>Hi Rich,
>
>PINs are readily available to 1000Vpk and of course can be placed in series
>for higher voltage applications.
** Hello, Steve -- For 10kW @ 50-ohms, a minimum piv of 2000v is needed.
>Remember, a PIN is not a P-N junction
>device and doesn't really have a "PIV" rating...when biased OFF, its a large
>value resistor and when biased ON, it's a small value resistor....using
>power devices that can be biased ON with amperes of current, that resistor
>can become *really* small......-WB2WIK/6
>
>"Success is the ability to go from failure to failure with no loss of
>enthusiasm." -Winston Churchill
>
>> -----Original Message-----
>> From: 2 [SMTP:2@vc.net]
>> Sent: Tuesday, June 17, 2003 7:15 AM
>> To: Dr. William J. Schmidt, II; on4kj; AMPS
>> Subject: Re: [Amps] electronic switching
>>
>> >Well, we do..... there are diodes that will handle as much as 10kW....
>> but
>> >they are expensive. Harris uses them in their gear...
>> >
>> ** What is the piv rating of such diodes, William?
>>
>> >Sincerely,
>> >
>> >Dr. William J. Schmidt, II K9HZ
>> >
>> >"Collector of Edison Wind-up Phonographs... Do you have one for me?"
>> >Email: bill@wjschmidt.com
>> >Alternate Email: wmschmidt@charter.net
>> >WebPage: www.wjschmidt.com
>> >
>> >
>> >
>> >----- Original Message -----
>> >From: "on4kj" <on4kj@skynet.be>
>> >To: <amps@contesting.com>
>> >Sent: Sunday, June 15, 2003 2:44 PM
>> >Subject: [Amps] electronic switching
>> >
>> >
>> >> Hello Folks,
>> >>
>> >> About steatite wafers used for band switching.
>> >> Why dont we see switching systems based on pindiode, for input ( 100 w
>> )
>> >> must be possible nowadays. Even for high output power !!
>> >> What say ?
>> >>
>> >> Jos on4kj
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "Osten B Magnusson" <sm5dqc@algonet.se>
>> >> To: <amps@contesting.com>
>> >> Sent: Saturday, June 14, 2003 10:35 AM
>> >> Subject: [Amps] 572B's WARNING
>> >>
>> >>
>> >> >
>> >> >
>> >> > STAY AWAY FROM RICHARDSON ELECTRONICS, ENGLAND www.rell.com
>> >> >
>> >> > 572B's are sold here in Europe by different dealers, the tubes are
>> >> distributed by Richardson Electronics in England, and they claim that
>> it's
>> >> Cetron tubes manufactured for National. Sorry to tell, but it isn't the
>> >> truth - it's newly produced Chinese tubes re-badged by Richardsons as
>> >> National and also have ''Made in USA'' printed on them. So be careful,
>> >> before buying. I have been offered, not by Richardsons, but by the
>> >> distributor to get a full refund if sending the tubes back. Richardsons
>> >does
>> >> not even answer e-mails...
>> >> >
>> >> > This is part of an e-mail from a serious distributor in England:
>> >> >
>> >> > >>Hello Osten,
>> >> > >>Taylor is a brand name for RF parts but these can be re-badged
>> >any
>> >> type!
>> >> > >>We have National 572B which are badged by Richardsons which is
>> >the
>> >> main
>> >> > >>outlet for Eimac, but need not be Eimac !
>> >> >
>> >> > There are original Cetron NOS 572B's available here in Europe, have a
>> >look
>> >> at www.clhi-fi.it It's in Italian, but click on ''Surplus'' and
>> than
>> >> ''avanti'' to go to page four. There are no prices on the WEB, but in
>> an
>> >> e-mail they asked 500 ''euros'' for a matched pair, plus postage.
>> That's
>> >> totally USD 645 for a matched pair!!! I know that there are also NOS
>> >> Cetron 572B's available in USA, but unfortunately we have to pay more
>> >> postage, customs, 25 percent VAT etc. so here we always try to buy from
>> a
>> >> European Community country, this was no customs and other extra charges
>> to
>> >> pay.
>> >> >
>> >> > Probably time to get all ''glass tubes'' amplifiers marked ''junk''
>> and
>> >in
>> >> the future only get amplifiers with ceramic tubes!
>> >> >
>> >> > 73 de Osten SM5DQC e-mail: sm5dqc@algonet.se
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > _______________________________________________
>> >> > Amps mailing list
>> >> > Amps@contesting.com
>> >> > http://lists.contesting.com/mailman/listinfo/amps
>> >> >
>> >> >
>> >>
>> >>
>> >> _______________________________________________
>> >> Amps mailing list
>> >> Amps@contesting.com
>> >> http://lists.contesting.com/mailman/listinfo/amps
>> >
>> >_______________________________________________
>> >Amps mailing list
>> >Amps@contesting.com
>> >http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>> Rich, AG6K, 805-386-3734, www.vcnet.com/measures
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
Rich, AG6K, 805-386-3734, www.vcnet.com/measures
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