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Weather Station Hardware => Blitzortung => Topic started by: Jumpin Joe on September 13, 2013, 10:35:02 PM

Title: Red Help
Post by: Jumpin Joe on September 13, 2013, 10:35:02 PM

I am assembling the Controller Board and cannot tell where the identified pin for RN41 goes. Does the identified pin on the first one go next to where RN41 is printed on the board? Does the identified pin for the second one go next the the first one or at the opposite end?  ](*,)

Title: Re: Red Help
Post by: Maumelle Weather on September 13, 2013, 11:05:39 PM

Hi Joe,

I lined both of those with Pin 1(has a dot or star) from left to right. Left being towards C45.

Hope that helps,

John

Title: Re: Red Help
Post by: Jumpin Joe on September 14, 2013, 06:48:17 AM

Thank you John

Title: Re: Red Help
Post by: dfroula on September 14, 2013, 08:28:44 AM

The two RN41 components are symmetrical, so it doesn't matter which way the dots on either component point. However, I did what John suggested as well.

The other resistor networks must be oriented correctly.

Don

Title: Re: Red Help
Post by: Jumpin Joe on September 14, 2013, 11:09:12 AM

Thanks Don

ran into a sag broke one of the 100nf caps.... got to order a replacement.

Joe

Title: Re: Red Help
Post by: safuser on May 09, 2021, 12:24:35 PM

RN41 replacement.  Does anyone know the correct replacement part for Red PCB 10.5 RN41?

Would  2 x Bourns 4606X-102-102LF (Mouser 652-4606X-2LF-1K ) be the correct replacement?

or could I use 1 x Bourns 4612X-102-102LF (Mouser 652-4612X-2LF-1K )

Thanks in advance!...

Title: Re: Red Help
Post by: Cutty Sark Sailor on May 10, 2021, 09:12:40 AM

Yep, rather important network, coupling channel signals to processing.(https://frankfortweather.us/blitzblitz/rn41.png)
Your choice. 2 six pins (4606) or one 12 pin (4612).  Many production runs used 2 six pin (4606). As much as there are three possible channels on both H and E inputs, a 4606 rather separates the two amplifier boards, and perhaps a few cents difference in production, and / or availability of 4612 vrs 4606 during production. I personally think I'd opt for the 4612 ... but it won't make a quantum's difference in operation. I wouldn't attempt to use any form of discrete components, because of added capacitance, etc potentially affecting the time response, though virtually all of the filtering is done, in red, on the amplifier boards.
Mike

Title: Re: Red Help
Post by: safuser on May 10, 2021, 09:26:37 AM

Rgr.  Thanks for the info!!  Just wanted to make sure as I was having a little trouble decoding the schematics form the board files I was sent me.  Attempting to get a BOM together or parts available from US suppliers for a build.