| NEW "2008" PC BOARDS NOW AVAILABLE! 8/12/08 I now
have some 3-part "DQ" PC boards for sale. They will feature the
same
3496 Hz Double Quadrature (DQ) receiver and preamplifier, but will have
an improved class-E
beacon transmitter design with greater than 90% efficiency. A
special toroid
for the beacon along with the wire to wind it will be included with
each board because of the high cost of small quantities of these
parts. Detailed information on the new boards and especially the
new beacon, along with new loop antenna designs for it, are given
here. There is sufficient information on this website to
construct and operate the receiver and beacon, and I am available by
email to answer questions during construction. NOTE: I have
sold all of the DQ receiver boards!!! I still have some Class-E
beacon boards as described below.
I also have separate improved Class-E beacon boards (with toroid and wire) for sale for those wishing to upgrade or add a second beacon. The links below are the latest information, just updated. The "Complete Information" 7/30/03 below is out of date for the beacon but mostly OK for the DQ receiver. The "Construction and Use" articles are now quite out of date, but the theory, block diagrams, applications, etc are still useful. The 2008 DQ Receiver and Beacon PC boards The new Class-E beacon design and construction Examples of antennas for the new beacon designs DQ Receiver parts list - updated New Class-E Beacon parts list High Impedance Headphone sources |
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BOARDS FOR THOSE LOCATED IN THE USA OR CANADA I am selling the boards as a
service at my cost. The cost of one 3-part board (receiver,
preamp, class-E beacon with toroid and wire) is $27.00 plus $2.00 for
first class postage. Two boards are $54.00 plus $3.00 for
postage. The DQ receiver
boards are sold out.
I also have separate PC boards for the new class-E beacon (including the toroid and wire) at $8.50 each plus $1.50 postage(for USA) These boards are still available. Email me with any questions  Contact me first for availability,
then send a check made out to Brian
Pease (for those in US), or for those in Canada a check drawn on a US bank, a
postal Money Order in US funds, or by PayPal in US funds for 5% more
cost. Ask and I will send you a request for the funds via PayPal,
with instructions.
Brian Pease
431 Westford Rd Milton, VT 05468 |
| PC
BOARDS FOR THOSE LOCATED OUTSIDE THE US OR CANADA The board prices are the same as
for the US but postage varies. Just email me to obtain the postal
rate for your order. Payment methods are the same as for Canada
above.
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