replacing the RX filter with a balun on the c139
jl at thre.at
Fri May 27 02:58:13 UTC 2011
Quoting 246tnt at gmail.com (246tnt at gmail.com):
> >(As an aside, the baluns that Sylvain chose aren't perfect for the US
> >frequency range, but they should work okay.)
> The hi band one if the one recommended for both PCS and DCS.
> For the low band it's indeed E-GSM but the graphs are virtually flat,
> insertion loss varies by less than 0.5 dB. Return losses are a bit higher
> but I doubt that it matters much.
Yes, not "baluns" but "balun". The HHM1523C1 E-GSM side balun is
slightly better in the 900 band. It looks like the HHM1523B3 is
exactly the same balun with the same pin-out except slightly favoring
the GSM-850 range.
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