[Elecraft] Boots for the XG3...

[Edward R. Cole]

I obtained some 7-pole LP filters from Coilcraft:
http://www.coilcraft.com/lcfilt.cfm
http://www.coilcraft.com/pdf_viewer/showpdf.cfm?f=pdf_store:lcfilt.pdf
cost $3.00 in single quantities.

This would take care of harmonic suppression.  I have five of these 
for different frequencies but have been working on other projects so 
have not measured them using the XG3.  I intend to install mine in 
1-inch copper pipe with BNC connectors for better isolation at very 
weak signal levels, but that would not be needed if incorporated into 
a beacon amplifier.  The easiest approach for that is using mmics and 
RF modules that are 50-ohm in/out.  All that is required is some dc 
bias and some RF bypassing of the dc lines.

This is probably more appropriate for a third party than 
Elecraft.  I'm guessing it would be a low volume item.

I proposed the MAR-6 plus M57735 to John Ragle.  The M57735 costs 
$67.75 from RFParts.
http://www.rfparts.com/pdf_docs/57704-68776/57735.pdf
The M57735 is rated 17w out for 200mw in, so with 20mw drive one 
might get 1.7w  (gain = 25 dB with 10mw drive).
The MAR-6 are about $5 and will provide about 16-18dB gain with 0dBm input.

Add filter, misc components, connectors, pcb, and enclosure and it is 
looking like about $100 without labor to assemble it.  Someone 
offering this as a kit would probably want another 25% markup for 
their time.  Add $12 for flat-rate shipping.

How many folks would order a kit?



73, Ed - KL7UW, WD2XSH/45
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