Topband: Fixed capacitor source needed (150pf 5KV)
Fortra
fortra at siol.net
Thu Oct 3 10:52:48 EDT 2013
Hi Herb,
same thing happened to me, and i have used Russian
doorknob capacitors very close in value ( i think i have combined
100 and 47 pf ). Try dr.Alex website for those...
A friend of mine, replaced ALL of the PCB capacitors and since that time
on, no problems...
Of course, do not push more then 1500 to 2000 watts at big mismatches :)
It is my favourite tuner,
Gl Nermin S58DX
----- Original Message -----
From: "Herb Schoenbohm" <herbs at vitelcom.net>
To: "TopBand List" <topband at contesting.com>; <towertalk at contesting.com>
Sent: Thursday, October 03, 2013 4:45 PM
Subject: Topband: Fixed capacitor source needed (150pf 5KV)
>I have a Drake MN2700 so I can at least get the amp to work above
> 1870Khz during contests. The tuner used some fixed flat 150pf 5KV
> capacitors to switch in from the front selector as increased capacity is
> need to make the tuner work. I can't find any door knob substitutes at
> that value in my junk box. I am thus looking for a source for these
> values but so far have not found anything that I can use as a
> substitute. I presume I could make some out of sections of RG-8 mini
> roller up in a coIl but before I try this I am searching for a door knob
> source. I have some 500pf at 5KV and three of them in series might be
> close enough but i still need the correct values. If any reader to this
> knows of other ATU manufactures that use the copper teflon flat
> capacitor in their units maybe could order 150 pf 5KV from them.
>
>
> Your help on this would be appreciated.
>
>
> Herb, KV4FZ
> _________________
> Topband Reflector
>
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