[Boatanchors] 600 ohm Z for Transmitter Audio

[Carl]

----- Original Message ----- 
From: "BLIMPY" <blimpboy at sonic.net>
To: <boatanchors at mailman.qth.net>
Sent: Wednesday, November 19, 2008 2:50 PM
Subject: [Boatanchors] 600 ohm Z for Transmitter Audio


>
> Please,
>              Keep it simple ( kiss principle).
>
> 1. Find a suitable audio amplifier you like.
>    A Bogen or similar PA amp should be fine  - give yourself some 
> headroom by haveing 25 % more audio power available than you need.


I didnt know that you were sneaking around my basement Larry.

A Bogen PP 6L6 PA amp with a 70.7V tap drives PP 810's just fine and Ive 
also tested it on the PP 250TH's deck.

Carl
KM1H





>
> 2. Find  either :
>    A. an audio transformer which either will match 4/8/16 ohms  on one 
> side to 600 ohms on the other
>
>                                   OR
>
>   B.   An audio output transformer which will Match the Plate to Plate 
> Z of the Audio Output Tubes and provide 600 ohms output.
>
>  *  NB... in either case.. chose the frequency response you can live 
> with ( 100 cps to 5000 cps should be fine for ham work )
>                and the power level as noted in 1 above.
>
>
> If no body will sell you a 600 z audio transformer... I will.
>
> Larry
>
>
> _______________________________________________
>