[Fourlanders] 25 ohm amp matching coax

[Bill Pence]

In the old mrfxxx ref designs from mot/freescale/nxp,
There is 25 ohm coax used for matching and coupling.

These are the low cost kits for 100 and 170 w 80 to 180 mhz popping up on
eBay


Does any one know where to get this 25 ohm coax?
Can it be made with 2x 50 ohm in parallel?
.
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