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Fusebreaker
Intermediate Member Username: Fusebreaker
Post Number: 188 Registered: 3-2004
| Posted on Saturday, September 17, 2005 - 11:27 pm: |
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1.Adjust VR1 for maximum recieve.(will see big improvement). 2.Set the radio to channel 20,Key the radio,Adjust L14 for right on 4.0 watts of carrier. 3.Solder a 150k ohm resistor across the PA and external speaker solder lugs. 4.Turn mic gain(dynomic) to max,say 1-2-3 in your regular voice dont scream!!!,Adjust vr4 until the modulation is loud with 0% distortion. if it is set to high the tune up is worthless and you might as well toss the radio out the window. 5.By removing the resistor it disables the talk back but if you want you can leave it in the radio.(Leave It).If you get a high pitch sqeel when you talk change the resistor to a 200k ohm or high until sqeel is gone.In order for your radio to be tuned correct the owners voice and mic type play a big part if you go from a power mic to an RK-56 type noise cancel mic then your modulation will be to low so if you change your mic readjust Vr4 then it will work with the same modulation as you had before the new mic. If you exceed 4 watts carrier then its likely your modulation will swing the power of your radio down instead of forward then you just wasted the tune up. Say you set the carrier to 6 watts well it will go from 6 watts down to 2 or 3 watts wHEN you modulate.Swing is not everything but there is a balance that must be respected to make a radio operate correctly.FROM MY EXPIERIENCE A 4 WATT CARRIER THAT SWINGS TO 7 OR 8 WATTS IS PERFECT BUT OPIONIONS VARIATE SO THIS IS A GUIDE IF YOU USE IT THE LADY AT THE MCDONALDS 2 BLOCKS AWAY WONT HEAR YOU AND IF YOU DONT WANT THE FFC TO KICK YOUR DOOR IN WITH A WARRANT THEN FOLLOW THE MODULATION RECOMMENDED. I GOT BORED LOL HOPE SOME ENJOYS THIS |
Dragon883
New member Username: Dragon883
Post Number: 4 Registered: 2-2019
| Posted on Saturday, November 14, 2020 - 11:47 am: |
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For those of you reading this... vr1 does NOT increase your "receive"... it only turns up the METER DISPLAY. |
Charliebrown
Advanced Member Username: Charliebrown
Post Number: 735 Registered: 10-2002
| Posted on Sunday, November 15, 2020 - 11:29 am: |
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what does soldering a resistor across the pa do ? I never heard of that one |
Bobicpfan2
New member Username: Bobicpfan2
Post Number: 7 Registered: 8-2011
| Posted on Saturday, April 10, 2021 - 4:44 am: |
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VR2 is the S meter adjustment. NOT VR1. disregard what Dragon883 said CharlieBrown - the resistor adds talkback |