Am 27.11.2014 um 23:30 schrieb Bob Camp:
Hi
Finding the RF transformer parts is still a bit of a challenge.
No. These work quite good for me:
CX2074 4:1 CT
CX2147 1:1 CT
<
http://www.digikey.de/product-search/de/rf-if-and-rfid/balun/3539019?k=cx2074
>
The 1:1 is optimum for the NIST doubler at the sources, btw.
The 4:1 as an autotransformer 9:1 at the drains. (2*BF862).
Gives you 13 dBm @ 2f for 13 dBm in at 1f upto 40 MHz in.
Still searching a good balun xformer for 800 MHz in.--> 1600 out.
regards, Gerhard
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