[HBR] BC453 IF transformers in HBR11

[Bill W2DGB]

Scott,

Just reread this from you and can offer some thoughts...

The usual way to wire a receiver is 1. The power supply, and then the audio.  2. Then go to the Ifs and so forth.

i.e....from the back towards the front, checking as you go.

Another thought:  I just learned the AWA Museum received a bunch of crystals from the Bliley Co when they got out of the business  (At least that is what I heard.)  If you need a crystal, you can contact Ed Gable at the museum...he just might have what you need.

73,  Bill   w2dgb



-----Original Message-----
From: hbr-bounces at mailman.qth.net [mailto:hbr-bounces at mailman.qth.net] On Behalf Of Whitebear1122
Sent: Friday, January 26, 2018 3:49 PM
To: ka9p at aol.com; HBR Receiver List <hbr at mailman.qth.net>
Subject: Re: [HBR] BC453 IF transformers in HBR11

Just my 2 cents.  I’ve resumed working on my HBR-13.. I know, it’s taking a long time.  I got held up with the IF’s as well.  After some trial and error I decided to move the center frequency from 85 KC to 100 KC.  I unsoldered the fixed caps in the can, replaced them with 120 PF silver mica’s, and they are now right around 100 KC.  I’ve converted 2 out of the 4 so far.  The first two are the input IF configurations.  The second stage will use the tapped 2nd IF, and the third stage will use the tapped 3rd IF.  

I have the RF front end and first two 1600 KC stages wired.  Starting on the 100 KC stages now, so I have not tested this out yet.  

I’m thinking that there will be plenty of gain with those regenerative IF stages that the tapped IF’s will be find.  If not, then I’ll change them out.

73, Scott WA9WFA


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