[Boatanchors] D-104 Elements

[Kenneth D. Grimm, K4XL]

Bob Sullivan wrote:

> Since it appears that replacement elements for the D-104 are nearly 
> impossible to find I am considering using one of the Heil HC-104 
> "D-104 kits." I would appreciate hearing any comments on this kit!
>
> 73, Bob
> WØYVA
> Personal site: http://www.isquare.com/personal_pages/ras-hardware.htm
>
At $59.00 the Heil conversion kit is a wee bit expensive.  Of course, 
you are getting an impedance matching transformer that you will need in 
order to use the Heil element with our old boatanchors.  This is not a 
simple "pop in the new element and go" conversion. 

When my last D-104 element gives up, I plan to order a couple of the 
crystal and ceramic elements that Mouser carries.  The Kobitone elements 
are cheap enough to be worth doing a bit of experimenting.  Mouser's 
25LM025 is a Crystal element with a 30-15KHz response and an impedance 
of 12K, a sensitivity of -55db and is 1inch diameter by .42 in thick and 
sells for $3.83.  Mouser's 25LM037 is a Ceramic element with very 
similar characteristics and sells for $3.91.  These elements are close 
enough to the original D-104 specs to make giving them a try very 
attractive.

The only connection I have to Mouser is that my cat sometimes answers to 
that name...and then sometimes she doesn't.  :-)

73,
-- 

Ken K4XL
k4xl at arrl.net

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