Bitx Version 3 For 20 ,40 And 80 Mt Bands By Ross Bell VK3BEL

 

Bandpass Filter PCB

Low Pass Filter PCB And LSB /USB PCB

Our Australian friend Om Ross Bell VK3BEL is doing wonders with Bitx Version 3.

Ross likes keeping his Bitx simple and as original design, that is without a digital readout.

Ross has successfully made the Bitx for 3 Bands presently that are 20 and 40  and 80 Mt Bands, with modules provided by us for LSB/USB Change, which is a small pcb mounted above the Bitx Main Pcb BFO.

The second PCB is the Bandpass Filter, that is made for 2 Bands and additional PCB can be added for extra bands.
The third PCB is for the LPF also for 2 Bands.

We also have a PCB for using in Crystal Filter that can be used for Changing Filter For suitable use, ie CW.

We are publishing pictures and statement on Bitx  Version 3 for 3 Bands use as per Ross Bell.

Suggestions And Comments as per OM Ross Bell VK3BEL 

The bandpass coils were all wound with #39 wire on the same as the
20mtr coils supplied, a fiddly job.
for 40 mtrs 18 turns / 3 turns with the capacitance values being 82p
in parallel and 8.2p in series with the coils.
for 80 mtrs 21 turns / 4 turns with the capacitance values being 270p
in parallel and 22p in series with the coils.
For the VFO ,I multi tapped the tuning inductor for the required
2.7-3mhz ,4-4.5mhz and 6.2-6.5mhz,  75, 51 and about 28 turns for all
the bands.
To set up the bandpass filters, i connected them with coax to a
receiver and tuned the coils for maximum signal on the required bands,
only a small adjustment was needed after installing in the bitx.
It is great to have 3 bands, always a signal.....
great fun...
Thank you...


Hi,
I replaced all vfo caps with npo's , waxed the coils to the pcb and
also found the replacement of the zener with a 3 terminal regulator to
be much better frequency stability.I also placed a copper shield
around the vfo and the stability is good. I use the set all the time
and plan to go portable soon. all three bands are working well.

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Well we thank Ross Bell for his Bitx Version 3 operating on three bands and wish Ross all the best for his Bitx version 3 for other bands too. :)  Cheers!

ALL DUE CREDIT TO OM TONY FROM UK FOR PROVIDING DESIGN FOR BITX ADD ON MODULES

Bitx 3 Mono Bander 7 & 14 Mhz By Om Ross Bell VK3BEL

We have our latest Bitx Version 3  pictures coming from Australia sent by OM Ross Bell VK3BEL .
Ross has done an extreme good job in making the Bitx 3 for 2 bands 7 and 14 Mhz and he plans to make
it for 3.5 Mhz also . Ross had purchased the Bandpass  and low pass PCB from us and he is the first one
to use them . As more details come in from Ross I will keep posting for all friends.

Ross has already had a few contacts with his Bitx. He has some drift but that would be solved by using NPO capacitors in VFO.

Here are the pictures of Bitx Version 3 By OM Ross Bell VK3BEL

Great Looks 

 

Smart Building

 

 

Its Here Bitx 3 Mono Bander 7 & 14 Mhz