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Re: [CQ-Contest] seeking 9band bandpass filter unit

To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] seeking 9band bandpass filter unit
From: Jim Brown <k9yc@audiosystemsgroup.com>
Reply-to: k9yc@arrl.net
Date: Tue, 21 Jul 2015 12:55:40 -0700
List-post: <cq-contest@contesting.com">mailto:cq-contest@contesting.com>
On Tue,7/21/2015 11:28 AM, Wayne Kline wrote:
Hi Jim. Bob 5B4AGN,s. Band pass filter kit,s are tempting. The site has rough assembly (ballpark) winding facts. Being retired I my self no longer have the access to a network analizer . The assembled kits are a work of art. And IMHO a winner if you have access to the tools to achive the W3NQN design limits

I agree that a VNA is needed for best results. I own the VNWA 3e designed by DG8SAQ and sold by a ham in the UK. Three years ago, it cost me about $700 delivered to my door in W6.

http://sdr-kits.net/VNWA3_Description.html

Ask around among your ham friends -- there's a good chance that you can borrow a VNA.

Other potential issues -- you'll need to solder a lot of SMT bypass caps on the motherboard and on the daughterboards. Those are large enough that most of us can do it. The tiny ones on the decoder board are another story -- I got a neighbor to do those for me.

73, Jim K9YC
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