Re: QDX Surface Mount inductors
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Hello Andrew
You asked:
"Hans, what was the original manufacture part number of the inductors you were using?"
I am attaching to this post, a photograph of the SMD reel label. So that should answer your question...?
Before any smart person notices that the date code is 2020-09-08 which is AFTER I manufactured the QDX kits (around January 2020)... yes, that is because this is the current reel of 3000pcs of this inductor that we are using. We are also using the reel for other kit manufacturing too such as the QCX-mini. But it's always the same supplier and the same part number as shown on this photo.?
73 Hans G0UPL
On Thu, Nov 4, 2021 at 4:25 PM Andrew Lenton < a@...> wrote: Hi all,
Thanks for your responses, I do have have a number of spectrum analysers, and I have a surface mount work station, I can remove the inductors with a hot air pencil, and fit different ones with ease. After I have built the kit with originals parts, I will measure the harmonic content, let's assume the power is 37dBm, then 60dBc would be -23dBm (25mW), I would like to see harmonic content -36dBm (250nW), or -54dBm (3.98nW), this may be a tall order?
I have HF coupler and some high pass filters and HF notches, for HF so can make the measurements. What spec are we supposed to meet?
Yaesu FTDX 10 is quoted at -50dBc for 100 Watts! on HF!
Hans, what was the original manufacture part number of the inductors you were using? I would like to look up the spec sheet.
RF design, does have a tendency to bite you!. all part of the fun
73 G8UUG
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