[HBR] Fw: HBR-16 + RME 45...

Kees & Sandy windy10605 at juno.com
Wed Aug 29 22:41:34 EDT 2007


Sure, you can substitute for the transformer coupling but the BC-453 transformers are relatively easy to find (maybe not in VK/ZL) and if not, you can make them from 455Khz transformers. I put a writeup on the website in the "Hints and Kinks" section on how to make your own 100Khz transformers that way. Works fine and they have good "Q". But that's the beauty about "homebrew"   ....you can build what you want to build and try something new.
73 Kees K5BCQ.

-- KBG Luxford <kbgluxford at fastmail.fm> wrote:
Would a "good enough" substitute for an IF transformer consist of a 
couple of commercially manufactured inductances or chokes of the "right" 
inductance value, each in parallel with capacitance to provide resonance 
at the intermediate frequency and joined at the top by a small amount of 
capacitance?  In other words a pi network with each leg a resonant 
parallel combination of L and C and the top a coupling capacitor?  Do we 
really need mutual inductance between the anode of one stage and the 
grid of the succeeding stage?

73
Kevin
VK3DAP / ZL2DAP
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