Not me!
Michael
On 3/14/2012 12:00 PM, sbarc-list-request@lists.netlojix.com wrote:
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Today's Topics:
1. BST Capacitors (neils) 2. SBARC Wednesday Nets (Michael@NO6O.com)
Message: 1 Date: Tue, 13 Mar 2012 12:37:57 -0700 (PDT) From: neilsneilv@silcom.com Subject: [Sbarc-list] BST Capacitors To: sbarc-list@lists.netlojix.com Message-ID: 1929897093.381750.1331667477891.JavaMail.root@plum.impulse.net Content-Type: text/plain; charset=utf-8
Anyone have any experience using these BST capacitors for antenna tuning arrays, or tunable filters ?
:-) neil KE6DCJ
======== Powering a 30V DAC from a 3V supply (CN0193) Analog Devices Model Number: CN0193
The circuit generates a high voltage signal that controls the capacitance of a BST (barium strontium titanate) capacitor. The capacitance of a BST capacitor can be altered by applying a voltage of between 0 V and 30 V to the correct terminal. This changes the thickness of the dielectric and, hence, the capacitance.
BSTs are often used for tuning antenna arrays or tunable filters. Clearly, there is an advantage in being able to tune these applications for example, compensating for component tolerance errors. This reference circuit has been engineered and tested for quick and easy system integration.
Design note here: http://www.analog.com/static/imported-files/circuit_notes/CN0193.pdf
Message: 2 Date: Wed, 14 Mar 2012 01:00:01 -0700 From: Michael@NO6O.com Subject: [Sbarc-list] SBARC Wednesday Nets To: sbarc-list@lists.netlojix.com Message-ID: 20120314080014.KENF8874.eastrmfepo103.cox.net@eastrmimpo306.cox.net Content-Type: text/plain
SBARC Wednesday Nets
Beginning at 7:00 pm on the following linked repeaters:
146.79 MHz (La Vigia Hill) 224.08 MHz (La Cumbre Peak)
Minus offset, PL 131.8
7:00pm - 7:30pm -- Amateur Radio Newsline (www.ARNewsLine.org)
7:30pm - 8:00pm -- Weekly Club Net
8:00pm - 8:30pm -- Swap Net, hosted by Dave Milton, K6HWN
Then, at 8:30pm, on 144.210 MHz, is the VHF Single Side Band Roundtable, typically hosted by Ken Owen, N6KTH. This popular roundtable is now in its fourth year. Some People start checking in early between 8:00pm and 8:30pm. For details, visit www.n6kth.com/vhf.
---Michael, NO6O
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End of SBARC-list Digest, Vol 104, Issue 5