Date   
BITX20 kits for sale or barter

Patrick Pugh Sawian
 

Hi all,

BITX20 kits for sale or barter. Version 3C. If you have an offer let me know or we can exchange for a set of PCBs for the BITX SBL-1. Am selling the kits as I have fallen in love with the 6.1 kits from indoware.

73ees,
Pat


Re: BITX20 kits for sale or barter

vijai george
 

price for pcb


On Tuesday, November 1, 2016 12:34 AM, "patrick_pugh2000@... [BITX20]" wrote:


 
Hi all,

BITX20 kits for sale or barter. Version 3C. If you have an offer let me know or we can exchange for a set of PCBs for the BITX SBL-1. Am selling the kits as I have fallen in love with the 6.1 kits from indoware.

73ees,
Pat



Re: BITX20 kits for sale or barter

Art Olson
 

Patrick

Where are you buying your info ware 6.1?  Your experience in building it? 

Art

On Nov 1, 2016, at 3:32 AM, patrick_pugh2000@... [BITX20] <BITX20@...> wrote:

 

Hi all,

BITX20 kits for sale or barter. Version 3C. If you have an offer let me know or we can exchange for a set of PCBs for the BITX SBL-1. Am selling the kits as I have fallen in love with the 6.1 kits from indoware.

73ees,
Pat


Re: My BITX40 arrived also

MAc B
 

Poland - Bitx Received 31.10 2016.
Immpresive, fantastic, undamaged.
Receiver tested ;-) working very good. I suppose I will test TX today.

I agree - L4 could be fixed, but nothing bad happened.
Amazing little radio
Thank You.
 
MAc
sp9mrn

Re: My BITX40 arrived also

Arv Evans
 

Cor PA4Q

Not sure what the solution might be for that "dangling" VFO inductor.  It needs to
be modifiable in case the buyer wants to change VFO range to meet personal
desire, and removable if the buyer wants to use an external VFO or DDS signal
source.  Farhan has suggested that once you have the VFO set for your
particular frequency range then it can be fastened in place with a drop of glue or
hot-melt plastic.  Of course that does not solve the potential for it being damaged
during shipping.  I have suggested to Farhan that maybe a bit more packing
material might be included in the box to keep the board from sliding around during
shipping.

Arv K7HKL
_._


On Tue, Nov 1, 2016 at 1:29 AM, 'dx11' dx11@... [BITX20] <BITX20@...> wrote:
 

Just for the record.

I ordered mine oct. 14 and it arrived in the Netherlands the 27th. Both packaging and contents were undamaged after visual inspection.. All components were in the plastic bag.

The only worry I have for other boards is the L4 VFO toroid that is dangling a bit on its very thin wire ends. Those might easily break when subjected to shocks during transport. A drop of glue before transport might prevent that.

But otherwise the board looks great and I am very happy with it.

 

Cor PA4Q


Re: BITX20 kits for sale or barter

Tom Clifton
 

SSB6.1 Can ne purchased on ebay from a number of sellers.  This is an smd project with a very active support group on Facebook that is moderated by Nick Strong.  This kit is not for the faint of heart.  Expect to receive a bag of parts, almost guaranteed to be something missing, or substitutions?  The only build documentation is on the Facebook list.  You will need a DDS VFO of some kind and some form of QRP linear amp as the kit is an exciter and receiver.


I have been poking at mine for some time now.  Has kept me busy, which is a good thing.


Don't expect instant gratification if you go this route - it will be a challenge.


73 Tom in St Louis




Sent from my Sprint Tablet.


------ Original message------

From: Art Olson olsonaj6927@... [BITX20]

Date: Tue, Nov 1, 2016 7:17 AM

To: BITX20@...;

Subject:Re: [BITX20] BITX20 kits for sale or barter


 

Patrick

Where are you buying your info ware 6.1?  Your experience in building it? By

Art

On Nov 1, 2016, at 3:32 AM, patrick_pugh2000@... [BITX20] <BITX20@...> wrote:

 

Hi all,

BITX20 kits for sale or barter. Version 3C. If you have an offer let me know or we can exchange for a set of PCBs for the BITX SBL-1. Am selling the kits as I have fallen in love with the 6.1 kits from indoware.

73ees,
Pat


I am a new entry

fabrizio.marincola
 

Hello to all
I have just ordered BITX20 kit. I look forward to the postman!
73 de i0hcj Fab

Re: BITX20 kits for sale or barter

Art Olson
 

Tom

Thanks. Need a good winter project 

73

Art

On Nov 1, 2016, at 12:09 PM, kc0vsj@... kc0vsj@... [BITX20] <BITX20@...> wrote:

 

SSB6.1 Can ne purchased on ebay from a number of sellers.  This is an smd project with a very active support group on Facebook that is moderated by Nick Strong.  This kit is not for the faint of heart.  Expect to receive a bag of parts, almost guaranteed to be something missing, or substitutions?  The only build documentation is on the Facebook list.  You will need a DDS VFO of some kind and some form of QRP linear amp as the kit is an exciter and receiver.


I have been poking at mine for some time now.  Has kept me busy, which is a good thing.


Don't expect instant gratification if you go this route - it will be a challenge.


73 Tom in St Louis




Sent from my Sprint Tablet.


------ Original message------

From: Art Olson olsonaj6927@... [BITX20]

Date: Tue, Nov 1, 2016 7:17 AM

To: BITX20@...;

Subject:Re: [BITX20] BITX20 kits for sale or barter


 

Patrick

Where are you buying your info ware 6.1?  Your experience in building it? By

Art

On Nov 1, 2016, at 3:32 AM, patrick_pugh2000@... [BITX20] <BITX20@...> wrote:

 

Hi all,

BITX20 kits for sale or barter. Version 3C. If you have an offer let me know or we can exchange for a set of PCBs for the BITX SBL-1. Am selling the kits as I have fallen in love with the 6.1 kits from indoware.

73ees,
Pat


New Bitx40 Owner

michaeldotnet@...
 

Ordered on Oct. 19th and it arrived here in the USA on the 31st.


Picked it up from the post office today and it appears to have made the trip without any damage.


It'll probably take me a few days to hook it all up and test it, but the quality looks good and I was pleasantly surprised by the speed of arrival.


73!

Re: My BITX40 arrived today, but only the board

Mark GØNMY
 

>Hi all,
>I need some BITX SBL-1 PCBs please. How much does each cost and where do you purchase the PCB as I don't see Sunil's >website these days.
>73ees,PatVU3PAT



Sunils ebay Page
http://stores.ebay.com/FUSION-RADIO-VU3SUA/_i.html?_dmd=2&_sid=221135991&_sop=1




¡ʎɐqǝ ɟɟo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
www.uksmg.org

Re: looking for center frequency of crystal filter and bfo frequency

Bill Meara
 

I measure the BFO at 11.9988 MHz.   I took a very quick look at the crystal filter passband and it seems to extend from 11.9965 to 11.9995, with the "flat" portion of the passband going from 11.9972 to 11.9985.  That would mean that the BFO frequency is well placed, on the upper skirt.  And it does sound good there.   Hope this helps.  73  Bill N2CQR




On Saturday, October 29, 2016 7:08 AM, "dj7oo@... [BITX20]" wrote:


 
Hello,
i am interested in modifying the new BITX40 for use in e.g. 60m-band with using Si5351 oscillator. 
For calculating this, i would be interested in knowing exact center frequency of 12MHz crystal filter and also calculated BFO crystal frequency. 
Who can help to answer this?

73 de Klaus, DJ7OO



info needed to enable fault findind

special@...
 

Ashlar,  is it possible to get the pcb component overlay diagram to help me fault find my bitx40?
Also can you please confirm which schematic  (and where from) is the correct one for the new bitx40? At present I have different versions and none agree with what is on the pub
My board has gone from sort of working but with awful drift to terrible instability to now nothing but a couple of loud instability howls.
The vfo is working and tracking fine over the right range. I checked the trifilar toroid connections as you suggested (a couple weren't good) then today, when I got back from hospital and went to do some more checks the thing now receives nothing. I suspect that one of the broad band rf amps may have gone faulty but without correct board info I'll probably just bin it :-(
Slim G4IPZ


Re: Received My Bitx 40 Today

David Parker
 

Hi DuWayne that is a really nice solution for the case, are you prepared to share your stl file for those of us with 3d printers?

David Parker
Platform Engineer

d. +64 9 916 7495 ­
m. +64 21 245 1959

[tvnz-horizontal.jpg]






From: BITX20@... [mailto:BITX20@...]
Sent: Tuesday, 1 November 2016 4:41 p.m.
To: BITX20@...
Subject: [BITX20] Re: Received My Bitx 40 Today



Received mine Saturday, serial number 134. Box was a little worse for ware, but no holes and everything inside was in perfect condition. Spent the last two days getting everything around to include the changes I want to make to the construction. Also did the design and 3D printed a case for the unit. Hopefully tomorrow I will have time to get everything assembled and give it a try. I am documenting the build on my blog.
BITX 40 p<http://kv4qb.blogspot.com/2016/10/bitx-40-p.html>


[image]<http://kv4qb.blogspot.com/2016/10/bitx-40-p.html>

BITX 40 p <http://kv4qb.blogspot.com/2016/10/bitx-40-p.html>
I have been gone for a while visiting family, and have not had a chance to work on the projects I have on the bench. One of these is a SMD ...

View on kv4qb.blogspot.com <http://kv4qb.blogspot.com/2016/10/bitx-40-p.html>

Preview by Yahoo




DuWayne KV4QB



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Corrections to the circuit PDF

Ashhar Farhan
 

Many had pointed out that there were some variations between the PDF and the circuit's PNG image on www.hfsigs.com. We have updated that, now both have the same values.

- f

Re: info needed to enable fault findind

vijai george
 

Component layout diagram essential for fault findings


On Tuesday, November 1, 2016 3:52 PM, "special@... [BITX20]" wrote:


 
Ashlar,  is it possible to get the pcb component overlay diagram to help me fault find my bitx40?
Also can you please confirm which schematic  (and where from) is the correct one for the new bitx40? At present I have different versions and none agree with what is on the pub
My board has gone from sort of working but with awful drift to terrible instability to now nothing but a couple of loud instability howls.
The vfo is working and tracking fine over the right range. I checked the trifilar toroid connections as you suggested (a couple weren't good) then today, when I got back from hospital and went to do some more checks the thing now receives nothing. I suspect that one of the broad band rf amps may have gone faulty but without correct board info I'll probably just bin it :-(
Slim G4IPZ



Drift of the BITX40 VFO

Ashhar Farhan
 

Many have noticed that the VFO of the BITX40 is a little 'drifty'. This is because the six bidirectional amplifiers have increased current, each takes 22 ma and they heat up the board, causing the VFO to drift. Here is what you need to do :

What you need to do :
The resistors R12, R22, R32, R45, R55, R65 (six of them, all of them 100 ohms) control the current in the six bidirectional amplifiers. Replace these 100 ohm resistors with 220 ohm resistors.

How to do it :
Step 1: Locate these resistors in the amplifiers around Q1,Q2,Q3,Q4,Q5 and Q6. These are marked as 101, black resistors. You need to desolder these. DONT DESOLDER THOSE MARKED AS '100' - THOSE ARE 10 OHM RESISTOR. Sorry, for the shouting, I thought it was important. 

Step 2: Remove them. My easy way to remove them is to use my regular 25 watt iron and gently press it's flat top over the resistor covering both ends as if it were a shirt that i was pressing with my iron. in a few seconds, the solder on both sides would have melted and you can simply slide the resistor away.
 
Step 3: Replace. The pads on the PCB are large enough for you to solder regular 1/4 watt resistors vertically, Manhattan style. If want, you could solder SMD resistors as well, size 1206. If you don't have them, write to hfsignals@... and they will send you a pinch of these for free.

Why it works:
The board becomes cooler after this mod. It will still take 10 minutes for the drift to stabilize. But don't expect the board to be stable as soon as you have changed the resistors, the heat from all that soldering work has to dissipate before it can be stable.

- f

Re: Received My Bitx 40 Today

chriscoel@...
 

I'm excited to follow your build Duwayne how are you hooking up the counter? 

Hope to see the final product soon

Chris 

Re: Drift of the BITX40 VFO

Ken
 

Is it possible to setup an errata page at www.hfsigs.com ?

Any mods/changes now and in the future can go there.

73

Ken VA3ABN

On Tue, Nov 1, 2016 at 11:55 PM, Ashhar Farhan farhanbox@... [BITX20] <BITX20@...> wrote:
 

Many have noticed that the VFO of the BITX40 is a little 'drifty'. This is because the six bidirectional amplifiers have increased current, each takes 22 ma and they heat up the board, causing the VFO to drift. Here is what you need to do :

What you need to do :
The resistors R12, R22, R32, R45, R55, R65 (six of them, all of them 100 ohms) control the current in the six bidirectional amplifiers. Replace these 100 ohm resistors with 220 ohm resistors.

How to do it :
Step 1: Locate these resistors in the amplifiers around Q1,Q2,Q3,Q4,Q5 and Q6. These are marked as 101, black resistors. You need to desolder these. DONT DESOLDER THOSE MARKED AS '100' - THOSE ARE 10 OHM RESISTOR. Sorry, for the shouting, I thought it was important. 

Step 2: Remove them. My easy way to remove them is to use my regular 25 watt iron and gently press it's flat top over the resistor covering both ends as if it were a shirt that i was pressing with my iron. in a few seconds, the solder on both sides would have melted and you can simply slide the resistor away.
 
Step 3: Replace. The pads on the PCB are large enough for you to solder regular 1/4 watt resistors vertically, Manhattan style. If want, you could solder SMD resistors as well, size 1206. If you don't have them, write to hfsignals@... and they will send you a pinch of these for free.

Why it works:
The board becomes cooler after this mod. It will still take 10 minutes for the drift to stabilize. But don't expect the board to be stable as soon as you have changed the resistors, the heat from all that soldering work has to dissipate before it can be stable.

- f


Re: Drift of the BITX40 VFO

Ashhar Farhan
 

I am setting up a bitx40 blog. We will document all this stuff in there. the bitx20's file section is quite quirky and it requires login to be accessible. 
there are many hacks already coming in. Bill made a very stable outboard VFO, VU2VRL has an Si5351 board that is already popular. It would be best that these are placed as articles in that blog space.

- f

On Wed, Nov 2, 2016 at 9:33 AM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:
 

Is it possible to setup an errata page at www.hfsigs.com ?

Any mods/changes now and in the future can go there.

73

Ken VA3ABN

On Tue, Nov 1, 2016 at 11:55 PM, Ashhar Farhan farhanbox@... [BITX20] <BITX20@...> wrote:
 

Many have noticed that the VFO of the BITX40 is a little 'drifty'. This is because the six bidirectional amplifiers have increased current, each takes 22 ma and they heat up the board, causing the VFO to drift. Here is what you need to do :

What you need to do :
The resistors R12, R22, R32, R45, R55, R65 (six of them, all of them 100 ohms) control the current in the six bidirectional amplifiers. Replace these 100 ohm resistors with 220 ohm resistors.

How to do it :
Step 1: Locate these resistors in the amplifiers around Q1,Q2,Q3,Q4,Q5 and Q6. These are marked as 101, black resistors. You need to desolder these. DONT DESOLDER THOSE MARKED AS '100' - THOSE ARE 10 OHM RESISTOR. Sorry, for the shouting, I thought it was important. 

Step 2: Remove them. My easy way to remove them is to use my regular 25 watt iron and gently press it's flat top over the resistor covering both ends as if it were a shirt that i was pressing with my iron. in a few seconds, the solder on both sides would have melted and you can simply slide the resistor away.
 
Step 3: Replace. The pads on the PCB are large enough for you to solder regular 1/4 watt resistors vertically, Manhattan style. If want, you could solder SMD resistors as well, size 1206. If you don't have them, write to hfsignals@... and they will send you a pinch of these for free.

Why it works:
The board becomes cooler after this mod. It will still take 10 minutes for the drift to stabilize. But don't expect the board to be stable as soon as you have changed the resistors, the heat from all that soldering work has to dissipate before it can be stable.

- f



Re: Drift of the BITX40 VFO

Ken
 

Good idea. I'm awaiting for mine to arrive and also 5351 modules. I would be very interested in a arduino/5351 vfo/bfo setup, but I'm not sketch oriented.

73

Ken VA3ABN

On Wed, Nov 2, 2016 at 12:05 AM, Ashhar Farhan farhanbox@... [BITX20] <BITX20@...> wrote:
 

I am setting up a bitx40 blog. We will document all this stuff in there. the bitx20's file section is quite quirky and it requires login to be accessible. 
there are many hacks already coming in. Bill made a very stable outboard VFO, VU2VRL has an Si5351 board that is already popular. It would be best that these are placed as articles in that blog space.

- f

On Wed, Nov 2, 2016 at 9:33 AM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:
 

Is it possible to setup an errata page at www.hfsigs.com ?

Any mods/changes now and in the future can go there.

73

Ken VA3ABN

On Tue, Nov 1, 2016 at 11:55 PM, Ashhar Farhan farhanbox@... [BITX20] <BITX20@...> wrote:
 

Many have noticed that the VFO of the BITX40 is a little 'drifty'. This is because the six bidirectional amplifiers have increased current, each takes 22 ma and they heat up the board, causing the VFO to drift. Here is what you need to do :

What you need to do :
The resistors R12, R22, R32, R45, R55, R65 (six of them, all of them 100 ohms) control the current in the six bidirectional amplifiers. Replace these 100 ohm resistors with 220 ohm resistors.

How to do it :
Step 1: Locate these resistors in the amplifiers around Q1,Q2,Q3,Q4,Q5 and Q6. These are marked as 101, black resistors. You need to desolder these. DONT DESOLDER THOSE MARKED AS '100' - THOSE ARE 10 OHM RESISTOR. Sorry, for the shouting, I thought it was important. 

Step 2: Remove them. My easy way to remove them is to use my regular 25 watt iron and gently press it's flat top over the resistor covering both ends as if it were a shirt that i was pressing with my iron. in a few seconds, the solder on both sides would have melted and you can simply slide the resistor away.
 
Step 3: Replace. The pads on the PCB are large enough for you to solder regular 1/4 watt resistors vertically, Manhattan style. If want, you could solder SMD resistors as well, size 1206. If you don't have them, write to hfsignals@... and they will send you a pinch of these for free.

Why it works:
The board becomes cooler after this mod. It will still take 10 minutes for the drift to stabilize. But don't expect the board to be stable as soon as you have changed the resistors, the heat from all that soldering work has to dissipate before it can be stable.

- f