Galaxy 959
Galaxy 959
Can this radio be converted to 10 meter operation?
Re: Galaxy 959 to 10 meters
I have just check my notes on the DX959V.
I have converted a few DX959V to 10 meters with not to much trouble, the TX power will drop about 1 to 2 watts and the RX will drop to 0.35uV for 10dB on SSB, has you will not be using AM, the AM will not a problem.
Change C52 between 3pF to 5pF and C255 between 2pF to 5pF.
I have converted lots CB radios to 10 meters, this is quite a common practise in the UK.
As the 10 meter band does not suffer too much with pileup as the 11 meter band, the RX should not be any trouble.
I have converted a few DX959V to 10 meters with not to much trouble, the TX power will drop about 1 to 2 watts and the RX will drop to 0.35uV for 10dB on SSB, has you will not be using AM, the AM will not a problem.
Change C52 between 3pF to 5pF and C255 between 2pF to 5pF.
I have converted lots CB radios to 10 meters, this is quite a common practise in the UK.
As the 10 meter band does not suffer too much with pileup as the 11 meter band, the RX should not be any trouble.
Rick.
Rick , I have built kit radios and other somewhat complicated circuits. This will be the first time to actually convert a cb. What xtal will I need and how much of the 10m band will it cover? I have not been able to find much on the internet about this conversion , Seems to be taboo or something. I thought that there would be a few ham sites documenting the conversion. I have 2 hf radios and a htx10, but it is our human nature to modify things. Thanks Matt................
Re: Galaxy 959 to 10 meters.
To work out what crystals you will need, you need to do so maths.
The VCO down-mix for channel 1 is 0.91 MHz and 1.35 MHz for channel 40
The Carrier Oscillator runs at 10.695 MHz
Let us say we need 28.005 MHz for channel 1.
We know that the down-mix for channel 1 is 0.91, the carrier is 10.695, and frequency we need is 28.005.
We subtract 10.695 from 28.005, which is 17.31 now subtract 0.91 and we are left with 16.400 so the crystal we need is 16.400 MHz
To find out channel 40 we do the maths in reverse, we know that channel 40 down-mix is 1.35 and carrier is 10.695, and the crystal is 16.400.
We start with 1.35 plus 10.695, which is 12.495 plus crystal 16.400, which is 28.445 MHz for channel 40.
There is a 3-band add-on board for this radio and you can find more information at CBTricks www.cbtricks.com/radios/galaxy/viagra/index.htm
Some crystals which maybe easy to find
16.260 MHz, which will give you 27.865 to 28.305
16.710 MHz, which will give you 28.315 to 28.755
17.160 MHz, which will give you 28.765 to 29.205
The VCO down-mix for channel 1 is 0.91 MHz and 1.35 MHz for channel 40
The Carrier Oscillator runs at 10.695 MHz
Let us say we need 28.005 MHz for channel 1.
We know that the down-mix for channel 1 is 0.91, the carrier is 10.695, and frequency we need is 28.005.
We subtract 10.695 from 28.005, which is 17.31 now subtract 0.91 and we are left with 16.400 so the crystal we need is 16.400 MHz
To find out channel 40 we do the maths in reverse, we know that channel 40 down-mix is 1.35 and carrier is 10.695, and the crystal is 16.400.
We start with 1.35 plus 10.695, which is 12.495 plus crystal 16.400, which is 28.445 MHz for channel 40.
There is a 3-band add-on board for this radio and you can find more information at CBTricks www.cbtricks.com/radios/galaxy/viagra/index.htm
Some crystals which maybe easy to find
16.260 MHz, which will give you 27.865 to 28.305
16.710 MHz, which will give you 28.315 to 28.755
17.160 MHz, which will give you 28.765 to 29.205
Rick.