Re: QDX - RF Filter Sweep graphs?
|
Hi Johan?
Yes we are using authentic micrometals cores. They and the ferrites are both from http://kitsandparts.com a.k.a. The Toroid King.?
73 Hans G0UPL http://qrp-labs.com
-------- Original message -------- From: Johan Bodin <jbodin@...> Date: Thu, Nov 18, 2021, 12:13 AM To: [email protected]Subject: Re: [QRPLabs] QDX - RF Filter Sweep graphs? Hi,
regarding L12, the AL tolerance i.e. inductance tolerance (regardless of
winding style) is said to be +/-5% on Micrometals website:
https://datasheets.micrometals.com/T50-2-DataSheet.pdf
although I don't know if the cores supplied in the kits are authentic
Micrometals/Amidon cores. Hans is sourcing good quality components so it
will probably not be far from this figure.
Considering the large number of turns on L12, adding or removing a turn
or two could be worth the effort to put the resonance at mid band.
73 SM6LKM Johan
Brent WT4U wrote:
> Thanks Evan. I just counted again for the upteenth time and it's still
> only 19. Of course, if I'm low, I'm low, and removing one may still be
> the answer.
> 73,
> ¨CBrent WT4U
|
