BCI Filter
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Joe Puma
开云体育This BCI filter seems to be doing a great job. I took mine out of the housing and took the sma connectors off the board to install it in the ubitx. ? ? ? ? ? ? Sent from for Windows 10 ? From: Jack Purdum via Groups.Io
Sent: Sunday, September 23, 2018 10:38 PM To: [email protected] Subject: Fw: Re: [BITX20] BCI Filter ? Opps...pressed the wrong key. Source listed below: ? ----- Forwarded Message ----- From: Jack Purdum <jjpurdum@...> To: "[email protected]" <[email protected]> Sent: Sunday, September 23, 2018, 10:36:21 PM EDT Subject: Re: [BITX20] BCI Filter ? A similar filter is discussed on the SoftwareControlledHamRadio groups.io Group ?
? site. Just do a? search on "BCI filter". It cost me under a dollar to build but works very well. A "high power" version of the filter appeared in: ? “A Cheap and Easy BCI Filter”, CQ Magazine, August, 2016. ? Jack, W8TEE ? ? On Sunday, September 23, 2018, 6:37:43 PM EDT, Nick VK4PP <nickpullen@...> wrote: ? ? Hi.? ? |
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My BC Interference filter is now permanently installed in my V4 uBitx. The response "Knee" is set to about 2.3 MHz. Most of the Rx birdies are now gone and I am still able to hear WWVH transmissions on 2.5MHz, quite clearly. Considering that it only took a few junk-box parts and about 20 minutes to construct, it was a very worthwhile investment. ? ? ? ? ? ? ? ? ?2000pF? ? ? ? ? ? ? ? ?820pF? ? ? ? ? ? ? ? ? 820pF? ? ? ? ? ? ? ? 2000pF ? ?>-----||-----.-----||-----.-----||-----.-----||-----< ? ? ? ? ? ? ? ? |? ? ? ? ? ? |? ? ? ? ? ? | ? ? ? ? ? ? ? ? E 2.2uH? ? ? E 2.2uH? ? ? E 2.2uH ? ? ? ? ? ? ? ? E? ? ? ? ? ? E? ? ? ? ? ? E ? ? ? ? ? ? ? ? |? ? ? ? ? ? |? ? ? ? ? ? | ? ? ? ? ? ? ? ?GND? ? ? ? ? GND? ? ? ? ? GND ? ?? 73's Ron? ? N7FTZ On Mon, Oct 1, 2018 at 10:18 PM Joe Puma <kd2nfc@...> wrote:
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Evidently it does a very good job removing overload due to some local MW broadcasters. Is the output power the same on all bands or do you experience some lower output power? Il 02/ott/2018 07:18, "Joe Puma" <kd2nfc@...> ha scritto:
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Joe Puma
开云体育This looks good. I don’t have a part inventory worth anything but that will change. Thanks for sharing.?Joe On Oct 2, 2018, at 2:31 AM, Dr. Flywheel <Dr.Flywheel@...> wrote:
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Joe Puma
开云体育So far 40 and 80 seems great. ?I haven’t been on 20 with it installed yet. I will check tomorrow in the day.Joe On Oct 2, 2018, at 2:45 AM, iz oos <and2oosiz2@...> wrote:
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