My W3NQN filters have been working fine for several years. They still
function as new. They don't overheat at 100W out. It was a good investment.
I have both theW3NQN receive and transmit filters from 10-160M.
N2TK, Tony
-----Original Message-----
From: cq-contest-bounces@contesting.com
[mailto:cq-contest-bounces@contesting.com]On Behalf Of Mario, S56A
Sent: Tuesday, June 13, 2006 2:22 AM
To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] Filters
W0UN: And at no time did any capacitors fail the 200 watt test -- or even
get very warm.
I guess you were lucky! I made W3NQN filters with a big VU mica caps for 2
kV and they all failed on 7 MHz and above.
Manufacturer sent us new batch for free but they are not tested yet. DL2NBU
specifies VAR power ratings required.
Simple ICE filter configuration should survive most abuses but 21/28 MHz
isolation is not good enough for SO2R.
Please note that BPF info is available in ON4UN book on low bands.
73 de Mario, S56A
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|