SBARC-list November 2020

sbarc-list@lists.netlojix.com

6 participants
6 discussions

Sunspot Cycle 25 could have a magnitude that rivals the top few since records began
by Bob Bascom 21 Nov '20

21 Nov '20

Here's some good news: A research paper https://arxiv.org/pdf/2006.15263.pdf , "Overlapping Magnetic Activity Cycles and the Sunspot Number: Forecasting Sunspot Cycle 25 Amplitude," by Scott W. McIntosh, Deputy Director of the National Center for Atmospheric Research in Boulder, et al., has concluded that Solar Cycle 25 could be among the strongest sunspot cycles ever observed, and will almost certainly be stronger than the just-ended Solar Cycle 24 (sunspot number of 116). The scientists say it will also most likely be stronger than Solar Cycle 23 (sunspot number of 180) "Recent observationally-motivated studies have illustrated a relationship between the Suns 22-year (Hale) magnetic cycle and the production of the sunspot cycle landmarks and patterns, but not the amplitude of the sunspot cycle. Using (discrete) Hilbert transforms on more than 270 years of (monthly) sunspot numbers we robustly identify the so-called termination events that mark the end of the previous 11-yr sunspot cycle, the enhancement/acceleration of the present cycle, and the end of 22-yr magnetic activity cycles. Using these we extract a relationship between the temporal spacing of terminators and the magnitude of sunspot cycles. Given this relationship and our prediction of a terminator event in 2020, we deduce that Sunspot Cycle 25 could have a magnitude that rivals the top few since records began. This outcome would be in stark contrast to the community consensus estimate of sunspot cycle 25 magnitude."

1 0

Power Supply
by Nick Shearer 13 Nov '20

13 Nov '20

Hey there, wanted to see if anyone has an old Power Supply I could purchase from them. Trying to program a mobile but would love to do it off my home computer instead of a laptop and in the vehicle. Thanks ahead of time!

1 0

Veterans Day
by Bill Talanian 09 Nov '20

09 Nov '20

1 0

Re: [Sbarc-list] SBARC-list Digest, Vol 206, Issue 4
by Michael Wapner 08 Nov '20

08 Nov '20

Hi Dave - I currently have multiple Yaesu VHF/UHF radios in-use & “have had” others over the past years; I've never had a noise issue as described with any. This said, I’ve never had a FTM-7250DR. GL es 73 de Mike K6QD > On Nov 7, 2020, at 12:00 PM, sbarc-list-request(a)lists.netlojix.com wrote: > > Send SBARC-list mailing list submissions to > sbarc-list(a)lists.netlojix.com > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.netlojix.com/mailman/listinfo/sbarc-list > or, via email, send a message with subject or body 'help' to > sbarc-list-request(a)lists.netlojix.com > > You can reach the person managing the list at > sbarc-list-owner(a)lists.netlojix.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of SBARC-list digest..." > > > Today's Topics: > > 1. Re: Dual band Yaesu mobile users - does this sound normal? > (Dave Schmidt) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 6 Nov 2020 21:34:16 -0800 > From: Dave Schmidt <dgschmidt(a)gmail.com> > To: "List, SBARC" <sbarc-list(a)lists.netlojix.com> > Subject: Re: [Sbarc-list] Dual band Yaesu mobile users - does this > sound normal? > Message-ID: > <CAD1xK9T4+OfbR6TmnPgdF6acddHVWAuhBFLtG6SniF0BpWbDrA(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > More info on my new FTM-7250DR. Before I left from work on Weds, and > before starting the truck, I compared the squelch settings on the Yaesu > across its receive bands (it has a wide frequency receiver). Only the VHF > ham band needed substantially more squelch than the other bands (you'll see > this in the video). Next I tried my Kenwood TM-281 VHF only radio - it was > happy with just 1 click of squelch. > > I had sent a note to Yaesu tech support asking 'is this normal' and they > got back to me today with "No, doesn't sound like it. Send it in". I then > sent the video and asked "after watching this, are you still sure it's not > working right?" Their reply was "thanks for the video, it helped. > Sensitivity sounds good but indeed your squelch could be helped with a > re-alignment. Go ahead and send it in." > > Tomorrow I'm getting together with Denney (VCARC president) as he has the > same radio and we're going to compare mine to his, but regardless I'm going > to go ahead and send it in hoping they can make it behave like I think it > should. > > Here's the demo video. > https://youtu.be/5ga4ieRChmk > > Dave > ai6vx >

2 1

Dual band Yaesu mobile users - does this sound normal?
by Dave Schmidt 07 Nov '20

07 Nov '20

Question for the group - I have a new Yaesu FTM-7250DR dual band mobile rig and I'm questioning whether what I'm about to describe is normal for a Yaesu. The squelch level required to turn off the audio is very high but only on VHF freqs. Range is 0-15 and I need to set it to 9 for VHF freqs and only 1 for UHF. This is very different than my Kenwood TM-281A, and my Anytone 77UV, both of which squelch level 1 is sufficient. This is with the same antenna (Tram 1480 base antenna), coax (LMR400) and power supply (Astron 35A linear). I can swap them back and forth and only the Yaesu needs a high squelch. I know I'm probably the only one with the 7250DR, but is this also seen on the 100, 300 and 400 radios? Thanks for your input. Dave AI6VX

2 5

MRHS newsletter No.66
by Bill Talanian 01 Nov '20

01 Nov '20

1 0

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

SBARC-list November 2020