[AMRadio] Transmitting Mica F2 -vs- G2 types


A.R.S. - WA5AM ars.w5ami at gmail.com
Thu Sep 13 13:48:53 EDT 2007


Sorry, I meant the two I have now are both 3000pF.  Yeah, that would
have worked out great Barrie.  I do plan to use the two 3000pF's in
series for 160m however...

Thanks,
Brian

On 9/13/07, Barrie Smith <barrie at centric.net> wrote:
> Why not put the two you have in there now in series?
>
> That would equal 750 pf, with plenty of voltage and current capability.
>
> 73, Barrie, W7ALW
>
>
> ----- Original Message -----
> From: "A.R.S. - WA5AM" <ars.w5ami at gmail.com>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Thursday, September 13, 2007 11:01 AM
> Subject: [AMRadio] Transmitting Mica F2 -vs- G2 types
>
>
> > I am getting ready to convert my Gates BC-1T to 75 and 160 and need
> > some opinions on the loading cap.  The 1T uses fixed capacitance and a
> > variable inductor for loading.  I need about 750 pF for the loading
> > cap on 75 meters.  The original loading caps (two in parallel) are G2
> > micas at 8000 vdc, however they are both 1500 pF.  I have a type F2B
> > that is 800 pF at 6000 vdc, that would be close enough, but I'm afraid
> > it may not handle the current.  The F2 is a much smaller unit than the
> > G2's that are in there now.  Anyone have any opinions on what the F2
> > can handle?  Being on a higher freq. than original design I think the
> > 6KV rating might be okay, but I'm still concerned with the current
> > rating of the F2 as opposed to the type G2.
> >
> > Nebraska Surplus has what I'm looking for, but they want $175 for it.
> >
> > Thanks,
> > Brian / wa5am
> >
> >
> > --
> > "Money is only temporary, but radios are forever" - Jim Little aka
> > "the old dog"/K5BAI
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-- 
"Money is only temporary, but radios are forever" - Jim Little aka
"the old dog"/K5BAI


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