Hi John. That UNUN appears to have very good performance without the need for a capacitor across the primary as used in many commercial units. That implies to me that it has relatively low leakage inductances. It would be interesting to measure relative coupling from primary to secondary by measuring primary inductance of the UNUN with secondary open and then measure primary inductance again with the secondary shorted. From that, a lot of data can be derived.
Thanks,
Steve K1RF
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-----Original Message-----
From: John KN5L
Sent: Tuesday, May 21, 2019 7:08 AM
To:
[email protected]Subject: Re: [qrp-tech] KN5L EFHW Unun
Hi Allison
On 5/20/19 8:24 PM, ajparent1/kb1gmx wrote:
Also did you actually test the unun with a real antenna?
Look under the title: "Antenna Measurement."
John KN5L
