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Date Posted by Category User IP

2013-01-18 (UTC)

AC0DS

Filters

PAR BCST-HPF BCB High Pass Filter + Homebrew LP fi

In the process of deactivating my shack
and lab, I have for sale a PAR BCST-HPF
filter in mint condition. This is a very
high performance Broadcast band
rejection filter useful for eliminating BCB
interference from the amateur bands.
Sophisticated 7 pole elliptical design with
very sharp cutoff and rejection from 40 to
80 dB across the BCB. 50 ohm
impedance. Fully shielded 2.5 x 2.25 inch
enclosure with female BNC connectors.
Switch for bypassing filter if desired. High
quality design and construction by Dale
W4OP, using toroidial inductors and poly
capacitors. Includes original datasheet
with plot of actual filter performance.

I am also including a homebrew Low Pass
filter. This filter has a cutoff of 1.5 MHz
and is useful for eliminating HF
interference for BCB or lower reception or
for elimination of BCB receiver local
oscillator injection into the antenna
system. The actual filter is a Coilcraft
P7LP-155L, which is constructed on a
ceramic substrate with SMT capacitors
and inductors. It is a 50 ohm 7 pole
design with rejection of about 60 dB. Iíve
enclosed it in a fully shielded Pomona box
with female BNC connectors.

These are both low power receive-only
type filters.

Price is $70 including USPS Priority Mail
shipping to your USA address.

PayPal only, please. Contact me directly
via email if interested:
craig@powersmith.net

73 Craig AC0DS

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