Where Can I find the Ramsey LPA 1 amp. fully assembled? I looked on the website, and the cost was $127 + s/h. My opinion is that that's a tad too expensive. Can anybody help me?
Travis Allred,
AM 1610 WBGR-Battleground,Al
Where Can I find the Ramsey LPA 1 amp. fully assembled? I looked on the website, and the cost was $127 + s/h. My opinion is that that's a tad too expensive. Can anybody help me?
Travis Allred,
AM 1610 WBGR-Battleground,Al
Check out Hobbytron ( http://www.hobbytron.com/R-LPA-1.html). They have the LPA1 both as a kit and assembled.
Frank
www.easthillradio.com
yes, go to www.bxiworld.com you can pick up almost any ramsey fm product full assembled. i am not sure about us though
i ordered a ramsey lpa1
and my range with the TM100 is about 5km
Travis,
I played with a couple of these a few years ago. They "may" be good for FM, but don't bother for AM. There are 3 problems:
1. The circuit consists of a high gain wide-band amplifier "IC" (4 terminal surface mount) followed by an output transistor. The IC has a very sensitive input circuit and can be easily blown out by the output of a 100mW transmitter. You can attenuate the TX output, but with risk. I cooked up a variable attenuator and played with it a little too much ... poof!
2. The output transistor has a very low value inductance in series to the power supply. This will shunt low AM frequencies. The amp would require modifications to work in the AM band.
3. As with several Ramsey kits, the output transistor gets too hot to touch. This doesn't necessarily mean it is being overstressed.
If you're talking FM, then I don't have any experience with it. I would still caution that you don't over drive it into oblivion.
I might be wrong, but I dont think it will work on a.m., this was used on f.m. as I understand it was used that way, if it is a class C amp then it wont work with a A.M. signal,it would half to be a class B I think.
This module is supposed to be able to amplify down to 300 kHz, and the "linear" name suggests it should be OK for AM. However, as with most Ramsey stuff, it's overpriced junk. It has an MMIC driving a "1 Watt" output transistor. It has no attempt at output matching or filtering, and if connected to the output of something as nasty as a Ramsey transmitter, then it will reproduce spurs and harmonics all over the place!
not to mention anything other than a perfect load will cause the transister to pop.