Galaxy 959 extra channels ?

[dss56]

So I have done plenty of the 959 channel mods and they are on 4 different sections 27.965-26.665 close enough.
I know about the viagra boards-not made anymore.

So i have been reading someones post I saved and seems you can use a oscillator board to add the standard 40 up and 40 down.
use the 15.810 high and 15.360 for low.

I loaded these 2 xtals on to my oscillator board and it will work great on am dead on frequency 27.415-27.855 and 26.955-26.515.

Problem is ssb will not align. The xtals are cut for the 959.
I injected the signal to xtal 4 10.6975 on the 959 and all AM is good not the lsb or usb.

Any suggestions on a location to inject the 15.810/15.360 oscillator signal so that both am and ssb will align.

I cant align ssb with a signal injected because then when no signal the regular ssb will be off.

here is the following post I saved from a site back a few years that mentions using crystals to add extra channels.

THIS POST IS FROM SOMEONE ELSE NOT ME!
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.

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 math 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
15.810 MHZ 27.415-27.855
15.360 MHZ 26.955-26.515

THANKS

 

[nomadradio]

The only way to make the three modes line up in the stock radio is to set the three trimmer coils, one for each mode. The crystal you use for extra channels is now in line with those three trimmer coils.

When you change crystals, those three settings are disrupted. They exist to match the particular crystal you're using. When that crystal gets changed, those three settings change.

This is why the original viagra board had two sets of those three trimmer coils. One set of three for each new band.

As a general rule, an expansion kit comes with a crystal has a trimmer cap on it for each added band. You'll need to choose which mode you want the extra-channels crystal to line up with that trimmer cap. The other two modes just won't fall into place without a separate trim adjustment for each mode.

73

 

[brandon7861]

In one of my junk boxes, I remember seeing an old viagra board with a rusty shield. Not sure which one it is, A or B, or if it even works. I took it out of a radio someone butchered and later scrapped. Should I dig for it? It might still work and I have no plans to use it. No guarantee I can find it, but I'd be happy to look if it gets a second chance at life.