Hi > On Nov 27, 2014, at 5:59 PM, Jim Lux <jim...@earthlink.net> wrote: > > On 11/27/14, 3:10 PM, Gerhard Hoffmann wrote: >> 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. >> > > Analog Devices seems to use these for their various application circuits > Up to 3 GHz is the Mini-Circuits TC1-1-13. > From 3 GHz to 4 GHz is the Johanson Technology > 3600BL14M050. > From 4.9 GHz to 6 GHz is the Johanson Technology > 5400BL15B050.
For pre-wound parts, there are a number of outfits that will sell you sub $1 transformers. How well they work .. who knows. One example: http://www.digikey.com/product-detail/en/MABA-007159-000000/1465-1302-2-ND/4429718 There are other parts in the same series at similar prices. Don’t want to go for the 2K pc minimum order? Price roughly doubles. Bob > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.