[SADXA] New Toys

[Ron Jones]

Do you know if there is a broadcast band notch so it could be used on the
new long wave bands? At  630 and 2200 meters? 

Ron K7RJ


-----Original Message-----
From: sadxa-bounces at mailman.qth.net [mailto:sadxa-bounces at mailman.qth.net]
On Behalf Of KC7ZON
Sent: Tuesday, October 08, 2019 11:01 AM
To: 'Southern AZ DX Association E-Mail Reflector'
Subject: Re: [SADXA] New Toys

I have 2 AM stations in the neighborhood. KUAZ 1550 KHz 50 KW daytime only,
3.4 miles away and KVOI 1030 KHz 10/1kw about 1 mile down the road. I can
see both towers at night.
On my 80-40 meter may pole I get -4 dBm on the 1030 Khz and -12.4 dBm at
night, and about +6.5 dBm on the 1500 Khz daylight hours.  This caused a lot
of problems with my MFJ antenna analyzer working on antennas during the day.
I use a Morgan systems (ICE) 400X BCB filter and also a MiniKits EME164,
changes out the 1000 pF caps to 470 pF.
https://www.minikits.com.au/electronic-kits/filter-kits/hf-highpass-filters/
HPF11-1M8.
Also adding about 10 dB of attenuation may help from overload.

-----Original Message-----
From: sadxa-bounces at mailman.qth.net [mailto:sadxa-bounces at mailman.qth.net]
On Behalf Of Wes
Sent: Sunday, October 06, 2019 14:47
To: SADXA
Subject: [SADXA] New Toys

Dick Solomon and I are both "time-nuts" and we each have acquired FA-2
frequency 
counters by BG7TBL. 
(https://www.ebay.com/itm/FA-2-1Hz-6GHz-Frequency-Counter-Kit-Frequency-Mete
r-Statistical-11-bits-s-topUS/183971992537?ssPageName=STRK%3AMEBIDX%3AIT&_tr
ksid=p2057872.m2749.l2649) 
These tiny little boxes are amazingly accurate counters.

I adjusted mine after day of warmup using a GPSDO for a test signal and it's

holding accuracy of a few milli-Hertz.  It will also accept an external 
reference which can be the GPSDO for near perfection.  Remarkable for under 
$120.00.  They do speak (Chinese) over USB and some other time-nuts are
learning 
how to gather data.

That's the good news.  The bad is that I acquired an Airspy HF+ Discovery
SDR 
back in August.  Like the RSP2 Pro before it, it folded up like a cheap
suitcase 
in the presence of the BC stations I hear out here.  Unlike HRO who said,
"Send 
it back" when I reported the problem with the RSP, Airspy tried to ignore
me.  
Bad idea.

Eventually I got their attention and thus began a month long back and forth
with 
me providing measurements and screen shots and them blaming me for the
problem 
and asking for more data.  I came to believe that there was a problem with
the 
input BPFs either in hardware or firmware.  I finally sent it back and asked
for 
replacement or refund.  They clammed up so I initiated a Paypal dispute.
Even 
this took some time to get their attention, but the last word is that a 
replacement is on the way.  At least I have a USPS tracking number.  I hope 
something is in the box and it isn't the old one when it arrives.

This is a strange operation.  As best as I can determine, a couple of guys
in 
Morocco designed the hardware and software (SDR#) and have them produced in 
China.  The US rep is likely a one-man shop (I'm guessing).  There is no
manual, 
you are advised to use the SDR# groups.io site.  There if you express dismay

that there is no manual, as some have done, you are berated and told to buck
it 
up and just dive in and educate yourself.  If you try to post any pointed 
questions or bug reports as I have, the moderator directs your message to
the 
electronic version of the round file.

Wes

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