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Message |
    
Freebird
Intermediate Member
Username: Freebird
Post Number: 282
Registered: 1-2003
| | Posted on Friday, October 28, 2005 - 9:38 pm: | 
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My Galaxy Saturn Turbo has a receive problem on sideband eveyone sounds distorted like the speaker is blown out but the thing is the speaker is fine.And on AM everything sounds clear and my friends galaxy 88 has the same problem does anyone know what this is or how to fix it? |
Freebird
Intermediate Member
Username: Freebird
Post Number: 283
Registered: 1-2003
| | Posted on Saturday, October 29, 2005 - 3:06 am: |
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I have another question for the same radio the Galaxy Saturn Turbo.What ajusts the RF GAIN inside the radio?The guy who had it before me turned it up to high now someone that would give me a 7 will give me a 10 now.How do i fix this 808?thanks |
Freebird
Intermediate Member
Username: Freebird
Post Number: 286
Registered: 1-2003
| | Posted on Sunday, October 30, 2005 - 6:33 pm: |
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Seems like i stumped the tech? |
Freebird
Intermediate Member
Username: Freebird
Post Number: 299
Registered: 1-2003
| | Posted on Friday, November 11, 2005 - 3:28 am: |
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Is there really any techs here at all?you must know some reason why this radio is doing this. |
Tech808
Moderator
Username: Tech808
Post Number: 8329
Registered: 8-2002
| | Posted on Friday, November 11, 2005 - 2:24 pm: |
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Freebird,
Here is the Receiver Alignmnet information.
Receiver Alignment:
1. Receiver Setup: Put the mode selector on AM, the RF gain fully clockwise (maximum gain), squelch to minimum (unsquelched), volume at 2 o'clock, set frequency to 28.295 MHz, and NB/ANL to OFF. Connect signal generator set at RF carrier frequency of 28.295 MHz, AM modulated with a 1 KHz audio tone at 30% modulation level.
2. AM Sensitivity:
Connect a SINAD meter to the external speaker jack.
Adjust L3, L4, L6, L7, L8, L10, L11 and L12 for best SINAD.
Increase the RF generator to 1mV RF carrier level.
Adjust L3, and L4 for minimum distortion.
Verify that the receiver AM sensitivity is better than 0.5µV for 10 db SINAD.
3. FM Distortion:
Change the RF generator to the FM mode, 1mV RF carrier level, FM modulated with a 1 KHz audio tone ± 3 KHz modulation level.
Adjust L5 for minimum distortion.
4. USB Sensitivity:
Turn off the audio modulation of the RF generator, and change it's frequency to 28.296 at an RF carrier level of .5 µV. Set radio to USB RX mode.
Adjust L11 and L12 for audio output greater than 2V.
5. LSB Sensitivity:
Keep the audio modulation of the RF generator off, change frequency to 28.294 at an RF carrier level of 1mV, set radio to LSB mode.
Adjust L11, and L12 for audio output greater then 2V.
6. NB Adjust:
Set radio to 28.305 MHz AM RX mode, NB-ANL/OFF switch to ON, adjust RF generator to 28.305 MHz with an RF carrier level of 1mV, AM modulated with a 1 KHz audio signal at 30% modulation. Connect a digital voltmeter to TP1 (R11).
Adjust L1 and L2 for DC Voltage to max ( 1.3V ).
7. AM Scale Meter:
Turn NB-ANL switch to OFF, SWR/S/RF switch to S/RF position, set radio frequency to 28.305 AM RX mode, RF signal generator setting 28.305 MHz with a carrier level of 100 µV, AM modulated with a 1KHz audio signal at 30%.
Adjust VR1 so that bar graph reads 6 bars.
8. USB Scale Meter:
SWR/S/RF switch to S/RF position, set radio frequency to 28.495 MHz USB RX mode, RF signal generator setting 28.496 MHz with a carrier level of 100 µV, no audio modulation.
Adjust VR2 so that bar graph reads 6 bars.
9. AM Squelch:
Set radio frequency to 28.495 MHz AM RX mode, SQ control fully clockwise, RF signal generator setting to 28.495 MHz , RF carrier level at 1 mV, AM modulated with a 1 KHz audio signal at 30%.
Adjust VR4 very slowly until squelch noise just goes off.
10. SSB Squelch:
Set radio to 28.495 MHz USB RX mode, SQ control fully clockwise, RF signal generator setting to 28.496 MHz , RF carrier level at 1 mV, with audio modulation.
Adjust VR3 very slowly until squelch just goes off.
This completes the Receiver stage of the alignment procedure.
You can get the Complete Alignment information on the Rangerusa.com site under the 2990 Information.
Hope this helps,
Lon
Tech808
CEF808
N9OSN |
Dmlock
New member
Username: Dmlock
Post Number: 3
Registered: 4-2004
| | Posted on Friday, November 11, 2005 - 7:10 pm: |
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galaxy had a factory problem Two of the caps were switched on the circut board SYMPTOM -- Distorted receive on SSB
PROBLEM -- C43 has a 1pF capacitor installed which should be replaced with a 10pF, and C89 has a 10pF capacitor installed which should be replaced with a 5pF.
SOLUTION -- The easiest and quickest cure is to simply switch the two capacitors. Even though the schematic shows C89 as a 5pF, the 1pF works just fine. Realign L15 and L16. |
Freebird
Intermediate Member
Username: Freebird
Post Number: 314
Registered: 1-2003
| | Posted on Monday, November 28, 2005 - 11:54 pm: |
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thanks guys ill give it a try.hope it works!  |
Freebird
Intermediate Member
Username: Freebird
Post Number: 415
Registered: 1-2003
| | Posted on Thursday, May 18, 2006 - 5:20 pm: |
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dmlock I have been looking for this post I took my turbo and had it aligned but still sounds distorted I will print out what you said and show my tech.Not sure if he will have to order those parts or not?I really like the turbo and want to keep it but I don't like that fact that everyone on sideband sounds like my speaker is blow out when its not I even tried and external speaker still the same.where did you find this info out anyway? |
Cactus_29
Junior Member
Username: Cactus_29
Post Number: 38
Registered: 12-2009
| | Posted on Wednesday, April 18, 2012 - 1:15 pm: |
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Thanks for the info on the caps in the ssb if sensitivity section, I'm repairing a saturn turbo that had the same problem and now I have clean receive audio on ssb. Thanks Dmlock |
Fusebox369
New member
Username: Fusebox369
Post Number: 2
Registered: 7-2009
| | Posted on Friday, May 04, 2012 - 11:59 pm: |
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I have a Saturn Turbo with a noisy receive. Any ideas on how to quiet it down? My other radios show half a s-unit of noise while the Saturn has 5 |
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