[AMRadio] Small RF Amp ideas


Geoff ars.w5omr at gmail.com
Wed Oct 22 17:01:01 EDT 2014


I have a ts2000 and a ts450s. I prefer using the ts450s because it has separate carrier and power level controls. 
The 2k does, but is throttled back to 25w output carrier.  In order to make it sound decent,  driving an amp, the carrier must be dropped back to around 1/4 of 25w, or around 6w. On the TL-922A, (pair 3-500z) that made for about 80w of carrier or 320 pep (not accurately measured).
A pair of 3-500z's need about 100w pep to get em up to ~1kW pep.  The Ts450s would deliver.  The Ts2000. .. not so much. 

That was my experience, anyway. 

Geoff/W5OMR.



<div>-------- Original message --------</div><div>From: rbethman <rbethman at comcast.net> </div><div>Date:10/22/2014  12:20  (GMT-06:00) </div><div>To: AM Radio List <amradio at mailman.qth.net> </div><div>Subject: [AMRadio] Small RF Amp ideas </div><div>
</div>I am currently using a Kenwood TS-2000 on AM.

It puts out 25W on AM. The modulation is pathetic, but this is what I 
have to live with due to physical issues. If I can get that 25W to 
about 100, then I'll get a much better signal out of the Amp Supply 
LK-500ZB.

What would a small intermediate amplifier take to make?

I just need to stay "relatively" close to what the built-in AT in the 
TS-2000 can deal with.

I can tune the input of the LK-500ZB to better match the output of this 
intermediate amplifier.

BTW - 807s abound here. Also 1625s.
-- 
Bob - N0DGN
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