[Amps] DRAKE L-7

[Jim Thomson]

Date: Mon, 5 Apr 2010 21:38:15 -0500
From: "Bob AD5VJ" <ad5vj at ad5vj.com>
Subject: Re: [Amps] DRAKE L-7



I am looking at the meter right now in ssb mode and it shows at idle 3600
Plate Volts and zero plate amps. 

##  My guess is, it has an after market xfmr in it.   I own  4 x L4B's
and they are all 2650 vdc  no load..... and  2500 vdc  @  800 ma...cxr. 
2 kw dc input.. and 1290 w out.    The  L4PS  and L7PS  are identical. 

I think the power meter is supposed to be reading power out to the antenna
but not sure it could be power input to the plate. Doesn't the output power
in this case seem a little high on the drake avg power meter? 

##  all wattmeters read OUTPUT power.  The  L7  reads AVERAGE power,
unless it has a PEP  board installed. 

## do u have another wattmeter  u can try?   What  do u get  when u quickly
whack it with a 2 x sec  dead cxr ?? 

later... Jim   VE7RF




Bob AD5VJ