[HBR] BC453 IF transformers in HBR11

[B. Smith]

    When choosing IF coils and 2nd Osc crystals be sure and check your 
local listing to see what frequency the AM radio stations are on.
k4che
http://k4che.com/HBR/Testing/Progress%20Testing%20pg%201.htm


On 2/15/2018 5:04 PM, Bill W2DGB via HBR wrote:
> 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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