[minima] Re: New Crystal Filter
- From: farhanbox@xxxxxxxxx <farhanbox@xxxxxxxxx>
- To: joe@xxxxxxxxxx <joe@xxxxxxxxxx>, minima@xxxxxxxxxxxxx <minima@xxxxxxxxxxxxx>
- Date: Tue, 09 Sep 2014 17:22:17 -0700 (PDT)
joe,while developing the minima, i did try a 40 mhz ssb filter. i will send
the scan to you as soon as i get to my laptop. i had three issues with them:1.
these are not available in the local market.2. they had a number of spurious
responses. trya full hf scan to see if you get them too.3. not more then 60 db
stop band.your filter does look very good. what are the motional parameters?- f
------ Original message------From: Joe RocciDate: Wed, 10 Sep 2014 05:40To:
minima@xxxxxxxxxxxxx;Subject:[minima] Re: New Crystal FilterSteve
Made by ECS and others...sold by Digikey, Mouser and others here in US. These
are thru hole parts, about a 1/2 size low profile HC49. Should be a drop in
replacement on the existing PCB.
Sent from my tablet
-------- Original message --------
From Steve VK2SJA >
Date: 09/09/2014 7:22 PM (GMT-05:00)
To minima@xxxxxxxxxxxxx
Subject [minima] Re: New Crystal Filter
Joe,
Great news!
Higher frequency fundamental crystals for the filter at or above 30 Mhz
was one of my first thoughts. But when I went looking, and I looked
reasonably hard I thought... (obviously not), I couldn't find any crystals
to suit.
Can you give us a supplier name and part number?
Are these crystals SMD? What package style?
Thanks!
Steve.
PS. First day back at work after being knocked out of action all last
weekend with the flu. So no further mixer building/testing has happened at
this QTH. Have been following the ongoing experiments with great interest.
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