At 9:46 AM -0800 2/10/98, Vic Rosenthal wrote:
>Dick Flanagan wrote:
>>
>> At 1:37 AM -0800 2/10/98, Rich Measures wrote:
>>
>> >>Is this the kind of switching normally provided by something like the
>> >>outboard Ameritron QSK-5 or am I confusing it with something else?
>> >>
>> >I know zero about this product, Dick. Does it use a high speed vacuum
>> >relay or a PIN diode to switch the output?.
>>
>> PIN diode. See http://www.ameritron.com/other/qsk5.html
>
>The info at this address claims that a vacuum relay can 'barely keep up
>with' modern
>QSK transceivers, and a PIN diode system is better for that reason. I can
>tell you
>that a vacuum relay --when used with a current-limited 150v source-- can
>keep up with
>a TS-850s with the internal keyer set a maximum (probably at least 55
>wpm). I put a
>scope on my rig and saw absolutely no difference (except amplitude) in the
>output
>with full QSK when the amplifier is on or off. Relay life with this
>system is an
>unanswered question, but it cost me about $75 to implement as opposed to
>the $349
>that Ameritron wants.
Thanks, Vic.
The reason I brought up the Ameritron unit is I recently bought a used one
to use with my L-4B and I was curious what the consensus of opinion was
regarding the pairing.
73, Dick
--
Dick Flanagan W6OLD CFII Minden, Nevada DM09db (South of Reno)
Visit http://www.qsl.net/w7di/
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