>
>I have been looking at the Ameritron QSK5 unit for pin diode switching.
>Does anyone here have experience with it? The manual indicates you can
>only operate it up to 1000 watts out, but with a fan it can go higher,
>seeming to say the limit is losses/power dissipation? But, it also says
>that as SWR increases the ratings are lower, indicating the power limt
>is a voltage problem??
? Correct. The max allowable inverse for a PIN diode is c. 1000v.
RJ-1A and HC-1 vacuum relays are typically 5000 piv - and they can
recover from a static discharge - unlike PIN diodes. The switching
speed of these two vacuum relays is under 2mS if a speedup circuit is
used. See my Web site for details.
> Wonder if someone has real world experience or
>has done circuit analysis to find out the details?
Amateur radio operators who live in Florida have told me that lightning
is a problem for PIN diodes. . .
>
>Thanks Bill, K5ZQ
>
>--
>FAQ on WWW: http://www.contesting.com/ampsfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|