hagen
>> Gesendet: Montag, 31. Dezember 2018 10:46
>> An: hpsdr at lists.openhpsdr.org
>> Betreff: [hpsdr] Reverse Power Tolerance
>>
>> ***** High Performance Software Defined Radio Discussion List *****
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