Dawson driver board

[fmdx]

Hi can anyone help me with the dip switch codes for a dawson driver board.

[bristolpirates]

I hope this is correct...

Code: Select all

For a working example, see Figure 1.

Multiply your frequency by 10.
Multiply the result by 2.
Write down the result vertically on a piece of paper.
Referring to Table 1, write down the corresponding binary code next to each digit of the result.
Write numbers 01 to 16 down the page.
Write each digit of each binary code down next to one of the numbers 01 to 16 in sequence.
Place the exciter in front of you with the dip switches to the left.
Referring to Table 2, switch all of the dip switches to off and then proceed to switch on all dip switches corresponding to numbers 01 to 16 where you have written a 1 next to them.
As a check, use Table 2 to add up all the frequency values you have switched on and multiply them by 2. This result should equal your frequency.

Table 1 – Binary Codes
 
Digit	Binary Code	   
0	0000	   
1	0001	   
2	0010	   
3	0011	   
4	0100	   
5	0101	   
6	0110	   
7	0111	   
8	1000	   
9	1001	 

Table 2 – Dip Switch Positions and Values
 
Bank 1			Bank 2	   
16	.025 MHz	12	.25 MHz	   
15	.05 MHz		11	.5 MHz	   
14	.1 MHz		10	1 MHz	   
13	.2 MHz		09	2 MHz	   
01	200 MHz		08	2.5 MHz	   
02	100 MHz		07	5 MHz	   
03	50 MHz		06	10 MHz	   
04	25 MHz		05	50 MHz	 

Figure 1 – Frequency Settings - Working Example

87.9 X 10 X 2 = 1758

1	0001
7	0111
5	0101
8	1000

01	0
02	0
03	0
04	1
05	0
06	1
07	1
08	1
09	0
10	1
11	0
12	1
13	1
14	0
15	0
16	0

Dip switches 04, 06, 07, 08, 10, 12, and 13 should be set to ON, the rest set to OFF.

[fmdx]

I got it going but the dawson ppl was so noisy and the half frequency was so strong. The bored is useless so stripped the coils and trash the rest.

[Maximus]

Looks like some of the component values are wrong:

http://jugglingpirate.net/1w-pll-fm-transmitter/


Sent from my iPhone using Tapatalk

[thewoodstarr]

It was crap in the day. Sorry true.

[thewoodstarr]

You can get it to work, but it is hard work. Even in the 80`s it was old. You need at least an oscilloscope to set it up. Bin it bro!