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GE Superbase tuning

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Turk182
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GE Superbase tuning

Post by Turk182 » Saturday, 26 August 2017, 17:57 PM

Couldn't find info on Google, just need to know how to tune down my rig to 2W max so as not to fry my NIB KL-405. Specs says it handles up to 10w AM/20W SSB. Rather push it with too little than too much. Any good advice is appreciated in advance.
182 on the SW side of the Sandpile....73's




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MDYoungblood
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Re: GE Superbase tuning

Post by MDYoungblood » Sunday, 27 August 2017, 7:23 AM

On the GE SuperBase ( 3-5875A), the AM power potentiometer is VR10 (could be RV10 depending on the board), you shouldn't have to mess with the SSB ALC but in case the pot is VR20 (RV20 same). Don't go below 2w DK on AM.

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Turk182
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Posts: 26
Joined: Sunday, 15 June 2014, 6:30 AM
Radio: GE Superbase
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Name: Harry
Location: SW FL

Re: GE Superbase tuning

Post by Turk182 » Sunday, 27 August 2017, 11:17 AM

Many thanks, you saved me lots of digging. Found the schematic for the GE on CBtricks.com, just didn't know exactly which pot to look for. Wish there was a good CB shop here in SW FL, but as we all know, they're getting tougher to find these days. They could put it on an oscilloscope and fine tune it. I'm far from a skilled tech, but I realize there's more involved than just turning down the power. With a Silver Eagle on it, I might want to keep the wattage and modulation a little lighter than too heavy. Always got "good, clean" signal reports anyway during skip running barefoot. 73's.
182 on the SW side of the Sandpile....73's



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MDYoungblood
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Re: GE Superbase tuning

Post by MDYoungblood » Sunday, 27 August 2017, 11:28 AM

The modulation pot is VR9, look to make sure C71 is still there and connected, if not I would replace it.

3's

Greg
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"321, the Middle of Maryland"

23 AM "WORLD Image WIDE" 38 LSB

Strong Supporter of America's Original Homeland Security Act
The Second Amendment


Base
Uniden Washington
Mobile
Texas Ranger TR-696FD1C
Handheld
Maxon HCB-40WX
Antennas
Avanti Sigma II
Homemade Full Wave Loop
Homemade 1/2 wave Dipole
Hustler 102" SS Whip and Hustler Ball Mount

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Turk182
4 PILL USER
4 PILL USER
Posts: 26
Joined: Sunday, 15 June 2014, 6:30 AM
Radio: GE Superbase
Antenna: 3 Element Beam Horiz
Name: Harry
Location: SW FL

Re: GE Superbase tuning

Post by Turk182 » Saturday, 30 September 2017, 13:09 PM

Sorry it's taken me this long to get to this project(just survived major hurricane), but tried turning RV 10 in both directions(with non-conductive driver) with no change in watt output on either meter("TX Power" on radio or meter on my MFJ-941D tuner). Now what?
182 on the SW side of the Sandpile....73's




User avatar
Turk182
4 PILL USER
4 PILL USER
Posts: 26
Joined: Sunday, 15 June 2014, 6:30 AM
Radio: GE Superbase
Antenna: 3 Element Beam Horiz
Name: Harry
Location: SW FL

Re: GE Superbase tuning

Post by Turk182 » Saturday, 30 September 2017, 13:58 PM

Update: RV 10 is functional. Meters on both units inaccurate. Hooked up MFJ-868B watt meter and measured 2-1/2 w DK. Should be good 2 go.
182 on the SW side of the Sandpile....73's




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