RF Amplifier Bitx 20 ready !

Second part of the Bitx20 is ready, the RF-amplifier .. and tested.
Also the third part, VFO is finished about 90 %
On the next pictures you can see the results .. in de download section you will find
the latest new (dutch) written so far.

In the VFO, I have changed a little the C’s for ceramic one’s (in the kit their are polysterene one’s) because they fit better on the PCB.

RF Amplifier        VFO
.: RF-Amplifier                                      .: VFO – first stage

In the VFO section the 36 V zener is replaced by a 33 V (no why ?) .. and I have to find out if a VFO test in this stage of the build is OK or not.

Coming next .. the VFO on test!


Bandpass filter Bitx 20 is ready !

First part of the Bitx20 PCB is ready, the Band Pass Filter’.

The use of the ‘ polysterene’  capacitors is a little weird, the final test we give the
answer after the finished ‘Rf-amplifier’. So far nothing special and started with part2.
See the latest changes in de download section of this site.

Step 1 Bitx 20 ready



Start with the Bitx 20 meter transceiver

Started with the building of the Bitx20 Tranceiver.

First with the ‘Band Pass Filter’ the L1,L2 and L3 are fixed well ..
The next picture will give the finished part of the PCB. The capacitors I’ve changed a little bit for higher quality. The 33 pF cap. is changed for the 39 pF !

In the download section you can find the (writing in the same time of building)
‘dutch manual .. of the Bitx20’, every time updated after checking the parts etc.

Received parcel
.: Received the parcel with all the hardware!


CAT interface FRG8800

First homemade project ready,

Finished the CAT-interface for the FRG 8800 Receiver. This small project is easy to make I used the schema from J.F. Kok with the MAX 232 and his ‘special made’ software to handle the RX.

The interface is made in the ‘open space’ of the 144 Mhz transverter who is not in my RX .. if you have installed the ‘transverter’ you have to made an external box. The power for the interface, will get from the RS232 connection of the PC.

Pictures of the project:

Schema of the interface

All parts          Base position
.: All parts                                               .: Base position

Interface ready          frg8800_ready
  .: Interface ready                                   .:  Back of the FRG8800

You can make connection to the RIG with the RS232 settings: Com port: 4800 Baud,n,8,2
A nice small (windows) program who worked together with the RX is one from 2007, Johannes Franciscus Kok (in the blog) you will find information how to operate this (freeware) CAT/Memory software on Linux-Mint.