Re: Bitx20V3b/3c - Need Part Information for L1-L3
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afterall it is easy to compute the inductance of coil with 39pF cap in parallel to give a centre frequency of 14.1 (for 20m band? range assuming 40 to 14.2.
?I use mini ring core calculator where in LC parallel resonant? calc is there
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Any other calculator is equally good . as per that i get L as 2.68uH.
?i generally wind 10mm Toko type coil former with 14 to 16 turns? and i get adjustable inductance around 3.3uH.
The secondary could be 4 turns.
On Thu, Oct 5, 2017 at 5:23 PM, dave <nt1u@...> wrote: Doug Hendrick's recently published a dropin pcb replacement for the 42if123.? ?He was learning how to make boards, and this was his project.
He documented it in the qrp-tech files area, under KI6DS.? ?Article is 42IF123Daughtercard.pdf
Looks straightforward to replicate.
? dave? ?/nt1u
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