[Amps] Monitor RF output on computer screen

[Jim Brown]

Thanks Jim and Jim. Sounds like AS has introduced new units since I last 
looked at them.

73, Jim K9YC

On 3/14/2020 11:36 AM, Jim Thomson wrote:
> Date: Fri, 13 Mar 2020 14:15:24 -0700
> From: Jim Brown <jim at audiosystemsgroup.com>
> To: amps at contesting.com
> Subject: Re: [Amps] Monitor RF output on computer screen
> 
> On 3/13/2020 1:38 PM, Jim wrote:
>> That is debatable.
> 
> <Not if you study the data sheets and specs for both.
> 
> <The LP100A can read complex impedance at the point of measurement on the
> <line, so it could be used to find the input Z of a power amp (using a
> <Smith Chart to account for line length from the coupler to the amp). It
> <The unit is factory-calibrated to NIST, power accuracy is 5% worst case,
> <3% typical, at any signal level from 1W to rated power. It can read peak
> <hold, average, and instantaneous peaks. It can auto-switch between two
> <couplers on the outputs of my SO2R contesting station.
> 
> <73, Jim K9YC
> 
> ## Does  the  LP-100  or  100A have  3  x  different  methods  to  shut  down an  amp ??
> 
> ##  The  array  solutions  does!
> - TX  inhibit on  xcvr.
> -  open  off  key  line....which  does  NOT  work  on  alpha  amps.
> -  apply 0-9  negative  volts  to  ALC  on back  of  xcvr.
> 
> ##  In my   case, I  paralleled  2 x identical  displays  ....  to  ONE  coupler,  with one  display  in shop  next  door,
> and  2nd  display in  the  shack.  They both  indicate  identical  info.  With  2 x displays   operating,  I  now have
> 2 x methods  to  shut  down an  amp.
> 
> ##   The  array solutions  displays  show  peaks  so  fast, they  also  easily show  ripple  on  the   B+  as well.
> Last  LED  will...dither.
> 
> ##  I  already  know  the  exact  input  Z  to    amps,  moot  point.   An MFJ-259B  on  input  to  amp,  plus  a 0-100  ohm  pot  at  cathode
> will  work  well.  Pot  resistance =  input  Z.  Cathode  to grid  C  is  ...free  C2  on the  PI  tuned input.
> 
> ##  AS  has HF  couplers  for....  3 kw,  10 kw,  20  kw.   They  ALL  work  extremely  well.
> Also, couplers  can  be  ordered  with  7-16 DIN  connectors.
> 
> Jim   VE7RF
> 
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>