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
>
>
|