Date   

Re: ubitx 40 for sale...

Jerry Gaffke
 

Bill, nobody is forcing you to buy anything here.
I suggest you hold that attitude in reserve.
May need it someday for your ISP or your medical bills or your local garbage fees or something..

Jerry



On Sat, Jan 26, 2019 at 06:11 AM, Bill Cromwell wrote:
I have posted here before about selling non-working radios.


Re: *** SPAM ***Re: [BITX20] Recieve audio

Arv Evans
 

In addition to Hans removing the spammer from our ranks (thanks Hans), there were a number 
of messages with "--SPAM--" as part of the hashtag or topic.  Those messages have also been 
deleted.  Hopefully this will clean things up a bit for those who are browsing the archives.

Arv K7HKL
_._


On Sat, Jan 26, 2019 at 1:04 AM Warren McRobie <w.d.mcrobie@...> wrote:
All fixed then?



Sent from my Galaxy Tab® A

-------- Original message --------
From: John Graham <zl4ro@...>
Date: 26/01/19 19:32 (GMT+12:00)
Subject: Re: *** SPAM ***Re: [BITX20] Recieve audio

Hi Raj
Forgot to put the K in on my readings
10.69 K ohms. Power off
6.4 K ohms power on
1.0 ohms on TX
Many thanks for all your help
John ZL4RO

Sorry not a Fluke meter or results might be different.



-----Original Message-----
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Raj vu2zap
Sent: Saturday, 26 January 2019 6:24 PM
To: BITX20@groups.io
Subject: *** SPAM ***Re: [BITX20] Recieve audio

Thanks John,

Good find!

However I am surprised at your reading at TP21 which should be TX like
reading.

RX = 12K without power, 5-7K with power depending on probe polarity.
TX = 18 Ohms.

Raj

At 26-01-19, you wrote:
>Hi Raj.. Found  T21 - 10.66 ohms by my  multi meter.  While probing around
with multimeter I found the problem. I had a senior moment and put the
positive and negative wires on the wrong way around to the mono speaker
socket. It happens to us oldies on occasion.
>Amazing how the uBITx put up with the wiring the wrong way around, without
something else failing. I now have noise coming out  of the speaker.
>I will search the forum to find the D15 D16  modification
>It's thanks people like your self, and others on the uBITx net, that are
there to point the likes of me and others in the right direction, when it
comes to diagnoising. Thank you very much for taking the time to assist and
reply to my questions.
>Happy uBITx operator
>John Graham ZL4RO





---
This email has been checked for viruses by AVG.
https://www.avg.com





Re: 4 bitx radios

_Dave_ AD0B
 

This


Re: ubitx Cabinets by VU2POP

joel taylor
 

Hello Prathap,

What is the cost on this and do you have a web site with order info?

Regards
Joel 




On Saturday, January 26, 2019, 12:47 AM, Prathap Naidu <vu2pop@...> wrote:

Hi All

Sharing some piuctures of the ubitx cabinet made by me.

This is a common cabinet for both 2 line LCD aswell as the 2.8 TFT display

You need to change only the bezel

As usual will supply complete cabinet, fixtures , mic , mic/ptt sockets pcb, speaker, fuse holder, fuse,

heat sink insulation kit, heat sink compound, tags, screws, usb cable panel mount, knobs, folding feet, glue, 

Also USB to rear panel connector cable to fit on to Radiuno

etc. etc as earlier, except this cabinet will have common front panel for 2.8 inch TFT & 2 line LCD

The bezels will change

So a person building a ubitx stock can start with stock LCD supplied getting it going , then adapt the TFT display

 

Thanks happy homebrewing

73 de Pop

VU2POP

 

 

 

 

 


Re: ubitx 40 for sale...

Bill Cromwell
 

Hi Bob,

I have posted here before about selling non-working radios. It may have even been a reply to one of your posts. Nobody in his right mind would buy a dead radio for anything close to the full price of a new, working radio. And no, I don't want to acquire your radio so don't snap at me about it. I didn't break your radio and neither did Tim. Maybe you can resell the bits that can be verified as 'good' like the case you bought for it and recover some of your money.

Maybe you can find somebody who lives nearby and have them help you get your radio working. Then, instead of selling it at a loss you can actually enjoy it on the air. I would think that's why you bought it.

I have bought a few junk radios for junk prices over the years. Some I repaired and used (and still use a couple). Others were beyond hope and I removed a few (very few) parts and scrapped the rest. I didn't use most of the parts I got but passed them along to other hams (free). The prices I paid were low enough I could have just burned the money and not lost any sleep over it.

That $30 offer I thought was fair. That guy will have to spend time and money getting the radio working. If indeed it can be repaired. I have a pocket knife with a broken blade I would like to sell but so far there are no buyers.

73,

Bill KU8H

On 1/26/19 3:40 AM, Bob Lunsford via Groups.Io wrote:
I suspect it "may" be the Raduino that went belly-up.
The main board is no doubt OK.
Would not want to bother you with something that
is "not worth the price of a new one even with the extras."
It's not even worth that to me considering the trouble of
packing and shipping.
It's still less than a new one and a lot quicker to receive.
I'd rather just give it to someone who wants to play with it
than sell it to someone who wants to "throw" me something and
get a “freebie” that’s “not worth the price.”
Wouldn’t want to bother you...
Bob — KK5R
--
bark less - wag more


Re: ubitx v4 spurs fix confusion #ubitx-help #ubitx

_Dave_ AD0B
 

Ah that explains why my radio didn't like 680uH I think that was value I saw posted. Can confirm that 680 uH really attenuates the signal.


Re: ubitx 40 for sale...

Guy Skeer
 

I would be tickled to play with it, Bob! 

A survivalist/Prepper Group I am a member of is searching for an entry-level rig for Solar/Battery useage.  They have been pretty quick to get their Amateur Radio Operators' General Licenses from the jump, but are hesitant to buy into a near $1000 All-Band set-up...  A "Ham Shack" beginning with One of these sounds "Doable" to several of them, and they asked Me to investigate.

Wife and Daughter, both Hams, are hopeful I can revive the unit....

73,

Guy Skeer


internal view of cabinet

Prathap Naidu
 

Sorry I missed sending this internal picture

73 de Pop

VU2POP


ubitx Cabinets by VU2POP

Prathap Naidu
 

Hi All

Sharing some piuctures of the ubitx cabinet made by me.

This is a common cabinet for both 2 line LCD aswell as the 2.8 TFT display

You need to change only the bezel

As usual will supply complete cabinet, fixtures , mic , mic/ptt sockets pcb, speaker, fuse holder, fuse,

heat sink insulation kit, heat sink compound, tags, screws, usb cable panel mount, knobs, folding feet, glue, 

Also USB to rear panel connector cable to fit on to Radiuno

etc. etc as earlier, except this cabinet will have common front panel for 2.8 inch TFT & 2 line LCD

The bezels will change

So a person building a ubitx stock can start with stock LCD supplied getting it going , then adapt the TFT display

 

Thanks happy homebrewing

73 de Pop

VU2POP

 

 

 

 

 


Re: ubitx 40 for sale...

Bob Lunsford
 

I suspect it "may" be the Raduino that went belly-up.

The main board is no doubt OK.

Would not want to bother you with something that
is "not worth the price of a new one even with the extras."

It's not even worth that to me considering the trouble of
packing and shipping.

It's still less than a new one and a lot quicker to receive.

I'd rather just give it to someone who wants to play with it
than sell it to someone who wants to "throw" me something and
get a  “freebie” that’s
“not worth the price.”

Wouldn’t want to bother you...

Bob — KK5R

On Friday, January 25, 2019, 9:29:49 PM EST, KE2GKB via Groups.Io <tkeller@...> wrote:


I'll throw you 30 shipped for it. Not working its not worth the price of a new one even with the extras.

--
Tim Keller - KE2GKB
https://shop.kit-projects.com


Re: Recieve audio

 

Thanks John,

Good find!

However I am surprised at your reading at TP21 which should be TX like reading.

RX = 12K without power, 5-7K with power depending on probe polarity.
TX = 18 Ohms.

Raj

At 26-01-19, you wrote:
Hi Raj.. Found T21 - 10.66 ohms by my multi meter. While probing around with multimeter I found the problem. I had a senior moment and put the positive and negative wires on the wrong way around to the mono speaker socket. It happens to us oldies on occasion.
Amazing how the uBITx put up with the wiring the wrong way around, without something else failing. I now have noise coming out of the speaker.
I will search the forum to find the D15 D16 modification
It's thanks people like your self, and others on the uBITx net, that are there to point the likes of me and others in the right direction, when it comes to diagnoising. Thank you very much for taking the time to assist and reply to my questions.
Happy uBITx operator
John Graham ZL4RO


Re: Recieve audio

John Graham
 

Hi Raj.. Found  T21 - 10.66 ohms by my  multi meter.  While probing around with multimeter I found the problem. I had a senior moment and put the positive and negative wires on the wrong way around to the mono speaker socket. It happens to us oldies on occasion.
Amazing how the uBITx put up with the wiring the wrong way around, without something else failing. I now have noise coming out  of the speaker.
I will search the forum to find the D15 D16  modification
It's thanks people like your self, and others on the uBITx net, that are there to point the likes of me and others in the right direction, when it comes to diagnoising. Thank you very much for taking the time to assist and reply to my questions.
Happy uBITx operator
John Graham ZL4RO


 ,


Re: #bitx40help #bitx40 #bitx40help #bitx40

Mike Short <ai4ns.mike.spam@...>
 

Has anyone / is it possible to use a display like the Nextion?


Re: #bitx40help #bitx40 #bitx40help #bitx40

Mike Short <ai4ns.mike.spam@...>
 

After recompiling with the pin interrupt library in the proper folder all works well. I let the smoke out of two Nanos due to miswired board. 

Starting Allard mods now. So far so good.


Re: Spurs/Harmonics fixes for v4 based on v5 board design?

 

Curt,

Touching L5 or L1 makes the whole chain unstable and generates a huge amount of spurs.
That is why I changed them to shielded SMD version and it improved matters a great deal.

Raj

At 26-01-19, you wrote:
I managed to assemble the two 330nH and one 47 pF cap on a tiny board, allowing me to install it with minimal effort. Following the v5 schematic I then removed the 47 ohm smt resistor, replacing it with a leaded one, cut very short. This allowed easy insertion of the filter, I have it only in the transmit path to the final mixer. My 40m output is reasonable again, but still lower than adjacent bands. I did notice when touching the L5 toroid 40m RF goes up and down. I will see if other bands are as sensitive.

Ready to move to install Gordan's relay board to address the harmonics.

Curt


Re: Spurs/Harmonics fixes for v4 based on v5 board design?

Curt
 

I managed to assemble the two 330nH and one 47 pF cap on a tiny board, allowing me to install it with minimal effort. Following the v5 schematic I then removed the 47 ohm smt resistor, replacing it with a leaded one, cut very short. This allowed easy insertion of the filter, I have it only in the transmit path to the final mixer. My 40m output is reasonable again, but still lower than adjacent bands. I did notice when touching the L5 toroid 40m RF goes up and down. I will see if other bands are as sensitive.

Ready to move to install Gordan's relay board to address the harmonics.

Curt


Re: Spurs/Harmonics fixes for v4 based on v5 board design?

 

Hi,

Sewing needles are typically nickel plated, and nickel is only fair for solderability (as is steel too.)  Sometimes they are chrome plated and chrome has very poor solderability.

Toothpicks do a good job and have very little chance to damage the hole.

If the parts on the board are durable, I often just rap the board on the table to knock the solder out of the hole after heating.

Another thing that works is to put the iron on one side and use a rubber solder sucker bulb to blow air through the hole.  A lot more force can be generated by blowing air out of the bulb than by trying to get it to suck the solder out.

Old dental tools work well too and are stainless steel so solder doesn't stick to them (but you can solder it using a special flux).

73,


Mark.


Re: ubitx 40 for sale...

KE2GKB
 

I'll throw you 30 shipped for it. Not working its not worth the price of a new one even with the extras.

--
Tim Keller - KE2GKB
https://shop.kit-projects.com


Re: Spurs/Harmonics fixes for v4 based on v5 board design?

ohwenzelph
 

I think sewing needles are made of stainless, regardless, solder does not seem to stick to them, they are ready  made and available in a variety of sizes and may even have other uses beyond clearing plated thru PCB holes.

In November Ashhar wrote “the 12 mhz from the bfo leaks into the local oscillator. A 5uh in series with a 47 pf across C202 of the LPF will suppress it.” Is this mod dead now?
( I did not see it on the V5 schematic that I finally found. )

It is pretty easy. There was a report of it killing the 30 meter band and a suggestion to use a smaller cap to move the cut of frequency a bit higher and let more of 10Mhz thru.
tnx
Jerry aa1of


Re: Websdr

Bill Cromwell
 

Hi,

I have played with the WebSDR a bit but no QSOs. I think for casual operation I would be logging the other side of the QSO as the transmitter location. I am hearing the other ham's transmitter and not his receiver.

I am not sure how I would log my own side of a QSO if I was using WebSDR to hear the other ham. I don't really expect to do that but never say never. The noise level in my area doesn't seem to prohibit receiving from home.

For contests we do whatever the contest rules say to do and we don't do what they prohibit. for example, I sometimes get into QRP events or events that have a QRP class. I regard myself as a QRP op - from less than a watt to around about 100 watts. In many of those events the rules specify 5 watts or less out of the transmitter. In those cases I keep the power to no more than 5 watts and usually only 3 or 4 watts.

73,

Bill KU8H

On 1/25/19 12:42 PM, Kevin Timm wrote:
Gary - how do you log this QSO?  You xmit/receive in Austin, the other side receives in UT but xmits in Chicago?
73
Kevin
K5KDT
--
bark less - wag more