[HBR] Use of single 1610 kcs transformer?

[Bill Fizette]

One approach is to replace the missing 1600 kc unit with an RFC coupled to 
the first IF, the 1600 kc unit you have.

Another:  Faced with a similar HBR problem a while back, I took two 455 kc 
IFs of the right physical size, and removed coil turns until they came into 
the 1600 kc range.  I used a Heath Q meter to measure the process, but there 
are other ways to get you there.

Another:  Use two of the classic "loopsticks" that were prevalent some years 
back.  As I recall, these were used as antenna units for small BC sets.

I can't claim originality here;  all of the above came from my literature 
readings.  Of course, you can always go back to ole' Ted's original circuit, 
and make the things.  If you have the space.

73,  Bill   w2dgb



----- Original Message ----- 
From: "C Eus" <catman351 at gmail.com>
To: <hbr at mailman.qth.net>
Sent: Sunday, May 16, 2010 10:04 AM
Subject: [HBR] Use of single 1610 kcs transformer?


> All:
> I only have access to one genuine 1600 kcs IF transformer.  I do not have
> access to a second to emulate any of the HBR 1600 kcs dual IF transformer
> configurations.  What would be the "penalty" for not conforming to this
> configuration?  Obviously, selectivity issues may crop up.  However, I 
> plan
> on maintaining the triple 100 kcs IF transformer chain ala the W6SAI 
> "deluxe
> HBR" plan.  Looking for more comments/suggestions on this portion of the
> project.
>
> FYI, I just took a look at Jay Helm's IF strip set up.  Looks "kewl."
> However, my strip should be a little thinner.  The nice thing about the 
> HBR
> set up is one can, within reason, articulate a reasonable variation to 
> suit
> one's tastes.
>
> Cal, N6KYR/4
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