Date   

Tool advice: contemporary oscilloscopes and Spectrum Analyzers

iz oos
 

Hi, a friend wants to replace his 30+Y old stuff. I said experienced hams use Rigol stuff, which good models would you suggest that do not cost a leg to be used with modern and vintage PA/rigs?


Re: Boy Scout activity event

Jeff WJ3FF
 

This sounds like a ton of fun!

How about a ham radio escape room? Make up a fictional scenario whereby the kids must assemble a radio station to call in a rescue or pass on secret spy intelligence, etc. Have the kids form small groups of 2-3 to work on the different parts, such as cutting the dipole, soldering the last couple parts on a Pixie kit, building a clothespin cw key, translating the mayday or spy message into Morse and sending it.

Alternatively, you could contrive a search and rescue game where you have people hiding in need of rescue, rescuers waiting for calls, cached resources such as food and medicine, etc.  The kids travel over the property and use the radios to coordinate the appropriate responses to each discovery. 

Now I’m all excited to create something like this in my area. Thanks for the inspiration!

Jeff, WJ3FF


Re: Apparent component swap in design and assembly of pc board v3 #ubitx-help

iz oos
 

Mine is like yours, injecting a signal of around S3 was clearly audible anyway, that swap does not jeopardise anything.


Il 07/nov/2018 03:05, "Howard Fidel" <sonic1@...> ha scritto:
Really? R37 and C32 are in series, so the order makes no difference, although the schematic is drawn incorrectly. Fix your schematic.

On 11/6/2018 8:38 PM, ce3afc@... wrote:
According to the schematic v3, capacitor C32 should be connected on one side to pin 2 (emitter) of Q32 and resistor R36 and the other side to R37.  In my board both components are swapped and so are the silk screened references.  Is this a general PC board design and assembly mistake or just my board.  Correction can be made unsoldering both components and swapping them again.  Just the wrong silk screened references will remain.  Any advice will be appreciated.  Thank you!



Re: the cause for the spurs, found!

ajparent1/KB1GMX <kb1gmx@...>
 

AndyH,

Yes rebias.

Allison


Re: the cause for the spurs, found!

ajparent1/KB1GMX <kb1gmx@...>
 

Sascha,

Have you checked the wiki and http://ubitx.net/ ?

Info in both places.

The bias at Q20 should not be about 6V.  It should be more like 9V.
Reason for this is the ideal bias is about 10mA and at 6V collector its more like
36ma and that's very high.    Also the two transistors (Q21,22) cause a 1.5V offset
and we want the emitter of Q22 at more than 4.5v (+-1 V).

Allison


Spectrum Analyzer: OWON XSA1015-TG Spectrum Analyzer

Kevin Luxford
 

Hi people,
With respect to measuring uBITX harmonics and spurs, has anyone had experience of the OWON XSA1015-TG Spectrum Analyzer?  Any comments?
Thanks in advance and 73.  Kevin VK3DAP / ZL2DAP.
 
 


Re: Boy Scout activity event

Anthony Luscre
 

If you are looking for a hands-on project I suggest the Clothespin Key-

I would also suggest sending them home with links to a variety of radio-related resources-
I would especially direct them to the Icom - Zack & Max Comic books and the online SDR for them listen to later (https://docs.google.com/document/d/1Nl2a7H57Ayu2lLjIASan6UfCkeXiV-Tw3SjBPIxlDrY/edit?usp=sharing)


On Wed, Nov 7, 2018 at 9:22 AM Art Olson <olson339@...> wrote:
I am looking for some ideas that can be used in a 30 minute window, or less, to introduce ham radio to a dozen scouts. My idea is to employ a few HTs in simplex mode, divide the the groups into 2 or 3 per team. Have each team search for something ( not defined) using the HTs and clues to where the something is located. Each team will have a licensed operator with them during the activity. Also this will be an evening event in a church activity building. Any ideas welcome. This is an opportunity to spark interest and get involved for the scouts.
73

Art N2AJO 



--
Anthony Luscre

K8ZT
Assistant Ohio Section Manager for Education Outreach
ARRL - The National Association For Amateur Radio™
 
a@... (best for Education & Technology)
k8zt@... (best for Amateur Radio)

The Web Resource Hoarder- www.ZTLearn.com
Web Resource Hoarder Blog

K8ZT Radio Website- www.k8zt.com
My Radio Blog- k8zt.blogspot.com



Re: Boy Scout activity event

Jack, W8TEE
 

This is how I got started in ham radio in 1954. We did a field trip to W8FTQ's QTH in Medina, OH, to hear his weekly schedule with his son...in SOUTH AFRICA!! The hook was set and I've been licensed ever since.

That was then...this is now.

My experience with HT's is that young kids today have cell phones and, more than once, I've been asked: "Why get a license when I can do the same thing on my cell phone?" I point out that with ham radio, you can control things yourself...you don't need a cell tower. I usually point out that the storm in Sandy Hook, NJ, took out every mode of communications except ham radios. In some cases, we were the only means of communication. Be prepared for similar questions.

Another issue I've mentioned before: Our club had a GOTO station at Field Day and we had a 13 year old who talked to a guy in CA and was so excited he could barely contain himself. After about an hour at the radio, his mother showed up and he literally burst telling her what he had just done. She said: "It looks like a wonderful hobby, but where are you going to get the thousands of dollars for the radio?" The boy looked like he had been shot.This is where I would drag out a µBITX, hold it up, and say: "Add a battery, a $20 antenna, $130, a license, and you can start talking to the world yourself."  I think a low-cost entry point is important to lawn-mowing budget (scout-aged) people and their parents.

Your planned activity is a great one and I'm sure they'll have fun doing it. That said, I would have some pictures of your rig at home and tell them that, with it, you have made friends and talked with people all over the world.

Now, if someone can just tell me how to sell learning CW to my club members, I'll die a happy camper. You'd be amazed how many people have to re-arrange their sock drawer on the very day I suggest for a CW class...

Jack, W8TEE

On Wednesday, November 7, 2018, 9:22:33 AM EST, Art Olson <olson339@...> wrote:


I am looking for some ideas that can be used in a 30 minute window, or less, to introduce ham radio to a dozen scouts. My idea is to employ a few HTs in simplex mode, divide the the groups into 2 or 3 per team. Have each team search for something ( not defined) using the HTs and clues to where the something is located. Each team will have a licensed operator with them during the activity. Also this will be an evening event in a church activity building. Any ideas welcome. This is an opportunity to spark interest and get involved for the scouts.
73

Art N2AJO 


Re: weak signal fun #ubitx

Joe Puma
 

Ahh the good DP0GVN station in the Antarctica. Looks like we reach the same stations abroad. 

The bands are not dead they’re  just not doing SSB :)

Joe



On Nov 7, 2018, at 12:37 AM, Marc Jones via Groups.Io <gw0wvl@...> wrote:

The Bands are far from dead .... People with damp shoelaces for antennas say they are ...


Gw0wvl


On Tue, 6 Nov 2018 at 19:25, Doug W
Last 24 hours on WSPR.  I guess nobody told my µBITX that the bands are dead.<Screenshot_2018_11_06 Map WSPRnet.png>
--
www.bitxmap.com
<Screenshot_2018_11_06 Map WSPRnet.png>


Boy Scout activity event

Art Olson
 

I am looking for some ideas that can be used in a 30 minute window, or less, to introduce ham radio to a dozen scouts. My idea is to employ a few HTs in simplex mode, divide the the groups into 2 or 3 per team. Have each team search for something ( not defined) using the HTs and clues to where the something is located. Each team will have a licensed operator with them during the activity. Also this will be an evening event in a church activity building. Any ideas welcome. This is an opportunity to spark interest and get involved for the scouts.
73

Art N2AJO 


Re: HF Signals still back ordering? #bitx40 #ubitx

Billy Shepherd <dis60cd@...>
 

Great news from HF Signals!!
I asked: If I order a BITX40 now when will it ship?
They replied: It will ship immediately

Order submitted. Thanks for all the replies. I will update here when it ships.


Re: µBITX: CAT connection

roger wincer
 

I have set mine up through the USB to work with N1MM logger Plus and it works just fine. As said before set it up as if it is an FT817 and it will do everything even the CW keying.
My uBitx is set up as radio number 2.

Presently I Am using Memory manager the new version 1.1 (I think) to set up, the WSPR beacon but cannot get the uBitx to load the settings I Have uploaded with the Manager.

Does anyone know how to do this?


Ubitx wiring harness pics

Prathap Naidu
 

Hi Gregory

Hope these pics may help in preparing the wiring harness to ease wiring & tracing

Happy homebrewing

best 73

Pop

VU2POP

 


Re: VK3YE AGC Not Doing It

Maior Alexandru
 

IT works ! nice AGC and simple

În mie., 7 nov. 2018 la 09:22, Timothy Fidler <engstr@...> a scris:

Curt this is if it is the circuit VK3zzz has been hawking about is  intended for  VOICE COMPRESSION. nothing to do with agc on line to speaker (though it could be used for same at a pinch)  . It is about a 50 year old circuit ,  just after valves stopped being used.   THere are specific voice compression types of cct about .. from PRC .. on a PCB.  They work  Others in the group have used them. I will try to send a PM on details.  They are even mentioned  on the ZL Bitx site ..


Re: VK3YE AGC Not Doing It

Mike Woods
 

On 7/11/18 8:21 PM, Timothy Fidler wrote:
Curt this is if it is the circuit VK3zzz has been hawking about is  intended for  VOICE COMPRESSION. nothing to do with agc on line to speaker (though it could be used for same at a pinch)  . It is about a 50 year old circuit ,  just after valves stopped being used.   THere are specific voice compression types of cct about .. from PRC .. on a PCB.  They work  Others in the group have used them. I will try to send a PM on details.  They are even mentioned  on the ZL Bitx site ..


--
Mike Woods
mhwoods@...


Re: VK3YE AGC Not Doing It

Timothy Fidler
 

Curt this is if it is the circuit VK3zzz has been hawking about is  intended for  VOICE COMPRESSION. nothing to do with agc on line to speaker (though it could be used for same at a pinch)  . It is about a 50 year old circuit ,  just after valves stopped being used.   THere are specific voice compression types of cct about .. from PRC .. on a PCB.  They work  Others in the group have used them. I will try to send a PM on details.  They are even mentioned  on the ZL Bitx site ..


Re: weak signal fun #ubitx

Ghericoan
 

People love to cry that the bands are dead, but do very little to make activity. Combine that with poorly built stations and folks who don't like to work for contacts or use digi modes, and thats what you get...

The bands aren't dead, things like WSPR and FT8 very much prove that. Just different conditions that require different tools.

data only phone, no call/txt
telegram @folfyshark


On Wed, Nov 7, 2018, 12:38 AM Marc Jones via Groups.Io, <gw0wvl=yahoo.co.uk@groups.io> wrote:
The Bands are far from dead .... People with damp shoelaces for antennas say they are ...


Gw0wvl


On Tue, 6 Nov 2018 at 19:25, Doug W
Last 24 hours on WSPR.  I guess nobody told my µBITX that the bands are dead.
--
www.bitxmap.com


--
----------
N5WLF, Greggory (or my nickname, Ghericoan)
General Class, Digital Radio Hobbyist


Ubitx wiring harness pics

Prathap Naidu
 

Hi Gregory

Hope these pics may help in preparing the wiring harness to ease wiring & tracing

Happy homebrewing

best 73

Pop

VU2POP

 


Re: weak signal fun #ubitx

Marc Jones
 

The Bands are far from dead .... People with damp shoelaces for antennas say they are ...


Gw0wvl


On Tue, 6 Nov 2018 at 19:25, Doug W
<dougwilner@...> wrote:
Last 24 hours on WSPR.  I guess nobody told my µBITX that the bands are dead.
--
www.bitxmap.com


oops....

Ruarto <rhgalyan@...>
 

OOPS     I went and looked,   I thought mine cost $135 but that was with a case and faceplate.

So, I would sell it for $90 plus freight,  no case (has my call sign on it).

 

 

 

Sent from Mail for Windows 10

 

From: Ruarto
Sent: Tuesday, November 6, 2018 1:18 PM
To: BITX20@groups.io
Subject: Re: [BITX20] HF Signals still back ordering? #bitx40 #ubitx

 

I do not know if mine is a 40 or what but I bought it about three months ago. I am not going to build it I am going to sell it.  


On Nov 6, 2018, at 1:12 PM, Billy Shepherd <dis60cd@...> wrote:

Hi folks. Was getting ready to order another Bitx40 and noticed that my order wouldn't ship until after December 25th. I guess I'm wondering if that is correct lol... thinking (hoping) that's a misprint.