[R-390] Correction in My ER Article

[Dan Merz]

 Hi Bill,  but the P/N you give in the email is for the 8 ma relay and is
the same as in the ER article.  Isn't the correct P/N 653-G6A-274P-DC48 for
the 5 ma type?  At least it appears as such in my 627 catalog p 1363. Or am
I missing something here?  Enjoyed reading the article and appears to be a
good mod that I may try someday.   Dan.


-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of William G Feldmann
Sent: Friday, September 22, 2006 4:53 PM
To: R390 LISTINGS
Subject: [R-390] Correction in My ER Article

Hi All,

I made a big P/N goof in my R-390A article in the September issue of
Electric Radio.  I just found out about it when I returned this week from my
New Mexico vacation.  It was my fault not being more careful re-looking up
the part number after doing the modification and loosing the bag with the
part number the relay came in.

I mistakenly listed in the text for the product detector modification a 8ma.
coil relay instead of the 5ma. one I used.  The right Mouser P/N is
653-G6A-274P40-DC48.  But if someone has already ordered the wrong relay it
will work fine if a 22K coil resistor is used in place of the 39K in the
schematic for R2B.  Also I used a 5 watt metal film resistor for R2B because
I happened to have one and not a 2 watt that is smaller and will work fine
since the required dissipation is only .94 watts.  So a 2 watt will work
fine for R2B if you have one or are ordering the resistor.

There will be a correction in the October issue but just wanted to give
those of you on the reflector a heads up because some of you may be the most
likely to use the modification.  Also readers seem to often miss the
corrections.  Next time I'll be more careful.

Bill N6PY

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