DX949 +/- 5khz switch?

[BammBamm]

I know on many 10 meter radios a 10khz switch is common and I know that unlocking the clarifier on my 949 will allow it to slide pretty far but will cause more drifting issues. So can a switch be installed for a +/- 5khz like the 10khz ones in many 10 meter radios? If so could someone point me towards some information or even a shop that could do this? I'm not afraid to do this myself but don't know where to begin. I've googled this ? but the results didn't get me very far.

 

[Robb]

There may be a 5kc switch mod available for it; but the real problem us that the radio will still drift. Finding the 5kc mod/switch and doing it will be the next step. I will try to look around for it. If I find it, I will post it here . . .

To cure the drift problem isn't cheap and it isn't really a cure either. You must replace two of the three crystals (not the 10.400mhz/reference oscillator crystal) in the radio with some high quality/stability crystals (about ~$20 each!) and then have the radio re-aligned. Again, it is not a cure - just a big band-aid. It will still drift, just a lot less. Do you want to stay with this radio? Then that is what you may want to do.

 

[BammBamm]

Wife bought this radio for me for Christmas and I'm catching hell for wanting it so bad and now wanting to sell it less than 6 months later. Should have asked for a better radio.:headbang

 

[office888]

Wife bought this radio for me for Christmas and I'm catching hell for wanting it so bad and now wanting to sell it less than 6 months later. Should have asked for a better radio.:headbang

RCI2950/2970 are both very stable, work great on SSB, and have a regular old VFO...no channel skip.

 

[office888]

Wife bought this radio for me for Christmas and I'm catching hell for wanting it so bad and now wanting to sell it less than 6 months later. Should have asked for a better radio.:headbang

RCI2950/2970 are both very stable, work great on SSB, and have a regular old VFO...no channel skip.

 

[Robb]

From "CBTricks":
Galaxy Radios DX959 Service Manual

"NOTE:
Exercise a great deal of care with this mod especially with cutting the trace as specified!
Due to the placement, size, and close proximity of the surrounding traces.
If done wrong you could destroy the PCB and / or the PLL chip.

If you have even the slightest doubts or the proper equipment , it would be wise to have someone else you trust perform the mod for you.

SO TAKE YOUR TIME AND DOUBLE CHECK YOUR WORK!!!!"

"Changing the logic level of pin 16 on the RCI 8719 PLL chip will give you a +10kc or -10kc depending on channel selector. Cut the trace at pin 16 as shown and bridge the cut with a 4.7K ohm resistor. You can then wire the center contact of a spdt on-off-on switch to the PLL pin side of the 4.7K resistor Pin16. Wire one outside contact of the switch to Pin 9 for 8 volts and the other outside contact to Pin 18 for board ground." ~end of CB Tricks quote...

Please be aware this is for 10kc's; not 5kc's. My mistake for saying 5kc's on my first post. It is also for the 959; but the boards should be the same - IMO. This wont help you out UNLESS using a 10k ohm variable resistor in the place of a 4.7k ohm fixed resistor will affect the frequency. I don't know - never done this mod. Perhaps someone else can figure out what this installed resistor is supposed to change.:headbang

You can always call a Galaxy Tech up on the phone and ask him - too . . .

 

[tshows]

Wife bought this radio for me for Christmas and I'm catching hell for wanting it so bad and now wanting to sell it less than 6 months later. Should have asked for a better radio.:headbang

BammBamm sorry to hear you are not happy with your DX949. I got mine about 18 months ago (it's actually a refurb from one of the online shops) and have been very happy with it. Hope everything works out.

 

[wavrider]

5 KC? I may be wrong and probably am but it is a binary counter and it counts in 10's per say so getting a 5kc drop would either require a "sliding clarifier mod" or a different crystal to make it 5kc lower or higher. Then you would loose the normal 10's frequencies.

I have done a few 959's and the clarifier does not "slide" 5 kc or at least I have never got one to slide that far, you may be able to put an 8UH choke in the circuit and get it to slide more but then it would probably be unstable.

Best to leave the clarifier in tact and let the vfo do the frequency changing. Except it does not have a VFO

 

[BammBamm]

It's not that I'm not happy with it, I just get tired with the drift on SSB of having to retune. That and I want to slide 5khz to hit the .xx0 channels or am I wasting my time with hitting the .xx0 channels? All that is done to my 949 is a matrix faceplate sticker from Deb's, peak and tune, 2 micro switches for extras, and the meter light has been changed to green and I use a Turner +3B base mic. I do like my radio but those other channels just keep eating at me. And Robb after explaining to my wife she agreed to the following with tax return this year 1/2 of it to go to furnishings for new home that she gets to pick but I get a say with and the other half for any new radio equipment that I want! She also said I could spend $30 a week on radio stuff if I would just quit smoking.....That ain't going so well.:thumbdown:

 

[Carl]

no 5k available without having the clarifier slide and making ssb useless unless you can source a small 10 turn pot. that will work for 5k and regular tuning, but finding a small one will he hard and expensive. they haven't made small ones in 15-20 years and when you find them the correct ohm range they are around $30. if you dont mind the knob on top a big one wlil work, or it will wok in a base chassis.

 

[unit_399]

This wont help you out UNLESS using a 10k ohm variable resistor in the place of a 4.7k ohm fixed resistor will affct the frequency. I don't know - never done this mod. Perhaps someone else can figure out what this installed resistor is supposed to change.:headbang

Robb -

Pin 16 is ope of the programmable divider inputs. It is always pulled to ground througn a 1k ohm resistor in RA1 resistor array. In the event that the channel selector has this pin at logic 1 (8vdc), the 4.7k ohm resistor provides additional isolation for the 8 volt supply, and prevents it from being shorted to ground if you use the 10kc switch to pull pin 16 to logic 0. I hope this makes sense. 73s.


- 399 "J.J."

 

[BammBamm]

I think I'm just going to live with this until after tax return this year and then upgrade the whole setup.

 

[C2]

I would be careful with the 10kc switch mod as I've heard it could blow the pll.

plowboy had a 10.2 ref osc mod, either variable or fixed. His site is gone, maybe someone has it?

http://www.worldwidedx.com/tech-repair/23855-plowboys-mods.html

 

[wavrider]

LESSCOMM has the kit for the channels and also includes the 10kc mod, no cutting, no hacking, no soldering, plug and play but the radio will need an alignment after the mod is installed.

 

[9C1Driver]

The 949 is such a low dollar radio get a basic peak,tune,and unlock the clarifier. Beyond that don't waste your money. A 5kc mod would be pointless, never heard of it anyway.