Thanks, Don - great ideas!
Steve WD8DAS
[EMAIL PROTECTED]
http://www.wd8das.net/
------------------------------------------------
Radio is your best entertainment value.
------------------------------------------------
-----Original Message-----
From: D. Chester <[EMAIL PROTECTED]>
To: [email protected]
Sent: Wed, 23 Jan 2008 8:42 pm
Subject: [AMRadio] Re: GB> 75A-2 project ([EMAIL PROTECTED])
It might be possible to "stagger tune" the IF stages to increase
bandwidth. Use of a sweep generator (or a manually swept signal
generator) will let you know how you are doing when trying this. As
a
general rule, you can trade gain and selectivity for increased
bandwidth. You might be able to get as much as a doubling of the IF
bandwidth by this method.
Another approach might be to try overcoupling one or more of the i.f.
transformers. This might be accomplished by physically moving the
primary
and secondary coils closer to each other, if their mechanical
configuration
permits. Overcoupled tuned circuits tend to have a broader bandwidth
with a
dip in the middle of the passband. Combine this with a more loosely
coupled
stage with a narrower peak that coincides with the dip, and the sum
result
would be a broader and flatter passband with steeper skirts.
Don k4kyv
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:[email protected]
To unsubscribe, send an email to [EMAIL PROTECTED] with
the word unsubscribe in the message body.
________________________________________________________________________
More new features than ever. Check out the new AOL Mail ! -
http://webmail.aol.com
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:[email protected]
To unsubscribe, send an email to [EMAIL PROTECTED] with
the word unsubscribe in the message body.
