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Date

Re: VK3YE AGC Not Doing It

Timothy Fidler
 

http://ubitx.net/mod-tx-compression/
?
SSM 2167 for microphone compression.
?
?
Could work as a type of AGC too..
?


Re: Boy Scout activity event

 

What games can I play on it?? ? ;-)

All kidding aside, Doug's right.? Need to figure out what they are interested in.
Though they may not know they'll be interested in something
if they have never heard, seen, or smelled it.
(A KW tube rig smells of frying dust and a hint of ozone, which might be novel.)

Maybe have a half dozen different things to expose them to briefly,
then go back and spend more time on whatever it is that they show interest in.

Jerry


On Wed, Nov 7, 2018 at 09:47 AM, Doug W wrote:
What about taking some of these ideas and asking a few of the kids what they think?


Re: Boy Scout activity event

 

Can you talk to one or more of the scouts before the event?? The easiest way to connect with your audience is to know your audience and what matters to them.? There are several ideas already in this thread that sound like good ideas to me.? The problem is, I am willing to bet I am one of the younger people reading this and the last time I wore a neckerchief was around the time we were huddled around the TV watching the first space shuttle launch so what I think is interesting doesn't really matter.? What about taking some of these ideas and asking a few of the kids what they think?
--


Re: Boy Scout activity event

Martin KM6TCD
 

Get them to make a tape measure beam antenna, then send them on a hunt.
?
Sent:?Wednesday, November 07, 2018 at 6:22 AM
From:?"Art Olson" <olson339@...>
To:[email protected]
Subject:?[BITX20] Boy Scout activity event
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: Boy Scout activity event

 

And let him listen to the static where your FT8 receiver is somehow picking out a weak station.
Being able to communicate across a few thousand miles on a few AA cells is pretty amazing.

Be ready to show them how many cell towers are in the area, and how close they have to be.


On Wed, Nov 7, 2018 at 08:28 AM, James Lynes wrote:
Maybe also set up a low cost uBitx based demo FT8 station. This is the texting generation after all.
?
James
?

?

On Wed, Nov 7, 2018 at 08:28 AM, James Lynes wrote:
Maybe also set up a low cost uBitx based demo FT8 station. This is the texting generation after all.


Re: Tool advice: contemporary oscilloscopes and Spectrum Analyzers

 

Here's a post in a thread that's possibly of interest on scopes, over on a different forum:
? ??/g/QRPLabs/message/27896

Siglent, Rigol, Hantek, are good places to start for low cost new gear.
But you don't necessarily want to buy from the lowest bidder,
there are differences that make the cheapest ones cheap.?
Competition is pretty fierce now, and there are corners getting cut that are not obvious from their adverts.

I've got a Rigol DS1052E, bought a few years back when $400 for a 50mhz BW scope was quite the deal.
Especially since this particular scope can do 100mhz if loaded with firmware for their 100mhz scope..?
I'm not aware of any other scope for which a firmware upgrade removes a marketing gimmick like that,
some people seem to assume it's true of all the new DSO's.
I may need to upgrade, a 200mhz BW scope is now cheaper than what I paid for this thing.?

But take a hard look at that 30+ year old stuff.
Many folks prefer a good analog scope over the new wiz-bang DSO's.

I've never had a spectrum analyzer, perhaps someone else can speak to that.
I see lots of Rigol's getting used to poke at the uBitx here in the forum.
And a few brave souls who have built the W7ZOI Spectrum Analyzer,
or variants thereof such as Farhan's specan.?

Check out? ?/g/HBTE? if interested in homebrew test gear.
It spun off of this Bitx20 group when folks here got tired of all the non-Bitx traffic.

Jerry, KE7ER



On Wed, Nov 7, 2018 at 07:50 AM, iz oos wrote:
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: VK3YE AGC Not Doing It

 

QSL OM Maior

can you provide tips on photo-resistor parameters, type of LED, or anything else I should ask ?? is your AGC installed into a uBITX between the board and the volume control??

I get illumination of the LED - but no useful AGC.?

73 Curt


Re: Boy Scout activity event

Jack Purdum
 

Great idea! Then, after a contact with some distant station, he could point to it and state that the rig costs less than $150 to set up. Or say: "Mow my lawn 6 times and I'll give you the station!" I think emphasizing the low cost is important to them.

Jack, W8TEE


On Wednesday, November 7, 2018, 11:28:35 AM EST, James Lynes <jmlynesjr@...> wrote:


Maybe also set up a low cost uBitx based demo FT8 station. This is the texting generation after all.

James


Re: Boy Scout activity event

James Lynes
 

Maybe also set up a low cost uBitx based demo FT8 station. This is the texting generation after all.

James


Re: weak signal fun #ubitx

James Lynes
 

As far as SWLing is concerned,? my ZZRX-40 DC receiver with Raduino VFO and indoor wire has recently pulled in multiple SSB stations from Hawaii and South Africa from Central Florida.?

James


Re: Boy Scout activity event

 

¿ªÔÆÌåÓý

As old school as this might sound, I always found having the scouts visit a shack during the day and letting them experience (or just listen) working 20-meter dx with equipment humming and beams aturning worked really well. Contests with pile ups and stations on the Black Sea always produced ooohs and ahhhs.? I showed them stuff you can't do with a cell phone and homebrew equipment like amps with tubes afire was a nice touch.
Pat AA4PG

http://www.cahabatechnology.com/aa4pg.html


From: [email protected] <[email protected]> on behalf of Jeff@... <Jeff@...>
Sent: Wednesday, November 7, 2018 9:48 AM
To: [email protected]
Subject: Re: [BITX20] Boy Scout activity event
?
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: Boy Scout activity event

 

¿ªÔÆÌåÓý

Wonderful... scouts and spies... all kids must learn Morse Code at certain point of their progression. They play with it using flashlights, why not use the real thing, introduce them to CW.

Heinz, OA4DPH


On 07/11/2018 10:48, Jeff@... wrote:

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


Tool advice: contemporary oscilloscopes and Spectrum Analyzers

 

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

 

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

 

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!

 

AndyH,

Yes rebias.

Allison


Re: the cause for the spurs, found!

 

Sascha,

Have you checked the wiki and???

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

 

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

 

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 ()


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?



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Anthony Luscre

K8ZT
Assistant Ohio Section Manager for Education Outreach
ARRL - The National Association For Amateur Radio?
?
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Re: Boy Scout activity event

Jack Purdum
 

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 ?BITX, 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?