Bitx Version 3 B Completed Pictures of Printed Circuit Boards

During past few days i was able to complete a Bitx Ver 3 B set Exiter and PA Board .Some pictures are being published here. The RX is working okay and the FLL seems to be correcting minor drift.

I have still to place all the modules in the case for final assembly.

PICTURES OF BITX VER 3 B

 

        BITX VERSION 3B EXITER   

          BITX VERSION 3B PA            

           BITX VERSION 3B SET         

Pictures Bitx Version 3 B

At last we have the Bitx 3 B just about ready to be offered as a Kit.

Its a great moment to share some pictures of the Bitx version 3 B .

The pictures are of the Bitx 3B case, PCB set.. Exiter-PA-AGC Module.

A semi finished Bitx 3 B board is also shown.

The process of packing of Kits is on and very soon the sale will start.

I will also upload a video of the working prototype soon, in fact i had already tested 2 boards

earlier .

The complete manual of Bitx 3 B is not ready,but we have details for all the changes and the
schematics too, which will be uploaded on our website http://amateurradiokits.in very soon.

Best of 73s.

                 BITX VERSION 3 B PICTURES

Bitx Version 3 B PCB's Components Layout

After much hard work for a few months the PCB's for the Bitx Version 3 B are ready. Very soon we will start accepting orders for the Bitx Ver 3 B  Kits.  The case is also ready we will be sharing the pictures very soon.

Highlights for the Bitx Version 3 B

1. Basic Operation 20mt band kit

2. VFO  Varactor Tuned

3. Inbuilt Mic Pre Amplifier

4. Audio Mute on TX

5. No Hissing of RX on receive,as a filter is used in audio to suppress the hissing sound

6. Full connectivity of FLL counter and  control for VFO drift

7. Connection points for Freq Counter FLL Type

8. AGC Module Extra Mounted on VU Meter.

This design is an upgrade from Bitx Version 3.  The original Bitx design belongs to the author OM Farhan from India.

This new design was suggested by a few Italian Hams, we took the Basic design and added further mods.

The design made by Italian Hams did not have the Connections and buffer in VFO for the FLL Freq counter,or the anit hissing filter in the audio amplifier. nor the AGC module, which is mounted on back of a VU Meter. So we had to do a lot of testing after making several boards and testing them we finally made these boards.

The good news is that the Manual is being made by OM Leaonard , who has a great experience with the Bitx 3 and Bitx 20a

The Manual may take some time. The basic manual is same only with certain changes in the VFO, Audio and TX Pre amp. So we will presently provide with some head on start notes.

PICTURES OF  BITX VERSION 3B  PCB

                                                                   BITX VERSION 3 B

                                                                   AGC MODULE  

 

AGC MODULE  

                                                            LINEAR AMP

Bitx Ver 3 Built By Paul Cotton

We are glad to share some great pictures of Bitx version 3 as built by OM    Paul Cotton  2E0ELF

from U.K

Paul has built the Bitx 3 with The IK3OIL FLL Freq counter and VFO for 20 Mt band.

Great job Paul, we wish you many qso's with your Bitx Version 3.

Low RF Gain In Bitx 3

If you experience low gain in RF amplifier of Bitx 3 Or Bitx Multiband then please check out the

2SC2570.  We request you to kindly change the 2SC2570 .

I have had problem sourcing  good quality 2SC2570 and some of you may have had the
one with low gain, supplied in the KIT

If your 2SC2570 is not as per the picture below then kindly change it with 2N3904. You would need to change the PIN connections for 2N3904 .

The picture below is of a good quality 2SC2570 if you are having this type it is  ok. The lot number is also given on the transistor.

2SC2570  THIS ONE IS OK . 

I could not get a good picture of the one with low gain, as the marking is not good on it, i will post a picture of it soon.

New Store For Shop.Amateur Radio Kits.In Opened.

It gives me a great pleasure in informing my  friends that our store shop.amateurradiokits.in  has been opened.

We are constantly adding new  products. our aim is to provide a vast range of products.

kindly register and subscribe  to our store newsletter for any new updates.

Thanks and best wishes 

DE VU3SUA

Sunil Lakhani

New Version Of Bitx Version 3 Demo

The Bitx Version 3 New Version PCB is to be launched soon.

The following changes have been made:

1. Varactor tuned VFO with connection of FLL freq counter. We have a video below showing
    a demo with the new Bitx 3 version connected with the IK3 OIL FLL Counter but the VFO is of
   bitx with some changes. The first transistor is BF245 with varactor diode tune,covering complete
   band.

2.  Mic Pre amp stage has been added to now its quite sensitive .

3. Increased Audio output.

4. Audio Amp mute as the PTT is pressed , this was required for keeping the relay from making a noise
   on pressing PTT.

4. Point for connecting optional AGC and CW.


More news soon.

Enjoy the video posted below in New Bitx Version 3 coming soon.