Date   
Re: Wanted ubitx.

Dave Dixon
 

hi gilles,
              thank you for answering my email i will think about your offer regards Dave.


On Thu, 3 Jan 2019 at 15:13, F1BFU - Fr - 79 <gilles.f1bfu@...> wrote:
Hi Dave

I have uBitx V3 bought everything mounted. I finish putting in a box. This rig has not received any changes from the group .io/uBibx.
It is therefore a factory version. I still have to plug the microphone jack and put a coaxial cable to the antenna plug instead of the two-conductor cable supplied factory. I have never used it in broadcast. The box is a box bought from Sunnil (https://amateurradiokits.in/store/)

I attach the electret capsule provided to make a microphone.
I send to this the kits of K5BCQ AGC and Anticlicks.
I think 210$ plus shipping. Paypal payment preferably.

73 QRO
Gilles - F1BFU /Fr

Le jeu. 3 janv. 2019 à 14:17, Dave Dixon <wylyeguy2@...> a écrit :
Wanted ubitx.
or qcx 20 mtr version.
built or not.
contact Daveg0ayd@... with price.



--
Gilles - F1BFU/FR

Re: WTB completed Ubitx in case

Curt
 

Ed

do see what you can land.  (i have seen a few here and also on QRP-L). 

on the plus side -- if you purchase the 'matching' case and cables from Sunil in India - build is not that complex (once you locate all the instructions).  most in our local club group build are using this approach. 

on the minus side -- those spurs -- they require some modification.  it is some more stuff to source, and apply or connect to the main board.  on a few bands these are compliant or pretty close, while on others they are too much to radiate with repair.  if you can find a nearby partner to help with supply chain and updating -- you might be more inclined to order a 'ubitx' board and case kit. 

with declining eye-sight I still managed to build a QCX - its a tight board and careful use of a PC screen is needed to determine where to place all the parts.  The uBITX coming 'mostly assembled' is a much lesser challenge. 

73 Curt

Re: WTB completed Ubitx in case

David Wilcox
 

Ed,

I am 73 and still building..... you CAN do it and I still CAN do it but there are younger more eager guys in our club who jump at the chance to build something new.  I have passed off a few kits lately because of the frustration situation...... I just want to play with some of these rigs.  I willingly build the QRP Guys stuff as it is easy and works every time.  The QCX is on my bench  for the winter build.  But with the Bitx and uBitx after reading thousands of emails in the past few years I have just let the younger guys assemble them and then I play with them.....( if they worked after I assembled them.... fine.... but if they did not then the frustration of trouble shooting them and upgrading the programming is more than I wanted to "enjoy").  Now after a while of playing with a working unit  I will give them to someone else to enjoy.  I just don't need to enjoy the frustration factor of some of the neat kits out there.  In other words,  pick your frustrations.... and enjoy the hobby. I have assembled some Elecraft stuff in the past but now only purchase the factory built units.... and most of them are that way now anyway.

Dave K8WPE

PS  QRP Labs and Hans have the  best manuals I have ever seen.  If you take a few steps each evening and don't get in a hurry you will have a working unit.  Even his personal replies when builders have problems are prompt and right on.  Most problems are failure to really read the manual and poor soldering.

On Thursday, January 3, 2019, 10:14:50 AM EST, V Zecchinelli <n1vin@...> wrote:


Hey Ed,

You've got 7 years on me but I have assembled Bitx40 and UBitX and QRP-Labs U3S.  The most difficult part of both was putting them in a case.  Assembling the radios was quite easy with minimal soldering.  It is well documented and procedures easy to follow.  Whatever your decision I wish you the best with it.
73 Vince  N1VIN


On 1/3/2019 5:38 AM, kb2nto via Groups.Io wrote:
While I would love to assemble one of these and may still. At 77 with many builds over the years. Just not sure about taking on this task. Please no junk willing to pay fair price for quality work. Have paypal account. Just thought I would see before I ordered one and took a chance. Thank you for your consideration and 73...Ed

Virus-free. www.avg.com

Re: ubitx power connection

Ian Reeve
 

Hi Evan,

 

Yes!  Commercial non amateur radio equipment did their own thing and I have come across these plugs with centre pin as negative.

 

We hold a annual Hamfest at our Club,Wythall Radio Club, and we were selling a old 2m all mode rig to a interested buyer.

It had twin thick leads for connecting to the power supply, white with a black stripe and black.

White with black stripe was the negative!  Fortunately adding in a line fuse before testing saved the day.

 

I fuse the positive leads on all my rigs between the power supply and rig!

 

Happy New Year

Ian

M0IDR

 

 

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Evan Hand <elhandjr@...>
Sent: Thursday, January 3, 2019 10:54:11 AM
To: BITX20@groups.io
Subject: Re: [BITX20] ubitx power connection
 
The assumption is that the fuse is before the power plug, or that the power supply has a crowbar function (trips on overload and needs to power off before reset).  I agree that it would have been better to show wiring from the input power plug to a fuse holder with the diode connected after the fuse.  Of course that would have meant that a fuse and holder be provided, which are not provided in the kit.

I did wire it this way, and had an old HP 12vdc 2.5 amp power brick.  I am glad I had the diode in, as the output on this brick was negative center, positive sleeve.  Crowbar kicked in and saved me a lot of grief. 

If your supply does not have an overload function then really need to add a fuse up stream of the diode.

73
Evan
AC9TU

Re: WTB completed Ubitx in case

V Zecchinelli
 

Hey Ed,

You've got 7 years on me but I have assembled Bitx40 and UBitX and QRP-Labs U3S.  The most difficult part of both was putting them in a case.  Assembling the radios was quite easy with minimal soldering.  It is well documented and procedures easy to follow.  Whatever your decision I wish you the best with it.
73 Vince  N1VIN


On 1/3/2019 5:38 AM, kb2nto via Groups.Io wrote:
While I would love to assemble one of these and may still. At 77 with many builds over the years. Just not sure about taking on this task. Please no junk willing to pay fair price for quality work. Have paypal account. Just thought I would see before I ordered one and took a chance. Thank you for your consideration and 73...Ed

Re: Wanted ubitx.

F1BFU - Fr - 79
 

Hi Dave

I have uBitx V3 bought everything mounted. I finish putting in a box. This rig has not received any changes from the group .io/uBibx.
It is therefore a factory version. I still have to plug the microphone jack and put a coaxial cable to the antenna plug instead of the two-conductor cable supplied factory. I have never used it in broadcast. The box is a box bought from Sunnil (https://amateurradiokits.in/store/)

I attach the electret capsule provided to make a microphone.
I send to this the kits of K5BCQ AGC and Anticlicks.
I think 210$ plus shipping. Paypal payment preferably.

73 QRO
Gilles - F1BFU /Fr


Le jeu. 3 janv. 2019 à 14:17, Dave Dixon <wylyeguy2@...> a écrit :
Wanted ubitx.
or qcx 20 mtr version.
built or not.
contact Daveg0ayd@... with price.



--
Gilles - F1BFU/FR

Re: BITX 40 transmit problem.

Gordon Gibby <ggibby@...>
 

​If that is the one whose base is exposed to the RF input......you really might want to put in the reverse protective diode.   Otherwise series capacitors charge up and I believe blow the base-emitter reverse voltage limit.  

cheers.....

gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of Raj vu2zap <rajendrakumargg@...>
Sent: Thursday, January 3, 2019 8:00 AM
To: BITX20@groups.io
Subject: Re: [BITX20] BITX 40 transmit problem.
 
John,

In that stage the readings may be off if there is some RF. Q13 is known to blow if there
is a strong signal transmitted nearby.

Raj

At 03-01-19, you wrote:
It looks like voltages on pre driver transistor, Q13 is not in order. Perhaps it is blown.Â
I will replace it with a normal 2N2219A transistor.Â


73ees

VU2JONÂ

John T.P.
TTRRA 80, 6th lane, TT Road, Kuriachira PO
Thrissur 680 006
Mob: 8807007933 / 9605000445

On Thu, Jan 3, 2019, 1:35 PM Raj vu2zap < rajendrakumargg@... wrote:
Start by checking the MIC polarity..

Raj, vu2zap

At 03-01-19, you wrote:
>Anyone having a trouble shooting manual on BITX40?
>Receive works fine. But No transmit power. Can you give quick check points?Ä€
>
>73ees
>
>VU2JONÄ€
>

Re: ubitx power connection

ohwenzelph
 

Wanted ubitx.

Dave Dixon
 

Wanted ubitx.
or qcx 20 mtr version.
built or not.
contact Daveg0ayd@... with price.

Re: BITX 40 transmit problem.

 

John,

In that stage the readings may be off if there is some RF. Q13 is known to blow if there
is a strong signal transmitted nearby.

Raj


At 03-01-19, you wrote:
It looks like voltages on pre driver transistor, Q13 is not in order. Perhaps it is blown.Â
I will replace it with a normal 2N2219A transistor.Â


73ees

VU2JONÂ

John T.P.
TTRRA 80, 6th lane, TT Road, Kuriachira PO
Thrissur 680 006
Mob: 8807007933 / 9605000445

On Thu, Jan 3, 2019, 1:35 PM Raj vu2zap < rajendrakumargg@... wrote:
Start by checking the MIC polarity..

Raj, vu2zap

At 03-01-19, you wrote:
>Anyone having a trouble shooting manual on BITX40?
>Receive works fine. But No transmit power. Can you give quick check points?Ä€
>
>73ees
>
>VU2JONÄ€
>

Re: BITX 40 transmit problem.

John T P
 

It looks like voltages on pre driver transistor, Q13 is not in order. Perhaps it is blown. 
I will replace it with a normal 2N2219A transistor. 


73ees

VU2JON 

John T.P.
TTRRA 80, 6th lane, TT Road, Kuriachira PO
Thrissur 680 006
Mob: 8807007933 / 9605000445


On Thu, Jan 3, 2019, 1:35 PM Raj vu2zap <rajendrakumargg@... wrote:
Start by checking the MIC polarity..

Raj, vu2zap

At 03-01-19, you wrote:
>Anyone having a trouble shooting manual on BITX40?
>Receive works fine. But No transmit power. Can you give quick check points?Ā
>
>73ees
>
>VU2JONĀ
>
>John T.P.
>TTRRA 80, 6th lane, TT Road, Kuriachira PO
>Thrissur 680 006 IndiaĀ
>Mob: 8807007933 / 9605000445




Re: Sticky S meter

Don, ND6T
 

The discharge resistance is provided in the AGC circuits in the form of the AGC hold time  resistors (R6 through 9 in the kit, R6 in the hand-made version). My concern is the analog reading method since the AGC is reported to be functional. That AGC operation should begin at S8 or S9, a voltage quite significant. In my builds, I am able to read S3 through S9 without difficulty. Sascha's readings seem low, but perhaps due to receiver gain difference? And so different on the two bands? Lots of variables.

Re: ubitx power connection

Bob Lunsford <nocrud222@...>
 

On other similar circuits, I put the diode in series with the
radio but the diode must be capable of carrying the current
required. If the radio pulls over 2A on transmit, the diode
should be one designed to carry about 5A. Instead of being
across the power lines but in reverse connection as we see
on th uBitx, it is in series with the hot/+12V side. Therefore,
if the voltage applied is reversed, the diode does not carry
current and the radio is protected. Using the 1A diode for
the kit is not enough for the total current since it is only a
1A diode.

Bob — KK5R
--------------------------------------------

On Thu, 1/3/19, Ian Reeve <ian.radioworkshop@...> wrote:

Subject: Re: [BITX20] ubitx power connection
To: "bitx20@groups.io" <bitx20@groups.io>
Date: Thursday, January 3, 2019, 5:05 AM

It will rely on a suitably rated fuse installed between the
uBITX and the power supply which will then now.There are
other solutions available if you search for reversed
polarity protection.  As it stands without the added fuse
it will not do the job.






Get Outlook for Android




From: BITX20@groups.io
<BITX20@groups.io> on behalf of terry hughes via
Groups.Io
<terryhugheskirkcudbright=yahoo.co.uk@groups.io>

Sent: Thursday, January 3, 2019 9:53:41 AM

To: BITX20@groups.io

Subject: [BITX20] ubitx power connection
 

hi the wire up instructions show the diode across the
power supply in reverse.



if the power is connected the wrong way round , sure the
diode will blow but the power is still connected.



terry gm4dso

Re: JackAl now on Sale

terry hughes
 

hi rhys
thanks for that clarication
as i normally run 10 watts from my bitx and only 200 watts from my trio then  if i am allowed 800 watts is irrelevant.

73 de gm4dso

Re: Raduino for uBitx

Ashok Khachar
 


On Wed, Jan 2, 2019 at 3:33 PM <vavro@...> wrote:
Hello, Please have someone working raduino uBitx board for sale ?
Thanks
Miroslav 
OM6VM

Re: Audio mixer and dynamic microphone on ubitx #ubitx #ssb

 

Sorry Mark, I had the Bitx40 in mind. Yes Blue is ground and purple is input.

Take the input at about 1 - 2.2K thats common. I am not sure what the supplied one is.

Try a 10K preset/pot in series with mic line and see if that works to get 10W@ 40M,
keep that power as the limit.

Raj

At 03-01-19, you wrote:

Hi Raj.

Mic Input is blue(tip) and purple(tip).
What is the input impedance on the ubitx mic input ?

R60 for mic-bias has been removed.

Re: ubitx power connection

Evan Hand
 

The assumption is that the fuse is before the power plug, or that the power supply has a crowbar function (trips on overload and needs to power off before reset).  I agree that it would have been better to show wiring from the input power plug to a fuse holder with the diode connected after the fuse.  Of course that would have meant that a fuse and holder be provided, which are not provided in the kit.

I did wire it this way, and had an old HP 12vdc 2.5 amp power brick.  I am glad I had the diode in, as the output on this brick was negative center, positive sleeve.  Crowbar kicked in and saved me a lot of grief. 

If your supply does not have an overload function then really need to add a fuse up stream of the diode.

73
Evan
AC9TU

WTB completed Ubitx in case

Ed Howell
 

While I would love to assemble one of these and may still. At 77 with many builds over the years. Just not sure about taking on this task. Please no junk willing to pay fair price for quality work. Have paypal account. Just thought I would see before I ordered one and took a chance. Thank you for your consideration and 73...Ed

Re: JackAl now on Sale

gw0div@btinternet.com
 

The UK licence power limit is not affected by the gain of the antenna (except possibly 136KHz). The power is measured at the feed point to the antenna, so coax loss is taken into the equation, but not antenna gain. With a feeder loss of 3dB, a full licence holder could run 800W, giving 400W at the antenna. The antenna gain would be irrelevant as far as their licence is concerned.

Rhys
GW0DIV 

Re: ubitx power connection

Ian Reeve
 

It will rely on a suitably rated fuse installed between the uBITX and the power supply which will then now.There are other solutions available if you search for reversed polarity protection.  As it stands without the added fuse it will not do the job.


From: BITX20@groups.io <BITX20@groups.io> on behalf of terry hughes via Groups.Io <terryhugheskirkcudbright@...>
Sent: Thursday, January 3, 2019 9:53:41 AM
To: BITX20@groups.io
Subject: [BITX20] ubitx power connection
 
hi the wire up instructions show the diode across the power supply in reverse.

if the power is connected the wrong way round , sure the diode will blow but the power is still connected.

terry gm4dso