[HBR] BC453 IF transformers in HBR11

Scott McDonald ka9p at aol.com
Fri Jan 26 13:45:54 EST 2018


Thanks Breck, makes sense.  I’ve got an old chassis with the sockets, I may build the IF strip on that an experiment there. Your website is super useful to me, thanks for making it!

Sent from my iPad

> On Jan 26, 2018, at 12:04 PM, B. Smith <smithab11 at comcast.net> wrote:
> 
> I would install  the coils so that you can plug them in or use the miniature bandana pins this way you can experiment. I would just use the coils as is and ignore the center taps.
> Have fun, its a great project.
> breck
> 
>> On 1/26/2018 12:10 PM, Scott via HBR wrote:
>> ..and those notes were really helpful last night as I was sorting stuff out and testing the transformers.  Really good stuff.
>>  But what I'm stuck on is whether I should use the tapped or untapped style.  Looking at the schematic, I see TC seemed to use the same Millen coils in all three positions, and I'm inclined to use the three matching 3d IF transformers that check out OK per the tests on the website.
>>  But if there was magic in using the BC453 1st IF in the first IF I would do it, I just don't see any comment about whether there is anything critical about which of the 453 transformers can be used where..and I'm not bright enough to ferret that out :)
>> 
>> Thanks again, that website was great, especially the BFO part (next problem to solve....)
>> 
>> 73 Scott
>>    
>> 
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