[TangerineSDR] Notes from PSWS / TangerineSDR call of 12-02-2019

[Phil Erickson]

Hi all,

  Sorry that I was not able to join the call last night.

1. Receiver: 40 MHz LPF filter is preferred by the group. The loss at 6M is
> a little higher, but likely will need an LNA for 6M use anyway, so that may
> not matter. The nearby-above-61 MHz loss is better with the 40 MHz filter.
> Also include jumpers for power and ground bonding and for use by some
> future low-noise amplifier.
>

 One point not brought up in this sentence:  the phase response of the LPF
above its cutoff will not necessarily be linear.  Was that discussed?  It
might impact any use at 50 MHz, or at the least would require careful
calibration if it were to be used there.

73
Phil W1PJE



On Mon, Dec 2, 2019 at 10:11 PM Tom McDermott via TangerineSDR <
tangerinesdr at lists.tapr.org> wrote:

>
> Notes from PSWS / TangerineSDR call of 12-02-2019
>
> 1. Receiver: 40 MHz LPF filter is preferred by the group. The loss at 6M
> is a little higher, but likely will need an LNA for 6M use anyway, so that
> may not matter. The nearby-above-61 MHz loss is better with the 40 MHz
> filter. Also include jumpers for power and ground bonding and for use by
> some future low-noise amplifier.
>
> 2. Dave W. recommends putting pads for a low cost I2C temperature sensor
> on the magnetometer module just in case the PNI-3000 has temperature
> sensitivity and needs compensation. Scotty recommends adding a strap to one
> of the temperature sensor address lines so that sensors on the local and
> remote ends can be separately addressable.
>
> 3. We currently do not have a logo for the Personal Space Weather Station.
> Would such be useful? Dave L., Scotty, and Nathaniel will add some material
> to the tangerinesdr.com webpage tying the various parts of the project
> together.
>
> -- Tom, N5EG
>
> --
> TangerineSDR mailing list
> TangerineSDR at lists.tapr.org
> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>


-- 
----
Phil Erickson
phil.erickson at gmail.com
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