[NLRS] TE 1410G 2m amp question

[Doug Reed]

Older commercial 2M FM mobiles of the 110 watt output class are usually 
fused at 30 amps and I expect current draw to be in the 22-25 amp range. 
You are talking 25% higher output power which would put current in the 
28-32 amp range. This is for a radio that is solidly class C with plain 
bipolar technology. I would expect the TE1410 to use more current if it 
is running in a linear mode. You might reduce the current some if the 
transistors are fairly recent modern technology. I expect you'd draw 
higher than usual current if there was a lot of voltage drop in the 
wires or at the power supply.

On the other hand, your numbers are about 25% efficiency, which is also 
hard to credit without the amp being in class A mode....
Does it have some sort of dynamic bias circuit which adjusts the 
operating point based on minimum drive level??

73, Doug Reed, N0NAS.

W0ZQ at aol.com wrote:
> I have a TE 1410G 2m amplifier that I bought used some time back.  I  have 
> never cracked the cover on it, and it works "OK".  However, one of its  quirks 
> is that it seems to draw a lot of +12 vdc power when driven with normal  RF 
> input levels.   For example, at 10 watts in it produces 140 watts  out, but the 
> current drain is about 40 amps.  This seems way high and yes,  it will run hot. 
>  Any thoughts as to why this amp is doing this ?  Is  this a bias issue or 
> normal for this amp ?  It doesn't seem to be an  RF drive issue because lesser 
> RF drive levels produces less output in a linear  fashion, but the current 
> stays pretty high.  I thought about maybe an  oscillation but with no input power, 
> just PTT activated, it behaves and 12 vdc  current is normal (low).  I have 
> never had any comment about bad audio with  it.  
>  
> Any suggestions appreciated.
>
> 73, Jon
> W0ZQ
>  
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