[AMRadio] Valiant PI net caps

Tue Feb 21 17:01:54 EST 2012

I was not able to keep the smoke in the 500 volt caps.Got 1500  volt ones, 
so far, holding up. Not sure if this indicates another problem, There  was a 
discussion about this on the AM radio forum..........de  WA2FNS

In a message dated 2/21/2012 12:21:16 P.M. Eastern Standard Time,  
lafrieda at earthlink.net writes:

Hi  Larry,

Have a Valiant, and although I haven't replaced the tank caps, I  looked 
at the Valiant schematic and noticed that the tank caps are C 38 A,  B, 
C, D at *150 mmf 500 V 5% silver mica*, and that the C39A, B, C and D  
are *350 mmf , 500 V  5% silver mica capacitors.*

If you go to  justradios.com and look at their on-line Excel Order Form, 
you will note  that they sell Silver mica capacitors at 500 V, 1000 V, 
1600 V and  6000V.

150 pf at 500 V  are .79 each

350 pf at 500 V  are  .99 each

All the Best,
Jim ( N6MV)

On  2/21/2012 8:36 AM, Lawrence Steeno wrote:
> Good day, I have 2 Valiant  transmitters on my bench now with leaky tank 
caps, especially the 300 mmf one.  The octagon one with 3 caps in it are 
some what okay but suspect. There is  another Valiant that is waiting for some 
also. Now I am wondering where I may  get some of these for replacement. I 
tried RF Parts with no luck. I tried  regular ceramic caps and they failed 
soon so I tried snubber caps at 2KV and  they failed also. Where may I look 
and for what?
> I am lost and these  transmitters are great units and should be warming 
up the ionosphere rather  than holding down the top of my bench.
> Thanks a bunch.
> Larry  K9LWI
>
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