[Johnson] Amp advice

[Jim Brannigan]

The rule of thumb is to run an AM linear AMP power input at no more than the 
plate dissapation of the tube.  For a 3-500Z that is 500 Watts.
 30% efficiency in that mode means 150 Watts to the antenna.

Also, you will have to reduce the Ranger output to 20 watts or less, a 
resistive attenuator is the best way to do it.

Jim

>
>
> On Sat, 29 Oct 2005, Ed Tanton wrote:
>
>> Well... just my 2 cents, mind you... but it's bad enough using a linear 
>> for AM, considering the efficiency yielding only a little more signal 
>> than talking louder would accomplish... but a **SINGLE** 3-500Z combined 
>> with all that INefficiency? Complete waste of time and 3-500Z after (what 
>> will be) short-lived 3-500Z.
>>
>          Nummer Five - No one's actually *answered* the questions I have 
> about 'waking up' the amp. (Yet, at any rate.) There has been some very 
> pertinent and helpful advice, however - much appreciated.