Re: {Collins} Collins Digest, Vol 79, Issue 6



Re: Testing 811
Thanks Roy ,
I have been planning on building a tester for power tubes and this helps it
happen sooner ;)
Thanks
John

On Mon, Apr 6, 2015 at 9:32 AM, Roy Morgan <k1lky68@xxxxxxxxx> wrote:

>
> On Apr 6, 2015, at 9:54 AM, John tf <john.faughn@xxxxxxxxx> wrote:
>
> > RE: Testing 811 or most amp type tubes , a tube tester is only a partial
> > test of amp tubes ,...
> > I know of no tester that has enough power to do a full test ?
>
> There was published a full-out tester for transmitting tubes.  It was a
> self-excited oscillator that ran the tube at significant plate voltages,
> current and RF load at 14 mc.
>
> GE Ham News 1951  Volume 6  Number 3 May-Jun  Transmitter Tube Testing
>
> You can get your copy of this at:
> http://n4trb.com/AmateurRadio/GE_HamNews/ge_ham_news.htm
>
> The Article tells the need to run three different tests:
> - short and continuity test
> - static characteristics test
> - oscillation test or limited peak emission test
>
> In the oscillation test the 811A is tested at 1500 volts on the plate at
> 150 ma.
>
> Roy
>
> Roy Morgan
> k1lky68@xxxxxxxxx
> K1LKY Since 1958
>
>



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