[Drake] Matching T4x filters for R4C first IF

[Al Parker]

Hi Scott, et al,
	I have an R-4A which has had this done to it, makes it very nice.  The 
previous owner didn't like the non-stock idea, a toggle switch on the 
front panel to change SB's, and maybe didn't appreciate how  nice it 
was.  So I got it at a good price some yrs ago.  There was an article 
somewhere, one of the mags 15+ yrs ago I think, I should have a cc in my 
archives, I'll take a look.  I don't think the term "roofing filter" was 
in use back then.
73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 11/5/2012 11:35 PM, Ka9p at aol.com wrote:
> hi -
>
> I've found a few references to using T4x filters as roofing filters for SSB
>   in the R4C.  I know that the transmitter filters are 500 ohm, and I think
> the required filters are 1000 ohm.
>
> Has anyone seen an article or know what needs to be done to match the
> impedance, or whether being off by a factor of 2 is enough to seriously degrade
> the performance?
>
> Thanks, Scott KA9P
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