[TowerTalk] HP8761A

[Bob Nielsen]

On May 26, 2009, at 9:15 PM, Roger (K8RI) wrote:

>
>
> jimlux wrote:
>> John Kemker wrote:
>>
>>> Yeah, that's why I'm asking others about it.  It's only rated for  
>>> 10W, but has a 5kW peak?  That's an interesting spread.  I wonder  
>>> why the large range between nominal rating and peak rating?
>>>
>>>
>>
>> The average rating is determined by heating.  The peak rating is  
>> determined by voltage breakdown.
>>
> Unless I'm missing something,  this would render the peak rating  
> meaningless for almost all amateur use  Even SSB  at 100 watts PEP   
> is going to be pushing the 10W average unless making short  
> transmissions. About the only thing I can think of that might work  
> would be short pulses of high speed digital.

Correct.  They definitely weren't aimed at (or priced for!) the  
amateur market in any case.  I used a few of these switches in the  
1970s to switch between horizontal and vertical feeds in an antenna  
test range (anechoic chamber) at Hughes Aircraft in Canoga Park, CA.

Bob, N7XY