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Re: Thoughts on a Ham Bus

 

From Paul VK3HN.:

"So the best I can imagine is a pseudo 'Hambus'. with control lines on the bus and signal interconnections not on the bus"

To me, this seems like the one idea that has some traction.?

Dennis KG4RUL??
Re: Understanding Spurious Emissions

 

No, your analogy would be right if you were on the wrong side of the road.?
If you get near even fully driving the modulator the last mixer is easily 10+ db
past saturated as result of there being enough IF gain to assure that.

For those that never go above 20Mhz its adequately filtered and not an issue.

Allison
Re: experience with Sunil VU3SUA's enclosures #ubitx

 

A week after I ordered my case with DHL shipping, I contacted Sunil to find out when I could expect the case. He told me that it had not shipped. At five weeks, I emailed him again and he said it had gone out that day. I received it 6 weeks after I ordered. I was not so concerned as I did not have the time to build up to that point. Sunil responded to my emails and I received my kit. The goodies that come with it are quite nice. I would suggest a bit more patience. I have no qualms about ordering from him again.
AF5RX Scott.


On Fri, Jun 22, 2018 at 12:53 AM, WA9PWR
<bill@...> wrote:
I ordered one 4/6/2018 and received it in I think very roughly a month.
73, Bill WA9PWR

Re: Audio feedback during transmit? #ubitx

 

I also have the ND6T modification in my radio, but after redoing the calibration and BFO setting, no longer have the issue.? I suppose one could add a small 5 volt relay and disable the AGC while transmitting.
Your mileage may vary,
Jim W0CHL
Re: Rx Radio #ubitx-help

 

Sridhar,

Your question is "how to receive broadcast AM stations".

Without mods, you can carefully tune the station till the audio sounds clear. As the xtal filter is narrow
the sound will not be as good as a normal radio.

Raj

At 22/06/2018, you wrote:

But my question i in UBITX set how can i receive SW frequency 3 to 30 Mhz Stations ? for got the antenna which i am feeding i had many options to feed the antenna

de
vu3pen
sridhar
Re: Rx Radio #ubitx-help

 

thx for valuable suggestions , i am also using the wire? antenna to? receive SW RX? ,? 40 feet on AIR , then 40 vertical means total 80 feet is using , the wire is normal AC wire used for the house internal wring , for the same wire if i put 12 band normal radio , the audio is coming .
(I will try with 58 feet also in air later )

But my question i in UBITX set how can i receive SW? frequency 3 to 30 Mhz Stations ? for got the antenna which i am feeding i had many options to feed the antenna?

de?
vu3pen
sridhar
Re: Rx Radio #ubitx-help

 

You might also opt for a 9:1unun for HF (450:50ohm) and a random wire which are inexpensive and easier than a tuner. The wire can be put along a fiberglass fishing rod or put as a sloper if you use a tree or another support.


Il 22/giu/2018 12:19, "Mike aka KC2WVB" <rb5363@...> ha scritto:
One last thing. The length of wire I mentioned comes from someone that spent a lot of time analyzing this type of antenna and 58 feet is one of many lengths that avoid being equal to a half wave on any of the HF bands. Therefore in theory it will tune to any band you want to listen to. I chose 58 feet because of space limitations but there are other lengths that would work well too. Additionally my antenna rises 17 feet before making the right angle bend because of practical concerns and from listening as a measure of effectiveness it was a good choice perhaps because it receives well signals that are vertically polarized or horizontally polarized.

On Fri, Jun 22, 2018, 5:56 AM Mike aka KC2WVB <rb5363@...> wrote:
The tuner I mentioned is actually a MFJ 16010 not 1600 as I initially indicated. It is very inexpensive and probably no more than $60. This type of tuner is easy to build if your so inclined. It only requires a variable capacitor and a hand wound inductor, coil, with taps spaced along its length. The taps and the variable capacitor adjust this LC circuit to match the signal of interest.?

On Fri, Jun 22, 2018, 5:40 AM R. Michael Boyer <rb5363@...> wrote:
OK, Sure you can listen to what you refer to as normal Shortwave because the radio's reciever covers the entire High Frequency spectrum. You will need an antenna system that allows you to tune the section of the spectrum your interested in listening to and adjust its tuning as you slide up or down the band. A 58 foot piece of wire that runs vertically for 17 feet before it bends at a right angle for the rest of its length coupled to a inexpensive MFJ 1600 long wire tuner works extremely well when the tuner and reciever are grounded to something like a cold water pipe.

The AM stations will sound a bit weird at first because if your not right on their carrier frequency the difference is heard as a high pitched tone that progressively becomes lower and goes to zero as you adjust the tuner on your reciever to match the AM broadcaster's carrier frequency. Since many broadcast AM with a side band to the left of the carrier and to the right of the carrier you will here the change in tone as you approach the carrier frequency from either end.?

Lastly, the reciever tunes well below the HF region into and below the AM commercial broadcast band. You can listen here too. Here I 'd recommend using a simple to make magnetic loop antenna because the frequency length of the associated stations in this area of the spectrum are so long that long wire antennas that will receive their signal are impractical to put in place.

Have fun, I do more listening then transmitting and what I described is what I am using with darn good success.

On Fri, Jun 22, 2018, 4:43 AM sridhar <vu3pen@...> wrote:
I had ubitx ,currently using for RX Only ,its my first HF set ,Ubitx having 3 Mhz to? 30 Mhz Frequency ,
1)Can i use this for Normal Radio RX i.e SW , i am able here radio but audio is not able to recognize.?
2)? what changes do need to do in this set to added any component to get full audio from SW frequency?



de?
vu3pen
sridhar?

Re: Rx Radio #ubitx-help

Mike aka KC2WVB
 

One last thing. The length of wire I mentioned comes from someone that spent a lot of time analyzing this type of antenna and 58 feet is one of many lengths that avoid being equal to a half wave on any of the HF bands. Therefore in theory it will tune to any band you want to listen to. I chose 58 feet because of space limitations but there are other lengths that would work well too. Additionally my antenna rises 17 feet before making the right angle bend because of practical concerns and from listening as a measure of effectiveness it was a good choice perhaps because it receives well signals that are vertically polarized or horizontally polarized.


On Fri, Jun 22, 2018, 5:56 AM Mike aka KC2WVB <rb5363@...> wrote:
The tuner I mentioned is actually a MFJ 16010 not 1600 as I initially indicated. It is very inexpensive and probably no more than $60. This type of tuner is easy to build if your so inclined. It only requires a variable capacitor and a hand wound inductor, coil, with taps spaced along its length. The taps and the variable capacitor adjust this LC circuit to match the signal of interest.?

On Fri, Jun 22, 2018, 5:40 AM R. Michael Boyer <rb5363@...> wrote:
OK, Sure you can listen to what you refer to as normal Shortwave because the radio's reciever covers the entire High Frequency spectrum. You will need an antenna system that allows you to tune the section of the spectrum your interested in listening to and adjust its tuning as you slide up or down the band. A 58 foot piece of wire that runs vertically for 17 feet before it bends at a right angle for the rest of its length coupled to a inexpensive MFJ 1600 long wire tuner works extremely well when the tuner and reciever are grounded to something like a cold water pipe.

The AM stations will sound a bit weird at first because if your not right on their carrier frequency the difference is heard as a high pitched tone that progressively becomes lower and goes to zero as you adjust the tuner on your reciever to match the AM broadcaster's carrier frequency. Since many broadcast AM with a side band to the left of the carrier and to the right of the carrier you will here the change in tone as you approach the carrier frequency from either end.?

Lastly, the reciever tunes well below the HF region into and below the AM commercial broadcast band. You can listen here too. Here I 'd recommend using a simple to make magnetic loop antenna because the frequency length of the associated stations in this area of the spectrum are so long that long wire antennas that will receive their signal are impractical to put in place.

Have fun, I do more listening then transmitting and what I described is what I am using with darn good success.

On Fri, Jun 22, 2018, 4:43 AM sridhar <vu3pen@...> wrote:
I had ubitx ,currently using for RX Only ,its my first HF set ,Ubitx having 3 Mhz to? 30 Mhz Frequency ,
1)Can i use this for Normal Radio RX i.e SW , i am able here radio but audio is not able to recognize.?
2)? what changes do need to do in this set to added any component to get full audio from SW frequency?



de?
vu3pen
sridhar?

Re: Homebrew from scratch #ubitx

 

Hi !

I always use modules bitx applications :
BITX20 old version for 40m? and the first made :


Multi band VFO:


Ladder filter how to do (there are others articles about ladder filters in the page) :


SI5351 shield


For to go to my home page :


for to watch the full articles (183) click in receivers transmitters transceivers link.

73 from py2ohh miguel
Re: Rx Radio #ubitx-help

Mike aka KC2WVB
 

The tuner I mentioned is actually a MFJ 16010 not 1600 as I initially indicated. It is very inexpensive and probably no more than $60. This type of tuner is easy to build if your so inclined. It only requires a variable capacitor and a hand wound inductor, coil, with taps spaced along its length. The taps and the variable capacitor adjust this LC circuit to match the signal of interest.?


On Fri, Jun 22, 2018, 5:40 AM R. Michael Boyer <rb5363@...> wrote:
OK, Sure you can listen to what you refer to as normal Shortwave because the radio's reciever covers the entire High Frequency spectrum. You will need an antenna system that allows you to tune the section of the spectrum your interested in listening to and adjust its tuning as you slide up or down the band. A 58 foot piece of wire that runs vertically for 17 feet before it bends at a right angle for the rest of its length coupled to a inexpensive MFJ 1600 long wire tuner works extremely well when the tuner and reciever are grounded to something like a cold water pipe.

The AM stations will sound a bit weird at first because if your not right on their carrier frequency the difference is heard as a high pitched tone that progressively becomes lower and goes to zero as you adjust the tuner on your reciever to match the AM broadcaster's carrier frequency. Since many broadcast AM with a side band to the left of the carrier and to the right of the carrier you will here the change in tone as you approach the carrier frequency from either end.?

Lastly, the reciever tunes well below the HF region into and below the AM commercial broadcast band. You can listen here too. Here I 'd recommend using a simple to make magnetic loop antenna because the frequency length of the associated stations in this area of the spectrum are so long that long wire antennas that will receive their signal are impractical to put in place.

Have fun, I do more listening then transmitting and what I described is what I am using with darn good success.

On Fri, Jun 22, 2018, 4:43 AM sridhar <vu3pen@...> wrote:
I had ubitx ,currently using for RX Only ,its my first HF set ,Ubitx having 3 Mhz to? 30 Mhz Frequency ,
1)Can i use this for Normal Radio RX i.e SW , i am able here radio but audio is not able to recognize.?
2)? what changes do need to do in this set to added any component to get full audio from SW frequency?



de?
vu3pen
sridhar?

Re: uBITX Version 4 first attempt #ubitx-help #ubitx

David Wilcox
 

¿ªÔÆÌåÓý

Very interesting and humorous.

The DHL driver I talked to comes from a base 150 miles away and sometimes for only one or two packages. ?He hates the companies that require a signature and told me he is glad Farhan's company does not require that. ?Very jolly guy and we had a good talk. ?I live in Traverse City, Michigan and his base is near Grand Rapids.

Dave K8WPE

On Jun 21, 2018, at 10:21 AM, Gwen Patton <ardrhi@...> wrote:

I really can¡¯t see how they can be packed any better. I have not heard of anyone who has received their bitx damaged until yours. That it just real poor luck.?
As Carl said, this kit was packed incredibly well. I was surprised to see the plastic box inside the package, to be honest. I've ordered a LOT of stuff from overseas, including all too much stuff that arrived on a slow boat from China, and some of the most fragile stuff was packed in a wad of bubble-wrap in a plastic bag, not even a cardboard box! I got a charger for rechargeable lithium coin cells that took a month to arrive on a boat, and it was just the thin cardboard RETAIL box inside one of those black and white plastic overwrap bags Banggood uses. Frankly, I'm surprised it arrived in a single piece, much less functional.

The vast majority of shippers and delivery persons (including the U. S. Snail Postal Disservice) are good, honest people who do their work the best they can every day, even when it's difficult, even when the weather sucks, even when there's a hundred things they'd RATHER be doing with their day. As is inscribed on the James Farley Post Office in New York,?"Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds". It's not an official motto, but it might as well be. Most of the postal carriers I've met -- and being disabled, I have met nearly all of the ones that come to my door, as I'm always home -- are conscientious and take excellent care of my mail.

BUT...

Once in a while, I get one of THOSE postal carriers for whom that motto is something to scoff at. They don't live by that. Their motto seems to be "So long as I can sit on my bulbous butt in a little van and walk as little as possible, I'll try to get your crap to you eventually. But don't hold your breath if I have to get out of my damn van because ain't nobody got time for that." Most of the mail carriers who bring stuff to my house, if it's letters, will put them in the mailbox at the curb, but if it's parcels, will get out of the van, walk up to the porch, and put them either in front of my door or on the porch where they won't get rained on.

But the OTHER sort will DRIVE their van into my backyard, turn around, and either leave my packages on the BACK porch, where they don't have to get out of the van, leaving them to get soaked by rain, or will then pull up to the front porch and leave them on the TWO STEPS up, again, where they're not under the overhang of the porch and will get rained on. And heaven forfend I get a package that needs to be SIGNED for, and I get THAT mail carrier. Suddenly, I'll find a slip in my mailbox saying "Delivery attempted, no one home." Why? Because that fat slob was too lazy to get out of the van and bring the thing to my door and ring the bell. They'd rather just keep it in their van and claim nobody was there to sign for it, so the guy who gets it TOMORROW will have to get out of the van.

This guy is similar to the Amazon delivery person who'll mark it "Delivered - placed directly into the recipient's hands", even when you not only were home, but WAITING for the package on your PORCH. These yahoos are who the latest Amazon features, attaching a photo of the delivery location to your tracking info, and sending you a message when they are 10 stops away from your home so you can track them on a map, were implemented to catch. IF they honestly delivered it to the wrong house, you have a chance of identifying where they really took it, and you can WATCH to see if they actually came anywhere near your house when they said "Oh, I delivered that!" and DIDN'T.

Somewhere out there is a box of expensive hydrocolloid band-aids that someone got for free because the Amazon driver took it SOMEWHERE and put it "in someone's hands". It wasn't my hands, that's all I know.

But once in a great while, you run into the EVIL delivery person. They're the one that hates their job, hates the packages, hates the weather, hates their boss, and most of all, hates YOU for making them do that job delivering the packages in the weather because their boss TOLD them to. THAT delivery person is likely, if your delivery makes them do ANYTHING more than the bare minimum, to put the boot to your parcels or THROW them on the porch from about 20 feet away...or, if they're feeling particularly feisty, smack them onto your porch with a baseball bat. And woe betide the person who calls them out for doing this to their expensive packages, for that person shall receive NO package unstomped, no parcel unkicked, and no gift box unpeed.?

So, if you have received ALL of your parcels from a given location in a destroyed condition, and NOBODY ELSE has this problem, the chances of you receiving kits that Ashhar just HAPPENED to feel like running through a hammer mill are slim and none, and Slim just left town. The chances are much higher that you got THAT delivery person and somehow ticked them off so they look for the parcels you want the most and beat them with their delivery van's fire extinguisher before they throw them overhand onto your porch, bouncing them off the wall before driving across your lawn on the way out.

Talk to your postmaster or the appropriate delivery service immediately if you receive damaged parcels. ESPECIALLY if parcels from a particular location arrive damaged OFTEN. For all we know, the guy who delivered your BitX kits has some beef with people from India and specifically mangles those parcels. Or you may have ticked them off somehow so they fold, spindle and mutilate anything sent to you just because you're SUCH a prince.

Re: Rx Radio #ubitx-help

Mike aka KC2WVB
 

OK, Sure you can listen to what you refer to as normal Shortwave because the radio's reciever covers the entire High Frequency spectrum. You will need an antenna system that allows you to tune the section of the spectrum your interested in listening to and adjust its tuning as you slide up or down the band. A 58 foot piece of wire that runs vertically for 17 feet before it bends at a right angle for the rest of its length coupled to a inexpensive MFJ 1600 long wire tuner works extremely well when the tuner and reciever are grounded to something like a cold water pipe.

The AM stations will sound a bit weird at first because if your not right on their carrier frequency the difference is heard as a high pitched tone that progressively becomes lower and goes to zero as you adjust the tuner on your reciever to match the AM broadcaster's carrier frequency. Since many broadcast AM with a side band to the left of the carrier and to the right of the carrier you will here the change in tone as you approach the carrier frequency from either end.?

Lastly, the reciever tunes well below the HF region into and below the AM commercial broadcast band. You can listen here too. Here I 'd recommend using a simple to make magnetic loop antenna because the frequency length of the associated stations in this area of the spectrum are so long that long wire antennas that will receive their signal are impractical to put in place.

Have fun, I do more listening then transmitting and what I described is what I am using with darn good success.

On Fri, Jun 22, 2018, 4:43 AM sridhar <vu3pen@...> wrote:
I had ubitx ,currently using for RX Only ,its my first HF set ,Ubitx having 3 Mhz to? 30 Mhz Frequency ,
1)Can i use this for Normal Radio RX i.e SW , i am able here radio but audio is not able to recognize.?
2)? what changes do need to do in this set to added any component to get full audio from SW frequency?



de?
vu3pen
sridhar?

Re: experience with Sunil VU3SUA's enclosures #ubitx

David Wilcox
 

¿ªÔÆÌåÓý

I have ordered twice and received the cases in each order but never had any email letting me know it was coming. ?It took about a month to get to Michigan.

Dave K8WPE

On Jun 22, 2018, at 12:17 AM, Mike KK7ER <groupio@...> wrote:

My young son got an Elenco FM radio kit for Christmas.? We built it together and now he is hooked.? He is studying for his technician license.
He has a birthday coming up so a few weeks back, I ordered a uBitX and one of Sunil Lakhani's cases.
The uBitX came in about a week.? Despite my credit card being charged immediately, I never received any acknowledgment of the case order.? I have tried to contact Sunil through several different channels but have gotten no response.? There were 12 of the cases in stock at the time of the order.? I am wondering if I should dispute the credit card charge or keep waiting.? What has been the experience of people in this group who have ordered cases from Sunil?? Has he come through?? What was time from order to delivery (in the US)?? Did you have trouble with communication about your order?

Thanks and 73,
Mike KK7ER

Re: uBITX Version 4 first attempt #ubitx-help #ubitx

Andy V. Borisenko
 

Richard, what is you version software now?
Re: experience with Sunil VU3SUA's enclosures #ubitx

 

Sunil has a list of countries to which he can send goods via DHL.? If your country is not on the list, you will have to receive your order via India Post.? This can take four weeks or more (to Australia).? I have found Sunil responsive to emails.? I acknowledge that my experiences may not be similar to yours, but apart from the lack of tracking information from India Post, and the long time it takes to get stuff via their service, I have so far found everything has got here in an undamaged state.

vy 73
Kevin VK3DAP / ZL2DAP
Rx Radio #ubitx-help

 

I had ubitx ,currently using for RX Only ,its my first HF set ,Ubitx having 3 Mhz to? 30 Mhz Frequency ,
1)Can i use this for Normal Radio RX i.e SW , i am able here radio but audio is not able to recognize.?
2)? what changes do need to do in this set to added any component to get full audio from SW frequency?



de?
vu3pen
sridhar?
Re: TDA 28222

 

Great? Daniel.
?please never insert stero head phones? while set is ON.
?once you have stero phones connected.? no issues to switch on.
? Failure (by short circuit ) happens only during insertion .
All the best sarma
?vu3zmv

Regards
MVS Sarma
?

On Fri, Jun 22, 2018 at 12:06 AM, Daniel Conklin <danconklin2@...> wrote:
Mine has the WX brand TDA2822.? I put a 6v regulator in the 12v supply line to the chip as suggested on this group and it has been working fine for a couple of months now.? The audio is loud and clear.??
Daniel, W2DLC


Re: Blown (socketed) TDA2822?

 

Thanks RAJ? sir.
The datasheets? whther suffix D or normal(dip) show test results all defined around 6 or 9V supply. and definitely not not at 12 or 13.8.

Thus most of us may have to reduce the supply to TDA2922 to say6V ( for 4 to 16 ohm speakers)

That would be a fiarpaly around V3 PCBs.

regards
sarma
vu3zmv

Regards
MVS Sarma
?

On Fri, Jun 22, 2018 at 7:40 AM, Raj vu2zap <rajendrakumargg@...> wrote:
Jerry,

I think its the TDA2822D that has been repackaged. See the specs attached!

Raj

At 21/06/2018, you wrote:
>The WX branded TDA2822 simply does not meet spec.?
>We have no idea what spec it meets, as WX does not have a datasheet for it.
>In addition to an apparent absolute max supply voltage of around 6 or 8v,
>it quite likely suffers in the audio quality department.
Re: Blown (socketed) TDA2822?

 

Jerry,

I think its the TDA2822D that has been repackaged. See the specs attached!

Raj

At 21/06/2018, you wrote:
The WX branded TDA2822 simply does not meet spec.
We have no idea what spec it meets, as WX does not have a datasheet for it.
In addition to an apparent absolute max supply voltage of around 6 or 8v,
it quite likely suffers in the audio quality department.

tda2822d.pdf
tda2822d.pdf

Re: smd Capacitor #bitx40

 

Thanks for that info Doug.
My board has a C107 in place at the balanced modulator, but a search shows that some boards were shipped with this cap missing.?
I guess they threw in a spare cap just to make sure.
--
John VK6JAH
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