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Re: LZ1AQ possible changes

 

Hi Nils,
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On my Improved LZ1AQ design the inductance @100Hz is 610uH on each winding and with the two in series it is 2,395uH. The gain from 100kHz to 20MHz is 30dB? and is 27dB at 30MHz. I don't Know how you can improve on that? Also I am using the lowest NF transistors you can find, which is a 1dB NF.
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Everett N4CY

In a message dated 2/10/2025 6:41:48 AM Central Standard Time, nilsp@... writes:
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On Mon, Feb 10, 2025 at 07:19 AM, Fred M wrote:
I dont know where he takes this value from?
I think he ist referring to the original schematic on the LZ1AQ website. The transformer there ist trifilar with 18uH each (5 trifilar turns on a toroidal core, u=1000, 10x6x4 mm). He probably recalculated the inductance.
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Best regards,
Nils
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