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| To: | [email protected] |
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| Subject: | Re: LF: TXing 2200m WSPR |
| From: | N1BUG <[email protected]> |
| Date: | Sun, 24 Dec 2017 11:07:56 -0500 |
| In-reply-to: | <CAA8k23RghsUZT2-PSSg4Mr90D7WX5TvERuyZU3tjExUs=tzLTg@mail.gmail.com> |
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On 12/24/2017 07:40 AM, Andy Talbot wrote: Are you sure your 50uH choke is doing its job? No. I'm not sure of anything! I'm a HF/VHF/UHF and tube amplifier guy who decided to get on LF. Working with FETs and ferrite is all new to me. 9t to get 50uH suggests ferrite witout a gap. IN which case FDC thought the winding will be saturating the ferrite, driving it into non linearity and reduced LUse iron dust or GAPPED ferrite Yes, I am using ferrite without a gap. I have an iron dust T-106-2 core available but would have to use rather small enameled wire to get the required 61 turns for 50 uH, or else more than one layer of winding. I could temporarily borrow a T-157-26 core from another project. That would require only 23 turns which would easily fit being it's a rather large core. Unfortunately I now have a rather large amount of ice on the antenna and cannot do any more testing. It would appear this ice isn't going to melt for at least a week. :( 73, Paul N1BUG |
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