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Toroid information
Posted: 04 Dec 2022, 10:22
by Jan PA3GGZ
Yesterday I received the parts for the lo version of the (tr)uSDX from the official supplier on ebay. In the box I found a small paper with the winding details for all toroids. They are different from the schematic I found on the website. What should I do?
73, de Jan PA3GGZ
Re: Toroid information
Posted: 04 Dec 2022, 14:06
by Max
Hello Jan,
I just asked that myself and got this as a reply
viewtopic.php?t=728
Maybe that help you as well
Re: Toroid information
Posted: 07 Dec 2022, 20:17
by DL2MAN
Can you please Show whats different?
I assume, Sunnys team experimented with their supply of toroids and came up with different amount of Turns for best Performance.
This might save you some Tuning effort.
But to be Sure, i need to See the difference.
Anyway: If you follow my instructions and tweak/tune Afterwards you will end Up with a rig within Specs.
73 Manuel DL2MAN
Re: Toroid information
Posted: 07 Dec 2022, 21:05
by Max
Hi Manuel,
with Sunny's kit I can also help as I also just received it. That's what was included in my package
I measured the values at 10khz
- lotrusdx.jpg (153.89 KiB) Viewed 1078 times
Re: Toroid information
Posted: 08 Dec 2022, 08:13
by DL2MAN
Hi,
I could spot a single deviation from my Schematic. L52, where I give 14T while Sunny says 15T.
I have no Idea why. Either it´s a mistake or she found out, second harmonic notch was more accurate this way. (with the Toroids, she is supplying - My Values were determined for Amidon Toroids)
Besides that, she has only changed T2 from 1:7 to 3:21. T2 Mod, as described here:
viewtopic.php?t=395
This mod has made it into Classic and Hi Bands Schematic as "default", but I did not touch the Lo Bands Schematic since release. But I do suggest 3:21 for T2.
Nothing to worry about. Either way: You will end up with a working rig, if you wind according to any of those 2 Instructions. But you need to tweak filters either way:
https://www.youtube.com/watch?v=qN7hHsvcNMM
73 Manuel; DL2MAN
Re: Toroid information
Posted: 08 Dec 2022, 14:52
by Max
Thanks Manuel for your clarification