[R-390] More Power Line Filter Replacements

[n4buq at knology.net]

On Tue, 21 Nov 2006 21:15:12 -0600, "Barry" <n4buq at knology.net> wrote :

> Gentlemen,
> 
> I'm curious how much interest there might be in having a replacement line 
> filter similar to the ones I made here:
> 
> http://www.knology.net/~thelanding/LineFilter/
> 
> I'm thinking of having some custom plates manufactured that would accept 
a 
> filter like the one in the pictures, but instead of it hanging off the 
back 
> like these, it would be mounted completely inside the radio where the old 
> filter mounts.  The IEC connection would be just inside the hole where 
the 
> original filter mounts.  The original design in the website above has the 
> filter mounted where it sticks out from the back.  It's not bad (it's 
only 
> about 1/8" beyond the edges of the side panels) but it doesn't look all 
that 
> neat.
> 
> I have a design, but having the plates manufactured is somewhat expensive 
> unless I have a lot of them made.  The tooling/setup charges have to be 
> spread over the entire quantity to bring down the price per piece.
> 
> The bracket and filter together will probably run in the $30 to $40 
range, 
> again depending on quantity pricing.  If I get enough interest, I may 
pursue 
> this, so if you think you would be interested, drop me a line.  This will 
be 
> a substantial "investment" on my part so not entirely sure I can do this, 
> but it would be something I think a lot of folks on and off this list 
might 
> want so I'm trying to get a feel for interest levels before I try this.
> 
> Thanks,
> 
> Barry - N4BUQ 

List,

I've had a few replies so this may be something I'm going to try.  If I 
don't sell them all to this list, then there's always the auction sites and 
other outlets.  There are a lot of R390As out there so I think getting rid 
of 25 or 30 of these shouldn't be too big of a problem.

I want to put together a prototype and will try to do that as soon as 
possible.  I hate to keep asking my friend for time on his milling machine, 
but maybe if I only make one or two, he won't mind.  When I get it 
finished, I'll post some pictures to the same site.

Someone asked about the R390 filter.  I'm not familiar with the filter or 
the mounting arrangement for it.  I've found one picture of the inside of 
an R390 and can't make out much about the way it's mounted or how the 
connections look.  If someone wants to send me some closeup pictures, that 
may be enough to figure out if these would work.  Maybe a different 
arrangement can be made for the R390.

Regards,

Barry - N4BUQ