Date   

Re: Power supply

Lee
 

Some laptop style power supplies are noisy but I have had good luck with 12 volt 30 amp switching power supplies on Amazon for under $20 with Prime.   Now I have more than enough power to run my 70 watt Chinese amp kit too.

https://www.amazon.com/eTopxizu-Universal-Regulated-Switching-Computer/dp/B00D7CWSCG/ref=sr_1_4?ie=UTF8&qid=1542922362&sr=8-4&keywords=12+volt+power+supply+30+amp

--
Lee - N9LO  "I Void Warranties"

 


Power supply

joel taylor
 

I’m sure this has been covered but I would like to know what are the favorite power supply options for the Ubitx. (12v 3a).  No plans to be portable so either a bench top unit or something I can mount in an enclosure for the radio.  Also with some of the other options I am seeing, maybe I will need other voltage outputs.   Thanks!

Joel




Re: Finally got my ubitx on the air!

iz oos
 

I found it, a Plessey SL6270C. Thanks very very much for the schematics with the indication of the easy mod to do on the ubitx. It will make it in the next weekends.


Il 22/nov/2018 18:25, "iz oos" <and2oosiz2@...> ha scritto:

Excellent! If I have the same part I will follow this schematics. That part is very military and sounds very good on air.


Il 22/nov/2018 18:01, "barry underwood via Groups.Io" <under2b=yahoo.co.uk@groups.io> ha scritto:
I used the circuit straight out of the datasheet, using the 12V TX line for power and a 78l05 regulator. My circuit is attached.

Barry



Re: Ubitx working, audible tone over signals on RX

Evan Hand
 

I and a relative both implemented the Nextion screen with the CEC software and have experienced the same issue.  Filtering, putting it on a seperate regulator does not solve the problem.  The only thing that has worked so far is either a totally seperate supply (common only at the ground to the display), or to run at full brightness as Geoff has stated.

Looking into separate regulator with low pass filter to see if that solves the problem.

Evan AC9TU


Re: Finally got my ubitx on the air!

iz oos
 

Excellent! If I have the same part I will follow this schematics. That part is very military and sounds very good on air.


Il 22/nov/2018 18:01, "barry underwood via Groups.Io" <under2b=yahoo.co.uk@groups.io> ha scritto:
I used the circuit straight out of the datasheet, using the 12V TX line for power and a 78l05 regulator. My circuit is attached.

Barry


Re: Great Results with Mic Preamp

kenhol@sbcglobal.net
 

Saw that article last night. Thanks for your report on it's value to you.




On Wed, Nov 21, 2018 at 7:32 PM -0600, "Mike Lichtman via Groups.Io" <tchrme@...> wrote:

     This might be old news to some but was new to me. I saw the mic preamp for using a dynamic mic with radios designed for electrets in the Hints and Kinks column of the Dec 18 QST. It is only 4 parts and is powered by the radio's voltage to the electret. I was getting voice peaks of 5 to 10 watts on 80m with the electret and with the dynamic and preamp went to 15 w. I am in CA and a station in AZ said the signal was stronger and better audio quality. I am using an inexpensive Audiotechnica dynamic mic. When I look on the panadaptor on my QRO radio, I did not see any spurs. I made it with parts from my junk box so the cost was zero and I can use it with my other QRP rigs. 73 and Happy Thanksgiving, Mike KF6KXG



Re: Finally got my ubitx on the air!

barry underwood
 

I used the circuit straight out of the datasheet, using the 12V TX line for power and a 78l05 regulator. My circuit is attached.

Barry


Re: Ubitx working, audible tone over signals on RX

Geoff G3NPI <g.suggate@...>
 

With CEC s/w I have experienced this tone. It is generated by the circuit used to adjust the screen brightness.

Click on CW Panel (bottom left of screen), click on screen brightness, I found that increasing the brightness clears the tone!!

Good luck

 

Geoff G3NPI

 

Sent from Mail for Windows 10

 


Virus-free. www.avg.com


Re: Finally got my ubitx on the air!

iz oos
 

Congrats for the nice construction, excellent case too!!!


Il 22/nov/2018 16:17, "iz oos" <and2oosiz2@...> ha scritto:

Excellent for the VOGAD, you can just whisper and have QSO! I Believe I have a spare Plessey like u used, which circuit have u used? I would be pleased to replicate it!


Il 22/nov/2018 15:04, "barry underwood via Groups.Io" <under2b=yahoo.co.uk@groups.io> ha scritto:
Just finished building the ubitx V3 that I have had for a while (Photo attached)
I am using the KD8CEC software and the stock 2 line display.
Power chain mods completed, 14 Watts on the lower bands now, dropping to 5 Watts on 10m
The ND6T AGC and S meter were a very worthwhile addition.
I have also added a VOGAD mike preamp using the SL6270 and an old dynamic microphone from my Alinco DX70.
First few contacts on 40m have been very encouraging.

Barry, G4BUD


Re: Finally got my ubitx on the air!

iz oos
 

Excellent for the VOGAD, you can just whisper and have QSO! I Believe I have a spare Plessey like u used, which circuit have u used? I would be pleased to replicate it!


Il 22/nov/2018 15:04, "barry underwood via Groups.Io" <under2b=yahoo.co.uk@groups.io> ha scritto:
Just finished building the ubitx V3 that I have had for a while (Photo attached)
I am using the KD8CEC software and the stock 2 line display.
Power chain mods completed, 14 Watts on the lower bands now, dropping to 5 Watts on 10m
The ND6T AGC and S meter were a very worthwhile addition.
I have also added a VOGAD mike preamp using the SL6270 and an old dynamic microphone from my Alinco DX70.
First few contacts on 40m have been very encouraging.

Barry, G4BUD


Re: Good soldering Iron price

_Dave_ AD0B
 

Thanks Jack,  Just ordered one


Re: Iambic paddles

Dennis Yancey
 

You are correct, sorry for the confusion....


--
72 and God bless
KD4EPG


Re: Homebrew from scratch #ubitx

a.vision
 

Thank you Paul



Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: Paul Galburt - K2AYZ <galburt@...>
Date: 22/11/2018 13:33 (GMT+00:00)
To: BITX20@groups.io
Subject: Re: [BITX20] Homebrew from scratch #ubitx

There are many excellent Chinese suppliers, but I have had perfect results with Seeed Studios - and they provide a very user-friendly web site for quotations and ordering.

73,

Paul 
K2AYZ


Re: Homebrew from scratch #ubitx

a.vision
 

Thank you Paul 



Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: Paul Galburt - K2AYZ <galburt@...>
Date: 22/11/2018 13:33 (GMT+00:00)
To: BITX20@groups.io
Subject: Re: [BITX20] Homebrew from scratch #ubitx

There are many excellent Chinese suppliers, but I have had perfect results with Seeed Studios - and they provide a very user-friendly web site for quotations and ordering.

73,

Paul 
K2AYZ


Finally got my ubitx on the air!

barry underwood
 

Just finished building the ubitx V3 that I have had for a while (Photo attached)
I am using the KD8CEC software and the stock 2 line display.
Power chain mods completed, 14 Watts on the lower bands now, dropping to 5 Watts on 10m
The ND6T AGC and S meter were a very worthwhile addition.
I have also added a VOGAD mike preamp using the SL6270 and an old dynamic microphone from my Alinco DX70.
First few contacts on 40m have been very encouraging.

Barry, G4BUD


Re: Homebrew from scratch #ubitx

Jack, W8TEE
 

I agree. All of the boards that I've ordered (Forty-9er, antenna analyzer, JackAl) have been first rate. We had hoped they would do the JackAl assembly, too, but their price for assembly was way out of line...like 3x the lowest bidder.

Jack, W8TEE

On Thursday, November 22, 2018, 8:33:59 AM EST, Paul Galburt - K2AYZ <galburt@...> wrote:


There are many excellent Chinese suppliers, but I have had perfect results with Seeed Studios - and they provide a very user-friendly web site for quotations and ordering.

73,

Paul 
K2AYZ


Re: Homebrew from scratch #ubitx

Paul Galburt - K2AYZ
 

There are many excellent Chinese suppliers, but I have had perfect results with Seeed Studios - and they provide a very user-friendly web site for quotations and ordering.

73,

Paul 
K2AYZ


Re: Iambic paddles

iz oos
 

Dennis, I believe you mistyped. It should be Mfj-564. The 464 is a cw reader. A friend of mine was looking for a paddle.


Il 22/nov/2018 09:43, "Dennis Yancey" <Kd4epg@...> ha scritto:
This may not be the proper place it as I am funding another uBitx purchase, maybe you won’t get too upset...

I have a very nice all Chrome MFJ 464 for sale. It is excess to my needs. The paddles are in superb shape, chrome has no scratches or pitting It comes with the stereo cable with 3.5mm plug. Due to its weight, probably need to ship in flat rate box. Local pickup in Lake St. Louis, Mo. area is always welcome. The price is $50.00 plus shipping.
Pictures available on request via email...


--
72 and God bless
KD4EPG


Iambic paddles

Dennis Yancey
 

This may not be the proper place it as I am funding another uBitx purchase, maybe you won’t get too upset...

I have a very nice all Chrome MFJ 464 for sale. It is excess to my needs. The paddles are in superb shape, chrome has no scratches or pitting It comes with the stereo cable with 3.5mm plug. Due to its weight, probably need to ship in flat rate box. Local pickup in Lake St. Louis, Mo. area is always welcome. The price is $50.00 plus shipping.
Pictures available on request via email...


--
72 and God bless
KD4EPG


Great Results with Mic Preamp

Mike Lichtman
 

This might be old news to some but was new to me. I saw the mic preamp for using a dynamic mic with radios designed for electrets in the Hints and Kinks column of the Dec 18 QST. It is only 4 parts and is powered by the radio's voltage to the electret. I was getting voice peaks of 5 to 10 watts on 80m with the electret and with the dynamic and preamp went to 15 w. I am in CA and a station in AZ said the signal was stronger and better audio quality. I am using an inexpensive Audiotechnica dynamic mic. When I look on the panadaptor on my QRO radio, I did not see any spurs. I made it with parts from my junk box so the cost was zero and I can use it with my other QRP rigs. 73 and Happy Thanksgiving, Mike KF6KXG