BUJJI SLIPPERS

VU2VNK while testing bujji Tx was requesting a little more power and here is the Bujji slippers.

This is IRF510 based amplifier (non Linear), the design is based on 1978 ARRL HAND BOOK.

The below picture is work-in-progress.

A prototype is already built and now it is being relocated into a NUTCASE.

FILTER CHOKE

Good evening,

For one of our project choke is required. we used 24 SWG for making the choke. The resistance of the copper wire is 84 Ohms per Km,
The resistance of cooper wire for 1 meter is 0.084 Ohms. For 8 turns the length of the wire is 62 Cms  is < 60m Ohms. for 8 strands the resistance 6m Ohms. Otherwise the Voltage drop is HIGH when the current is around 20A.
Here we need the voltage drop is below 0.2 Volts.
The choke is implemented in the 40mm core as shown below.

Bujji Tx 3

Dear all,

Bujji Tx serial no 3 is ready with good looking and working best of our satisfaction. In this we used chebyshev low Pass filter to get less loss.

0.1dB CHEBYSHEV L.P.F for Bujji Tx.

Dear all,

0.1dB CHEBYSHEV L.P.F (11t-24SWG) for Bujji Tx  is given below, with a cutoff frequency of 10 MHz, The actual circuit is taken from the ARRL Hand book.

We connected 47E load in the output to the check the performance. The performance is satisfactory. 

BUJJI TX

Season's Greeting to all,

Here we come with a cute (BUJJI) Tx of 500 mW of power. This transmitter work at 7084 KHz or 7079 KHz frequency which is South India's famous LAKE CITY/GARDENCITY NET and CHARMINAR NET. The frequency of the Tx is stable because of the Crystal IF and is designed to operate with 9 V battery, 

The entire Tx will come in the NUTCASE box. Further details of the Tx will be updated soon.