Is anyone aware of a linear amplifier usable with an SSTran 3000T? I think I found one, but it's looking for a 50 ohm input...SSTran is nowhere near that, is it?
Is anyone aware of a linear amplifier usable with an SSTran 3000T? I think I found one, but it's looking for a 50 ohm input...SSTran is nowhere near that, is it?
I am not sure of any ham or qrp linears that will work with an input of 100mw but if you have found some then list them and I will look into the design. The problem with linear amps is that they don't really amplify as much as using a more direct amplifier and high modulating it. Though don't get me wrong, it can be done, but you will need an amplifer that not only amplifies the carrier power but will also handle full modulation power. Most homebuilt amps can be designed without no problem to do this. But as far as something you can buy prebuilt is not as easy. The problem is that most 160 meter amps even for QRP operation need more then 100mw to drive. The only real way around this is home built. I suggest you find someone who can build you an amp. But hopefuly someone can help you here because I drank a 4 pack at the moment lol . The best way to setup an AM transmitter is to push a carrier right up to the output stage and then modulate it, or else you will not only have to worry about the carrier but the modulation and how sound it is at the output. With High Level modulation you will be able to push any kind of AM signal regardless of sinewave output and modulate it properly and trust me with makeshift antennas it's always best to go with high level modulation. The only time low level modulation works well (taking a 100mw transmitter and linear amplifiying it) is when you know the exact design of the output filter and antenna system, or else you will end up with messy modulation that will sound like shit. Hehe, hope that helps some.
We had a Panaxis AM transmitter at the station with a 100 milliwatt output into 50 ohms that drove a 5watt amp. The Panaxis is still in a class by itself when it comes to being a very loud transmitter without distortion, in fact you could modulate it up to 300% and still have a clean deep bass sound.
The Aspisys AM stereo transmitter is capable of 400 milliwatts with a 50 ohm output and has an amp available for it www.aspisys.com/ampll.htm There is a review for it on www.hobbybroadcaster.net/ Unfortunately for now there is not much to choose from AM transmitters, however that is about to change when PCS releases its way overdue AM transmitter AM Max3. There are going to be amps available for it, with levels up to 500watts. With all the AM's going dark, allot of space is opening up.
You are hearing here first! We are working on recreating the Panaxis AM transmitter, we have an original XMTR, and plans in hand. Ours will have some improvements included like a trimmer cap for the crystal, the transistors will also be upgraded. Stay tuned!
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