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Search results

  1. D

    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Next time Gadget......Next time.. :) Thanks for the help over the days. I think I will just have to keep an eye out for a good amp that will do good on SSB. Pay once, cry once... :D
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Welp... After putting in the final parts, it sure made for a nice smoke show lol. It was going, but once you connected the radio to transmit, it maxed out the Power supply draining all amperes and the big resistor cooked itself. Enough that it blew the 20 amp fuse. Even after removing the...
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    SuperTiger 40A low modulation fix?

    from my experience, that is the world of the old Cybernet chassis radios. I thought something was wrong with my old 40 channel Midland SSB radio. Nope... Turns out you basically need to yell into the microphone to get any kind of modulation. Power mic is a must, and I forget which potentiometer...
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    Pitting current techs to old techs...

    I for sure am no tech. I can just solder stuff ok and follow directions/guides, but far from 100% understanding whats going on inside the radio. I just know not to clip a limiter and try not to crank the ALC or AMC pot the entire way. :P But otherwise I still would need years and years of...
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    Cobra 138

    Ive had great luck stacking diodes on some of the older General Electric radios with the power mic circuitry built in to lower the deadkey..
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Thank ya!! :) I will wait once the parts roll in and see what I can get in numbers.
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Allright, Think I am getting somewhere... With just the bare amp and none of the added transistor and circuits, it was reading 60 mA with the relay clicked on. This is with the Pre-Amp off Pre-Amp on, it was seeing 135 mA draw with the relay on. With the relay off and no pre-amp, it was at...
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Appreciate the information. Since the amp has a Pre-Amp, should I go ahead and turn it on when I take the mA draw prior? I hardly ever use it or will it not make too much of a difference? I still struggle to understand how the relays are working or what gets them to click on over, but what two...
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Is this where the .6-.7 volt needs to be set? Putting the positive lead from a DMM on the Cathode end or the Annode to set the voltage?
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    Quick and Dirty Class "AB" mod for KL300p

    Do you recall where to put the 2200uF Capacitor? I am working on doing the same to a Comet 200 amp. In that same area in that picture, there is a 470uF 50v capacitor, but is that the one to change to a 2200uF? From what I understood the amp already worked in a sense that either one SSB and AM...
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Bah... No luck on sourcing an RF Choke and a 10w 40 ohm wirewound resistor. I did at least find some .01 50v and .01 100v ceramic capacitors. Will either work or do they need to be closer to 500v rating?
  12. D

    RM-3 MOSFET TRANSISTOR

    Did you have to match a set of IRF530N transistors? Also, did you need to set the gate bias for them? Got a couple of 203P amps that could use a set, but I did put in a variable resistor to set the gate bias.
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Thank you so much! I will correct the transistor. I believe I may have 1/2 watt 1000 ohm somewhere in my parts. My brother has some misc. parts drawers, and I swore I seen some RF Chokes in there! Feels like a large step going towards the right direction. Only question for now is, I thought...
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Going to stop here for tonight. I managed to at least get the parts installed and Microsoft Painted in the missing parts I need to put in. But is this the correct way? The picture is kinda blurry from the thread, but I am assuming the center pin of the TIP42C is right on the 12v, the right pin...
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    I did find some Radio Shack 1N5404 diodes just now in my parts bin. Safe to use those too?
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    Comet 200 amp. Wishing to add SSB AB Bias. Help!

    Hello Fellow CBers! After all these years, I wish I took the time to actually hear my audio on the other end to be sure I was even happy with it. As of recent, I learned that my SSB audio just sounds overall bad on the RM Italy 203P. Best described as crunchy on the peaks. Which set me to try...
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    Amplifier???

    Just wanted to cue the "Riiiiiiiiiiise from your grave!" sound bit from Altered Beast on the Sega Genesis. :)
  18. D

    MFJ-259B

    At this point may as well have a look around that area where the power first comes in. Something like this happened when the wrong power cord was used on a Sega CD attachment. Wish I was more knowledgeable as a kid so I could of had a fighting chance to save it. Hoping something is visible...
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    [Solved] Cobra 148 GTL Malaysia clarifier unlock problem.

    This is the one that he linked me to when I did it to a Grant XL radio last year. Simple Clarifier Unlock Cobra 148 GTL
  20. D

    [Solved] Cobra 148 GTL Malaysia clarifier unlock problem.

    Just to conclude this thread, I tapped into a line that didn't have 8v... :P That would of been helpful the first go around. :)