amp

[cbrrider06]

Hey folks kinda of a dumb question??? I just bought a amplifer on of flea-bay and I have no clue as to what freq. it will operate on. Is there any way of looking at the internal components to figure this out?????

 

[k9rzz]

The auction didn't say?

You gotta give us more than that if you want help. Homebrew? Tube or solid state? Commercial? What manufacturer? Does it go in a car, sit on a table, or do you need to knock out a wall to get it in the basement?

 

[N1BHH]

The question I have for you is why did you buy something you know nothing about in the first place? You could very easily be stuck with a brick. Always look it over before buying. Now I think this is a dumb question.

 

[gewecke]

Is it of cathode tube vintage or is it solid state? If it's a tube design then what are the numbers/letters on the tubes? Maybe describe the controls on the front panel? There are many ways to determine what you have!
N9ZAS

 

[cbrrider06]

It is a mobile amp, no other manufactuer labels, the buttons on the front are power, low med hi, pre-amp. The auction did not say but for a 27.00 dollar gamble I will take it.

 

[gewecke]

Maybe take the cover off and tell us what numbers are on the output transistors? That would give us some idea what band it's in.
N9ZAS

 

[cbrrider06]

2 transistors that are sd1446 11c

 

[N4DES]

If there are tags on the unit you can go on the FCC website and look up the type acceptance number.

 

[zz0468]

2 transistors that are sd1446 11c

http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXrxuvr.pdf

Probably some type of HF power amplifier.

No labels? Preamp? Low med high?

I'm reaching here, but my best guess would be a CB type amp.

 

[k9rzz]

Let me approach this from a different angle ... what frequency range do you hope it works on?

 

[cbrrider06]

i am hoping that it will cover 2 meters

 

[zz0468]

i am hoping that it will cover 2 meters

The transistors that you told us were in it are only rated up to 50 MHz, therefor it's not going to work at 2 meters.

 

[kb2vxa]

Rest assured it's a "2 pill" chicken band amp, solid state ham amps use MOSFET modules and their appearance makes them pretty obvious. If it hasn't any tuned circuits but rather as my guess input and output toroids likely it's a push-pull wide band amp that if you're lucky covers basically 3-30MHz it MAY be used to boost the power of a QRP rig or transceiver lowered to 5W, any more will blow it to kingdom come. Mind your harmonics and spurs, those things tend to be dirty so IMO I really wouldn't use such a thing. Another thought and another educated guess, if you lower the rig's output to 5W and use the amp likely it'll bring you back to the 100W the rig is capable of in the first place. <lulz>

"You could very easily be stuck with a brick."
How unkind but at least you tell it like it is, we call mobile amps (VHF in particular) bricks. <more lulz>

 

[kb0nly]

Sounds like another illegal CB amp, brought to you by the pit we know as FleaBay...