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4 tube amp Identification
- Thread starter darticus
- Start date
- Status
k3cfc
Silent Key
This is a homemade amp.
zzdiesel
Member
Damn, that dak radio is too sweet! I always wanted one but never got to get one.
Hello Darticus:
During the Hay Days of Big CB Equip Sales and such, Many manufactures, hams, and others made linear amplifiers for the CB Band. Many did not have make or model numbers or schmatic Diagrams come with them.
This unit probably has old TV Sweep Tubes, that at the time only cost a few bucks each. But now I have seen stupid prices as 70 dollrs each. This had made the sweep tube amps obsolete or put on the shelf for looks.
If this amp uses transistors I would use a good Low Pass Filter and groung it. With tubes also.
Many have built amps with the real "Transmitting Tubes" such as the 4CX250B or 4CX400 or 4CX800,
3CX800 or 3CX1500 tubes. These tubes surly cost more but last years and years of proper service.
If the amp use tubes then back down the drive to save the tube life. The difference from say 400 watts out to 200 watts is almost not noticable.
Jay in the Mojave
During the Hay Days of Big CB Equip Sales and such, Many manufactures, hams, and others made linear amplifiers for the CB Band. Many did not have make or model numbers or schmatic Diagrams come with them.
This unit probably has old TV Sweep Tubes, that at the time only cost a few bucks each. But now I have seen stupid prices as 70 dollrs each. This had made the sweep tube amps obsolete or put on the shelf for looks.
If this amp uses transistors I would use a good Low Pass Filter and groung it. With tubes also.
Many have built amps with the real "Transmitting Tubes" such as the 4CX250B or 4CX400 or 4CX800,
3CX800 or 3CX1500 tubes. These tubes surly cost more but last years and years of proper service.
If the amp use tubes then back down the drive to save the tube life. The difference from say 400 watts out to 200 watts is almost not noticable.
Jay in the Mojave
darticus
Member
darticus
Member
I collect amps etc. but don't use them so thats legal I think. I sometimes use them on ham radio.
Messed up NOW by Hurricane Sandy but get dsl sometimes. Found more info as that amp arrived. It uses four 12GB3 TUBES. Maybe that helps and its made by Mini-Max Xeron. See the pics and maybe someone can tell me something about this 550watt amp. Thanks Ron
Messed up NOW by Hurricane Sandy but get dsl sometimes. Found more info as that amp arrived. It uses four 12GB3 TUBES. Maybe that helps and its made by Mini-Max Xeron. See the pics and maybe someone can tell me something about this 550watt amp. Thanks Ron
Attachments
zzdiesel
Member
I remember the biggest I ever had & used. It was a Phantom 500. It would easily swing 1250 watts. I reached out & touched someone. It dimmed every light bulb in the house when I keyed up that D-104. This was back in 1992.
jim202
Member
Not what I would call good construction work. Someone in a high school electronics class should have been able to walk circles around the person that built this.
zzdiesel
Member
Most I ever were saw were kits, but they'd still "walk the dog & kick the cats"
darticus
Member
Thanks! That picks my hopes up. Bet you look like crap also. Thanks for the input! Your a BIG HELP! I tought High school and they couldn't solder in a tube. Ron
Sorry dart, but I have to agree with jim.
Amplifiers like that are almost always poorly constructed and do not have a low pass filter or a tuned tank coil either.
And as mentioned, IF you're not a licensed amateur radio operator then mere possession of that amp can get you fined even if you're not using it.
and you "tought" high school? Really? I think maybe taught is the word you were looking for right?
73,
n9zas
jim202
Member
Well if you were the teacher, then it was up to you to give them the skills they needed. Learning to solder is one of the first steps that I was taught. After that we learned about resistors, capacitors, inductors, tubes, transistors, voltage, current and Ohms Law.
Once we managed to digest all of that, we actually built simple circuits and measured the voltage and current through the different components. Think about 2/3 of the class actually got interested in ham radios and took the test. Believe it or not, there was a 100 percent passing of the ham license the first time around. Have to pat our teacher on the back. He managed to take a number of students that had no clue what a resistor even was and they walked out of his class understanding how a radio actually works.
darticus
Member
Sorry, taught! I guess I screwed up. I did teach HS for 28.5 years tooo old now. I guess if the amp works its worth 50 bucks on ebay just for the case. I guess its good I'm licensed Thanks Ron
Sorry dart, but I have to agree with jim.
Amplifiers like that are almost always poorly constructed and do not have a low pass filter or a tuned tank coil either.
And as mentioned, IF you're not a licensed amateur radio operator then mere possession of that amp can get you fined even if you're not using it.
and you "taught" high school? Really? I think maybe taught is the word you were looking for right?
73,
n9sas
Last edited:
darticus
Member
k3cfc
Silent Key
Sorry dart, but I have to agree with jim.
Amplifiers like that are almost always poorly constructed and do not have a low pass filter or a tuned tank coil either.
And as mentioned, IF you're not a licensed amateur radio operator then mere possession of that amp can get you fined even if you're not using it.
and you "tought" high school? Really? I think maybe taught is the word you were looking for right?
73,
n9zas
You are wrong about having this amp. this amp is not legal for use on any band but you can still have it as long as you don't use it.that's like saying you can't have a ham radio unless you have a license. there is no law saying you can't listen.
loumaag
Silent Key - Aug 2014
Topic Closed
I am going to close this topic based on a report received. Normally I would just deal with the person who was causing the trouble, but since there are several problems here I am going to derail any further discussion.
I will say this, there is entirely too much antagonism in this topic and to be fair the worst offender is the reporter, since you know who you are, consider yourself lucky you are not being racked across the infraction system. If you didn't place the report, then consider what you typed here, there is more crap spouted in this short topic than I have seen in long time. In the future, if you don't know what you are talking about, I suggest you keep your fingers off the keyboard.
I am going to close this topic based on a report received. Normally I would just deal with the person who was causing the trouble, but since there are several problems here I am going to derail any further discussion.
I will say this, there is entirely too much antagonism in this topic and to be fair the worst offender is the reporter, since you know who you are, consider yourself lucky you are not being racked across the infraction system. If you didn't place the report, then consider what you typed here, there is more crap spouted in this short topic than I have seen in long time. In the future, if you don't know what you are talking about, I suggest you keep your fingers off the keyboard.
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